esp_components/zh_pcf8574
1
1
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Compare commits

base: esp_components:v2.0.0
Branches Tags
esp_components:main esp_components:dev
esp_components:v2.0.0 esp_components:v1.3.1 esp_components:v1.3.0 esp_components:v1.2.0 esp_components:v1.1.0 esp_components:v1.0.0
..
compare: esp_components:157aa7f49b2f7f7879ebb427b858aea34a67050d
Branches Tags
esp_components:dev esp_components:main
esp_components:v2.0.0 esp_components:v1.3.1 esp_components:v1.3.0 esp_components:v1.2.0 esp_components:v1.1.0 esp_components:v1.0.0

2 Commits
v2.0.0 ... 157aa7f49b

Author SHA1 Message Date
Alexey Zholtikov
157aa7f49b doc: update example 2025-11-09 21:38:48 +03:00
Alexey Zholtikov
e5efc03098 perf: updated error checks 2025-11-04 09:22:43 +03:00
2 changed files with 9 additions and 9 deletions
Expand all files Collapse all files

12
README.md
View File

@@ -76,12 +76,12 @@ void app_main(void)
i2c_new_master_bus(&i2c_bus_config, &i2c_bus_handle);
esp_event_loop_create_default(); // Required only if used input GPIO interrupts.
esp_event_handler_instance_register(ZH_PCF8574, ESP_EVENT_ANY_ID, &zh_pcf8574_event_handler, NULL, NULL); // Required only if used input GPIO interrupts.
zh_pcf8574_init_config_t pcf8574_init_config = ZH_PCF8574_INIT_CONFIG_DEFAULT();
pcf8574_init_config.i2c_handle = i2c_bus_handle;
pcf8574_init_config.i2c_address = 0x38;
pcf8574_init_config.p0_gpio_work_mode = true; // Required only for input GPIO.
pcf8574_init_config.interrupt_gpio = GPIO_NUM_14; // Required only if used input GPIO interrupts.
zh_pcf8574_init(&pcf8574_init_config, &pcf8574_handle);
zh_pcf8574_init_config_t config = ZH_PCF8574_INIT_CONFIG_DEFAULT();
config.i2c_handle = i2c_bus_handle;
config.i2c_address = 0x38;
config.p0_gpio_work_mode = true; // Required only for input GPIO.
config.interrupt_gpio = GPIO_NUM_14; // Required only if used input GPIO interrupts.
zh_pcf8574_init(&config, &pcf8574_handle);
uint8_t reg = 0;
zh_pcf8574_read(&pcf8574_handle, &reg);
print_gpio_status("GPIO status: ", reg);

6
zh_pcf8574.c
View File

@@ -61,7 +61,7 @@ esp_err_t zh_pcf8574_init(const zh_pcf8574_init_config_t *config, zh_pcf8574_han
esp_err_t zh_pcf8574_read(zh_pcf8574_handle_t *handle, uint8_t *reg)
{
ZH_LOGI("PCF8574 read register started.");
ZH_ERROR_CHECK(handle != NULL || reg != NULL, ESP_ERR_INVALID_ARG, NULL, "PCF8574 read register failed. Invalid argument.");
ZH_ERROR_CHECK(handle != NULL && reg != NULL, ESP_ERR_INVALID_ARG, NULL, "PCF8574 read register failed. Invalid argument.");
ZH_ERROR_CHECK(handle->is_initialized == true, ESP_ERR_NOT_FOUND, NULL, "PCF8574 read register failed. PCF8574 not initialized.");
esp_err_t err = _zh_pcf8574_read_register(handle, reg);
ZH_ERROR_CHECK(err == ESP_OK, err, NULL, "PCF8574 read register failed.");
@@ -94,7 +94,7 @@ esp_err_t zh_pcf8574_reset(zh_pcf8574_handle_t *handle)
esp_err_t zh_pcf8574_read_gpio(zh_pcf8574_handle_t *handle, uint8_t gpio, bool *status)
{
ZH_LOGI("PCF8574 read GPIO started.");
ZH_ERROR_CHECK(handle != NULL || status != NULL, ESP_ERR_INVALID_ARG, NULL, "PCF8574 read GPIO failed. Invalid argument.");
ZH_ERROR_CHECK(handle != NULL && status != NULL, ESP_ERR_INVALID_ARG, NULL, "PCF8574 read GPIO failed. Invalid argument.");
ZH_ERROR_CHECK(gpio <= 7, ESP_FAIL, NULL, "PCF8574 read GPIO failed. Invalid GPIO number.")
ZH_ERROR_CHECK(handle->is_initialized == true, ESP_ERR_NOT_FOUND, NULL, "PCF8574 read GPIO failed. PCF8574 not initialized.");
uint8_t gpio_temp = _gpio_matrix[gpio];
@@ -175,7 +175,7 @@ static esp_err_t _zh_pcf8574_i2c_init(const zh_pcf8574_init_config_t *config, zh
};
i2c_master_dev_handle_t _dev_handle = NULL;
esp_err_t err = i2c_master_bus_add_device(config->i2c_handle, &pcf8574_config, &_dev_handle);
ZH_ERROR_CHECK(err == ESP_OK, err, NULL;, "Failed to add I2C device.");
ZH_ERROR_CHECK(err == ESP_OK, err, NULL, "Failed to add I2C device.");
err = i2c_master_probe(config->i2c_handle, config->i2c_address, 1000 / portTICK_PERIOD_MS);
ZH_ERROR_CHECK(err == ESP_OK, err, i2c_master_bus_rm_device(_dev_handle), "Expander not connected or not responding.");
handle->dev_handle = _dev_handle;