Re: STM32 LL SPI driver

Marti Bolivar <marti.bolivar@...>

Hi Matthias,

Thank you for your reply.

I cannot reproduce the issue here.

On 96b_carbon (STM32F4 based), with my series, CS GPIO is glitch free when testing with tests/drivers/spi/spi_loopback. Analog looks good too; typical waveform looks like this:

Do you have any repro steps I could try? Can you take an analog trace to see if perhaps there's a signal quality issue on your board?


On 1 August 2017 at 10:12, Matthias Bösl <matthias.boesl@...> wrote:
Hi Marti,

tested with and without your patch, same behavior with both versions



On Tue, Aug 1, 2017 at 4:08 PM Marti Bolivar <marti.bolivar@...> wrote:
Hi Matthias,


On 1 August 2017 at 02:56, Matthias Bösl <matthias.boesl@...> wrote:
I'm about porting the enc28j60 to the new SPI driver (stm32f4 + CS GPIO pin), after some debugging, I found the CS pin seems to go high for a very short time in between a transaction, did anyone observe similar behavior?

screenshot attached


MatthiasScreenshot from 2017-08-01 08-15-57.png

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