【AT-START-F423测评】+ I2C接口测试加速度传感器ADXL345

void drv_i2c_gpio_init( void )

{

    gpio_init_type gpio_initstructure;

    

    /* i2c periph clock enable */

    crm_periph_clock_enable(CRM_I2C1_PERIPH_CLOCK, TRUE);

    crm_periph_clock_enable(CRM_GPIOB_PERIPH_CLOCK, TRUE);

    

    /* configure i2c pins: SCL=PB8,SDA=PB9 */

    gpio_initstructure.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;

    gpio_initstructure.gpio_mode           = GPIO_MODE_MUX;

    gpio_initstructure.gpio_out_type       = GPIO_OUTPUT_OPEN_DRAIN;

    gpio_initstructure.gpio_pull           = GPIO_PULL_UP;

    gpio_initstructure.gpio_pins           = GPIO_PINS_8 | GPIO_PINS_9;

    gpio_init(GPIOB, &gpio_initstructure);

    

    /* gpio configuration */

    gpio_pin_mux_config(GPIOB, GPIO_PINS_SOURCE8, GPIO_MUX_4);

    gpio_pin_mux_config(GPIOB, GPIO_PINS_SOURCE9, GPIO_MUX_4);

    

    hi2cx.i2cx = I2C1;

    i2c_reset(I2C1);

    /* config i2c */

    i2c_init(I2C1, 0x0F, I2Cx_CLKCTRL);

    i2c_own_address1_set(I2C1, I2C_ADDRESS_MODE_7BIT, 0XB0);

    i2c_enable(I2C1,TRUE);

}

uint8_t I2C_WriteByte(uint8_t index,uint8_t dev_addr, uint8_t addr,uint8_t Byte)

{

    uint8_t reVal;

    reVal = i2c_memory_write(&hi2cx, I2C_MEM_ADDR_WIDIH_8, dev_addr<<1, addr, &Byte, 1, 10000);

    return reVal;

}



uint8_t I2C_ReadByte(uint8_t index,uint8_t dev_addr, uint8_t addr)

{

    uint8_t reVal;

    i2c_memory_read(&hi2cx, I2C_MEM_ADDR_WIDIH_8, dev_addr<<1, addr, &reVal, 1, 10000);

    return reVal;

}





uint8_t I2C_PageWrite(uint8_t index,uint8_t dev_addr, uint8_t addr,uint8_t *str,uint32_t num)

{

    uint8_t reVal;

    reVal = i2c_memory_write(&hi2cx, I2C_MEM_ADDR_WIDIH_8, dev_addr<<1, addr, str, num, 10000);

    return reVal;

}



uint8_t I2C_PageRead(uint8_t index,uint8_t dev_addr, uint8_t addr,uint8_t *str,uint32_t num)

{

    uint8_t reVal;

    reVal = i2c_memory_read(&hi2cx, I2C_MEM_ADDR_WIDIH_8, dev_addr<<1, addr, str, num, 10000);

    return reVal;

}