Hello everyone.
I have DART-MX8M-MINI Evaluation Kit. And I want to send something via USART.
USART3 is free on this board.
I enabled USART3 in device tree. And when I am trying this cmd:
stty -F /dev/ttymxc2 -echo -onlcr 115200
I had got this:
[ 232.697916] imx-sdma 30bd0000.dma-controller: sdma firmware not ready!
[ 232.704455] imx-uart 30880000.serial: We cannot prepare for the RX slave dma!
[ 232.711815] imx-sdma 30bd0000.dma-controller: sdma firmware not ready!
[ 232.718351] imx-uart 30880000.serial: We cannot prepare for the TX slave dma!
I can’t transmit or receive bytes.
What I am doing wrong?
I tried to change status dma in device tree but this did not help me.
I am using Debian 10.6 and Linux imx8mm-var-dart 4.19.35.
Build image by this instructions:
https://variwiki.com/index.php title=Debian_Build_Release&release=RELEASE_BUSTER_V2.1_DART-MX8M-MINI
Hi user4users
for uart usage for that board may be useful to look at
https://variwiki.com/index.php?title=DART-MX8M_UART&release=RELEASE_ZEUS_V1.1_DART-MX8M-MINI
In general this board was designed and supported by variscite, suggest to post issue on
its tech support https://www.variscite.com/support/
Best regards
igor