i.MX8 UART baudrate mismatch

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i.MX8 UART baudrate mismatch

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Lincoln_Dessen
Contributor II

Dear all,

I have this strange baudrate issue in the product using i.MX8QM with Android 9.

ttyLP3 (UART3) default baudrate is 9600.

I run stty command setting it to 19200.

/ # stty -F /dev/ttyLP3
speed 19200 baud; line = 28;

However, the baudrate on uart bus measured from oscilloscope is only 5760 (please check the attachment below).

 

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Zhiming_Liu
NXP TechSupport
NXP TechSupport

Hi @Lincoln_Dessen 

Please try to test other baudrate using oscilloscope

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