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https://github.com/esphome/esphome.git
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123 lines
3.9 KiB
C++
123 lines
3.9 KiB
C++
#include "bl0942.h"
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#include "esphome/core/log.h"
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#include <cinttypes>
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namespace esphome {
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namespace bl0942 {
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static const char *const TAG = "bl0942";
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static const uint8_t BL0942_READ_COMMAND = 0x58;
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static const uint8_t BL0942_FULL_PACKET = 0xAA;
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static const uint8_t BL0942_PACKET_HEADER = 0x55;
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static const uint8_t BL0942_WRITE_COMMAND = 0xA8;
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static const uint8_t BL0942_REG_I_FAST_RMS_CTRL = 0x10;
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static const uint8_t BL0942_REG_MODE = 0x18;
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static const uint8_t BL0942_REG_SOFT_RESET = 0x19;
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static const uint8_t BL0942_REG_USR_WRPROT = 0x1A;
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static const uint8_t BL0942_REG_TPS_CTRL = 0x1B;
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// TODO: Confirm insialisation works as intended
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const uint8_t BL0942_INIT[5][6] = {
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// Reset to default
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{BL0942_WRITE_COMMAND, BL0942_REG_SOFT_RESET, 0x5A, 0x5A, 0x5A, 0x38},
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// Enable User Operation Write
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{BL0942_WRITE_COMMAND, BL0942_REG_USR_WRPROT, 0x55, 0x00, 0x00, 0xF0},
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// 0x0100 = CF_UNABLE energy pulse, AC_FREQ_SEL 50Hz, RMS_UPDATE_SEL 800mS
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{BL0942_WRITE_COMMAND, BL0942_REG_MODE, 0x00, 0x10, 0x00, 0x37},
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// 0x47FF = Over-current and leakage alarm on, Automatic temperature measurement, Interval 100mS
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{BL0942_WRITE_COMMAND, BL0942_REG_TPS_CTRL, 0xFF, 0x47, 0x00, 0xFE},
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// 0x181C = Half cycle, Fast RMS threshold 6172
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{BL0942_WRITE_COMMAND, BL0942_REG_I_FAST_RMS_CTRL, 0x1C, 0x18, 0x00, 0x1B}};
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void BL0942::loop() {
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DataPacket buffer;
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if (!this->available()) {
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return;
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}
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if (read_array((uint8_t *) &buffer, sizeof(buffer))) {
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if (validate_checksum(&buffer)) {
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received_package_(&buffer);
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}
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} else {
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ESP_LOGW(TAG, "Junk on wire. Throwing away partial message");
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while (read() >= 0)
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;
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}
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}
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bool BL0942::validate_checksum(DataPacket *data) {
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uint8_t checksum = BL0942_READ_COMMAND;
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// Whole package but checksum
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uint8_t *raw = (uint8_t *) data;
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for (uint32_t i = 0; i < sizeof(*data) - 1; i++) {
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checksum += raw[i];
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}
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checksum ^= 0xFF;
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if (checksum != data->checksum) {
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ESP_LOGW(TAG, "BL0942 invalid checksum! 0x%02X != 0x%02X", checksum, data->checksum);
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}
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return checksum == data->checksum;
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}
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void BL0942::update() {
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this->flush();
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this->write_byte(BL0942_READ_COMMAND);
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this->write_byte(BL0942_FULL_PACKET);
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}
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void BL0942::setup() {
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for (auto *i : BL0942_INIT) {
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this->write_array(i, 6);
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delay(1);
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}
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this->flush();
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}
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void BL0942::received_package_(DataPacket *data) {
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// Bad header
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if (data->frame_header != BL0942_PACKET_HEADER) {
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ESP_LOGI(TAG, "Invalid data. Header mismatch: %d", data->frame_header);
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return;
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}
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float v_rms = (uint24_t) data->v_rms / voltage_reference_;
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float i_rms = (uint24_t) data->i_rms / current_reference_;
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float watt = (int24_t) data->watt / power_reference_;
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uint32_t cf_cnt = (uint24_t) data->cf_cnt;
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float total_energy_consumption = cf_cnt / energy_reference_;
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float frequency = 1000000.0f / data->frequency;
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if (voltage_sensor_ != nullptr) {
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voltage_sensor_->publish_state(v_rms);
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}
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if (current_sensor_ != nullptr) {
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current_sensor_->publish_state(i_rms);
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}
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if (power_sensor_ != nullptr) {
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power_sensor_->publish_state(watt);
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}
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if (energy_sensor_ != nullptr) {
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energy_sensor_->publish_state(total_energy_consumption);
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}
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if (frequency_sensor_ != nullptr) {
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frequency_sensor_->publish_state(frequency);
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}
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ESP_LOGV(TAG, "BL0942: U %fV, I %fA, P %fW, Cnt %" PRId32 ", ∫P %fkWh, frequency %fHz, status 0x%08X", v_rms, i_rms,
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watt, cf_cnt, total_energy_consumption, frequency, data->status);
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}
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void BL0942::dump_config() { // NOLINT(readability-function-cognitive-complexity)
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ESP_LOGCONFIG(TAG, "BL0942:");
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LOG_SENSOR("", "Voltage", this->voltage_sensor_);
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LOG_SENSOR("", "Current", this->current_sensor_);
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LOG_SENSOR("", "Power", this->power_sensor_);
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LOG_SENSOR("", "Energy", this->energy_sensor_);
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LOG_SENSOR("", "frequency", this->frequency_sensor_);
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}
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} // namespace bl0942
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} // namespace esphome
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