54 lines
803 B
C
54 lines
803 B
C
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/*
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* piface.c:
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* Simple test for the PiFace
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*
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* Read the buttons and output the same to the LEDs
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*/
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#include <wiringPi.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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int outputs [4] = { 0,0,0,0 } ;
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void scanButton (int button)
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{
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if (digitalRead (button) == LOW)
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{
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outputs [button] ^= 1 ;
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digitalWrite (button, outputs [button]) ;
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}
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while (digitalRead (button) == LOW)
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delay (1) ;
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}
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int main (void)
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{
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int pin, button ;
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printf ("Raspberry Pi wiringPiFace test program\n") ;
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if (wiringPiSetupPiFace () == -1)
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exit (1) ;
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// Enable internal pull-ups
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for (pin = 0 ; pin < 8 ; ++pin)
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pullUpDnControl (pin, PUD_UP) ;
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for (;;)
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{
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for (button = 0 ; button < 4 ; ++button)
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scanButton (button) ;
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delay (1) ;
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}
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return 0 ;
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}
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