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't have
> 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
Hi,
when I bought some stuff from Seeedstudio last time, I added a Longan Nano to
the purchase since it was really cheap and wanted to give it a try. I played
around with it for a few days and managed to get some basic support for NuttX,
but it seems either the core has some issues during debug
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
Hi all,
STM32f405rg custom board - MTD on SPI1 and SD card on SPI2.
MTD on SPI1 works without DMA and with if defined CONFIG_STM32_SPI1_DMA=y
but if also
CONFIG_STM32_SPI1_DMA_BUFFER=1024
is set, partitions get created, there are mtdblockX in /dev, geometry can
be read correctly, but reading or
