156 lines
6.1 KiB
C
156 lines
6.1 KiB
C
#pragma once
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#include "esp_log.h"
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#include "driver/gpio.h"
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#ifdef CONFIG_IDF_TARGET_ESP8266
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#include "driver/i2c.h"
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#else
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#include "driver/i2c_master.h"
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#endif
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "esp_event.h"
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#include "zh_vector.h"
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#define ZH_PCF8574_INIT_CONFIG_DEFAULT() \
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{ \
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.task_priority = 10, \
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.stack_size = 2048, \
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.i2c_address = 0xFF, \
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.p0_gpio_work_mode = 0, \
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.p1_gpio_work_mode = 0, \
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.p2_gpio_work_mode = 0, \
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.p3_gpio_work_mode = 0, \
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.p4_gpio_work_mode = 0, \
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.p5_gpio_work_mode = 0, \
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.p6_gpio_work_mode = 0, \
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.p7_gpio_work_mode = 0, \
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.interrupt_gpio = GPIO_NUM_MAX, \
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.i2c_port = 0}
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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typedef struct // Structure for initial initialization of PCF8574 expander.
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{
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uint8_t task_priority; // Task priority for the PCF8574 expander isr processing. @note It is not recommended to set a value less than 10.
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uint16_t stack_size; // Stack size for task for the PCF8574 expander isr processing processing. @note The minimum size is 2048 bytes.
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uint8_t i2c_address; // Expander I2C address.
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bool p0_gpio_work_mode; // Expander GPIO PO work mode. True for input, false for output.
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bool p1_gpio_work_mode; // Expander GPIO P1 work mode. True for input, false for output.
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bool p2_gpio_work_mode; // Expander GPIO P2 work mode. True for input, false for output.
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bool p3_gpio_work_mode; // Expander GPIO P3 work mode. True for input, false for output.
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bool p4_gpio_work_mode; // Expander GPIO P4 work mode. True for input, false for output.
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bool p5_gpio_work_mode; // Expander GPIO P5 work mode. True for input, false for output.
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bool p6_gpio_work_mode; // Expander GPIO P6 work mode. True for input, false for output.
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bool p7_gpio_work_mode; // Expander GPIO P7 work mode. True for input, false for output.
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uint8_t interrupt_gpio; // Interrupt GPIO. @attention Must be same for all PCF8574 expanders.
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bool i2c_port; // I2C port. @attention Must be same for all PCF8574 expanders.
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#ifndef CONFIG_IDF_TARGET_ESP8266
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i2c_master_bus_handle_t i2c_handle; // Unique I2C bus handle. @attention Must be same for all PCF8574 expanders.
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#endif
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} zh_pcf8574_init_config_t;
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typedef struct // PCF8574 expander handle.
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{
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uint8_t i2c_address; // Expander I2C address.
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uint8_t gpio_work_mode; // Expander GPIO's work mode.
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uint8_t gpio_status; // Expander GPIO's status.
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bool is_initialized; // Expander initialization flag.
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bool i2c_port; // I2C port.
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#ifndef CONFIG_IDF_TARGET_ESP8266
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i2c_master_bus_handle_t i2c_handle; // Unique I2C bus handle.
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i2c_master_dev_handle_t dev_handle; // Unique I2C device handle.
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#endif
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void *system; // System pointer for use in another components.
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} zh_pcf8574_handle_t;
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ESP_EVENT_DECLARE_BASE(ZH_PCF8574);
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typedef struct // Structure for sending data to the event handler when cause an interrupt. @note Should be used with ZH_PCF8574W event base.
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{
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uint8_t i2c_address; // The i2c address of PCF8574 expander that caused the interrupt.
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uint8_t gpio_number; // The GPIO that caused the interrupt.
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bool gpio_level; // The GPIO level that caused the interrupt.
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} zh_pcf8574_event_on_isr_t;
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/**
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* @brief Initialize PCF8574 expander.
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*
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* @param[in] config Pointer to PCF8574 initialized configuration structure. Can point to a temporary variable.
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* @param[out] handle Pointer to unique PCF8574 handle.
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*
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* @attention I2C driver must be initialized first.
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*
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* @note Before initialize the expander recommend initialize zh_pcf8574_init_config_t structure with default values.
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*
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* @code zh_pcf8574_init_config_t config = ZH_PCF8574_INIT_CONFIG_DEFAULT() @endcode
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*
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* @return ESP_OK if success or an error code otherwise.
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*/
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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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* @brief Read PCF8574 all GPIO's status.
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*
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* @param[in] handle Pointer to unique PCF8574 handle.
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* @param[out] reg Pointer to GPIO's status.
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*
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* @note For input GPIO's status will be 1 (HIGH) always.
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*
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* @return ESP_OK if success or an error code otherwise.
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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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* @brief Set PCF8574 all GPIO's status.
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*
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* @param[in] handle Pointer to unique PCF8574 handle.
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* @param[in] reg GPIO's status.
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*
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* @attention Only the GPIO outputs are affected.
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*
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* @return ESP_OK if success or an error code otherwise.
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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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* @brief Reset (set to initial) PCF8574 all GPIO's.
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*
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* @param[in] handle Pointer to unique PCF8574 handle.
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*
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* @return ESP_OK if success or an error code otherwise.
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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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* @brief Read PCF8574 GPIO status.
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*
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* @param[in] handle Pointer to unique PCF8574 handle.
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* @param[in] gpio GPIO number.
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* @param[out] status Pointer to GPIO status (true - HIGH, false - LOW).
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*
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* @note For input GPIO's status will be 1 (HIGH) always.
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*
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* @return ESP_OK if success or an error code otherwise.
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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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* @brief Set PCF8574 GPIO status.
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*
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* @param[in] handle Pointer to unique PCF8574 handle.
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* @param[in] gpio GPIO number.
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* @param[in] status GPIO status (true - HIGH, false - LOW).
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*
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* @attention Only the GPIO output is affected.
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*
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* @return ESP_OK if success or an error code otherwise.
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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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#ifdef __cplusplus
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}
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#endif |