Hi,
here is the pull request:
https://github.com/apache/nuttx/pull/11871
My initial comments (and "fix") for uart_xmitchars_dma() are no longer
relevant. Hence, those changes are no longer included.
Regards
Kian
From: Sebastien Lorquet
Sent: 08 March 2024 11:13
Hello,
Yes, stm32h7 uart transmission has issues. You can easily test this in
nsh with just an echo command and a very long string, eg > 64 ascii
chars. At first I believed it was buffering problems.
This caused me some headaches 1.5 years ago, but the DMA serial driver
is too complex for me
Hi Kian,
The Problem with the semaphore is it cause blocking when the port
is opened non blocking.
Please do PR so we can review it.
David
-Original Message-
From: Kian Karas (KK)
Sent: Friday, March 8, 2024 4:18 AM
To: dev@nuttx.apache.org
Subject: STM32H7 serial
Hi community
The STM32H7 serial driver TX DMA logic is no longer working properly.
The issues started with commit 660ac63b. Subsequent attempts (f92a9068,
6c186b60) have failed to get it working again.
I think the original idea of 660ac63b is right, it just failed to restart TX
DMA upon TX DMA
