pic16f88 sleep and wake on interrupt

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Don't know the details of MicroC, I use Microchip tools, but it should be pretty simple.

You need to enable the specific interrupt and enable all interrupts by turning on GIO. Then you sleep. The interrupt will awaken the processor. You need an interrupt handler, but it does not have to do anything, just return. MicroC probably provides a default one that does this.

Use a counter to represent the 3 seconds. For instance if you blink 3 times per second, you would want to set the counter to 9. Each time through the loop, check RB0. If it is high, set the counter back to 9. If it is low, decrement the counter. If the counter reaches zero, clear the interrupt flag for the RB0 interrupt, then go back to the sleep.

Bob