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am4378 sd卡启动出错

Other Parts Discussed in Thread: AM4378, TPS65218, AM4379

第一次搞am4378,新做的板子,使用SD卡启动,用终端得到的打印信息如下:

U-Boot SPL 2013.10-svn19 (Feb 05 2015 - 16:49:23)

U-Boot SPL 2013.10-svn19 (Feb 05 2015 - 16:49:23)

U-Boot SPL 2013.10-svn19 (Feb 05 2015 - 16:49:23)

U-Boot SPL 2013.10-svn19 (Feb 05 2015 - 16:49:23)

U-Boot SPL 2013.10-svn19 (Feb 05 2015 - 16:49:23)

U-Boot SPL 2013.10-svn19 (Feb 05 2015 - 16:49:23)

每隔几秒就出现一条U-Boot SPL 2013.10-svn19 (Feb 05 2015 - 16:49:23)

想知道问题大概出在哪里,