Timeslot and FreeRTOS problem

[loquat]

I am developing Timeslot program with FreeRTOS. (on nRF51822)

timeslot's signal handler is timeslot_signal_callback() ... xQueueSendFromISR(s_timeslot_queue, &cmd, NULL); ..

A few minute age, HardFault was occured.

When xQueueSendFromISR is erase, not occured.

What am I doing wrong?

[Susheel Nuguru]

The timeslot callback is called with the highest priority 0, and you are not allowed to call FreeRTOS API from this priority.

you can only call the FreeRTOS API from priority equal or lower than configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY defined in FreeRTOSConfig.h file.

Equal or lower in priority level means equal or higher in number.

In short, you cannot call FreeRTOS API from timeslot.

[loquat]

Thanks. I understand.