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Example to drive two 7-Segment LEDs
/*****************************************
* COPYRIGHT (c) BLITZLOGIC Sdn Bhd *
* - by A. Wong 1/2/2000 *
* *
* example of using FOR loop to drive *
* two 7-Segment LEDs *
* *
* Compiler : IDE51 C Compiler - SPJ *
* *
****************************************/
#include < sfr31.h > // Include 8031/8051 SFR definition header file
unsigned char num[10] = { 0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f };
void main( ){
unsigned char cnt, right;
P1 = 0; // initialize all P1 outputs to be zero
P3 = 0;
while(1) {
for( right=1; right<3; right++ )
{
P3 = right;
for( cnt=0; cnt<10; cnt++ )
{
P1 = num[cnt];
delay_ms(500); // half second delay
// Assuming 12Mhz Crystalsp;
}
}
}
}
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