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Hi, I need to use the external interrupts of the LPC932. The micro will be in sleeping mode and will be woke up only by these two events. It works fine the first time, but then it does not work any more for external interrupt 0. Why? Could it be my Port configuration on port 1, which is where these two interrupts are entered. These two pins have to be input only. IT0 = 1; //pulses will be edge triggered EX0 = 1; IT1 = 1; //pulses will be edge triggered EX1 = 1; EA = 1; //EBO = 1; //Brown Out interrupt (IEN0.5) PCONA = 0xEF; // turn off all peripherals that can be turned off PCON |= 0x12; // switch to Power Down mode while(1); Thank you!
I think maybe since the contents of some registers are lost after entering PDM, the "pulse counter" is never counting because it is always losing its contents...don't you think? how would I know, you never showed it. I have been communicating under the impression that you showed "the whole truth and nothing but the truth". It is annoying to get information in the 25th post, or whatever the number is, that might have cleared the problem in post 3. Erik