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Add rc522 i2c (#1432)
* split to spi and i2c * fix binary_sensor * i2c comms ready * fix rc522_spi binary sensor compat * lint * lint * add test and codeowners * fix refactor
This commit is contained in:
Guillermo Ruffino
committed by
GitHub
GitHub
parent
400819175d
commit
fbc1b3e316
@@ -1,39 +1,21 @@
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import esphome.codegen as cg
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import esphome.config_validation as cv
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from esphome import automation, pins
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from esphome.components import spi
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from esphome.const import CONF_ID, CONF_ON_TAG, CONF_TRIGGER_ID, CONF_RESET_PIN, CONF_CS_PIN
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from esphome.components import spi, rc522
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from esphome.const import CONF_ID
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CODEOWNERS = ['@glmnet']
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DEPENDENCIES = ['spi']
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AUTO_LOAD = ['binary_sensor']
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MULTI_CONF = True
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AUTO_LOAD = ['rc522']
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rc522_spi_ns = cg.esphome_ns.namespace('rc522_spi')
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RC522 = rc522_spi_ns.class_('RC522', cg.PollingComponent, spi.SPIDevice)
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RC522Trigger = rc522_spi_ns.class_('RC522Trigger', automation.Trigger.template(cg.std_string))
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RC522Spi = rc522_spi_ns.class_('RC522Spi', rc522.RC522, spi.SPIDevice)
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CONFIG_SCHEMA = cv.Schema({
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cv.GenerateID(): cv.declare_id(RC522),
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cv.Optional(CONF_RESET_PIN): pins.gpio_output_pin_schema,
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cv.Required(CONF_CS_PIN): pins.gpio_output_pin_schema,
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cv.Optional(CONF_ON_TAG): automation.validate_automation({
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cv.GenerateID(CONF_TRIGGER_ID): cv.declare_id(RC522Trigger),
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}),
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}).extend(cv.polling_component_schema('1s')).extend(spi.spi_device_schema())
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CONFIG_SCHEMA = cv.All(rc522.RC522_SCHEMA.extend({
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cv.GenerateID(): cv.declare_id(RC522Spi),
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}).extend(spi.spi_device_schema(cs_pin_required=True)))
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def to_code(config):
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var = cg.new_Pvariable(config[CONF_ID])
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yield cg.register_component(var, config)
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yield rc522.setup_rc522(var, config)
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yield spi.register_spi_device(var, config)
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if CONF_RESET_PIN in config:
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reset = yield cg.gpio_pin_expression(config[CONF_RESET_PIN])
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cg.add(var.set_reset_pin(reset))
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for conf in config.get(CONF_ON_TAG, []):
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trigger = cg.new_Pvariable(conf[CONF_TRIGGER_ID])
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cg.add(var.register_trigger(trigger))
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yield automation.build_automation(trigger, [(cg.std_string, 'x')], conf)
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@@ -1,44 +1,9 @@
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import esphome.codegen as cg
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import esphome.config_validation as cv
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from esphome.components import binary_sensor
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from esphome.const import CONF_UID, CONF_ID
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from esphome.core import HexInt
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from . import rc522_spi_ns, RC522
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import esphome.components.rc522.binary_sensor as rc522_binary_sensor
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DEPENDENCIES = ['rc522_spi']
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DEPENDENCIES = ['rc522']
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CONF_RC522_ID = 'rc522_id'
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def validate_uid(value):
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value = cv.string_strict(value)
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for x in value.split('-'):
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if len(x) != 2:
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raise cv.Invalid("Each part (separated by '-') of the UID must be two characters "
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"long.")
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try:
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x = int(x, 16)
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except ValueError as err:
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raise cv.Invalid("Valid characters for parts of a UID are 0123456789ABCDEF.") from err
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if x < 0 or x > 255:
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raise cv.Invalid("Valid values for UID parts (separated by '-') are 00 to FF")
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return value
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RC522BinarySensor = rc522_spi_ns.class_('RC522BinarySensor', binary_sensor.BinarySensor)
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CONFIG_SCHEMA = binary_sensor.BINARY_SENSOR_SCHEMA.extend({
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cv.GenerateID(): cv.declare_id(RC522BinarySensor),
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cv.GenerateID(CONF_RC522_ID): cv.use_id(RC522),
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cv.Required(CONF_UID): validate_uid,
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})
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CONFIG_SCHEMA = rc522_binary_sensor.CONFIG_SCHEMA
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def to_code(config):
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var = cg.new_Pvariable(config[CONF_ID])
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yield binary_sensor.register_binary_sensor(var, config)
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hub = yield cg.get_variable(config[CONF_RC522_ID])
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cg.add(hub.register_tag(var))
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addr = [HexInt(int(x, 16)) for x in config[CONF_UID].split('-')]
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cg.add(var.set_uid(addr))
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yield rc522_binary_sensor.to_code(config)
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@@ -9,218 +9,30 @@ namespace rc522_spi {
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static const char *TAG = "rc522_spi";
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static const uint8_t RESET_COUNT = 5;
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void RC522Spi::setup() {
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ESP_LOGI(TAG, "SPI Setup");
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this->spi_setup();
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void format_uid(char *buf, const uint8_t *uid, uint8_t uid_length) {
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int offset = 0;
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for (uint8_t i = 0; i < uid_length; i++) {
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const char *format = "%02X";
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if (i + 1 < uid_length)
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format = "%02X-";
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offset += sprintf(buf + offset, format, uid[i]);
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}
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RC522::setup();
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}
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void RC522::setup() {
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spi_setup();
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initialize_pending_ = true;
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// Pull device out of power down / reset state.
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// First set the resetPowerDownPin as digital input, to check the MFRC522 power down mode.
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if (reset_pin_ != nullptr) {
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reset_pin_->pin_mode(INPUT);
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if (reset_pin_->digital_read() == LOW) { // The MFRC522 chip is in power down mode.
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ESP_LOGV(TAG, "Power down mode detected. Hard resetting...");
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reset_pin_->pin_mode(OUTPUT); // Now set the resetPowerDownPin as digital output.
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reset_pin_->digital_write(LOW); // Make sure we have a clean LOW state.
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delayMicroseconds(2); // 8.8.1 Reset timing requirements says about 100ns. Let us be generous: 2μsl
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reset_pin_->digital_write(HIGH); // Exit power down mode. This triggers a hard reset.
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// Section 8.8.2 in the datasheet says the oscillator start-up time is the start up time of the crystal + 37,74μs.
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// Let us be generous: 50ms.
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reset_timeout_ = millis();
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return;
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}
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}
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// Setup a soft reset
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reset_count_ = RESET_COUNT;
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reset_timeout_ = millis();
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}
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void RC522::initialize_() {
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// Per originall code, wait 50 ms
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if (millis() - reset_timeout_ < 50)
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return;
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// Reset baud rates
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ESP_LOGV(TAG, "Initialize");
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pcd_write_register_(TX_MODE_REG, 0x00);
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pcd_write_register_(RX_MODE_REG, 0x00);
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// Reset ModWidthReg
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pcd_write_register_(MOD_WIDTH_REG, 0x26);
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// When communicating with a PICC we need a timeout if something goes wrong.
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// f_timer = 13.56 MHz / (2*TPreScaler+1) where TPreScaler = [TPrescaler_Hi:TPrescaler_Lo].
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// TPrescaler_Hi are the four low bits in TModeReg. TPrescaler_Lo is TPrescalerReg.
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pcd_write_register_(T_MODE_REG, 0x80); // TAuto=1; timer starts automatically at the end of the transmission in all
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// communication modes at all speeds
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// TPreScaler = TModeReg[3..0]:TPrescalerReg, ie 0x0A9 = 169 => f_timer=40kHz, ie a timer period of 25μs.
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pcd_write_register_(T_PRESCALER_REG, 0xA9);
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pcd_write_register_(T_RELOAD_REG_H, 0x03); // Reload timer with 0x3E8 = 1000, ie 25ms before timeout.
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pcd_write_register_(T_RELOAD_REG_L, 0xE8);
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// Default 0x00. Force a 100 % ASK modulation independent of the ModGsPReg register setting
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pcd_write_register_(TX_ASK_REG, 0x40);
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pcd_write_register_(MODE_REG, 0x3D); // Default 0x3F. Set the preset value for the CRC coprocessor for the CalcCRC
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// command to 0x6363 (ISO 14443-3 part 6.2.4)
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pcd_antenna_on_(); // Enable the antenna driver pins TX1 and TX2 (they were disabled by the reset)
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initialize_pending_ = false;
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}
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void RC522::dump_config() {
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ESP_LOGCONFIG(TAG, "RC522:");
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switch (this->error_code_) {
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case NONE:
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break;
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case RESET_FAILED:
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ESP_LOGE(TAG, "Reset command failed!");
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break;
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}
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void RC522Spi::dump_config() {
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RC522::dump_config();
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LOG_PIN(" CS Pin: ", this->cs_);
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LOG_PIN(" RESET Pin: ", this->reset_pin_);
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LOG_UPDATE_INTERVAL(this);
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for (auto *child : this->binary_sensors_) {
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LOG_BINARY_SENSOR(" ", "Tag", child);
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}
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}
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void RC522::loop() {
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// First check reset is needed
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if (reset_count_ > 0) {
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pcd_reset_();
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return;
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}
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if (initialize_pending_) {
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initialize_();
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return;
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}
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if (millis() - update_wait_ < this->update_interval_)
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return;
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auto status = picc_is_new_card_present_();
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if (status == STATUS_ERROR) // No card
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{
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ESP_LOGE(TAG, "Error");
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// mark_failed();
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return;
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}
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if (status != STATUS_OK) // We can receive STATUS_TIMEOUT when no card, or unexpected status.
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return;
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// Try process card
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if (!picc_read_card_serial_()) {
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ESP_LOGW(TAG, "Requesting tag read failed!");
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return;
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};
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if (uid_.size < 4) {
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return;
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ESP_LOGW(TAG, "Read serial size: %d", uid_.size);
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}
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update_wait_ = millis();
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bool report = true;
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// 1. Go through all triggers
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for (auto *trigger : this->triggers_)
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trigger->process(uid_.uiduint8_t, uid_.size);
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// 2. Find a binary sensor
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for (auto *tag : this->binary_sensors_) {
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if (tag->process(uid_.uiduint8_t, uid_.size)) {
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// 2.1 if found, do not dump
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report = false;
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}
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}
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if (report) {
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char buf[32];
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format_uid(buf, uid_.uiduint8_t, uid_.size);
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ESP_LOGD(TAG, "Found new tag '%s'", buf);
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}
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}
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void RC522::update() {
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for (auto *obj : this->binary_sensors_)
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obj->on_scan_end();
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}
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/**
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* Performs a soft reset on the MFRC522 chip and waits for it to be ready again.
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*/
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void RC522::pcd_reset_() {
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// The datasheet does not mention how long the SoftRest command takes to complete.
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// But the MFRC522 might have been in soft power-down mode (triggered by bit 4 of CommandReg)
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// Section 8.8.2 in the datasheet says the oscillator start-up time is the start up time of the crystal + 37,74μs. Let
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// us be generous: 50ms.
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if (millis() - reset_timeout_ < 50)
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return;
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if (reset_count_ == RESET_COUNT) {
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ESP_LOGV(TAG, "Soft reset...");
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// Issue the SoftReset command.
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pcd_write_register_(COMMAND_REG, PCD_SOFT_RESET);
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}
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// Expect the PowerDown bit in CommandReg to be cleared (max 3x50ms)
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if ((pcd_read_register_(COMMAND_REG) & (1 << 4)) == 0) {
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reset_count_ = 0;
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ESP_LOGI(TAG, "Device online.");
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// Wait for initialize
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reset_timeout_ = millis();
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return;
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}
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if (--reset_count_ == 0) {
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ESP_LOGE(TAG, "Unable to reset RC522.");
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mark_failed();
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}
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}
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/**
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* Turns the antenna on by enabling pins TX1 and TX2.
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* After a reset these pins are disabled.
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*/
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void RC522::pcd_antenna_on_() {
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uint8_t value = pcd_read_register_(TX_CONTROL_REG);
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if ((value & 0x03) != 0x03) {
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pcd_write_register_(TX_CONTROL_REG, value | 0x03);
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}
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}
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/**
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* Reads a uint8_t from the specified register in the MFRC522 chip.
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* The interface is described in the datasheet section 8.1.2.
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*/
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uint8_t RC522::pcd_read_register_(PcdRegister reg ///< The register to read from. One of the PCD_Register enums.
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uint8_t RC522Spi::pcd_read_register(PcdRegister reg ///< The register to read from. One of the PCD_Register enums.
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) {
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uint8_t value;
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enable();
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transfer_byte(0x80 | reg);
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value = read_byte();
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disable();
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ESP_LOGVV(TAG, "read_register_(%x) -> %x", reg, value);
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ESP_LOGV(TAG, "read_register_(%x) -> %x", reg, value);
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return value;
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}
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@@ -228,10 +40,10 @@ uint8_t RC522::pcd_read_register_(PcdRegister reg ///< The register to read fro
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* Reads a number of uint8_ts from the specified register in the MFRC522 chip.
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* The interface is described in the datasheet section 8.1.2.
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*/
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void RC522::pcd_read_register_(PcdRegister reg, ///< The register to read from. One of the PCD_Register enums.
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uint8_t count, ///< The number of uint8_ts to read
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uint8_t *values, ///< uint8_t array to store the values in.
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uint8_t rx_align ///< Only bit positions rxAlign..7 in values[0] are updated.
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void RC522Spi::pcd_read_register(PcdRegister reg, ///< The register to read from. One of the PCD_Register enums.
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uint8_t count, ///< The number of uint8_ts to read
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uint8_t *values, ///< uint8_t array to store the values in.
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uint8_t rx_align ///< Only bit positions rxAlign..7 in values[0] are updated.
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) {
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std::string buf;
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buf = "Rx";
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@@ -278,8 +90,8 @@ void RC522::pcd_read_register_(PcdRegister reg, ///< The register to read from.
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disable();
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}
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void RC522::pcd_write_register_(PcdRegister reg, ///< The register to write to. One of the PCD_Register enums.
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uint8_t value ///< The value to write.
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void RC522Spi::pcd_write_register(PcdRegister reg, ///< The register to write to. One of the PCD_Register enums.
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uint8_t value ///< The value to write.
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) {
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enable();
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// MSB == 0 is for writing. LSB is not used in address. Datasheet section 8.1.2.3.
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@@ -292,9 +104,9 @@ void RC522::pcd_write_register_(PcdRegister reg, ///< The register to write to.
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* Writes a number of uint8_ts to the specified register in the MFRC522 chip.
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* The interface is described in the datasheet section 8.1.2.
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*/
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void RC522::pcd_write_register_(PcdRegister reg, ///< The register to write to. One of the PCD_Register enums.
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uint8_t count, ///< The number of uint8_ts to write to the register
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uint8_t *values ///< The values to write. uint8_t array.
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void RC522Spi::pcd_write_register(PcdRegister reg, ///< The register to write to. One of the PCD_Register enums.
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uint8_t count, ///< The number of uint8_ts to write to the register
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uint8_t *values ///< The values to write. uint8_t array.
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) {
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std::string buf;
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buf = "Tx";
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@@ -313,545 +125,5 @@ void RC522::pcd_write_register_(PcdRegister reg, ///< The register to write to.
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ESP_LOGVV(TAG, "write_register_(%x, %d) -> %s", reg, count, buf.c_str());
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}
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/**
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* Transmits a REQuest command, Type A. Invites PICCs in state IDLE to go to READY and prepare for anticollision or
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* selection. 7 bit frame. Beware: When two PICCs are in the field at the same time I often get STATUS_TIMEOUT -
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* probably due do bad antenna design.
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*
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* @return STATUS_OK on success, STATUS_??? otherwise.
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*/
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RC522::StatusCode RC522::picc_request_a_(
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uint8_t *buffer_atqa, ///< The buffer to store the ATQA (Answer to request) in
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uint8_t *buffer_size ///< Buffer size, at least two uint8_ts. Also number of uint8_ts returned if STATUS_OK.
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) {
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return picc_reqa_or_wupa_(PICC_CMD_REQA, buffer_atqa, buffer_size);
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}
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/**
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* Transmits REQA or WUPA commands.
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* Beware: When two PICCs are in the field at the same time I often get STATUS_TIMEOUT - probably due do bad antenna
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* design.
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*
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* @return STATUS_OK on success, STATUS_??? otherwise.
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*/
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RC522::StatusCode RC522::picc_reqa_or_wupa_(
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uint8_t command, ///< The command to send - PICC_CMD_REQA or PICC_CMD_WUPA
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uint8_t *buffer_atqa, ///< The buffer to store the ATQA (Answer to request) in
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uint8_t *buffer_size ///< Buffer size, at least two uint8_ts. Also number of uint8_ts returned if STATUS_OK.
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) {
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uint8_t valid_bits;
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RC522::StatusCode status;
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if (buffer_atqa == nullptr || *buffer_size < 2) { // The ATQA response is 2 uint8_ts long.
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return STATUS_NO_ROOM;
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}
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pcd_clear_register_bit_mask_(COLL_REG, 0x80); // ValuesAfterColl=1 => Bits received after collision are cleared.
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valid_bits = 7; // For REQA and WUPA we need the short frame format - transmit only 7 bits of the last (and only)
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// uint8_t. TxLastBits = BitFramingReg[2..0]
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status = pcd_transceive_data_(&command, 1, buffer_atqa, buffer_size, &valid_bits);
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if (status != STATUS_OK)
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return status;
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if (*buffer_size != 2 || valid_bits != 0) { // ATQA must be exactly 16 bits.
|
||||
ESP_LOGVV(TAG, "picc_reqa_or_wupa_() -> STATUS_ERROR");
|
||||
return STATUS_ERROR;
|
||||
}
|
||||
|
||||
return STATUS_OK;
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the bits given in mask in register reg.
|
||||
*/
|
||||
void RC522::pcd_set_register_bit_mask_(PcdRegister reg, ///< The register to update. One of the PCD_Register enums.
|
||||
uint8_t mask ///< The bits to set.
|
||||
) {
|
||||
uint8_t tmp = pcd_read_register_(reg);
|
||||
pcd_write_register_(reg, tmp | mask); // set bit mask
|
||||
}
|
||||
|
||||
/**
|
||||
* Clears the bits given in mask from register reg.
|
||||
*/
|
||||
void RC522::pcd_clear_register_bit_mask_(PcdRegister reg, ///< The register to update. One of the PCD_Register enums.
|
||||
uint8_t mask ///< The bits to clear.
|
||||
) {
|
||||
uint8_t tmp = pcd_read_register_(reg);
|
||||
pcd_write_register_(reg, tmp & (~mask)); // clear bit mask
|
||||
}
|
||||
|
||||
/**
|
||||
* Executes the Transceive command.
|
||||
* CRC validation can only be done if backData and backLen are specified.
|
||||
*
|
||||
* @return STATUS_OK on success, STATUS_??? otherwise.
|
||||
*/
|
||||
RC522::StatusCode RC522::pcd_transceive_data_(
|
||||
uint8_t *send_data, ///< Pointer to the data to transfer to the FIFO.
|
||||
uint8_t send_len, ///< Number of uint8_ts to transfer to the FIFO.
|
||||
uint8_t *back_data, ///< nullptr or pointer to buffer if data should be read back after executing the command.
|
||||
uint8_t *back_len, ///< In: Max number of uint8_ts to write to *backData. Out: The number of uint8_ts returned.
|
||||
uint8_t
|
||||
*valid_bits, ///< In/Out: The number of valid bits in the last uint8_t. 0 for 8 valid bits. Default nullptr.
|
||||
uint8_t rx_align, ///< In: Defines the bit position in backData[0] for the first bit received. Default 0.
|
||||
bool check_crc ///< In: True => The last two uint8_ts of the response is assumed to be a CRC_A that must be
|
||||
///< validated.
|
||||
) {
|
||||
uint8_t wait_i_rq = 0x30; // RxIRq and IdleIRq
|
||||
auto ret = pcd_communicate_with_picc_(PCD_TRANSCEIVE, wait_i_rq, send_data, send_len, back_data, back_len, valid_bits,
|
||||
rx_align, check_crc);
|
||||
|
||||
if (ret == STATUS_OK && *back_len == 5)
|
||||
ESP_LOGVV(TAG, "pcd_transceive_data_(..., %d, ) -> %d [%x, %x, %x, %x, %x]", send_len, ret, back_data[0],
|
||||
back_data[1], back_data[2], back_data[3], back_data[4]);
|
||||
else
|
||||
ESP_LOGVV(TAG, "pcd_transceive_data_(..., %d, ... ) -> %d", send_len, ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* Transfers data to the MFRC522 FIFO, executes a command, waits for completion and transfers data back from the FIFO.
|
||||
* CRC validation can only be done if backData and backLen are specified.
|
||||
*
|
||||
* @return STATUS_OK on success, STATUS_??? otherwise.
|
||||
*/
|
||||
RC522::StatusCode RC522::pcd_communicate_with_picc_(
|
||||
uint8_t command, ///< The command to execute. One of the PCD_Command enums.
|
||||
uint8_t wait_i_rq, ///< The bits in the ComIrqReg register that signals successful completion of the command.
|
||||
uint8_t *send_data, ///< Pointer to the data to transfer to the FIFO.
|
||||
uint8_t send_len, ///< Number of uint8_ts to transfer to the FIFO.
|
||||
uint8_t *back_data, ///< nullptr or pointer to buffer if data should be read back after executing the command.
|
||||
uint8_t *back_len, ///< In: Max number of uint8_ts to write to *backData. Out: The number of uint8_ts returned.
|
||||
uint8_t *valid_bits, ///< In/Out: The number of valid bits in the last uint8_t. 0 for 8 valid bits.
|
||||
uint8_t rx_align, ///< In: Defines the bit position in backData[0] for the first bit received. Default 0.
|
||||
bool check_crc ///< In: True => The last two uint8_ts of the response is assumed to be a CRC_A that must be
|
||||
///< validated.
|
||||
) {
|
||||
ESP_LOGVV(TAG, "pcd_communicate_with_picc_(%d, %d,... %d)", command, wait_i_rq, check_crc);
|
||||
|
||||
// Prepare values for BitFramingReg
|
||||
uint8_t tx_last_bits = valid_bits ? *valid_bits : 0;
|
||||
uint8_t bit_framing =
|
||||
(rx_align << 4) + tx_last_bits; // RxAlign = BitFramingReg[6..4]. TxLastBits = BitFramingReg[2..0]
|
||||
|
||||
pcd_write_register_(COMMAND_REG, PCD_IDLE); // Stop any active command.
|
||||
pcd_write_register_(COM_IRQ_REG, 0x7F); // Clear all seven interrupt request bits
|
||||
pcd_write_register_(FIFO_LEVEL_REG, 0x80); // FlushBuffer = 1, FIFO initialization
|
||||
pcd_write_register_(FIFO_DATA_REG, send_len, send_data); // Write sendData to the FIFO
|
||||
pcd_write_register_(BIT_FRAMING_REG, bit_framing); // Bit adjustments
|
||||
pcd_write_register_(COMMAND_REG, command); // Execute the command
|
||||
if (command == PCD_TRANSCEIVE) {
|
||||
pcd_set_register_bit_mask_(BIT_FRAMING_REG, 0x80); // StartSend=1, transmission of data starts
|
||||
}
|
||||
|
||||
// Wait for the command to complete.
|
||||
// In PCD_Init() we set the TAuto flag in TModeReg. This means the timer automatically starts when the PCD stops
|
||||
// transmitting. Each iteration of the do-while-loop takes 17.86μs.
|
||||
// TODO check/modify for other architectures than Arduino Uno 16bit
|
||||
uint16_t i;
|
||||
for (i = 2000; i > 0; i--) {
|
||||
uint8_t n = pcd_read_register_(
|
||||
COM_IRQ_REG); // ComIrqReg[7..0] bits are: Set1 TxIRq RxIRq IdleIRq HiAlertIRq LoAlertIRq ErrIRq TimerIRq
|
||||
if (n & wait_i_rq) { // One of the interrupts that signal success has been set.
|
||||
break;
|
||||
}
|
||||
if (n & 0x01) { // Timer interrupt - nothing received in 25ms
|
||||
return STATUS_TIMEOUT;
|
||||
}
|
||||
}
|
||||
// 35.7ms and nothing happend. Communication with the MFRC522 might be down.
|
||||
if (i == 0) {
|
||||
return STATUS_TIMEOUT;
|
||||
}
|
||||
|
||||
// Stop now if any errors except collisions were detected.
|
||||
uint8_t error_reg_value = pcd_read_register_(
|
||||
ERROR_REG); // ErrorReg[7..0] bits are: WrErr TempErr reserved BufferOvfl CollErr CRCErr ParityErr ProtocolErr
|
||||
if (error_reg_value & 0x13) { // BufferOvfl ParityErr ProtocolErr
|
||||
return STATUS_ERROR;
|
||||
}
|
||||
|
||||
uint8_t valid_bits_local = 0;
|
||||
|
||||
// If the caller wants data back, get it from the MFRC522.
|
||||
if (back_data && back_len) {
|
||||
uint8_t n = pcd_read_register_(FIFO_LEVEL_REG); // Number of uint8_ts in the FIFO
|
||||
if (n > *back_len) {
|
||||
return STATUS_NO_ROOM;
|
||||
}
|
||||
*back_len = n; // Number of uint8_ts returned
|
||||
pcd_read_register_(FIFO_DATA_REG, n, back_data, rx_align); // Get received data from FIFO
|
||||
valid_bits_local =
|
||||
pcd_read_register_(CONTROL_REG) & 0x07; // RxLastBits[2:0] indicates the number of valid bits in the last
|
||||
// received uint8_t. If this value is 000b, the whole uint8_t is valid.
|
||||
if (valid_bits) {
|
||||
*valid_bits = valid_bits_local;
|
||||
}
|
||||
}
|
||||
|
||||
// Tell about collisions
|
||||
if (error_reg_value & 0x08) { // CollErr
|
||||
return STATUS_COLLISION;
|
||||
}
|
||||
|
||||
// Perform CRC_A validation if requested.
|
||||
if (back_data && back_len && check_crc) {
|
||||
// In this case a MIFARE Classic NAK is not OK.
|
||||
if (*back_len == 1 && valid_bits_local == 4) {
|
||||
return STATUS_MIFARE_NACK;
|
||||
}
|
||||
// We need at least the CRC_A value and all 8 bits of the last uint8_t must be received.
|
||||
if (*back_len < 2 || valid_bits_local != 0) {
|
||||
return STATUS_CRC_WRONG;
|
||||
}
|
||||
// Verify CRC_A - do our own calculation and store the control in controlBuffer.
|
||||
uint8_t control_buffer[2];
|
||||
RC522::StatusCode status = pcd_calculate_crc_(&back_data[0], *back_len - 2, &control_buffer[0]);
|
||||
if (status != STATUS_OK) {
|
||||
return status;
|
||||
}
|
||||
if ((back_data[*back_len - 2] != control_buffer[0]) || (back_data[*back_len - 1] != control_buffer[1])) {
|
||||
return STATUS_CRC_WRONG;
|
||||
}
|
||||
}
|
||||
|
||||
return STATUS_OK;
|
||||
}
|
||||
|
||||
/**
|
||||
* Use the CRC coprocessor in the MFRC522 to calculate a CRC_A.
|
||||
*
|
||||
* @return STATUS_OK on success, STATUS_??? otherwise.
|
||||
*/
|
||||
|
||||
RC522::StatusCode RC522::pcd_calculate_crc_(
|
||||
uint8_t *data, ///< In: Pointer to the data to transfer to the FIFO for CRC calculation.
|
||||
uint8_t length, ///< In: The number of uint8_ts to transfer.
|
||||
uint8_t *result ///< Out: Pointer to result buffer. Result is written to result[0..1], low uint8_t first.
|
||||
) {
|
||||
ESP_LOGVV(TAG, "pcd_calculate_crc_(..., %d, ...)", length);
|
||||
pcd_write_register_(COMMAND_REG, PCD_IDLE); // Stop any active command.
|
||||
pcd_write_register_(DIV_IRQ_REG, 0x04); // Clear the CRCIRq interrupt request bit
|
||||
pcd_write_register_(FIFO_LEVEL_REG, 0x80); // FlushBuffer = 1, FIFO initialization
|
||||
pcd_write_register_(FIFO_DATA_REG, length, data); // Write data to the FIFO
|
||||
pcd_write_register_(COMMAND_REG, PCD_CALC_CRC); // Start the calculation
|
||||
|
||||
// Wait for the CRC calculation to complete. Each iteration of the while-loop takes 17.73μs.
|
||||
// TODO check/modify for other architectures than Arduino Uno 16bit
|
||||
|
||||
// Wait for the CRC calculation to complete. Each iteration of the while-loop takes 17.73us.
|
||||
for (uint16_t i = 5000; i > 0; i--) {
|
||||
// DivIrqReg[7..0] bits are: Set2 reserved reserved MfinActIRq reserved CRCIRq reserved reserved
|
||||
uint8_t n = pcd_read_register_(DIV_IRQ_REG);
|
||||
if (n & 0x04) { // CRCIRq bit set - calculation done
|
||||
pcd_write_register_(COMMAND_REG, PCD_IDLE); // Stop calculating CRC for new content in the FIFO.
|
||||
// Transfer the result from the registers to the result buffer
|
||||
result[0] = pcd_read_register_(CRC_RESULT_REG_L);
|
||||
result[1] = pcd_read_register_(CRC_RESULT_REG_H);
|
||||
|
||||
ESP_LOGVV(TAG, "pcd_calculate_crc_() STATUS_OK");
|
||||
return STATUS_OK;
|
||||
}
|
||||
}
|
||||
ESP_LOGVV(TAG, "pcd_calculate_crc_() TIMEOUT");
|
||||
// 89ms passed and nothing happend. Communication with the MFRC522 might be down.
|
||||
return STATUS_TIMEOUT;
|
||||
}
|
||||
/**
|
||||
* Returns STATUS_OK if a PICC responds to PICC_CMD_REQA.
|
||||
* Only "new" cards in state IDLE are invited. Sleeping cards in state HALT are ignored.
|
||||
*
|
||||
* @return STATUS_OK on success, STATUS_??? otherwise.
|
||||
*/
|
||||
|
||||
RC522::StatusCode RC522::picc_is_new_card_present_() {
|
||||
uint8_t buffer_atqa[2];
|
||||
uint8_t buffer_size = sizeof(buffer_atqa);
|
||||
|
||||
// Reset baud rates
|
||||
pcd_write_register_(TX_MODE_REG, 0x00);
|
||||
pcd_write_register_(RX_MODE_REG, 0x00);
|
||||
// Reset ModWidthReg
|
||||
pcd_write_register_(MOD_WIDTH_REG, 0x26);
|
||||
|
||||
auto result = picc_request_a_(buffer_atqa, &buffer_size);
|
||||
|
||||
ESP_LOGV(TAG, "picc_is_new_card_present_() -> %d", result);
|
||||
return result;
|
||||
}
|
||||
|
||||
/**
|
||||
* Simple wrapper around PICC_Select.
|
||||
* Returns true if a UID could be read.
|
||||
* Remember to call PICC_IsNewCardPresent(), PICC_RequestA() or PICC_WakeupA() first.
|
||||
* The read UID is available in the class variable uid.
|
||||
*
|
||||
* @return bool
|
||||
*/
|
||||
bool RC522::picc_read_card_serial_() {
|
||||
RC522::StatusCode result = picc_select_(&this->uid_);
|
||||
ESP_LOGVV(TAG, "picc_select_(...) -> %d", result);
|
||||
return (result == STATUS_OK);
|
||||
}
|
||||
|
||||
/**
|
||||
* Transmits SELECT/ANTICOLLISION commands to select a single PICC.
|
||||
* Before calling this function the PICCs must be placed in the READY(*) state by calling PICC_RequestA() or
|
||||
* PICC_WakeupA(). On success:
|
||||
* - The chosen PICC is in state ACTIVE(*) and all other PICCs have returned to state IDLE/HALT. (Figure 7 of the
|
||||
* ISO/IEC 14443-3 draft.)
|
||||
* - The UID size and value of the chosen PICC is returned in *uid along with the SAK.
|
||||
*
|
||||
* A PICC UID consists of 4, 7 or 10 uint8_ts.
|
||||
* Only 4 uint8_ts can be specified in a SELECT command, so for the longer UIDs two or three iterations are used:
|
||||
* UID size Number of UID uint8_ts Cascade levels Example of PICC
|
||||
* ======== =================== ============== ===============
|
||||
* single 4 1 MIFARE Classic
|
||||
* double 7 2 MIFARE Ultralight
|
||||
* triple 10 3 Not currently in use?
|
||||
*
|
||||
* @return STATUS_OK on success, STATUS_??? otherwise.
|
||||
*/
|
||||
RC522::StatusCode RC522::picc_select_(
|
||||
Uid *uid, ///< Pointer to Uid struct. Normally output, but can also be used to supply a known UID.
|
||||
uint8_t valid_bits ///< The number of known UID bits supplied in *uid. Normally 0. If set you must also supply
|
||||
///< uid->size.
|
||||
) {
|
||||
bool uid_complete;
|
||||
bool select_done;
|
||||
bool use_cascade_tag;
|
||||
uint8_t cascade_level = 1;
|
||||
RC522::StatusCode result;
|
||||
uint8_t count;
|
||||
uint8_t check_bit;
|
||||
uint8_t index;
|
||||
uint8_t uid_index; // The first index in uid->uiduint8_t[] that is used in the current Cascade Level.
|
||||
int8_t current_level_known_bits; // The number of known UID bits in the current Cascade Level.
|
||||
uint8_t buffer[9]; // The SELECT/ANTICOLLISION commands uses a 7 uint8_t standard frame + 2 uint8_ts CRC_A
|
||||
uint8_t buffer_used; // The number of uint8_ts used in the buffer, ie the number of uint8_ts to transfer to the FIFO.
|
||||
uint8_t rx_align; // Used in BitFramingReg. Defines the bit position for the first bit received.
|
||||
uint8_t tx_last_bits; // Used in BitFramingReg. The number of valid bits in the last transmitted uint8_t.
|
||||
uint8_t *response_buffer;
|
||||
uint8_t response_length;
|
||||
|
||||
// Description of buffer structure:
|
||||
// uint8_t 0: SEL Indicates the Cascade Level: PICC_CMD_SEL_CL1, PICC_CMD_SEL_CL2 or PICC_CMD_SEL_CL3
|
||||
// uint8_t 1: NVB Number of Valid Bits (in complete command, not just the UID): High nibble: complete
|
||||
// uint8_ts,
|
||||
// Low nibble: Extra bits. uint8_t 2: UID-data or CT See explanation below. CT means Cascade Tag. uint8_t
|
||||
// 3: UID-data uint8_t 4: UID-data uint8_t 5: UID-data uint8_t 6: BCC Block Check Character - XOR of
|
||||
// uint8_ts 2-5 uint8_t 7: CRC_A uint8_t 8: CRC_A The BCC and CRC_A are only transmitted if we know all the UID bits
|
||||
// of the current Cascade Level.
|
||||
//
|
||||
// Description of uint8_ts 2-5: (Section 6.5.4 of the ISO/IEC 14443-3 draft: UID contents and cascade levels)
|
||||
// UID size Cascade level uint8_t2 uint8_t3 uint8_t4 uint8_t5
|
||||
// ======== ============= ===== ===== ===== =====
|
||||
// 4 uint8_ts 1 uid0 uid1 uid2 uid3
|
||||
// 7 uint8_ts 1 CT uid0 uid1 uid2
|
||||
// 2 uid3 uid4 uid5 uid6
|
||||
// 10 uint8_ts 1 CT uid0 uid1 uid2
|
||||
// 2 CT uid3 uid4 uid5
|
||||
// 3 uid6 uid7 uid8 uid9
|
||||
|
||||
// Sanity checks
|
||||
if (valid_bits > 80) {
|
||||
return STATUS_INVALID;
|
||||
}
|
||||
|
||||
ESP_LOGVV(TAG, "picc_select_(&, %d)", valid_bits);
|
||||
|
||||
// Prepare MFRC522
|
||||
pcd_clear_register_bit_mask_(COLL_REG, 0x80); // ValuesAfterColl=1 => Bits received after collision are cleared.
|
||||
|
||||
// Repeat Cascade Level loop until we have a complete UID.
|
||||
uid_complete = false;
|
||||
while (!uid_complete) {
|
||||
// Set the Cascade Level in the SEL uint8_t, find out if we need to use the Cascade Tag in uint8_t 2.
|
||||
switch (cascade_level) {
|
||||
case 1:
|
||||
buffer[0] = PICC_CMD_SEL_CL1;
|
||||
uid_index = 0;
|
||||
use_cascade_tag = valid_bits && uid->size > 4; // When we know that the UID has more than 4 uint8_ts
|
||||
break;
|
||||
|
||||
case 2:
|
||||
buffer[0] = PICC_CMD_SEL_CL2;
|
||||
uid_index = 3;
|
||||
use_cascade_tag = valid_bits && uid->size > 7; // When we know that the UID has more than 7 uint8_ts
|
||||
break;
|
||||
|
||||
case 3:
|
||||
buffer[0] = PICC_CMD_SEL_CL3;
|
||||
uid_index = 6;
|
||||
use_cascade_tag = false; // Never used in CL3.
|
||||
break;
|
||||
|
||||
default:
|
||||
return STATUS_INTERNAL_ERROR;
|
||||
break;
|
||||
}
|
||||
|
||||
// How many UID bits are known in this Cascade Level?
|
||||
current_level_known_bits = valid_bits - (8 * uid_index);
|
||||
if (current_level_known_bits < 0) {
|
||||
current_level_known_bits = 0;
|
||||
}
|
||||
// Copy the known bits from uid->uiduint8_t[] to buffer[]
|
||||
index = 2; // destination index in buffer[]
|
||||
if (use_cascade_tag) {
|
||||
buffer[index++] = PICC_CMD_CT;
|
||||
}
|
||||
uint8_t uint8_ts_to_copy = current_level_known_bits / 8 +
|
||||
(current_level_known_bits % 8
|
||||
? 1
|
||||
: 0); // The number of uint8_ts needed to represent the known bits for this level.
|
||||
if (uint8_ts_to_copy) {
|
||||
uint8_t maxuint8_ts =
|
||||
use_cascade_tag ? 3 : 4; // Max 4 uint8_ts in each Cascade Level. Only 3 left if we use the Cascade Tag
|
||||
if (uint8_ts_to_copy > maxuint8_ts) {
|
||||
uint8_ts_to_copy = maxuint8_ts;
|
||||
}
|
||||
for (count = 0; count < uint8_ts_to_copy; count++) {
|
||||
buffer[index++] = uid->uiduint8_t[uid_index + count];
|
||||
}
|
||||
}
|
||||
// Now that the data has been copied we need to include the 8 bits in CT in currentLevelKnownBits
|
||||
if (use_cascade_tag) {
|
||||
current_level_known_bits += 8;
|
||||
}
|
||||
|
||||
// Repeat anti collision loop until we can transmit all UID bits + BCC and receive a SAK - max 32 iterations.
|
||||
select_done = false;
|
||||
while (!select_done) {
|
||||
// Find out how many bits and uint8_ts to send and receive.
|
||||
if (current_level_known_bits >= 32) { // All UID bits in this Cascade Level are known. This is a SELECT.
|
||||
|
||||
if (response_length < 4) {
|
||||
ESP_LOGW(TAG, "Not enough data received.");
|
||||
return STATUS_INVALID;
|
||||
}
|
||||
|
||||
// Serial.print(F("SELECT: currentLevelKnownBits=")); Serial.println(currentLevelKnownBits, DEC);
|
||||
buffer[1] = 0x70; // NVB - Number of Valid Bits: Seven whole uint8_ts
|
||||
// Calculate BCC - Block Check Character
|
||||
buffer[6] = buffer[2] ^ buffer[3] ^ buffer[4] ^ buffer[5];
|
||||
// Calculate CRC_A
|
||||
result = pcd_calculate_crc_(buffer, 7, &buffer[7]);
|
||||
if (result != STATUS_OK) {
|
||||
return result;
|
||||
}
|
||||
tx_last_bits = 0; // 0 => All 8 bits are valid.
|
||||
buffer_used = 9;
|
||||
// Store response in the last 3 uint8_ts of buffer (BCC and CRC_A - not needed after tx)
|
||||
response_buffer = &buffer[6];
|
||||
response_length = 3;
|
||||
} else { // This is an ANTICOLLISION.
|
||||
// Serial.print(F("ANTICOLLISION: currentLevelKnownBits=")); Serial.println(currentLevelKnownBits, DEC);
|
||||
tx_last_bits = current_level_known_bits % 8;
|
||||
count = current_level_known_bits / 8; // Number of whole uint8_ts in the UID part.
|
||||
index = 2 + count; // Number of whole uint8_ts: SEL + NVB + UIDs
|
||||
buffer[1] = (index << 4) + tx_last_bits; // NVB - Number of Valid Bits
|
||||
buffer_used = index + (tx_last_bits ? 1 : 0);
|
||||
// Store response in the unused part of buffer
|
||||
response_buffer = &buffer[index];
|
||||
response_length = sizeof(buffer) - index;
|
||||
}
|
||||
|
||||
// Set bit adjustments
|
||||
rx_align = tx_last_bits; // Having a separate variable is overkill. But it makes the next line easier to read.
|
||||
pcd_write_register_(
|
||||
BIT_FRAMING_REG,
|
||||
(rx_align << 4) + tx_last_bits); // RxAlign = BitFramingReg[6..4]. TxLastBits = BitFramingReg[2..0]
|
||||
|
||||
// Transmit the buffer and receive the response.
|
||||
result = pcd_transceive_data_(buffer, buffer_used, response_buffer, &response_length, &tx_last_bits, rx_align);
|
||||
if (result == STATUS_COLLISION) { // More than one PICC in the field => collision.
|
||||
uint8_t value_of_coll_reg = pcd_read_register_(
|
||||
COLL_REG); // CollReg[7..0] bits are: ValuesAfterColl reserved CollPosNotValid CollPos[4:0]
|
||||
if (value_of_coll_reg & 0x20) { // CollPosNotValid
|
||||
return STATUS_COLLISION; // Without a valid collision position we cannot continue
|
||||
}
|
||||
uint8_t collision_pos = value_of_coll_reg & 0x1F; // Values 0-31, 0 means bit 32.
|
||||
if (collision_pos == 0) {
|
||||
collision_pos = 32;
|
||||
}
|
||||
if (collision_pos <= current_level_known_bits) { // No progress - should not happen
|
||||
return STATUS_INTERNAL_ERROR;
|
||||
}
|
||||
// Choose the PICC with the bit set.
|
||||
current_level_known_bits = collision_pos;
|
||||
count = current_level_known_bits % 8; // The bit to modify
|
||||
check_bit = (current_level_known_bits - 1) % 8;
|
||||
index = 1 + (current_level_known_bits / 8) + (count ? 1 : 0); // First uint8_t is index 0.
|
||||
if (response_length > 2) // Note: Otherwise buffer[index] might be not initialized
|
||||
buffer[index] |= (1 << check_bit);
|
||||
} else if (result != STATUS_OK) {
|
||||
return result;
|
||||
} else { // STATUS_OK
|
||||
if (current_level_known_bits >= 32) { // This was a SELECT.
|
||||
select_done = true; // No more anticollision
|
||||
// We continue below outside the while.
|
||||
} else { // This was an ANTICOLLISION.
|
||||
// We now have all 32 bits of the UID in this Cascade Level
|
||||
current_level_known_bits = 32;
|
||||
// Run loop again to do the SELECT.
|
||||
}
|
||||
}
|
||||
} // End of while (!selectDone)
|
||||
|
||||
// We do not check the CBB - it was constructed by us above.
|
||||
|
||||
// Copy the found UID uint8_ts from buffer[] to uid->uiduint8_t[]
|
||||
index = (buffer[2] == PICC_CMD_CT) ? 3 : 2; // source index in buffer[]
|
||||
uint8_ts_to_copy = (buffer[2] == PICC_CMD_CT) ? 3 : 4;
|
||||
for (count = 0; count < uint8_ts_to_copy; count++) {
|
||||
uid->uiduint8_t[uid_index + count] = buffer[index++];
|
||||
}
|
||||
|
||||
// Check response SAK (Select Acknowledge)
|
||||
if (response_length != 3 || tx_last_bits != 0) { // SAK must be exactly 24 bits (1 uint8_t + CRC_A).
|
||||
return STATUS_ERROR;
|
||||
}
|
||||
// Verify CRC_A - do our own calculation and store the control in buffer[2..3] - those uint8_ts are not needed
|
||||
// anymore.
|
||||
result = pcd_calculate_crc_(response_buffer, 1, &buffer[2]);
|
||||
if (result != STATUS_OK) {
|
||||
return result;
|
||||
}
|
||||
if ((buffer[2] != response_buffer[1]) || (buffer[3] != response_buffer[2])) {
|
||||
return STATUS_CRC_WRONG;
|
||||
}
|
||||
if (response_buffer[0] & 0x04) { // Cascade bit set - UID not complete yes
|
||||
cascade_level++;
|
||||
} else {
|
||||
uid_complete = true;
|
||||
uid->sak = response_buffer[0];
|
||||
}
|
||||
} // End of while (!uidComplete)
|
||||
|
||||
// Set correct uid->size
|
||||
uid->size = 3 * cascade_level + 1;
|
||||
|
||||
return STATUS_OK;
|
||||
}
|
||||
|
||||
bool RC522BinarySensor::process(const uint8_t *data, uint8_t len) {
|
||||
if (len != this->uid_.size())
|
||||
return false;
|
||||
|
||||
for (uint8_t i = 0; i < len; i++) {
|
||||
if (data[i] != this->uid_[i])
|
||||
return false;
|
||||
}
|
||||
|
||||
this->publish_state(true);
|
||||
this->found_ = true;
|
||||
return true;
|
||||
}
|
||||
void RC522Trigger::process(const uint8_t *uid, uint8_t uid_length) {
|
||||
char buf[32];
|
||||
format_uid(buf, uid, uid_length);
|
||||
this->trigger(std::string(buf));
|
||||
}
|
||||
|
||||
} // namespace rc522_spi
|
||||
} // namespace esphome
|
||||
|
||||
@@ -10,292 +10,46 @@
|
||||
#pragma once
|
||||
|
||||
#include "esphome/core/component.h"
|
||||
#include "esphome/core/automation.h"
|
||||
#include "esphome/components/binary_sensor/binary_sensor.h"
|
||||
#include "esphome/components/rc522/rc522.h"
|
||||
#include "esphome/components/spi/spi.h"
|
||||
|
||||
namespace esphome {
|
||||
namespace rc522_spi {
|
||||
|
||||
class RC522BinarySensor;
|
||||
class RC522Trigger;
|
||||
|
||||
class RC522 : public PollingComponent,
|
||||
public spi::SPIDevice<spi::BIT_ORDER_MSB_FIRST, spi::CLOCK_POLARITY_LOW, spi::CLOCK_PHASE_LEADING,
|
||||
spi::DATA_RATE_4MHZ> {
|
||||
class RC522Spi : public rc522::RC522,
|
||||
public spi::SPIDevice<spi::BIT_ORDER_MSB_FIRST, spi::CLOCK_POLARITY_LOW, spi::CLOCK_PHASE_LEADING,
|
||||
spi::DATA_RATE_4MHZ> {
|
||||
public:
|
||||
void setup() override;
|
||||
|
||||
void dump_config() override;
|
||||
|
||||
void update() override;
|
||||
float get_setup_priority() const override { return setup_priority::DATA; };
|
||||
|
||||
void loop() override;
|
||||
|
||||
void register_tag(RC522BinarySensor *tag) { this->binary_sensors_.push_back(tag); }
|
||||
void register_trigger(RC522Trigger *trig) { this->triggers_.push_back(trig); }
|
||||
|
||||
void set_reset_pin(GPIOPin *reset) { this->reset_pin_ = reset; }
|
||||
|
||||
protected:
|
||||
enum PcdRegister : uint8_t {
|
||||
// Page 0: Command and status
|
||||
// 0x00 // reserved for future use
|
||||
COMMAND_REG = 0x01 << 1, // starts and stops command execution
|
||||
COM_I_EN_REG = 0x02 << 1, // enable and disable interrupt request control bits
|
||||
DIV_I_EN_REG = 0x03 << 1, // enable and disable interrupt request control bits
|
||||
COM_IRQ_REG = 0x04 << 1, // interrupt request bits
|
||||
DIV_IRQ_REG = 0x05 << 1, // interrupt request bits
|
||||
ERROR_REG = 0x06 << 1, // error bits showing the error status of the last command executed
|
||||
STATUS1_REG = 0x07 << 1, // communication status bits
|
||||
STATUS2_REG = 0x08 << 1, // receiver and transmitter status bits
|
||||
FIFO_DATA_REG = 0x09 << 1, // input and output of 64 uint8_t FIFO buffer
|
||||
FIFO_LEVEL_REG = 0x0A << 1, // number of uint8_ts stored in the FIFO buffer
|
||||
WATER_LEVEL_REG = 0x0B << 1, // level for FIFO underflow and overflow warning
|
||||
CONTROL_REG = 0x0C << 1, // miscellaneous control registers
|
||||
BIT_FRAMING_REG = 0x0D << 1, // adjustments for bit-oriented frames
|
||||
COLL_REG = 0x0E << 1, // bit position of the first bit-collision detected on the RF interface
|
||||
// 0x0F // reserved for future use
|
||||
|
||||
// Page 1: Command
|
||||
// 0x10 // reserved for future use
|
||||
MODE_REG = 0x11 << 1, // defines general modes for transmitting and receiving
|
||||
TX_MODE_REG = 0x12 << 1, // defines transmission data rate and framing
|
||||
RX_MODE_REG = 0x13 << 1, // defines reception data rate and framing
|
||||
TX_CONTROL_REG = 0x14 << 1, // controls the logical behavior of the antenna driver pins TX1 and TX2
|
||||
TX_ASK_REG = 0x15 << 1, // controls the setting of the transmission modulation
|
||||
TX_SEL_REG = 0x16 << 1, // selects the internal sources for the antenna driver
|
||||
RX_SEL_REG = 0x17 << 1, // selects internal receiver settings
|
||||
RX_THRESHOLD_REG = 0x18 << 1, // selects thresholds for the bit decoder
|
||||
DEMOD_REG = 0x19 << 1, // defines demodulator settings
|
||||
// 0x1A // reserved for future use
|
||||
// 0x1B // reserved for future use
|
||||
MF_TX_REG = 0x1C << 1, // controls some MIFARE communication transmit parameters
|
||||
MF_RX_REG = 0x1D << 1, // controls some MIFARE communication receive parameters
|
||||
// 0x1E // reserved for future use
|
||||
SERIAL_SPEED_REG = 0x1F << 1, // selects the speed of the serial UART interface
|
||||
|
||||
// Page 2: Configuration
|
||||
// 0x20 // reserved for future use
|
||||
CRC_RESULT_REG_H = 0x21 << 1, // shows the MSB and LSB values of the CRC calculation
|
||||
CRC_RESULT_REG_L = 0x22 << 1,
|
||||
// 0x23 // reserved for future use
|
||||
MOD_WIDTH_REG = 0x24 << 1, // controls the ModWidth setting?
|
||||
// 0x25 // reserved for future use
|
||||
RF_CFG_REG = 0x26 << 1, // configures the receiver gain
|
||||
GS_N_REG = 0x27 << 1, // selects the conductance of the antenna driver pins TX1 and TX2 for modulation
|
||||
CW_GS_P_REG = 0x28 << 1, // defines the conductance of the p-driver output during periods of no modulation
|
||||
MOD_GS_P_REG = 0x29 << 1, // defines the conductance of the p-driver output during periods of modulation
|
||||
T_MODE_REG = 0x2A << 1, // defines settings for the internal timer
|
||||
T_PRESCALER_REG = 0x2B << 1, // the lower 8 bits of the TPrescaler value. The 4 high bits are in TModeReg.
|
||||
T_RELOAD_REG_H = 0x2C << 1, // defines the 16-bit timer reload value
|
||||
T_RELOAD_REG_L = 0x2D << 1,
|
||||
T_COUNTER_VALUE_REG_H = 0x2E << 1, // shows the 16-bit timer value
|
||||
T_COUNTER_VALUE_REG_L = 0x2F << 1,
|
||||
|
||||
// Page 3: Test Registers
|
||||
// 0x30 // reserved for future use
|
||||
TEST_SEL1_REG = 0x31 << 1, // general test signal configuration
|
||||
TEST_SEL2_REG = 0x32 << 1, // general test signal configuration
|
||||
TEST_PIN_EN_REG = 0x33 << 1, // enables pin output driver on pins D1 to D7
|
||||
TEST_PIN_VALUE_REG = 0x34 << 1, // defines the values for D1 to D7 when it is used as an I/O bus
|
||||
TEST_BUS_REG = 0x35 << 1, // shows the status of the internal test bus
|
||||
AUTO_TEST_REG = 0x36 << 1, // controls the digital self-test
|
||||
VERSION_REG = 0x37 << 1, // shows the software version
|
||||
ANALOG_TEST_REG = 0x38 << 1, // controls the pins AUX1 and AUX2
|
||||
TEST_DA_C1_REG = 0x39 << 1, // defines the test value for TestDAC1
|
||||
TEST_DA_C2_REG = 0x3A << 1, // defines the test value for TestDAC2
|
||||
TEST_ADC_REG = 0x3B << 1 // shows the value of ADC I and Q channels
|
||||
// 0x3C // reserved for production tests
|
||||
// 0x3D // reserved for production tests
|
||||
// 0x3E // reserved for production tests
|
||||
// 0x3F // reserved for production tests
|
||||
};
|
||||
|
||||
// MFRC522 commands. Described in chapter 10 of the datasheet.
|
||||
enum PcdCommand : uint8_t {
|
||||
PCD_IDLE = 0x00, // no action, cancels current command execution
|
||||
PCD_MEM = 0x01, // stores 25 uint8_ts into the internal buffer
|
||||
PCD_GENERATE_RANDOM_ID = 0x02, // generates a 10-uint8_t random ID number
|
||||
PCD_CALC_CRC = 0x03, // activates the CRC coprocessor or performs a self-test
|
||||
PCD_TRANSMIT = 0x04, // transmits data from the FIFO buffer
|
||||
PCD_NO_CMD_CHANGE = 0x07, // no command change, can be used to modify the CommandReg register bits without
|
||||
// affecting the command, for example, the PowerDown bit
|
||||
PCD_RECEIVE = 0x08, // activates the receiver circuits
|
||||
PCD_TRANSCEIVE =
|
||||
0x0C, // transmits data from FIFO buffer to antenna and automatically activates the receiver after transmission
|
||||
PCD_MF_AUTHENT = 0x0E, // performs the MIFARE standard authentication as a reader
|
||||
PCD_SOFT_RESET = 0x0F // resets the MFRC522
|
||||
};
|
||||
|
||||
// Commands sent to the PICC.
|
||||
enum PiccCommand : uint8_t {
|
||||
// The commands used by the PCD to manage communication with several PICCs (ISO 14443-3, Type A, section 6.4)
|
||||
PICC_CMD_REQA = 0x26, // REQuest command, Type A. Invites PICCs in state IDLE to go to READY and prepare for
|
||||
// anticollision or selection. 7 bit frame.
|
||||
PICC_CMD_WUPA = 0x52, // Wake-UP command, Type A. Invites PICCs in state IDLE and HALT to go to READY(*) and
|
||||
// prepare for anticollision or selection. 7 bit frame.
|
||||
PICC_CMD_CT = 0x88, // Cascade Tag. Not really a command, but used during anti collision.
|
||||
PICC_CMD_SEL_CL1 = 0x93, // Anti collision/Select, Cascade Level 1
|
||||
PICC_CMD_SEL_CL2 = 0x95, // Anti collision/Select, Cascade Level 2
|
||||
PICC_CMD_SEL_CL3 = 0x97, // Anti collision/Select, Cascade Level 3
|
||||
PICC_CMD_HLTA = 0x50, // HaLT command, Type A. Instructs an ACTIVE PICC to go to state HALT.
|
||||
PICC_CMD_RATS = 0xE0, // Request command for Answer To Reset.
|
||||
// The commands used for MIFARE Classic (from http://www.mouser.com/ds/2/302/MF1S503x-89574.pdf, Section 9)
|
||||
// Use PCD_MFAuthent to authenticate access to a sector, then use these commands to read/write/modify the blocks on
|
||||
// the sector.
|
||||
// The read/write commands can also be used for MIFARE Ultralight.
|
||||
PICC_CMD_MF_AUTH_KEY_A = 0x60, // Perform authentication with Key A
|
||||
PICC_CMD_MF_AUTH_KEY_B = 0x61, // Perform authentication with Key B
|
||||
PICC_CMD_MF_READ =
|
||||
0x30, // Reads one 16 uint8_t block from the authenticated sector of the PICC. Also used for MIFARE Ultralight.
|
||||
PICC_CMD_MF_WRITE = 0xA0, // Writes one 16 uint8_t block to the authenticated sector of the PICC. Called
|
||||
// "COMPATIBILITY WRITE" for MIFARE Ultralight.
|
||||
PICC_CMD_MF_DECREMENT =
|
||||
0xC0, // Decrements the contents of a block and stores the result in the internal data register.
|
||||
PICC_CMD_MF_INCREMENT =
|
||||
0xC1, // Increments the contents of a block and stores the result in the internal data register.
|
||||
PICC_CMD_MF_RESTORE = 0xC2, // Reads the contents of a block into the internal data register.
|
||||
PICC_CMD_MF_TRANSFER = 0xB0, // Writes the contents of the internal data register to a block.
|
||||
// The commands used for MIFARE Ultralight (from http://www.nxp.com/documents/data_sheet/MF0ICU1.pdf, Section 8.6)
|
||||
// The PICC_CMD_MF_READ and PICC_CMD_MF_WRITE can also be used for MIFARE Ultralight.
|
||||
PICC_CMD_UL_WRITE = 0xA2 // Writes one 4 uint8_t page to the PICC.
|
||||
};
|
||||
|
||||
// Return codes from the functions in this class. Remember to update GetStatusCodeName() if you add more.
|
||||
// last value set to 0xff, then compiler uses less ram, it seems some optimisations are triggered
|
||||
enum StatusCode : uint8_t {
|
||||
STATUS_OK, // Success
|
||||
STATUS_ERROR, // Error in communication
|
||||
STATUS_COLLISION, // Collission detected
|
||||
STATUS_TIMEOUT, // Timeout in communication.
|
||||
STATUS_NO_ROOM, // A buffer is not big enough.
|
||||
STATUS_INTERNAL_ERROR, // Internal error in the code. Should not happen ;-)
|
||||
STATUS_INVALID, // Invalid argument.
|
||||
STATUS_CRC_WRONG, // The CRC_A does not match
|
||||
STATUS_MIFARE_NACK = 0xff // A MIFARE PICC responded with NAK.
|
||||
};
|
||||
|
||||
// A struct used for passing the UID of a PICC.
|
||||
using Uid = struct {
|
||||
uint8_t size; // Number of uint8_ts in the UID. 4, 7 or 10.
|
||||
uint8_t uiduint8_t[10];
|
||||
uint8_t sak; // The SAK (Select acknowledge) uint8_t returned from the PICC after successful selection.
|
||||
};
|
||||
|
||||
Uid uid_;
|
||||
uint32_t update_wait_{0};
|
||||
|
||||
void pcd_reset_();
|
||||
void initialize_();
|
||||
void pcd_antenna_on_();
|
||||
uint8_t pcd_read_register_(PcdRegister reg ///< The register to read from. One of the PCD_Register enums.
|
||||
);
|
||||
uint8_t pcd_read_register(PcdRegister reg ///< The register to read from. One of the PCD_Register enums.
|
||||
) override;
|
||||
|
||||
/**
|
||||
* Reads a number of uint8_ts from the specified register in the MFRC522 chip.
|
||||
* The interface is described in the datasheet section 8.1.2.
|
||||
*/
|
||||
void pcd_read_register_(PcdRegister reg, ///< The register to read from. One of the PCD_Register enums.
|
||||
uint8_t count, ///< The number of uint8_ts to read
|
||||
uint8_t *values, ///< uint8_t array to store the values in.
|
||||
uint8_t rx_align ///< Only bit positions rxAlign..7 in values[0] are updated.
|
||||
);
|
||||
void pcd_write_register_(PcdRegister reg, ///< The register to write to. One of the PCD_Register enums.
|
||||
uint8_t value ///< The value to write.
|
||||
);
|
||||
void pcd_read_register(PcdRegister reg, ///< The register to read from. One of the PCD_Register enums.
|
||||
uint8_t count, ///< The number of uint8_ts to read
|
||||
uint8_t *values, ///< uint8_t array to store the values in.
|
||||
uint8_t rx_align ///< Only bit positions rxAlign..7 in values[0] are updated.
|
||||
) override;
|
||||
void pcd_write_register(PcdRegister reg, ///< The register to write to. One of the PCD_Register enums.
|
||||
uint8_t value ///< The value to write.
|
||||
) override;
|
||||
|
||||
/**
|
||||
* Writes a number of uint8_ts to the specified register in the MFRC522 chip.
|
||||
* The interface is described in the datasheet section 8.1.2.
|
||||
*/
|
||||
void pcd_write_register_(PcdRegister reg, ///< The register to write to. One of the PCD_Register enums.
|
||||
uint8_t count, ///< The number of uint8_ts to write to the register
|
||||
uint8_t *values ///< The values to write. uint8_t array.
|
||||
);
|
||||
|
||||
StatusCode picc_request_a_(
|
||||
uint8_t *buffer_atqa, ///< The buffer to store the ATQA (Answer to request) in
|
||||
uint8_t *buffer_size ///< Buffer size, at least two uint8_ts. Also number of uint8_ts returned if STATUS_OK.
|
||||
);
|
||||
StatusCode picc_reqa_or_wupa_(
|
||||
uint8_t command, ///< The command to send - PICC_CMD_REQA or PICC_CMD_WUPA
|
||||
uint8_t *buffer_atqa, ///< The buffer to store the ATQA (Answer to request) in
|
||||
uint8_t *buffer_size ///< Buffer size, at least two uint8_ts. Also number of uint8_ts returned if STATUS_OK.
|
||||
);
|
||||
void pcd_set_register_bit_mask_(PcdRegister reg, ///< The register to update. One of the PCD_Register enums.
|
||||
uint8_t mask ///< The bits to set.
|
||||
);
|
||||
void pcd_clear_register_bit_mask_(PcdRegister reg, ///< The register to update. One of the PCD_Register enums.
|
||||
uint8_t mask ///< The bits to clear.
|
||||
);
|
||||
|
||||
StatusCode pcd_transceive_data_(uint8_t *send_data, uint8_t send_len, uint8_t *back_data, uint8_t *back_len,
|
||||
uint8_t *valid_bits = nullptr, uint8_t rx_align = 0, bool check_crc = false);
|
||||
StatusCode pcd_communicate_with_picc_(uint8_t command, uint8_t wait_i_rq, uint8_t *send_data, uint8_t send_len,
|
||||
uint8_t *back_data = nullptr, uint8_t *back_len = nullptr,
|
||||
uint8_t *valid_bits = nullptr, uint8_t rx_align = 0, bool check_crc = false);
|
||||
StatusCode pcd_calculate_crc_(
|
||||
uint8_t *data, ///< In: Pointer to the data to transfer to the FIFO for CRC calculation.
|
||||
uint8_t length, ///< In: The number of uint8_ts to transfer.
|
||||
uint8_t *result ///< Out: Pointer to result buffer. Result is written to result[0..1], low uint8_t first.
|
||||
);
|
||||
RC522::StatusCode picc_is_new_card_present_();
|
||||
bool picc_read_card_serial_();
|
||||
StatusCode picc_select_(
|
||||
Uid *uid, ///< Pointer to Uid struct. Normally output, but can also be used to supply a known UID.
|
||||
uint8_t valid_bits = 0 ///< The number of known UID bits supplied in *uid. Normally 0. If set you must also
|
||||
///< supply uid->size.
|
||||
);
|
||||
|
||||
/** Read a data frame from the RC522 and return the result as a vector.
|
||||
*
|
||||
* Note that is_ready needs to be checked first before requesting this method.
|
||||
*
|
||||
* On failure, an empty vector is returned.
|
||||
*/
|
||||
std::vector<uint8_t> r_c522_read_data_();
|
||||
|
||||
GPIOPin *reset_pin_{nullptr};
|
||||
uint8_t reset_count_{0};
|
||||
uint32_t reset_timeout_{0};
|
||||
bool initialize_pending_{false};
|
||||
std::vector<RC522BinarySensor *> binary_sensors_;
|
||||
std::vector<RC522Trigger *> triggers_;
|
||||
|
||||
enum RC522Error {
|
||||
NONE = 0,
|
||||
RESET_FAILED,
|
||||
} error_code_{NONE};
|
||||
void pcd_write_register(PcdRegister reg, ///< The register to write to. One of the PCD_Register enums.
|
||||
uint8_t count, ///< The number of uint8_ts to write to the register
|
||||
uint8_t *values ///< The values to write. uint8_t array.
|
||||
) override;
|
||||
};
|
||||
|
||||
class RC522BinarySensor : public binary_sensor::BinarySensor {
|
||||
public:
|
||||
void set_uid(const std::vector<uint8_t> &uid) { uid_ = uid; }
|
||||
|
||||
bool process(const uint8_t *data, uint8_t len);
|
||||
|
||||
void on_scan_end() {
|
||||
if (!this->found_) {
|
||||
this->publish_state(false);
|
||||
}
|
||||
this->found_ = false;
|
||||
}
|
||||
|
||||
protected:
|
||||
std::vector<uint8_t> uid_;
|
||||
bool found_{false};
|
||||
};
|
||||
|
||||
class RC522Trigger : public Trigger<std::string> {
|
||||
public:
|
||||
void process(const uint8_t *uid, uint8_t uid_length);
|
||||
};
|
||||
|
||||
#ifndef MFRC522_SPICLOCK
|
||||
#define MFRC522_SPICLOCK SPI_CLOCK_DIV4 // MFRC522 accept upto 10MHz
|
||||
#endif
|
||||
|
||||
} // namespace rc522_spi
|
||||
} // namespace esphome
|
||||
|
||||
Reference in New Issue
Block a user