topic imx8dx The serial port uses 115200 baud rate garbled in i.MX Processors

imx8dx The serial port uses 115200 baud rate garbled

songhongliang — Mon, 08 Nov 2021 08:01:06 GMT

HI ,

I am using lpuart1 of imx8dx. When I set up and call lpuart1 in the app, if the baud rate is 57600, the communication can be normal. When the baud rate is 115200, garbled characters will appear. I don't know where is the problem, can you give me some help

thanks

Re: imx8dx The serial port uses 115200 baud rate garbled

igorpadykov — Mon, 08 Nov 2021 10:11:18 GMT

Hi Hongliang

reason may be uart timings, probably due to long cable/high capacitive load.

One can check it with oscilloscope using sect.4.10.15 UART I/O configuration and timing parameters

i.MX 8DualX Automotive and Infotainment Applications Processors

Best regards
igor