Steven Waters

Push button C program required

Discussion created by Steven Waters on Jul 22, 2006
Latest reply on Jul 22, 2006 by David Payne
It is required to connect 4 push buttons to a 89c668 microcontroller.

When a key is pressed an interrupt is generated to read the key pressed.

The program should include

1. a 'debounce function' for mechanical bounce of the switches.

2. An interrupt service routine for the function

'void EX0_readKeyP(void)interrupt 0 {...}'

3. A 'main function' to set up the interrupt and place the key read into port 2 of the microcontroller.

Please help.

Many Thanks.