297 lines
13 KiB
C
297 lines
13 KiB
C
#include "zh_pcf8574.h"
|
|
|
|
static const char *TAG = "zh_pcf8574";
|
|
|
|
#define ZH_PCF8574_LOGI(msg, ...) ESP_LOGI(TAG, msg, ##__VA_ARGS__)
|
|
#define ZH_PCF8574_LOGW(msg, ...) ESP_LOGW(TAG, msg, ##__VA_ARGS__)
|
|
#define ZH_PCF8574_LOGE(msg, ...) ESP_LOGE(TAG, msg, ##__VA_ARGS__)
|
|
#define ZH_PCF8574_LOGE_ERR(msg, err, ...) ESP_LOGE(TAG, "[%s:%d:%s] " msg, __FILE__, __LINE__, esp_err_to_name(err), ##__VA_ARGS__)
|
|
|
|
#define ZH_PCF8574_CHECK(cond, err, msg, ...) \
|
|
if (!(cond)) \
|
|
{ \
|
|
ZH_PCF8574_LOGE_ERR(msg, err); \
|
|
return err; \
|
|
}
|
|
|
|
static gpio_num_t _interrupt_gpio = GPIO_NUM_MAX;
|
|
static SemaphoreHandle_t _interrupt_semaphore = NULL;
|
|
static uint8_t _gpio_matrix[8] = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80};
|
|
|
|
static zh_vector_t _vector = {0};
|
|
|
|
static esp_err_t _zh_pcf8574_validate_config(const zh_pcf8574_init_config_t *config);
|
|
static esp_err_t _zh_pcf8574_configure_i2c_device(const zh_pcf8574_init_config_t *config, zh_pcf8574_handle_t *handle);
|
|
static esp_err_t _zh_pcf8574_configure_interrupts(const zh_pcf8574_init_config_t *config, zh_pcf8574_handle_t handle);
|
|
static void _zh_pcf8574_isr_handler(void *arg);
|
|
static void _zh_pcf8574_isr_processing_task(void *pvParameter);
|
|
static esp_err_t _zh_pcf8574_read_register(zh_pcf8574_handle_t *handle, uint8_t *reg);
|
|
static esp_err_t _zh_pcf8574_write_register(zh_pcf8574_handle_t *handle, uint8_t reg);
|
|
|
|
ESP_EVENT_DEFINE_BASE(ZH_PCF8574);
|
|
|
|
esp_err_t zh_pcf8574_init(const zh_pcf8574_init_config_t *config, zh_pcf8574_handle_t *handle)
|
|
{
|
|
ZH_PCF8574_LOGI("PCF8574 initialization started.");
|
|
ZH_PCF8574_CHECK(handle != NULL, ESP_ERR_INVALID_ARG, "PCF8574 initialization failed. Invalid argument.");
|
|
ZH_PCF8574_CHECK(handle->is_initialized == false, ESP_ERR_INVALID_STATE, "PCF8574 initialization failed. PCF8574 is already initialized.");
|
|
esp_err_t err = _zh_pcf8574_validate_config(config);
|
|
ZH_PCF8574_CHECK(err == ESP_OK, err, "PCF8574 initialization failed. Initial configuration check failed.");
|
|
ZH_PCF8574_LOGI("PCF8574 initial configuration check completed successfully.");
|
|
err = _zh_pcf8574_configure_i2c_device(config, handle);
|
|
ZH_PCF8574_CHECK(err == ESP_OK, err, "PCF8574 initialization failed. Failed to add I2C device.");
|
|
ZH_PCF8574_LOGI("PCF8574 add I2C device completed successfully.");
|
|
err = _zh_pcf8574_write_register(handle, handle->gpio_work_mode);
|
|
if (err != ESP_OK)
|
|
{
|
|
handle->is_initialized = false;
|
|
ZH_PCF8574_LOGE_ERR("PCF8574 initialization failed. Failed GPIO setup.", err);
|
|
return err;
|
|
}
|
|
ZH_PCF8574_LOGI("GPIO setup completed successfully.");
|
|
if (config->interrupt_gpio < GPIO_NUM_MAX && config->interrupt_gpio >= GPIO_NUM_0 && handle->gpio_work_mode != 0)
|
|
{
|
|
err = _zh_pcf8574_configure_interrupts(config, *handle);
|
|
if (err != ESP_OK)
|
|
{
|
|
handle->is_initialized = false;
|
|
ZH_PCF8574_LOGE_ERR("PCF8574 initialization failed. Interrupt setup failed.", err);
|
|
return err;
|
|
}
|
|
ZH_PCF8574_LOGI("Interrupt setup completed successfully.");
|
|
}
|
|
handle->is_initialized = true;
|
|
ZH_PCF8574_LOGI("PCF8574 initialization completed successfully.");
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t zh_pcf8574_read(zh_pcf8574_handle_t *handle, uint8_t *reg)
|
|
{
|
|
return _zh_pcf8574_read_register(handle, reg);
|
|
}
|
|
|
|
esp_err_t zh_pcf8574_write(zh_pcf8574_handle_t *handle, uint8_t reg)
|
|
{
|
|
return _zh_pcf8574_write_register(handle, (reg | handle->gpio_work_mode));
|
|
}
|
|
|
|
esp_err_t zh_pcf8574_reset(zh_pcf8574_handle_t *handle)
|
|
{
|
|
return _zh_pcf8574_write_register(handle, handle->gpio_work_mode);
|
|
}
|
|
|
|
esp_err_t zh_pcf8574_read_gpio(zh_pcf8574_handle_t *handle, uint8_t gpio, bool *status)
|
|
{
|
|
ZH_PCF8574_CHECK(gpio <= 7, ESP_FAIL, "Invalid GPIO number.")
|
|
uint8_t gpio_temp = _gpio_matrix[gpio];
|
|
uint8_t reg_temp = 0;
|
|
esp_err_t err = _zh_pcf8574_read_register(handle, ®_temp);
|
|
*status = ((reg_temp & gpio_temp) ? 1 : 0);
|
|
return err;
|
|
}
|
|
|
|
esp_err_t zh_pcf8574_write_gpio(zh_pcf8574_handle_t *handle, uint8_t gpio, bool status)
|
|
{
|
|
ZH_PCF8574_CHECK(gpio <= 7, ESP_FAIL, "Invalid GPIO number.")
|
|
uint8_t gpio_temp = _gpio_matrix[gpio];
|
|
if (status == true)
|
|
{
|
|
return _zh_pcf8574_write_register(handle, handle->gpio_status | handle->gpio_work_mode | gpio_temp);
|
|
}
|
|
return _zh_pcf8574_write_register(handle, (handle->gpio_status ^ gpio_temp) | handle->gpio_work_mode);
|
|
}
|
|
|
|
static esp_err_t _zh_pcf8574_validate_config(const zh_pcf8574_init_config_t *config)
|
|
{
|
|
ZH_PCF8574_CHECK(config != NULL, ESP_ERR_INVALID_ARG, "Invalid configuration.");
|
|
ZH_PCF8574_CHECK((config->i2c_address >= 0x20 && config->i2c_address <= 0x27) || (config->i2c_address >= 0x38 && config->i2c_address <= 0x3F), ESP_ERR_INVALID_ARG, "Invalid I2C address.");
|
|
ZH_PCF8574_CHECK(config->task_priority >= 10 && config->stack_size >= 2048, ESP_ERR_INVALID_ARG, "Invalid task settings.");
|
|
ZH_PCF8574_CHECK(config->interrupt_gpio >= 0 && config->interrupt_gpio <= GPIO_NUM_MAX, ESP_ERR_INVALID_ARG, "Invalid GPIO number.");
|
|
#ifndef CONFIG_IDF_TARGET_ESP8266
|
|
ZH_PCF8574_CHECK(config->i2c_handle != NULL, ESP_ERR_INVALID_ARG, "Invalid I2C handle.");
|
|
#endif
|
|
return ESP_OK;
|
|
}
|
|
|
|
static esp_err_t _zh_pcf8574_configure_i2c_device(const zh_pcf8574_init_config_t *config, zh_pcf8574_handle_t *handle)
|
|
{
|
|
#ifndef CONFIG_IDF_TARGET_ESP8266
|
|
i2c_device_config_t pcf8574_config = {
|
|
.dev_addr_length = I2C_ADDR_BIT_LEN_7,
|
|
.device_address = config->i2c_address,
|
|
.scl_speed_hz = 100000,
|
|
};
|
|
i2c_master_dev_handle_t _dev_handle = NULL;
|
|
esp_err_t err = i2c_master_bus_add_device(config->i2c_handle, &pcf8574_config, &_dev_handle);
|
|
if (err != ESP_OK)
|
|
{
|
|
ZH_PCF8574_LOGE_ERR("Failed to add I2C device.", err);
|
|
i2c_master_bus_rm_device(_dev_handle);
|
|
handle->dev_handle = NULL;
|
|
return err;
|
|
}
|
|
err = i2c_master_probe(config->i2c_handle, config->i2c_address, 1000 / portTICK_PERIOD_MS);
|
|
if (err != ESP_OK)
|
|
{
|
|
ZH_PCF8574_LOGE_ERR("Expander not connected or not responding.", err);
|
|
i2c_master_bus_rm_device(_dev_handle);
|
|
handle->dev_handle = NULL;
|
|
return err;
|
|
}
|
|
handle->i2c_handle = config->i2c_handle;
|
|
handle->dev_handle = _dev_handle;
|
|
#endif
|
|
handle->gpio_work_mode = (config->p7_gpio_work_mode << 7) | (config->p6_gpio_work_mode << 6) | (config->p5_gpio_work_mode << 5) |
|
|
(config->p4_gpio_work_mode << 4) | (config->p3_gpio_work_mode << 3) | (config->p2_gpio_work_mode << 2) |
|
|
(config->p1_gpio_work_mode << 1) | (config->p0_gpio_work_mode << 0);
|
|
handle->gpio_status = handle->gpio_work_mode;
|
|
handle->i2c_address = config->i2c_address;
|
|
handle->i2c_port = config->i2c_port;
|
|
handle->is_initialized = true;
|
|
return ESP_OK;
|
|
}
|
|
|
|
static esp_err_t _zh_pcf8574_configure_interrupts(const zh_pcf8574_init_config_t *config, zh_pcf8574_handle_t handle)
|
|
{
|
|
if (_interrupt_gpio != GPIO_NUM_MAX)
|
|
{
|
|
esp_err_t err = zh_vector_push_back(&_vector, &handle);
|
|
ZH_PCF8574_CHECK(err == ESP_OK, err, "Failed add item to vector.")
|
|
return ESP_OK;
|
|
}
|
|
_interrupt_gpio = config->interrupt_gpio;
|
|
esp_err_t err = zh_vector_init(&_vector, sizeof(zh_pcf8574_handle_t));
|
|
ZH_PCF8574_CHECK(err == ESP_OK, err, "Failed create vector.")
|
|
err = zh_vector_push_back(&_vector, &handle);
|
|
ZH_PCF8574_CHECK(err == ESP_OK, err, "Failed add item to vector.")
|
|
gpio_config_t isr_pin_config = {
|
|
.intr_type = GPIO_INTR_NEGEDGE,
|
|
.mode = GPIO_MODE_INPUT,
|
|
.pin_bit_mask = (1ULL << _interrupt_gpio),
|
|
.pull_down_en = GPIO_PULLDOWN_DISABLE,
|
|
.pull_up_en = GPIO_PULLUP_ENABLE,
|
|
};
|
|
err = gpio_config(&isr_pin_config);
|
|
ZH_PCF8574_CHECK(err == ESP_OK, err, "GPIO configuration failed.")
|
|
err = gpio_install_isr_service(0);
|
|
ZH_PCF8574_CHECK(err == ESP_OK, err, "Failed install isr service.")
|
|
err = gpio_isr_handler_add(_interrupt_gpio, _zh_pcf8574_isr_handler, NULL);
|
|
ZH_PCF8574_CHECK(err == ESP_OK, err, "Failed add isr handler.")
|
|
_interrupt_semaphore = xSemaphoreCreateBinary();
|
|
ZH_PCF8574_CHECK(_interrupt_semaphore != NULL, ESP_ERR_NO_MEM, "Failed to create semaphore.")
|
|
BaseType_t x_err = xTaskCreatePinnedToCore(
|
|
&_zh_pcf8574_isr_processing_task,
|
|
"_zh_pcf8574_isr_processing_task",
|
|
config->stack_size,
|
|
NULL,
|
|
config->task_priority,
|
|
NULL,
|
|
tskNO_AFFINITY);
|
|
if (x_err != pdPASS)
|
|
{
|
|
ZH_PCF8574_LOGE("Failed to create isr processing task.");
|
|
vSemaphoreDelete(_interrupt_semaphore);
|
|
return ESP_FAIL;
|
|
}
|
|
return ESP_OK;
|
|
}
|
|
|
|
static void IRAM_ATTR _zh_pcf8574_isr_handler(void *arg)
|
|
{
|
|
BaseType_t xHigherPriorityTaskWoken = pdFALSE;
|
|
xSemaphoreGiveFromISR(_interrupt_semaphore, &xHigherPriorityTaskWoken);
|
|
if (xHigherPriorityTaskWoken == pdTRUE)
|
|
{
|
|
portYIELD_FROM_ISR();
|
|
};
|
|
}
|
|
|
|
static void IRAM_ATTR _zh_pcf8574_isr_processing_task(void *pvParameter)
|
|
{
|
|
for (;;)
|
|
{
|
|
xSemaphoreTake(_interrupt_semaphore, portMAX_DELAY);
|
|
ZH_PCF8574_LOGI("PCF8574 isr processing begin.");
|
|
for (uint16_t i = 0; i < zh_vector_get_size(&_vector); ++i)
|
|
{
|
|
zh_pcf8574_handle_t *handle = zh_vector_get_item(&_vector, i);
|
|
if (handle == NULL)
|
|
{
|
|
ZH_PCF8574_LOGE("PCF8574 isr processing failed. Failed to get vector item data.");
|
|
continue;
|
|
}
|
|
zh_pcf8574_event_on_isr_t event = {0};
|
|
event.i2c_address = handle->i2c_address;
|
|
event.gpio_number = 0xFF;
|
|
uint8_t reg_temp = 0;
|
|
esp_err_t err = _zh_pcf8574_read_register(handle, ®_temp);
|
|
if (err != ESP_OK)
|
|
{
|
|
ZH_PCF8574_LOGE_ERR("PCF8574 isr processing failed. Failed to read expander register.", err);
|
|
continue;
|
|
}
|
|
for (uint8_t j = 0; j <= 7; ++j)
|
|
{
|
|
if (((handle->gpio_work_mode & _gpio_matrix[j]) != 0) && ((reg_temp & _gpio_matrix[j]) == 0))
|
|
{
|
|
event.gpio_number = j;
|
|
break;
|
|
}
|
|
}
|
|
if (event.gpio_number != 0xFF)
|
|
{
|
|
err = esp_event_post(ZH_PCF8574, 0, &event, sizeof(event), portTICK_PERIOD_MS);
|
|
if (err != ESP_OK)
|
|
{
|
|
ZH_PCF8574_LOGE_ERR("PCF8574 isr processing failed. Failed to post interrupt event.", err);
|
|
}
|
|
}
|
|
}
|
|
ZH_PCF8574_LOGI("PCF8574 isr processing completed successfully.");
|
|
}
|
|
vTaskDelete(NULL);
|
|
}
|
|
|
|
static esp_err_t _zh_pcf8574_read_register(zh_pcf8574_handle_t *handle, uint8_t *reg)
|
|
{
|
|
ZH_PCF8574_LOGI("PCF8574 read started.");
|
|
ZH_PCF8574_CHECK(handle != NULL || reg != NULL, ESP_ERR_INVALID_ARG, "PCF8574 read failed. Invalid argument.");
|
|
ZH_PCF8574_CHECK(handle->is_initialized == true, ESP_ERR_NOT_FOUND, "PCF8574 read failed. PCF8574 not initialized.");
|
|
#ifdef CONFIG_IDF_TARGET_ESP8266
|
|
i2c_cmd_handle_t i2c_cmd_handle = i2c_cmd_link_create();
|
|
i2c_master_start(i2c_cmd_handle);
|
|
i2c_master_write_byte(i2c_cmd_handle, handle->i2c_address << 1 | I2C_MASTER_READ, true);
|
|
i2c_master_read_byte(i2c_cmd_handle, &handle->gpio_status, I2C_MASTER_NACK);
|
|
i2c_master_stop(i2c_cmd_handle);
|
|
esp_err_t err = i2c_master_cmd_begin(handle->i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
|
|
i2c_cmd_link_delete(i2c_cmd_handle);
|
|
#else
|
|
esp_err_t err = i2c_master_receive(handle->dev_handle, &handle->gpio_status, sizeof(handle->gpio_status), 1000 / portTICK_PERIOD_MS);
|
|
#endif
|
|
ZH_PCF8574_CHECK(err == ESP_OK, err, "PCF8574 read failed. I2C driver error.");
|
|
*reg = handle->gpio_status;
|
|
ZH_PCF8574_LOGI("PCF8574 read completed successfully.");
|
|
return ESP_OK;
|
|
}
|
|
|
|
static esp_err_t _zh_pcf8574_write_register(zh_pcf8574_handle_t *handle, uint8_t reg)
|
|
{
|
|
ZH_PCF8574_LOGI("PCF8574 write started.");
|
|
ZH_PCF8574_CHECK(handle != NULL, ESP_ERR_INVALID_ARG, "PCF8574 write failed. Invalid argument.");
|
|
ZH_PCF8574_CHECK(handle->is_initialized == true, ESP_ERR_NOT_FOUND, "PCF8574 write failed. PCF8574 not initialized.");
|
|
#ifdef CONFIG_IDF_TARGET_ESP8266
|
|
i2c_cmd_handle_t i2c_cmd_handle = i2c_cmd_link_create();
|
|
i2c_master_start(i2c_cmd_handle);
|
|
i2c_master_write_byte(i2c_cmd_handle, handle->i2c_address << 1 | I2C_MASTER_WRITE, true);
|
|
i2c_master_write_byte(i2c_cmd_handle, reg, true);
|
|
i2c_master_stop(i2c_cmd_handle);
|
|
esp_err_t err = i2c_master_cmd_begin(handle->i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
|
|
i2c_cmd_link_delete(i2c_cmd_handle);
|
|
#else
|
|
esp_err_t err = i2c_master_transmit(handle->dev_handle, ®, sizeof(reg), 1000 / portTICK_PERIOD_MS);
|
|
#endif
|
|
ZH_PCF8574_CHECK(err == ESP_OK, err, "PCF8574 write failed. I2C driver error.");
|
|
handle->gpio_status = reg;
|
|
ZH_PCF8574_LOGI("PCF8574 write completed successfully.");
|
|
return ESP_OK;
|
|
} |