iMX53 UART data lost when receiving

charleshuang — Thu, 23 Apr 2015 07:44:38 GMT

Hi,

Is there any theory to explain why data lost when receiving.

TEST : (10 times)

Rx(iMX53)

# stty -F /dev/ttymxc2 speed 115200 -echo

# cat /dev/ttymxc2 > result.txt

Tx(PC): transfer one text file that contains 10000 characters.

FAILED : The size of result.txt is about 2000 ~ 4000 bytes.

Re: iMX53 UART data lost when receiving

igorpadykov — Thu, 23 Apr 2015 08:19:47 GMT

Hi charles

data may be lost due to UART RX buffer overflow,

since processor is busy on other tasks.

One can try to decrease processor load or try to use SDMA

with UART (this may alleviate problem but may not provide full guarantee).

Best regards

igor

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