avr_libraries/zh_avr_pcf8574
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This commit is contained in:
Alexey Zholtikov
2025-08-12 08:51:21 +03:00
parent 125c8d8f07
commit 7e9f7e8071
2 changed files with 6 additions and 6 deletions
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11
include/zh_avr_pcf8574.h
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@@ -30,7 +30,7 @@ extern "C"
typedef struct // Structure for initial initialization of PCF8574 expander. typedef struct // Structure for initial initialization of PCF8574 expander.
{ {
uint8_t task_priority; // Task priority for the PCF8574 expander isr processing. @note It is not recommended to set a value less than configMAX_PRIORITIES. uint8_t task_priority; // Task priority for the PCF8574 expander isr processing. @note It is not recommended to set a value less than configMAX_PRIORITIES.
uint8_t stack_size; // Stack size for task for the PCF8574 expander isr processing processing. @note The minimum size is 2048 bytes. uint8_t stack_size; // Stack size for task for the PCF8574 expander isr processing processing. @note The minimum size is 124 byte.
uint8_t i2c_address; // Expander I2C address. uint8_t i2c_address; // Expander I2C address.
bool p0_gpio_work_mode; // Expander GPIO PO work mode. True for input, false for output. bool p0_gpio_work_mode; // Expander GPIO PO work mode. True for input, false for output.
bool p1_gpio_work_mode; // Expander GPIO P1 work mode. True for input, false for output. bool p1_gpio_work_mode; // Expander GPIO P1 work mode. True for input, false for output.
@@ -81,8 +81,6 @@ extern "C"
* @param[in] handle Pointer to unique PCF8574 handle. * @param[in] handle Pointer to unique PCF8574 handle.
* @param[out] reg Pointer to GPIO's status. * @param[out] reg Pointer to GPIO's status.
* *
* @note For input GPIO's status will be 1 (HIGH) always.
*
* @return AVR_OK if success or an error code otherwise. * @return AVR_OK if success or an error code otherwise.
*/ */
avr_err_t zh_avr_pcf8574_read(zh_avr_pcf8574_handle_t *handle, uint8_t *reg); avr_err_t zh_avr_pcf8574_read(zh_avr_pcf8574_handle_t *handle, uint8_t *reg);
@@ -115,8 +113,6 @@ extern "C"
* @param[in] gpio GPIO number. * @param[in] gpio GPIO number.
* @param[out] status Pointer to GPIO status (true - HIGH, false - LOW). * @param[out] status Pointer to GPIO status (true - HIGH, false - LOW).
* *
* @note For input GPIO's status will be 1 (HIGH) always.
*
* @return AVR_OK if success or an error code otherwise. * @return AVR_OK if success or an error code otherwise.
*/ */
avr_err_t zh_avr_pcf8574_read_gpio(zh_avr_pcf8574_handle_t *handle, uint8_t gpio, bool *status); avr_err_t zh_avr_pcf8574_read_gpio(zh_avr_pcf8574_handle_t *handle, uint8_t gpio, bool *status);
@@ -134,6 +130,11 @@ extern "C"
*/ */
avr_err_t zh_avr_pcf8574_write_gpio(zh_avr_pcf8574_handle_t *handle, uint8_t gpio, bool status); avr_err_t zh_avr_pcf8574_write_gpio(zh_avr_pcf8574_handle_t *handle, uint8_t gpio, bool status);
/**
* @brief PCF8574 ISR handler.
*/
void zh_avr_pcf8574_isr_handler(void);
#ifdef __cplusplus #ifdef __cplusplus
} }
#endif #endif

1
zh_avr_pcf8574.c
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@@ -9,7 +9,6 @@ static zh_avr_vector_t _vector = {0};
static avr_err_t _zh_avr_pcf8574_validate_config(const zh_avr_pcf8574_init_config_t *config); static avr_err_t _zh_avr_pcf8574_validate_config(const zh_avr_pcf8574_init_config_t *config);
static avr_err_t _zh_avr_pcf8574_configure_i2c_device(const zh_avr_pcf8574_init_config_t *config, zh_avr_pcf8574_handle_t *handle); static avr_err_t _zh_avr_pcf8574_configure_i2c_device(const zh_avr_pcf8574_init_config_t *config, zh_avr_pcf8574_handle_t *handle);
static avr_err_t _zh_avr_pcf8574_configure_interrupts(const zh_avr_pcf8574_init_config_t *config, zh_avr_pcf8574_handle_t handle); static avr_err_t _zh_avr_pcf8574_configure_interrupts(const zh_avr_pcf8574_init_config_t *config, zh_avr_pcf8574_handle_t handle);
extern void zh_avr_pcf8574_isr_handler(void);
static void _zh_avr_pcf8574_isr_processing_task(void *pvParameter); static void _zh_avr_pcf8574_isr_processing_task(void *pvParameter);
static avr_err_t _zh_avr_pcf8574_read_register(zh_avr_pcf8574_handle_t *handle, uint8_t *reg); static avr_err_t _zh_avr_pcf8574_read_register(zh_avr_pcf8574_handle_t *handle, uint8_t *reg);
static avr_err_t _zh_avr_pcf8574_write_register(zh_avr_pcf8574_handle_t *handle, uint8_t reg); static avr_err_t _zh_avr_pcf8574_write_register(zh_avr_pcf8574_handle_t *handle, uint8_t reg);