imx6ull evk - ttymxc1 loopback test is successful but read() always returns -1

[sneha_raghunand]

I am using the IMX6ull evk i.MX 6ULL Applications Processor | Single Arm® Cortex®-A7 @ 900 MHz |NXP 

I am trying to read the uart ttymxc1 and it was working fine till yesterday. Today, the same piece of code, with read() function returns -1 always.

I performed a loopback test to check the functionality of uart and the test is successful. Can you please help me on this ?

Edit: The read() function fails in both DMA and interrupt mode (tested spearately)

Thank you !

[igorpadykov]

Hi Sneha

probably sd card image become corrupted, one can try to reprogram image with

Demo Images from link

i.MX Software|NXP 

Best regards
igor
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[sneha_raghunand]

Hello Igor,

Thank you ! It worked. Do you know what could have caused the image to be corrupted ?

[igorpadykov]

Hi Sneha

it may become corrupted if power was suddenly removed

(not using linux poweroff).

Best regards
igor

[sneha_raghunand]

Hi Igor,

Thank you ! The answer made sense to the situation that I had encountered