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Example to drive 5 X 7 Matrix LEDs
/***********************************************
* *
* COPYRIGHT (c) Blitzlogic Sdn. Bhd. *
* Author : Abraham Wong 2/2/2000 *
* *
* example of driving 5 x 7 Matrix LEDs *
* *
* Compiler : IMAGECRAFT AVR C - EVAL VERSION *
* *
***********************************************/
#include < io2313.h >
#include < macros.h >
char const pat[5]={ 0x3f, 0x02, 0x04, 0x02, 0x3f };
/* PB0 0 0 1 0 0
PB1 0 1 0 1 0
PB2 1 0 0 0 1
PB3 1 1 1 1 1
PB4 1 0 0 0 1
PB5 1 0 0 0 1
PB6 1 0 0 0 1
PATTERN FOR ALPHABET A */
void wait( ){
; }
void main( void ){
unsigned char cnt, col;
unsigned int i;
PORTB = 0; /* ZERO port_a & port P3 */
PORTD = 0;
for( ;; ){
col = 1;
for (cnt=0;cnt<5;cnt++){
for(col = 0;col < 32;col<<=1;){
PORTB = pat[cnt];
PORTD = col;
for (i = 0; i < 10000; i++){ wait(); /* delay for half second */
}
}
}
}
}
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