sascha/esphome
1
0
Fork 0
mirror of https://github.com/esphome/esphome.git synced 2025-10-30 06:33:51 +00:00
Code Issues Releases Wiki Activity

Add support for PCA9535 16 bit I/O expander (#5634)

Browse Source
This commit is contained in:
Clyde Stubbs
2023-11-01 10:22:04 +11:00
committed by GitHub
parent 8eae882d93
commit 1fd9d67e2b
5 changed files with 70 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
esphome/components/pca9554/pca9554.cpp
View File

@@ -4,6 +4,7 @@
namespace esphome {
namespace pca9554 {
// for 16 bit expanders, these addresses will be doubled.
const uint8_t INPUT_REG = 0;
const uint8_t OUTPUT_REG = 1;
const uint8_t INVERT_REG = 2;
@@ -13,9 +14,10 @@ static const char *const TAG = "pca9554";
void PCA9554Component::setup() {
ESP_LOGCONFIG(TAG, "Setting up PCA9554/PCA9554A...");
this->reg_width_ = (this->pin_count_ + 7) / 8;
// Test to see if device exists
if (!this->read_inputs_()) {
ESP_LOGE(TAG, "PCA9554 not available under 0x%02X", this->address_);
ESP_LOGE(TAG, "PCA95xx not detected at 0x%02X", this->address_);
this->mark_failed();
return;
}
@@ -44,6 +46,7 @@ void PCA9554Component::loop() {
void PCA9554Component::dump_config() {
ESP_LOGCONFIG(TAG, "PCA9554:");
ESP_LOGCONFIG(TAG, " I/O Pins: %d", this->pin_count_);
LOG_I2C_DEVICE(this)
if (this->is_failed()) {
ESP_LOGE(TAG, "Communication with PCA9554 failed!");
@@ -85,25 +88,33 @@ void PCA9554Component::pin_mode(uint8_t pin, gpio::Flags flags) {
}
bool PCA9554Component::read_inputs_() {
uint8_t inputs;
uint8_t inputs[2];
if (this->is_failed()) {
ESP_LOGD(TAG, "Device marked failed");
return false;
}
if ((this->last_error_ = this->read_register(INPUT_REG, &inputs, 1, true)) != esphome::i2c::ERROR_OK) {
if ((this->last_error_ = this->read_register(INPUT_REG * this->reg_width_, inputs, this->reg_width_, true)) !=
esphome::i2c::ERROR_OK) {
this->status_set_warning();
ESP_LOGE(TAG, "read_register_(): I2C I/O error: %d", (int) this->last_error_);
return false;
}
this->status_clear_warning();
this->input_mask_ = inputs;
this->input_mask_ = inputs[0];
if (this->reg_width_ == 2) {
this->input_mask_ |= inputs[1] << 8;
}
return true;
}
bool PCA9554Component::write_register_(uint8_t reg, uint8_t value) {
if ((this->last_error_ = this->write_register(reg, &value, 1, true)) != esphome::i2c::ERROR_OK) {
bool PCA9554Component::write_register_(uint8_t reg, uint16_t value) {
uint8_t outputs[2];
outputs[0] = (uint8_t) value;
outputs[1] = (uint8_t) (value >> 8);
if ((this->last_error_ = this->write_register(reg * this->reg_width_, outputs, this->reg_width_, true)) !=
esphome::i2c::ERROR_OK) {
this->status_set_warning();
ESP_LOGE(TAG, "write_register_(): I2C I/O error: %d", (int) this->last_error_);
return false;