F28335 can't interrupt after a few minutes

nwpu09 said:

Hi, everyone: When started, all interrupts such as SCI, SPI, ePWM etc can enter, however, after about 30 minutes (it's a radom time and may vary) continous running, no interrupt occur. Did anybody also across this problem? It has puzzled me for a long time. Thx~

Some places to look -

• If you halt the processor after interrupts have stopped, what state is it in? 
• Is the CPU still executing within your code or has it gone into the weeds? 
• Is it possible the stack has overflowed?
• Are interrupts flagged in the IFR register and enabled in the IER register? 
• Is the interrupt mask INTM set or cleared?
• Are the PIE interrupts setup correctly?

OK，thank you very much. I'm using a XPC to record all my data which are sent through the SPI. 1. When halted, the program may stop at a radom place in the for(;;){} circle; 2. The CPU is still executing because I can also receive data from SPI; 3. I am not sure on this question, but whether overflowed or not can affect the interupt? And how can I make sure on the overflow? 4,5,6. Yes, IER register is enabled and both INTM and PIE are setup correctly. After all, if these registers are on a wrong state no interrupt will occur at the begining. This problem is really tough :(