ChibiOS Free Embedded RTOS

Giovanni wrote: Tue Jun 23, 2026 7:19 am Hi,

From our "sheriff" reviewer:

...

BTW, now it is also possible to submit PRs on the new github repository now (forum is still fine): https://github.com/chibios-upstream/chibios

Giovanni

Hi,
My apologies. I overlooked checking the lower layer.

Some host may request first two bytes of descriptor to check it size and then do full-size request.
Respect request wLenght


Subject: [PATCH] usb: truncate string descriptor response to match
setup.wLength

Windows requests the first 2 bytes of a string descriptor to read
its size before asking ...

Ok. I was looking at wrong place.

So this is totally my fault. I'm using STM32F7 which is actually Cortex M7 and it has caches.
We have big code-base and some of developers. So to avoid any cache-related issue I decided to add two wrapper to hal_serial_nor.c that are copying data to/from devp ...

Hi,

I think it is a good hypothesis, it would be possible to place temporary code and check the state of FIFOs before starting a transfer.

Giovanni
Hi,

Thanks, good idea!
I try adding following code to spi_lld_ignore, spi_lld_exchange and spi_lld_send right before enabling DMAs:
osalDbgAssert ...

Hi,

ChibiOS 21.11.x
I have a custom hw with STM32F767 and W25Q128 connected over SPI.
W25Q driver is based on serial_nor. Nothing special, just reworked micron_n25q.
I'm using MFS on this flash. Two banks of 512Kb.
After few write of big blob of data (25Kb) I got failure in verification code of mfs ...

__spi_wakeup_isr is called from __spi_isr_complete_code with msg = MSG_OK and from __spi_isr_error_code with msg = some error code(s). Pass this msg to osalThreadResumeI and further to thread.
@@ -378,7 +378,7 @@ do { \
*/
#define __spi_wakeup_isr(spip, msg) { \
osalSysLockFromISR ...

I just started porting the whole trunk HAL to 21.11.4, it could take some time because all differences but what you see in trunk now is what you will get in 21.11.4.

Giovanni
Hi.

Thanks you for your hard work!

Currently I'm stick with strange DMA/SPI issue while trying to make W25Q work ...

Hi,

Note that this has been "fixed" by adding a new SNOR framework called "xsnor" which addresses the problem with buffers and adds more features (multi-devices, devices detection mainly). If you are going to add new devices, perhaps, it is better to do that in "xsnor".

Patches to old serial-nor ...

Hi,

Looking at os/hal/lib/complex/serial_nor/hal_serial_nor.c/h code it seems to me that "nocache" feature is not fully finished/implemented. At least for SPI (not WSPI) mode: local buffers are used in few places to construct tx packets.
We need SPI driver for W25Q for RusEFI project, so I done ...