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Example to drive 8 LEDS
/************************************************
* *
* COPYRIGHT (c) Blitzlogic Sdn. Bhd. *
* Author : Abraham Wong 21/1/2000 *
* *
* example of using WHILE loop construct *
* to drive 8 LEDS connected to port B *
* *
************************************************/
#include <16c84.h>
#USE DELAY( CLOCK=4000000 ) /* Using a 4 Mhz clock */
#FUSES XT,NOWDT,NOPROTECT,NOPUT
/* Use XT mode, No Watch Dog, No Code Protect, No Power-up Timer */
#byte port_b=6 /* define the location of register port_b */
main(){
byte cnt; value;
set_tris_b(0); /* set port_b to be outputs */
port_b = 0; /* initialize All port_b outp/uts to be zero */
value = 0x01;
while( TRUE )
{ /* forever loop using WHILE construct */
cnt = 0;
while ( cnt<8 )
{
port_b = value;
DELAY_MS(1000);
value = value << 1; /* shift left will put 0x01, 0x02, 0x04, 0x08, 0x10 */
cnt++; /* 0x20, 0x40, 0x80 to port_b */
}
}
}
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