examples/peripherals/i2c/i2c_self/main/xf_main.c

xf_hal i2c 自测示例。

 
/* ==================== [Includes] ========================================== */
 
#include "xf_hal.h"
 
/* ==================== [Defines] =========================================== */
 
#define TAG "i2c_self"
 
#define DEFAULT_I2C_MASTER_NUM          1
#define DEFAULT_I2C_MASTER_SCL_IO_NUM   19
#define DEFAULT_I2C_MASTER_SDA_IO_NUM   18
#define DEFAULT_I2C_MASTER_DEV_ADDR     0x23
#define DEFAULT_I2C_MASTER_FREQ         400*1000
 
#define DEFAULT_I2C_SLAVE_NUM          0
#define DEFAULT_I2C_SLAVE_SCL_IO_NUM   5
#define DEFAULT_I2C_SLAVE_SDA_IO_NUM   4
#define DEFAULT_I2C_SLAVE_DEV_ADDR     0x23
#define DEFAULT_I2C_SLAVE_FREQ         400*1000
 
/* ==================== [Typedefs] ========================================== */
 
/* ==================== [Static Prototypes] ================================= */
 
static void i2c_slave_init(void);
static void i2c_master_init(void);
static void i2c_echo(void);
 
/* ==================== [Static Variables] ================================== */
 
/* ==================== [Macros] ============================================ */
 
/* ==================== [Global Functions] ================================== */
 
void xf_main(void)
{
    i2c_slave_init();
    i2c_master_init();
    i2c_echo();
}
 
/* ==================== [Static Functions] ================================== */
 
static void i2c_slave_init(void)
{
    xf_hal_i2c_init(DEFAULT_I2C_SLAVE_NUM, XF_HAL_I2C_HOSTS_SLAVE, DEFAULT_I2C_SLAVE_FREQ);
    xf_hal_i2c_set_gpio(DEFAULT_I2C_SLAVE_NUM,
                        DEFAULT_I2C_SLAVE_SCL_IO_NUM, DEFAULT_I2C_SLAVE_SDA_IO_NUM);
    xf_hal_i2c_set_address(DEFAULT_I2C_SLAVE_NUM, DEFAULT_I2C_SLAVE_DEV_ADDR);
    xf_hal_i2c_enable(DEFAULT_I2C_SLAVE_NUM);
}
 
static void i2c_master_init(void)
{
    xf_hal_i2c_init(DEFAULT_I2C_MASTER_NUM, XF_HAL_I2C_HOSTS_MASTER, DEFAULT_I2C_MASTER_FREQ);
    xf_hal_i2c_set_gpio(DEFAULT_I2C_MASTER_NUM,
                        DEFAULT_I2C_MASTER_SCL_IO_NUM, DEFAULT_I2C_MASTER_SDA_IO_NUM);
    xf_hal_i2c_set_address(DEFAULT_I2C_MASTER_NUM, DEFAULT_I2C_MASTER_DEV_ADDR);
    xf_hal_i2c_enable(DEFAULT_I2C_MASTER_NUM);
}
 
static void i2c_echo(void)
{
    uint8_t msg[] = "hello";
    uint8_t recv[sizeof(msg)] = {0};
    xf_hal_i2c_write(DEFAULT_I2C_MASTER_NUM, msg, sizeof(msg), 0);
    xf_hal_i2c_read(DEFAULT_I2C_SLAVE_NUM, recv, sizeof(msg), 0);
    XF_LOGI(TAG, "recv:%s", recv);
}