flipperzero-firmware/firmware/targets/api-hal-include/api-hal-i2c.h

#pragma once

#include <stdbool.h>
#include <stdint.h>
#include <api-hal-resources.h>

#ifdef __cplusplus
extern "C" {
#endif

/** Init I2C */
void api_hal_i2c_init();

/**
 * Perform I2C tx transfer
 * @param instance I2C_TypeDef instance
 * @param address I2C slave address
 * @param data pointer to data buffer
 * @param size size of data buffer
 * @param timeout timeout in CPU ticks
 * @return true on successful transfer, false otherwise
 */
bool api_hal_i2c_tx(
    I2C_TypeDef* instance,
    const uint8_t address,
    const uint8_t* data,
    const uint8_t size,
    uint32_t timeout);

/**
 * Perform I2C rx transfer
 * @param instance I2C_TypeDef instance
 * @param address I2C slave address
 * @param data pointer to data buffer
 * @param size size of data buffer
 * @param timeout timeout in CPU ticks
 * @return true on successful transfer, false otherwise
 */
bool api_hal_i2c_rx(
    I2C_TypeDef* instance,
    const uint8_t address,
    uint8_t* data,
    const uint8_t size,
    uint32_t timeout);

/**
 * Perform I2C tx and rx transfers
 * @param instance I2C_TypeDef instance
 * @param address I2C slave address
 * @param tx_data pointer to tx data buffer
 * @param tx_size size of tx data buffer
 * @param rx_data pointer to rx data buffer
 * @param rx_size size of rx data buffer
 * @param timeout timeout in CPU ticks
 * @return true on successful transfer, false otherwise
 */
bool api_hal_i2c_trx(
    I2C_TypeDef* instance,
    const uint8_t address,
    const uint8_t* tx_data,
    const uint8_t tx_size,
    uint8_t* rx_data,
    const uint8_t rx_size,
    uint32_t timeout);

/** Acquire I2C mutex */
void api_hal_i2c_lock();

/** Release I2C mutex */
void api_hal_i2c_unlock();

/**
 * With clause for I2C peripheral
 * @param type type of function_body
 * @param pointer pointer to return of function_body
 * @param function_body a (){} lambda declaration, executed with I2C mutex acquired
 */
#define with_api_hal_i2c(type, pointer, function_body)        \
    {                                                         \
        api_hal_i2c_lock();                                   \
        *pointer = ({ type __fn__ function_body __fn__; })(); \
        api_hal_i2c_unlock();                                 \
    }

#ifdef __cplusplus
}
#endif