Hello,
I am using STM32F4 discovery + libopencm3. I cannot confirm this issue.
The USARTs run without any problem. I've tried it with and without DMA,
however, i've never used USART 6.
Did you make sure none of the disocovery-board peripherals uses the same
pins your USART is configured to use? (LIS302DL, ...?)
Best regards
Philipp
On 22.09.2013 08:57, Ken Sarkies wrote:
> On 22/09/13 15:06, Chuck McManis wrote:
>> So when ever I reset my board I get 'junk' that comes out of my
>> serial port. I've not quite gotten to the point where I can capture
>> it on my scope yet but its annoying.
>>
>> I've been using the STM32F4-Discovery board, USART6 in this case, and
>> something during my reset sequence seems to generate junk before
>> stuff that I send for "real" actually appears. Wondering if anyone
>> else had seen that?
> Not sure if I can be helpful or a nuisance. I can only verify it
> doesn't happen on the STM32F103 boards I have. Capturing it would tell
> if it comes during or after the reset. A single glitch or down
> transition could be interpreted as a start bit. Do you have hardware
> drivers? Are you seeing it on the CRO or receiving it? A good serial
> debug tool might be helpful to see what it contains if you don't have
> a storage CRO. If it's important to your application I don't mind
> checking it out on Tuesday and see if it's a "feature" of those boards.
>
> Ken
>>
>> --Chuck
>>
>>
>>
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