VTech Alphabert s Magic Readport User Manual download pdf (Page 27)

BM Dept., Govt. Engg. College, Gandhinagar Page 27

B. Execute following C program in Keil and measure frequency of the square wave.

# include <reg51.h>

sbit wave_pin P1^0;

void sqdelay(unsigned int);

void main(void)

{

while(1)

{

wave_pin=1;

sqdelay(100);

wave_pin=0;

sqdelay(100);

}

void sqdelay(unsigned int t)

{

unsigned int i,j;

for(i=0;i<t;i++)

for(j=0;j<1000;j++);

}

Draw waveform (show on time and off time)

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VTech Alphabert s Magic Readport User Manual Page 27