gpio__expander_8h_source.html

#pragma once


#include "esp_err.h"

#include "driver/i2c_master.h"

#include <stdbool.h>

#include <stdint.h>


esp_err_t gpio_expander_init(i2c_master_bus_handle_t bus);


esp_err_t gpio_expander_set(uint8_t channel, bool level);


esp_err_t gpio_expander_get(uint8_t channel, bool *level);


esp_err_t gpio_expander_read_all(uint8_t *inputs);


gpio_expander_set
esp_err_t gpio_expander_set(uint8_t channel, bool level)
Drive one output channel (read-modify-write of the cached output port).
Definition gpio_expander.c:54

gpio_expander_init
esp_err_t gpio_expander_init(i2c_master_bus_handle_t bus)
Attach the expander to the shared I2C bus and set pin directions.
Definition gpio_expander.c:38

gpio_expander_get
esp_err_t gpio_expander_get(uint8_t channel, bool *level)
Read one input channel's logic level.
Definition gpio_expander.c:61

gpio_expander_read_all
esp_err_t gpio_expander_read_all(uint8_t *inputs)
Read all 8 input-port levels in one transaction.
Definition gpio_expander.c:70