256 lines
9.7 KiB
C
256 lines
9.7 KiB
C
#include "zh_pcf8574.h"
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static const char *TAG = "zh_pcf8574";
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static gpio_num_t _interrupt_gpio = GPIO_NUM_MAX;
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static SemaphoreHandle_t _interrupt_semaphore = {0};
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static zh_vector_t _vector = {0};
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static void _zh_isr_handler(void *arg);
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static void _zh_isr_processing_task(void *pvParameter);
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static esp_err_t _zh_read_register(zh_pcf8574_handle_t *handle, uint8_t *reg);
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static esp_err_t _zh_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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ESP_LOGI(TAG, "PCF8574 initialization begin.");
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if (config == NULL || handle == NULL || config->i2c_address == 0xFF)
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{
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ESP_LOGE(TAG, "PCF8574 initialization fail. Invalid argument.");
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return ESP_ERR_INVALID_ARG;
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}
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handle->i2c_address = config->i2c_address;
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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) | (config->p4_gpio_work_mode << 4) |
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(config->p3_gpio_work_mode << 3) | (config->p2_gpio_work_mode << 2) | (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_port = config->i2c_port;
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#ifndef CONFIG_IDF_TARGET_ESP8266
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handle->i2c_handle = config->i2c_handle;
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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 = handle->i2c_address,
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.scl_speed_hz = 100000,
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};
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i2c_master_bus_add_device(handle->i2c_handle, &pcf8574_config, &handle->dev_handle);
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if (i2c_master_probe(handle->i2c_handle, handle->i2c_address, 1000 / portTICK_PERIOD_MS) != ESP_OK)
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{
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ESP_LOGE(TAG, "PCF8574 initialization fail. Expander not connected or not responded.");
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return ESP_ERR_NOT_FOUND;
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}
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#endif
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handle->is_initialized = true;
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if (_zh_write_register(handle, handle->gpio_work_mode) != ESP_OK)
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{
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ESP_LOGE(TAG, "PCF8574 initialization fail. I2C driver error at line %d.", __LINE__);
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handle->is_initialized = false;
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return ESP_ERR_INVALID_RESPONSE;
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}
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if (_interrupt_gpio == GPIO_NUM_MAX && config->interrupt_gpio != GPIO_NUM_MAX)
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{
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zh_vector_init(&_vector, sizeof(zh_pcf8574_handle_t));
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_interrupt_gpio = config->interrupt_gpio;
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gpio_config_t isr_pin_config = {0};
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isr_pin_config.intr_type = GPIO_INTR_NEGEDGE;
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isr_pin_config.mode = GPIO_MODE_INPUT;
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isr_pin_config.pin_bit_mask = (1ULL << _interrupt_gpio);
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isr_pin_config.pull_down_en = GPIO_PULLDOWN_DISABLE;
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isr_pin_config.pull_up_en = GPIO_PULLUP_ENABLE;
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if (gpio_config(&isr_pin_config) != ESP_OK)
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{
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ESP_LOGW(TAG, "PCF8574 initialization warning. GPIO driver error at line %d.", __LINE__);
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}
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else
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{
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_interrupt_semaphore = xSemaphoreCreateBinary();
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if (xTaskCreatePinnedToCore(&_zh_isr_processing_task, "_zh_isr_processing_task", config->stack_size, NULL, config->task_priority, NULL, tskNO_AFFINITY) != pdPASS)
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{
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ESP_LOGE(TAG, "PCF8574 initialization warning. Internal error at line %d.", __LINE__);
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return ESP_FAIL;
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}
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gpio_install_isr_service(0);
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gpio_isr_handler_add(_interrupt_gpio, _zh_isr_handler, NULL);
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}
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}
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if (_interrupt_gpio != GPIO_NUM_MAX && handle->gpio_work_mode != 0)
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{
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zh_vector_push_back(&_vector, handle);
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}
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ESP_LOGI(TAG, "PCF8574 initialization success.");
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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_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_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_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, zh_pcf8574_gpio_number_t gpio, bool *status)
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{
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uint8_t reg_temp = 0;
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esp_err_t err = _zh_read_register(handle, ®_temp);
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*status = ((reg_temp & gpio) ? 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, zh_pcf8574_gpio_number_t gpio, bool status)
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{
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if (status == true)
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{
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return _zh_write_register(handle, handle->gpio_status | handle->gpio_work_mode | gpio);
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}
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else
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{
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return _zh_write_register(handle, (handle->gpio_status ^ gpio) | handle->gpio_work_mode);
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}
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}
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void IRAM_ATTR _zh_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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void _zh_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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ESP_LOGI(TAG, "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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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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_zh_read_register(handle, ®_temp);
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if (((handle->gpio_work_mode & EXP_GPIO_NUM_P0) != 0) && ((reg_temp & EXP_GPIO_NUM_P0) == 0))
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{
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event.gpio_number = 0;
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}
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else if (((handle->gpio_work_mode & EXP_GPIO_NUM_P1) != 0) && ((reg_temp & EXP_GPIO_NUM_P1) == 0))
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{
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event.gpio_number = 1;
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}
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else if (((handle->gpio_work_mode & EXP_GPIO_NUM_P2) != 0) && ((reg_temp & EXP_GPIO_NUM_P2) == 0))
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{
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event.gpio_number = 2;
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}
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else if (((handle->gpio_work_mode & EXP_GPIO_NUM_P3) != 0) && ((reg_temp & EXP_GPIO_NUM_P3) == 0))
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{
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event.gpio_number = 3;
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}
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else if (((handle->gpio_work_mode & EXP_GPIO_NUM_P4) != 0) && ((reg_temp & EXP_GPIO_NUM_P4) == 0))
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{
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event.gpio_number = 4;
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}
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else if (((handle->gpio_work_mode & EXP_GPIO_NUM_P5) != 0) && ((reg_temp & EXP_GPIO_NUM_P5) == 0))
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{
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event.gpio_number = 5;
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}
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else if (((handle->gpio_work_mode & EXP_GPIO_NUM_P6) != 0) && ((reg_temp & EXP_GPIO_NUM_P6) == 0))
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{
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event.gpio_number = 6;
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}
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else if (((handle->gpio_work_mode & EXP_GPIO_NUM_P7) != 0) && ((reg_temp & EXP_GPIO_NUM_P7) == 0))
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{
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event.gpio_number = 7;
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}
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if (event.gpio_number != 0xFF)
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{
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if (esp_event_post(ZH_PCF8574, 0, &event, sizeof(event), portTICK_PERIOD_MS) != ESP_OK)
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{
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ESP_LOGE(TAG, "PCF8574 isr processing task internal error at line %d.", __LINE__);
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}
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}
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}
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ESP_LOGI(TAG, "PCF8574 isr processing success.");
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}
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vTaskDelete(NULL);
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}
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esp_err_t _zh_read_register(zh_pcf8574_handle_t *handle, uint8_t *reg)
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{
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ESP_LOGI(TAG, "PCF8574 read begin.");
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if (handle == NULL)
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{
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ESP_LOGE(TAG, "PCF8574 read fail. Invalid argument.");
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return ESP_ERR_INVALID_ARG;
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}
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if (handle->is_initialized == false)
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{
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ESP_LOGE(TAG, "PCF8574 read fail. PCF8574 not initialized.");
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return ESP_ERR_NOT_FOUND;
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}
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esp_err_t err = ESP_OK;
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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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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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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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if (err != ESP_OK)
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{
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ESP_LOGE(TAG, "PCF8574 read fail. I2C driver error at line %d.", __LINE__);
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return ESP_ERR_INVALID_RESPONSE;
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}
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*reg = handle->gpio_status;
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ESP_LOGI(TAG, "PCF8574 read success.");
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return ESP_OK;
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}
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esp_err_t _zh_write_register(zh_pcf8574_handle_t *handle, uint8_t reg)
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{
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ESP_LOGI(TAG, "PCF8574 write begin.");
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if (handle == NULL)
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{
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ESP_LOGE(TAG, "PCF8574 write fail. Invalid argument.");
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return ESP_ERR_INVALID_ARG;
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}
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if (handle->is_initialized == false)
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{
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ESP_LOGE(TAG, "PCF8574 write fail. PCF8574 not initialized.");
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return ESP_ERR_NOT_FOUND;
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}
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esp_err_t err = ESP_OK;
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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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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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err = i2c_master_transmit(handle->dev_handle, ®, sizeof(reg), 1000 / portTICK_PERIOD_MS);
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#endif
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if (err != ESP_OK)
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{
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ESP_LOGE(TAG, "PCF8574 write fail. I2C driver error at line %d.", __LINE__);
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return ESP_ERR_INVALID_RESPONSE;
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}
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handle->gpio_status = reg;
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ESP_LOGI(TAG, "PCF8574 write success.");
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return ESP_OK;
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} |