ChibiOS Free Embedded RTOS

I got where mistake is: sdWrite() followed by chEvtWaitAny() and possibility for thread to be woken up not by my event only (and pass chEvtWaitAny for no good reason, i.e. with CHN_TRANSMISSION_END not set). Sometimes it wakes up by unknown reason with flags = 0. It passes chEvtWaitAny(), and can st...

OK, I have a code in a function that sends a packet: chEvtWaitAny(EVENT_MASK(0)); eventflags_t pending = chEvtGetAndClearFlags(&cmdListener); if (pending & CHN_TRANSMISSION_END) palClearPort(GPIOF, CONSOLE_DE); In fact, after a time of working correctly (wakeup on CHN_TRANSMISSION_END only),...

Sorry, but I still cannot understand.

We have a line at start of the thread:

Will it raise event on CHN_TRANSMISSION_END only, or it will raise events on all flags except CHN_TRANSMISSION_END?

Giovanni wrote:After writing, you get first CHN_OUTPUT_EMPTY when the software queue is empty then CHN_TRANSMISSION_END when the UART is done sending the last frame.

Wow, I will get CHN_OUTPUT_EMPTY even if I using CHN_TRANSMISSION_END as 4th argument of chEvtRegisterMaskWithFlags()?

Only one point of write to SD4 exists, and it is shown in my sources. As I understand, it should pass chEvtWaitAny() line ONLY if CHN_TRANSMISSION_END was raised, so, next write can be done only after previous was already fully completed. If I do chEvtRegisterMaskWithFlags(&SD4.event, &cmdLi...

I have tried simplified version of this, I need just to turn off DE line after sending was finished. I do at start of thread: chEvtRegisterMaskWithFlags(&SD4.event, &cmdListener, EVENT_MASK(0), CHN_TRANSMISSION_END); then sending: // set DE and send packet palSetPort(GPIOF, CONSOLE_DE); sdWr...

Just found: STM32 RTC module can set daylight saving time in rtc_lld_set_time (RTCv2/hal_rtc_lld.c), but not resetting this flag if it was set before.

I have tried this with no luck.
Everything started to work after moving sensor initialization to thread instead of 'before main loop' section.

Hi! I working with device that makes interrupt when measurement is ready by rising its INT pin (connected to stm32f411's EXTI pin). When device has finished measurement and set its INT pin, I need to get new data via SPI in ~300us, accurately, ~2000 times per second, without missing any data. I set ...

Thanks you for answer!

So, main stack is a CSTACK, as I understand, process stack is a CSTACK too in this case, and thread stack is a stack located in thread variable, right?
What is HEAP and who uses it?