Question 1: When one interrupt handler is executed, will it be interrupted if another interrupt with the same priority occurs?
Question 2: When one interrupt handler is executed, will it be interrupted if another interrupt with the lower priority occurs?
I used MSP430. The interrupts are always nested as long as GIE is enabled. The priority is only determine whose interrupt handler is executed first if there are a few interrupts occurred at the same time and pended (before they are responded). But I don't find any answer for Cortex-M0 in its documents and google search.