(C51 Learning 1) How to light up the LED lamp-EEWORLD

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1. Find the minimum system schematic diagram of C51

The development board you bought online must have a CD with a schematic diagram. First find the minimum system schematic diagram. This schematic diagram shows what the CPU I/O interface is connected to. And the I/O ports are numbered.

2. Find the LED module schematic

As can be seen from the figure below, each of the 8 interfaces of the P1 group I/O port is connected to an LED light, and when a port on P1 is at a low level, the LED will light up.

3. Programming

#include

sbit LED0=P1^0; // Use your own logo LED0 to represent I/O port P1^0

sbit LED1=P1^1;

void main()

{

LED0 = 0; //P1^0 port gives low level

LED1 = 0; //P1^1 port gives low level

while(1); //Do not let the program end to prevent it from running away or freezing.

}

4 Flowing Water Lights

#include

sbit LED0=P1^0;

sbit LED1=P1^1;

sbit LED2=P1^2;

sbit LED3=P1^3;

sbit LED4=P1^4;

sbit LED5=P1^5;

sbit LED6=P1^6;

sbit LED7=P1^7;

void delay(unsigned int i) //ÑÓ³Ùº¯Êý

{

while(--i);

}

void main()

{

while(1)

{

LED0=0;

delay(2000);

LED0=1;

delay(2000);

LED1=0;

delay(2000);

LED1=1;

delay(1000);

LED2=0;

delay(2000);

LED2=1;

delay(2000);

LED3=0;

delay(2000);

LED3=1;

delay(2000);

LED4=0;

delay(2000);

LED4=1;

delay(2000);

LED5=0;

delay(2000);

LED5=1;

delay(2000);

LED6=0;

delay(2000);

LED6=1;

delay(2000);

LED7=0;

delay(2000);

LED7=1;

delay(2000);

}

Keywords：C51 Reference address：(C51 Learning 1) How to light up the LED lamp

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