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