topic mx6q_sabresd_config UART2 abnormal in i.MX Processors

mx6q_sabresd_config UART2 abnormal

liuyonggang — Thu, 26 Oct 2017 02:24:19 GMT

board:mx6q_sabresd_config.

The UART2 is dead(It cann't connect terminal and UART2 tx send a byte data continously.),when imx6q UART2 recieves a error data which includes a start bit,8 bits data,no parity,no stop bit.Meanwhile "reboot" command is ineffective,"reboot -f" works. UART2 works normally,after rebooting the system via "reboot -f".

I do some work.I reconfigure the register corressponding to UART2(use devmem command) ,when above the problem happens.But it didn't works.I check FRAERREN of UART2_UCR3 disabled.I didn't know why this happened.

Another question,how to enable UART2 frame error interrupt in UART driver .

Re: mx6q_sabresd_config UART2 abnormal

igorpadykov — Thu, 26 Oct 2017 23:03:40 GMT

Hi liu

please check uart2 example in linux/arch/arm/boot/dts/imx6sx-sabreauto.dts
http://git.freescale.com/git/cgit.cgi/imx/linux-imx.git/tree/arch/arm/boot/dts/imx6sx-sabreauto.dts?h=imx_4.1.15_2.0.0_ga&id=rel_imx_4.1.15_2.0.0_ga

Try with official nxp bsps described on

i.MX 6 / i.MX 7 Series Software and Development Tool|NXP

Best regards
igor
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Re: mx6q_sabresd_config UART2 abnormal

liuyonggang — Fri, 27 Oct 2017 01:32:49 GMT

Hi igorpadykov,

Thanks for your responds.I donn't use imx6sx-sabreauto.dts,but thank you all the same.

Best regards!

Johnny liu.