Thank you for all your answers.
@Piranha Thanks, And sorry for my stupid mistakes. For now, I'm running i2c from one thread, I'll deal with multi-thread later, but your comment is absolutely right.
@Pavel A.
I'm very suprised that osMutexRelease can't work from ISR, even if I didn't read the manual, because I read the code, and it does (or get_IPSR(), that returns __ASM("ipsr") doesn't work well):
/**
* @brief Release a Mutex that was obtained by \ref osMutexWait
* @param mutex_id mutex ID obtained by \ref osMutexCreate.
* @retval status code that indicates the execution status of the function.
* @note MUST REMAIN UNCHANGED: \b osMutexRelease shall be consistent in every CMSIS-RTOS.
*/
osStatus osMutexRelease (osMutexId mutex_id)
{
osStatus result = osOK;
portBASE_TYPE taskWoken = pdFALSE;
if (inHandlerMode()) {
if (xSemaphoreGiveFromISR(mutex_id, &taskWoken) != pdTRUE) {
return osErrorOS;
}
portEND_SWITCHING_ISR(taskWoken);
}
else if (xSemaphoreGive(mutex_id) != pdTRUE)
{
result = osErrorOS;
}
return result;
}But my problem comes earlyier, I would love to enter to "HAL_I2C_MasterTxCpltCallback"/"HAL_I2C_MasterTxCpltCallback", and it does, only from step by step debug.
For each data sent through i2c, I2C1_EV_IRQHandler is called few times: once per byte (and maybe to release i2c bus)
From step by step debug, and logic analyser, we can see the different bytes sent.
When running directly, I just set the lines from transmission, and boom.
This is when I run with no breakpoint (it remains like that and there is really no signal even very fast)
From my code:
s8 BNO055_I2C_bus_write(u8 dev_addr, u8 reg_addr, u8 *reg_data, u8 cnt) {
s32 BNO055_iERROR = BNO055_INIT_VALUE;
uint8_t tab[cnt + 1];
tab[0] = reg_addr;
memcpy(&tab[1], reg_data, cnt);
HAL_I2C_Master_Transmit_IT(&hi2c1, dev_addr << 1, tab, cnt + 1);
osMutexWait (&I2C_MUTEX,osWaitForever); // I can breakpoint here
return (s8) BNO055_iERROR;
}If I comment HAL_I2C_Master_Transmit_IT, then I fall in the "mutexAcquiere".
I'm wondering if it comes from something else: heap/stack configuration, or so, task priority, etc...
you can find sources here: https://nextcloud.creable.fr/index.php/s/847AxfNaiSEtgJ5 , and reproduce on nucleo-f401re board, through atollic studio.
