ChibiOS Free Embedded RTOS

I doubt that this is ChibiOS-related, perhaps you could try a different crystal brand.

Giovanni
This issue seems to be resolved; it should be a pure hardware problem. I tried reducing the matching capacitance of the crystal (from 22PF to 18PF) to speed up the oscillation, and surprisingly, it ...

FYI #define BOARD_OTG_NOVBUSSENS has no effect on the internal STM32 boot loader (only on the ChibiOS driver).

AN2606 provides details on the internal STM32 boot loader.
See m
I expect from a quick look at AN2606 that you will need to have the VBUS pin connected for the STM32 boot loader to detect ...

Giovanni wrote:Hi,

You need to provide context, which device are you using?

Giovanni

I am using the STM32F405. I google a lot of articles and suspect that the slow startup of the HSE causes me to enter DFU mode without detecting the external crystal, which leads to USB enumeration failure.

I am debugging the DFU function, and when I pull BOOT0 high and BOOT1 low, the PC prompts an unknown USB device (device descriptor request failed). Currently, I have identified that the HSE is not oscillating, but it works normally during regular startup. I am not sure if this is related to the ...

On STM32 there are constraints on EXTI mapping on GPIOs, each bit in a port can only be mapped to a single GPIO. For example, you cannot use GPIOA[4] and GPIOB[4] together.

Please read the STM32 RM if you plan to use EXTI, it is a tricky limitation.

Giovanni

So can I use PAL events instead? As ...

/* init */
palEnableLineEvent(PAL_LINE(GPIOC, GPIOC_PUSH), PAL_EVENT_MODE_BOTH_EDGES);
palSetLineCallback(PAL_LINE(GPIOC, GPIOC_PUSH), handle_button_ext, NULL);

palEnableLineEvent(PAL_LINE(GPIOA, GPIOA_CTP_IRQ), PAL_EVENT_MODE_FALLING_EDGE);
palSetLineCallback(PAL_LINE(GPIOA, GPIOA_CTP_IRQ ...

oh,i see,i found palEnableLineEvent & palSetLineCallback.

palSetLineCallbackSet the parameters of the callback,
What can this parameter contain? I guess this parameter can be used to distinguish between PC1 and PE1?

OS : ChibiOS-21.11.3
MCU : STM32F405VGT6

I noticed that this article(https://forum.chibios.org/viewtopic.php?f=36&t=3355) has a discussion about EXTI, see you mentioned the palLineEnableEvent function, but I didn't find this function in the ChibiOS-21.11.3 version,
I found the extiEnableGroup1 ...

Hi,

An I2S driver is already included, is it lacking somehow?

Not sure about your problem but you should not specify STM32_DMA_CR_EN to the dmaStreamSetMode(), dmaStreamEnable() does that.

Giovanni

At present, I still use ChibiOS-21.11.3, and I am currently doing math on I2S, but I have the ...

Giovanni wrote:Hi,

It never had such a function, you are probably using some customized driver.

Giovanni

Maybe yes, I'm talking about the old version, downloaded from an unofficial link on github, I know that sdStart is initialized, I want to change the baud rate now, should I reinitialize with sdStart as well