[AT32F407] i2c总是检测忙碌状态，重映射问题？

i2c_status_type i2c_master_transmit(i2c_handle_type* hi2c, uint16_t address, uint8_t* pdata, uint16_t size, uint32_t timeout)

{

        volatile int test;

  /* initialization parameters */

  hi2c->pbuff = pdata;

  hi2c->pcount = size;



  hi2c->error_code = I2C_OK;



  /* wait for the busy flag to be reset */

  if(i2c_wait_flag(hi2c, I2C_BUSYF_FLAG, I2C_EVENT_CHECK_NONE, timeout) != I2C_OK)

  {

                test = gpio_input_data_bit_read(GPIOA,GPIO_PINS_8);

                test = gpio_input_data_bit_read(GPIOB,GPIO_PINS_4);

    return I2C_ERR_STEP_1;

  }



  /* ack acts on the current byte */

  i2c_master_receive_ack_set(hi2c->i2cx, I2C_MASTER_ACK_CURRENT);



  /* send slave address */

  if(i2c_master_write_addr(hi2c, address, timeout) != I2C_OK)

  {

    /* generate stop condtion */

    i2c_stop_generate(hi2c->i2cx);



    return I2C_ERR_STEP_2;

  }



  /* clear addr flag */

  i2c_flag_clear(hi2c->i2cx, I2C_ADDR7F_FLAG);



  while(size > 0)

  {

    /* wait for the tdbe flag to be set */

    if(i2c_wait_flag(hi2c, I2C_TDBE_FLAG, I2C_EVENT_CHECK_ACKFAIL, timeout) != I2C_OK)

    {

      /* generate stop condtion */

      i2c_stop_generate(hi2c->i2cx);



      return I2C_ERR_STEP_3;

    }



    /* write data */

    i2c_data_send(hi2c->i2cx, (*pdata++));

    size--;

  }



  /* wait for the tdc flag to be set */

  if(i2c_wait_flag(hi2c, I2C_TDC_FLAG, I2C_EVENT_CHECK_ACKFAIL, timeout) != I2C_OK)

  {

    /* generate stop condtion */

    i2c_stop_generate(hi2c->i2cx);



    return I2C_ERR_STEP_4;

  }



  /* generate stop condtion */

  i2c_stop_generate(hi2c->i2cx);



  return I2C_OK;

}

void wk_i2c3_init(void)

{

  /* add user code begin i2c3_init 0 */

        volatile uint32_t* reg_addr = (volatile uint32_t*)0x40010028;

        volatile uint32_t value_after_setting;

  /* add user code end i2c3_init 0 */



  gpio_init_type gpio_init_struct;



  gpio_default_para_init(&gpio_init_struct);



  /* add user code begin i2c3_init 1 */

  gpio_pin_remap_config(I2C3_GMUX_0001, TRUE);



  /* add user code end i2c3_init 1 */



  /* configure the SCL pin */

  gpio_init_struct.gpio_out_type = GPIO_OUTPUT_OPEN_DRAIN;

  gpio_init_struct.gpio_pull = GPIO_PULL_NONE;

  gpio_init_struct.gpio_mode = GPIO_MODE_MUX;

  gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_MODERATE;

  gpio_init_struct.gpio_pins = GPIO_PINS_8;

  gpio_init(GPIOA, &gpio_init_struct);



  /* configure the SDA pin */

  gpio_init_struct.gpio_out_type = GPIO_OUTPUT_OPEN_DRAIN;

  gpio_init_struct.gpio_pull = GPIO_PULL_NONE;

  gpio_init_struct.gpio_mode = GPIO_MODE_MUX;

  gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_MODERATE;

  gpio_init_struct.gpio_pins = GPIO_PINS_4;

  gpio_init(GPIOB, &gpio_init_struct);





  i2c_init(I2C3, I2C_FSMODE_DUTY_2_1, 100000);

  i2c_own_address1_set(I2C3, I2C_ADDRESS_MODE_7BIT, 0x0);

  i2c_ack_enable(I2C3, TRUE);

  i2c_clock_stretch_enable(I2C3, TRUE);

  i2c_general_call_enable(I2C3, FALSE);



  /* add user code begin i2c3_init 2 */



  /* add user code end i2c3_init 2 */



  i2c_enable(I2C3, TRUE);



  /* add user code begin i2c3_init 3 */

        value_after_setting = *reg_addr;

        value_after_setting = *reg_addr;

  /* add user code end i2c3_init 3 */

}

void wk_periph_clock_config(void)

{

  /* enable iomux periph clock */

  crm_periph_clock_enable(CRM_IOMUX_PERIPH_CLOCK, TRUE);



  /* enable gpioa periph clock */

  crm_periph_clock_enable(CRM_GPIOA_PERIPH_CLOCK, TRUE);



  /* enable gpiob periph clock */

  crm_periph_clock_enable(CRM_GPIOB_PERIPH_CLOCK, TRUE);



  /* enable i2c3 periph clock */

  crm_periph_clock_enable(CRM_I2C3_PERIPH_CLOCK, TRUE);

        

        /* enable gpioe periph clock */

  crm_periph_clock_enable(CRM_GPIOE_PERIPH_CLOCK, TRUE);



        /* enable spi4 periph clock */

  crm_periph_clock_enable(CRM_SPI4_PERIPH_CLOCK, TRUE);

}