51 Some common code blocks in microcontroller development

16 characters in the digital tube

uchar code table[]={

0x3f,0x06,0x5b,0x4f,

0x66,0x6d,0x7d,0x07,

0x7f,0x6f,0x77,0x7c,

0x39,0x5e,0x79,0x71};

Delay function (declare it before using it)

void delay(uint);

void delay(uint z)

{

uint x,y;

for(x=z;x>0;x--)

for(y=110;y>0;y--);

}

Light up the first diode

#include

//Light up the first LED

sbit D1=P1^0;//P1 is the P1 port, P1^0 represents D1, and D1 is a variable named by itself

main()

{

D1=0;//Convert high frequency to low frequency

}

Light up multiple diodes

#include //Include the header file, right-click on "reg51.h" and open it to see the definition inside it

void main()

{

P1=0XAA; //The eight bits of the P1 port are operated together, the high and low levels are assigned to 10101010, and the diode corresponding to the bit of 0 is lit.

while(1);

}

#include //Include the header file, right-click on "reg51.h" and open it to see the definition inside it

sbit led1=P1^0; //The first LED is connected to the P1^0 port.

sbit led3=P1^2;

sbit led5=P1^4;

sbit led7=P1^6;

void main()

{

led1=0;    //Refer to the circuit diagram, P1^0 is low level, which can make led1 light up.

led3=0;

led5=0;

led7=0;

while(1);//Set an infinite loop here to let the program stay here to prevent it from running away.

}

Running water lamp fool-like lighting

#include

#define uint unsigned int

sbit p0=P1^0;

sbit p1=P1^1;

sbit p2=P1^2;

sbit p3=P1^3;

sbit p4=P1^4;

sbit p5=P1^5;

sbit p6=P1^6;

sbit p7=P1^7;

#define uchar unsigned char

void delayms(uint);

void main()

{

while(1)

{

//0xaa is 1, 3, 5, 7, 0x55 2, 4, 6, 8

p0=1;

p1=0;

p2=1;

p3=0;

p4=1;

p5=0;

p6=1;

p7=0;

delayms(500);

p0=0;

p1=1;

p2=0;

p3=1;

p4=0;

p5=1;

p6=0;

p7=1;

delayms(500);

}

}

void delayms(uint xms)

{

uint x,y;

for(x=xms;x>0;x--)

for(y=110;y>0;y--);

}

P1^(0~7) The position of the light-emitting diode on stc

Timer function definition

void init()//Initialization function

{

TMOD=0x01;//Set timer 0 to working mode 1 (0000 0001)

TH0=(65536-45872)/256//install the initial value and interrupt once every 50ms

TL0=(65536-45872)%256;

EA=1;//Enable total interrupt

ET0=01; //Enable timer 0 interrupt

}

interrupt service routine

Interrupt routine

void function name() interrupt interrupt number using working group

{

Interrupt service routine content

}

e.g.:

void T1_time() interrupt 3

{

TH1=(65536-10000)/256;

TL1=(65536-10000)%256;

}