imx6 sabre smart devices board unable to send a signal when uart2 tx transport text for minicom

[陳冠儒]

hi,all:

why imx6 sabre smart devices board unable to send a signal when uart2 tx  transport text for minicom?

cpu can not send uart2_tx signal  to other side (pc end),but uart5、4、1 can.

Other:

android after boot uart3_tx can send signal  to drive GPS's tx (uart2_tx、uart3_tx set of 3.3V pin，uart1_tx、uart4_tx、uart5_tx set of 1.8V pin).

Might be power problems?

please help me,thanks.

(中譯:為何imx6 sabre smart devices board的uart2_tx不能由minicom 送出文字到另一邊(PC端)，也就是cpu的uart2_tx信號完全無信號發出.

          但uart1、4、5卻是可以發出信號.

          其他:

          android 開機後，uart3_tx 卻能送信號去驅動GPS，不過是否是電壓問題呢?uart2_tx、uart3_tx 是設定在 3.3V pin，uart1_tx、uart4_tx、uart5_tx 是設定在1.8V pin)

)

[igorpadykov · Accepted solution]

Hi 陳 冠

I think you can check iomux settings for uart signals, also please

refer to atatched Porting Guide Chapter 3 Registering a New UART Driver.

Also one can try to decrease uart baudrate.

Best regards

igor

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[陳冠儒]

hi,igorpadykov:

thanks for your help.

I have solved this problem, because I use to repeat the GPIO PIN setting, making it impossible to send data.

thanks!!!