GD32F303 三线SPI 的问题

只看该作者 · 2022-6-24 12:29

本帖最后由 1348853047 于 2022-6-24 14:04 编辑

这是读寄存器的逻辑，目前是能读到数据，但是会有数据跳动，所以有调试过的大神帮忙指点一下。

#define IMU_CURRENT_SPI SPI2

#define READ_MODE spi_disable(IMU_CURRENT_SPI); \
                  spi_bidirectional_transfer_config(IMU_CURRENT_SPI, SPI_BIDIRECTIONAL_RECEIVE); \
                  spi_enable(IMU_CURRENT_SPI);

#define WRITE_MODE  spi_disable(IMU_CURRENT_SPI); \
                  spi_bidirectional_transfer_config(IMU_CURRENT_SPI, SPI_BIDIRECTIONAL_TRANSMIT); \
                  spi_enable(IMU_CURRENT_SPI);

uint8_t BMI160_Read_Reg(uint8_t reg)
{
      uint8_t data = 0;
      uint8_t Retry = 0;


      WRITE_MODE;
      /* select the flash: chip select low */
      SPI2_CS_LOW();

      IMU_SPI2_WriteByte(reg|0x80);                               // 读寄存器时序


      READ_MODE;
      while(RESET == spi_i2s_flag_get(IMU_CURRENT_SPI, SPI_FLAG_RBNE))
      {
            if(++Retry > 200) return 0;
      }

      data = spi_i2s_data_receive(IMU_CURRENT_SPI);
      SPI2_CS_HIGH();


      WRITE_MODE;
      //data = spi_i2s_data_receive(IMU_CURRENT_SPI);
      while(spi_i2s_flag_get(IMU_CURRENT_SPI, SPI_FLAG_TRANS))
      {
            if(++Retry > 200) return 0;
      }


      return data;
}

只看该作者 · 2022-6-24 13:48

有做过三线SPI的，还请指点一下下