The process of writing programs in Keil is to create a project-->save the project-->create files-->add files to the project-->write the program-->compile-->download the program.
#include
sbit LED = P0^0;
sbit ADDR0 = P1^0;
sbit ADDR1 = P1^1;
sbit ADDR2 = P1^2;
sbit ADDR3 = P1^3;
sbit ENLED = P1^4;
void main(){ //void is the function type
//The following is the declaration statement
unsigned int i = 0; //define an unsigned integer variable i and assign an initial value of 0
//The following is the execution statement part
ENLED = 0; //U3, U4 two 74HC138 always enabled
ADDR3 = 1; // Enable U3 to output normally
ADDR2 = 1; //Turn on transistor Q16 through the output of Y6 of U3
ADDR1 = 1;
ADDR0 = 0;
while (1){
LED = 0; // Turn on the small light
for (i=0; i<30000; i++); //delay for a while
LED = 1; // Turn off the light
for (i=0; i<30000; i++); //delay for a while
}
}
Compile this program and download it to the microcontroller, and you will find that the small light LED2 will flash.
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Professor at Beihang University, dedicated to promoting microcontrollers and embedded systems for over 20 years.
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