TI中文支持网ti 技术支持你们好。我在DM3730 mcbsp3 上连接了一个codec 。捕捉MIC ，通过MCBSP2 上的codec 播放 。
在执行 arecord -Dhw:0,1 -r48000 -f S16_LE -c 2 |aplay -Dhw:0,0 -r48000 后不停地出现
Playing WAVE 'stdin' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
underrun!!! (at least 12.725 ms long)
underrun!!! (at least 12.756 ms long)
underrun!!! (at least 12.725 ms long)
underrun!!! (at least 12.756 ms long)
underrun!!! (at least 12.756 ms long)
underrun!!! (at least 12.787 ms long)
underrun!!! (at least 12.665 ms long)
underrun!!! (at least 12.634 ms long)
underrun!!! (at least 12.726 ms long)
underrun!!! (at least 12.756 ms long)
underrun!!! (at least 12.756 ms long)
underrun!!! (at least 12.756 ms long)
underrun!!! (at least 12.756 ms long)
underrun!!! (at least 12.695 ms long)
underrun!!! (at least 12.756 ms long)
underrun!!! (at least 12.726 ms long)
underrun!!! (at least 12.726 ms long)
underrun!!! (at least 12.725 ms long)
underrun!!! (at least 12.726 ms long)
underrun!!! (at least 12.756 ms long)
underrun!!! (at least 12.726 ms long)
underrun!!! (at least 12.787 ms long)
underrun!!! (at least 12.665 ms long)
underrun!!! (at least 12.725 ms long)
underrun!!! (at least 12.787 ms long)
underrun!!! (at least 12.756 ms long)
underrun!!! (at least 12.756 ms long)
underrun!!! (at least 12.695 ms long)
underrun!!! (at least 12.726 ms long)
underrun!!! (at least 12.726 ms long)
underrun!!! (at least 12.787 ms long)
underrun!!! (at least 12.726 ms long)
underrun!!! (at least 12.695 ms long)
underrun!!! (at least 12.695 ms long)
underrun!!! (at least 12.787 ms long)
underrun!!! (at least 12.756 ms long)
underrun!!! (at least 12.695 ms long)
underrun!!! (at least 12.726 ms long)
underrun!!! (at least 12.725 ms long)
underrun!!! (at least 12.725 ms long)
underrun!!! (at least 12.757 ms long)
underrun!!! (at least 12.848 ms long)
underrun!!! (at least 12.695 ms long)
播放声音断断续续，这是怎么回事 ？是MCBSP3 的buffer 太小么？
Chris Meng：
你好，
是否有使用edma？如果有，可能是edma上搬移的东西太多，来不及搬移音频的数据。建议你调整一下mcbsp使用的edma的TC。
qigong du1：
回复 Chris Meng:
这处在驱动里面那处设置 ？
