VTech Alphabert s Magic Readport User Manual download pdf (Page 11)

BM Dept., Govt. Engg. College, Gandhinagar Page 11

Program 3: Write program to read switch connected at port pin P1.0, toggle it and send it to

port pin P1.1.

 # include <reg51.h>

sbit input = P1^0; /* Define input pin P1.0*/

sbit output=P1^1; /* Define output pin P1.1*/

void main(void)

{

while(1) //Continuous infinite loop

{

output=~input; //Read input pin, toggle it and send to output

}

:: WORKSHEET ::

Exercise:

A. Write C language program to continuously toggle pin P1.0 without disturbing other port

pins.

B. Write C language program to perform OR operation between port pin P1.0 and P1.1.

Display result on port pin P1.2.

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 79 80

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VTech Alphabert s Magic Readport User Manual Page 11