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串口打印检测一段时间就会停止



CPU   OMAP35XXDCUS 芯片  接2片DDR2  软件在SD卡连芯片口,在系统运行后一段时间,用UR 口 串口检测,RX 会停止,是什么原因,有什么办法解决。测量电压正常。kill部分软件就会正常。什么现象?

请教!