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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 *
* *
* Compiler : SPJ 8051 C DEMO *
* *
************************************************/
#include /* Include 8031 SFR definition header file */
unsigned char pat[5] = {0x3f,0x02,0x04,0x02,0x3f} ;
void main () {
unsigned char cnt, col ;
P1 = 0 ; /* Initialize all P1 outputs to be zero */
P3 = 0;
while(1) {
col = 1 ;
for (cnt = 0 ; cnt < 5 ; cnt ++ ) {
for (col = 1 ; col < 32 ; col <<= 1) {
P3 = col ;
P1 = pat[cnt] ;
delay_ms(1) ; // delay of 1 ms
}
}
}
}
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