ilto:ev.m...@gmail.com]
> Sent: Wednesday, November 25, 2020 12:46 AM
> To: dev@nuttx.apache.org
> Subject: Re: STM32F4 SPI DMA buffer size issue
>
> Thanks for the enhanced feedback, David!
>
> When I reduced the slew rate control from 50MHz to 2MHz it fixes issues
> with a SD
: Wednesday, November 25, 2020 12:46 AM
To: dev@nuttx.apache.org
Subject: Re: STM32F4 SPI DMA buffer size issue
Thanks for the enhanced feedback, David!
When I reduced the slew rate control from 50MHz to 2MHz it fixes issues
with a SD card when DMA is not enabled. But when DMA is enabled, MTD and
> Hi Oleg,
>
> See inline [DBS]
>
> David
> -Original Message-
> From: Oleg Evseev [mailto:ev.m...@gmail.com]
> Sent: Tuesday, November 24, 2020 9:46 AM
> To: dev@nuttx.apache.org
> Subject: Re: STM32F4 SPI DMA buffer size issue
>
> > Have you scoped the
Hi Oleg,
See inline [DBS]
David
-Original Message-
From: Oleg Evseev [mailto:ev.m...@gmail.com]
Sent: Tuesday, November 24, 2020 9:46 AM
To: dev@nuttx.apache.org
Subject: Re: STM32F4 SPI DMA buffer size issue
> Have you scoped the interface?
You mean a bus by analyzer? No, I don
> Have you scoped the interface?
You mean a bus by analyzer? No, I don't have such ability for now.
For SD card I tried to reduce the SPI frequency from 24MHz to 10MHz, but it
didn't help when DMA is enabled. In fact it get failed to find a valid boot
record, while fat_hwread of sector zero is re
Oleg,
Have you scoped the interface?
For gins and giggles try reducing the SPI clock drive strength. Step it down
and retest.
David
-Original Message-
From: Oleg Evseev [mailto:ev.m...@gmail.com]
Sent: Tuesday, November 24, 2020 4:57 AM
To: dev@nuttx.apache.org
Subject: STM32F4 SPI DMA
