Hello,
I am using STM32F407ZGT6 Cortex-M4 microcontroller. I am interested in changing the priority of a certain interrupt while servicing the same interrupt. Is that possible?
More elaborately, lets say I have an interrupt which has a priority of 4. The interrupt has arrived and I am currently in the ISR servicing that interrupt. After running a certain code (in the ISR), I want to run the remaining code (in the ISR) to run at higher priority (say 2). And when I was about to leave the ISR, I again change its priority to 4. Is this possible?
Currently, I have achieved this by calling a higher priority interrupt inside the lower priority interrupt.
Thanking in anticipation for your time and help.
Thanks for the reply!
I am still unable to understand why I need to use BASEPRI. Because SVC has a priority higher than IRQHanlder_4, so the SVC interrupt will easily pre-empt the IRQHandler_4 and I don't need to change BASEPRI. Please correct me if I am wrong.
Any ways, the idea of using SVC is as similar as I am already achieving by calling a higher priority (software) interrupt inside IRQHandler_4. Please correct me if I am wrong.
Many thanks for your time and help!