stm32cubemx stm32f4 i2s2 发送不能直接发送buffer1，buffer2的数据

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卡拉瓦乔|

楼主 | 2018-7-16 07:26 | 只看该作者回帖奖励

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buffer, STM32F4, STM32CubeMX, TE, AD

BUFF_MAX_SS=1024；

void Audio_Play(uint32_t I2S_AudioFreq)
{ uint16_t res,i=0;
      uint8_t buffer_switch = 1;
      XferCplt = 0;

      printf(&quot;Welcome to use UDA1380 I2S test:
&quot;);

//       UDA1380_Configuration();

      f_lseek(&fileR, WaveCounter);
f_read (&fileR, buffer1, BUFF_MAX_SS, &BytesRead);
f_read (&fileR, buffer2, BUFF_MAX_SS, &BytesRead);


      I2S_AudioFreq_Config(I2S_AudioFreq);
  /* Start playing wave */

      res=HAL_I2S_Transmit_DMA(&hi2s2,buffer1, BUFF_MAX_SS/2);

      printf(&quot;  >WaveDataLength : %fM
&quot;,(float)WaveDataLength/1000/1000);
      while(WaveDataLength != 0)
{
            while(XferCplt == 0)  //DMA传输完成中断里 XferCplt == 1
            {
                     /* wait for DMA transfert complete */
                     /* You can write some code for operate on UDA1380 */
            }
            XferCplt = 0;

            if(buffer_switch == 0)
            {
                     /* Play data from buffer1 */
                     HAL_I2S_Transmit_DMA(&hi2s2,buffer_ctl.tmp1, BUFF_MAX_SS);
                     /* Store data in buffer2 */
                     res=f_read (&fileR, buffer2, BUFF_MAX_SS, &BytesRead);
                     for(i=0;i<512;i++)
                     {
                              buffer_ctl.tmp2=buffer2;
                     }
                     buffer_switch = 1;
            }
            else
            {
                     /* Play data from buffer2 */
                     HAL_I2S_Transmit_DMA(&hi2s2,buffer_ctl.tmp2, BUFF_MAX_SS);
                     /* Store data in buffer1 */
                     res=f_read (&fileR, buffer1, BUFF_MAX_SS, &BytesRead);
                     for(i=0;i<512;i++)
                     {
                              buffer_ctl.tmp1=buffer1;
                     }
                     buffer_switch = 0;
            }
         if(BytesRead!=1024||res!=0)
            {
            break;
            }
      }
      printf(&quot;Transfer Complete
&quot;);
}

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stm32cubemx stm32f4 i2s2 发送不能直接发送buffer1，buffer2的数据

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