ChibiOS Free Embedded RTOS

Hey, I will but I have too much to do until next weekend.

I've been mixing the different versions, fixing issues and adding quite some code to achieve both Chapter 9 and MSC compliance these past few days. Here is the interesting bit :
**
Device is considered compliant with the Bootability specification.
**
Summary Log Counts [ Fails (0); Aborts ...

What about MSC tests ?

I'll look into it.

I wonder about USB HS DMA too. I tried it with ST library and found two bugs before it started to enumerate. ST does not recommend it because of the alignment issues ,there is no example online and very few questions on ST community. It doesn't seem to be used much. It then ...

It's an hardware error in F1 : it won't be fixed, ever. You can only work-around it. Anyway, enable debug checks to avoid these easy traps.

Did you enable debug checks in chconf.h ? I checked the repository and the code should trigger an error as you are asking to receive 1 byte :

msg_t i2c_lld_master_receive_timeout(I2CDriver *i2cp, i2caddr_t addr,
uint8_t *rxbuf, size_t rxbytes,
systime_t timeout) {
[...]
#if ...

If I recall correctly, early STM32 had major I2C hardware problems and ST later released a library named CPAL to help deal with it.

Have you seen this : m ?
"To get the library to function and detect the MPU6050, I had to modify the I2CdevreadBytes function to add in specific support for the ...

The example above (with more logic of course) works great to always be in the lowest consumption configuration possible.

Hello, it might be easier with Idle thread hooks (chconf.h) :

#define CORTEX_ENABLE_WFI_IDLE TRUE

/**
* @brief Idle thread enter hook.
* @note This hook is invoked within a critical zone, no OS functions
* should be invoked from here.
* @note This macro can be used to activate a power ...

The speeds in the first post above are with 25MHz SDIO, the second with 50MHz SDIO. I'll send you the modified files by the end of the week, there's a bit left to be tested/verified.