ChibiOS Free Embedded RTOS

MCU: stm32F411cEu6
OS: Chibios RT 19.1.2
File: ChibiOS_19.1.2\os\hal\ports\STM32\STM32F4xx\stm32_rcc.h
Row: 432
Code: #define rccEnableBKPSRAM(lp) rccEnableAHB1(RCC_AHB1ENR_BKPSRAMEN, lp)

Datasheet shows no RCC_AHB1ENR_BKPSRAMEN bit in register RCC_AHB1ENR.

Fix suggestion:

#ifdef RCC_AHB1ENR ...

OS: chibios v 17.6.0
MCU: stm32f072c8t6
Board: custom
DMA1_STREAM5 used for SPI2 TX, Transmission Complete interrupt required
DMA1_STREAM7 used for USART3 TX, Transmission Complete interrupt NOT required

If Stream7 initialized before Stream5, TC IRQ of Stream5 does not fire.
If Stream5 initialized ...

Sorry, I was wrong: when STM32_OTG_SEQUENCE_WORKAROUND defined, everything works without disabling the assert.
When STM32_OTG_SEQUENCE_WORKAROUND undefined, assert fires at state USB_EP0_IN_SENDING_STS.

Removing assert at line 950 (osalDbgAssert(false, "EP0 state machine error");) fixed the problem, everything works smoothly.
Vinz, yes, I have replaced stm32_registry.h with file from trunk, STM32_OTG_SEQUENCE_WORKAROUND is defined there.

I have changed line 1006 in hal_usb_lld.c, setting value to 1 and 0 with same result: EP0 state machine error at receiving mentioned "A1..." packet.

I checked out the trunk and replaced next files in my project:

hal_usb.h
hal_usb.c
hal_usb_cdc.h
hal_usb_lld.h
hal_usb_lld.c
stm32_otg.h

After that, Usb Serial was successfully found by host, but at the moment of connection I have "EP0 state machine error" assert fired.
I have hardware USB ...

I am ready to check everything on my system, how can I get mentioned files?

For me, patch #2 without disabling assert inside _usb_ep0out makes Serial-over-USB working. I tried -Os, -O2, -O0 with success.
Hardware: custom board with stm32L476RCT6
Firmware: chibios 17.6
Host: Windows 8.1 64bit

I found same topic in user projects, but it seems that thread workspace has changed since 2011, and mentioned solution outputs something weird.

stm32l151c8, Chibios v 17.6.0

Here is the code I use now (it is definitely something wrong in boundaries). What is wrong?

uint32_t GetThdFreeStack(void ...

I use self-written clock control subsystem (Chibios sets clock at start - once and forever, but in my projects clock switching is often required).
And every time after new version arrival I have to remove original clock init subsystem.
Personally, it would be very convinient to disable clock init ...