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Example to drive 5 x 7 Matrix LED
/************************************************
* *
* COPYRIGHT (c) Blitzlogic Sdn. Bhd. *
* Author : Abraham Wong 21/1/2000 *
* *
* example of driving 5 x 7 Matrix LEDs *
* *
************************************************/
#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 */
#byte port_a=5 /* define the location of register port_b */
char const pat[5]={0x3f,0x02,0x04,0x02,0x3f};
main(){
char cnt, col;
set_tris_b(0); /* set port_b as outputs */
set_tris_a(0); /* set port_a as output */
port_b = 0; /* ZERO port_a & port_b */
port_a = 0;
for( ;; )
{
col = 1;
for(cnt = 0;cnt < 5;cnt++)
{
port_b = pat[cnt];
port_a = col;
delay_ms(1);
col<<=1;
}
}
}
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