Hi, we want to use some function, scenario 1: we have a dimmer,and then we have a 50 hz signal it can every 10ms send to interrupt pin,if we receive the signal we can send PWM signal, we must to real time handle the signal, how can i use RTOS function in interrupt? and then it can not affect RTOS kernrl operation. thanks best regard, Eric

I’m afraid your question is not clear to me. Are you asking how to ensure interrupt latency is not effected by the kernel? If so then it depends on the microcontroller you are using. If you are using a FreeRTOS port that supports interrupt nesting then set the interrupt’s priority above configMAXSYSCALLINTERRUPTPRIORITY as the kernel will only disable interrupt at or lower than that priority. https://www.freertos.org/a00110.html#kernelpriority