topic Re: iMX8M PLUS UART1 not working in i.MX Processors

iMX8M PLUS UART1 not working

swapnilturambekar — Thu, 24 Feb 2022 06:28:28 GMT

Hi All,

I am working on custom board based on iMX8M Plus processor and I want to use UART1 as a communication uart between 2 boards. But I am unable to receive anything on that uart1. Do I need to change anything in .dts file?

I wrote a sample code (application) to receive through uart1.

I am getting "imx-uart 30860000.serial: We cannot prepare for the RX slave dma!" this type of error while running the application.

I changed CONFIG_IMX_SDMA=y to CONFIG_IMX_SDMA=m still it not work.

can anyone please help me here?

Thanks

Re: iMX8M PLUS UART1 not working

tamo2 — Mon, 10 Apr 2023 22:47:43 GMT

I am getting the exact same error "We cannot prepare for the RX slave dma" built using Kirkstone. Have you been able to solve the issue?

Re: iMX8M PLUS UART1 not working

Olivier_B — Sat, 14 Oct 2023 19:28:03 GMT

@tamo2 @swapnilturambekar , I'm am getting the exact same error on Kirkstone on an imx8mm. It seems to be generate when we get framing errors while using the DMA. Have you fix the issue?

Re: iMX8M PLUS UART1 not working

tamo2 — Sun, 15 Oct 2023 06:38:28 GMT

My memory is a bit vague but I think we worked around the issue by building the SDMA as a module instead of built-in to kernel.

Re: iMX8M PLUS UART1 not working

gigli_korg — Fri, 26 Jan 2024 10:45:13 GMT

which kernel version is/was based your project?