89C51 single chip microcomputer key control digital tube static display 0~9-EEWORLD

Collect

1. Proteus simulation diagram

insert image description here

The left side is a common cathode tube, which lights up at a high level; the right side is a common anode digital tube, which lights up at a low level

2.keli code

#include

sbit key1=P3^0;

sbit key2=P3^1;

int CC_num[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};

int CC_I=0,CA_I=0;

void delay_ms(int ms)

{

int i,j;

for(i=0;i for(j=0;j<110;j++);

}

void key1_exam()

{

if(key1 == 0)

{

//Button delay debounce

delay_ms(20);

if(key1 == 0)

{

if(CC_I>=9)

{

CC_I=0;

}

else

{

CC_I++;

}

P1=CC_num[CC_I];

}

while(!key1);

}

void key2_exam()

{

if(key2 == 0)

{

//Button delay debounce

delay_ms(20);

if(key2 == 0)

{

if(CA_I>=9)

{

CA_I=0;

}

else

{

CA_I++;

}

P2=~CC_num[CA_I];

}

while(!key2);

}

int main()

{

P1=CC_num[CC_I];

P2=~CC_num[CA_I];

while(1)

{

key1_exam();

key2_exam();

}

Keywords：89C51 Reference address：89C51 single chip microcomputer key control digital tube static display 0~9

Previous article：89C51 single chip microcomputer key control digital tube dynamic display 0~9
Next article：89C51 MCU timer 0, 1 control LED 1, 0.5 seconds flashing

Popular Resources
Popular amplifiers

Recommended Content

Latest Microcontroller Articles

Download from the Internet--ARM Getting Started Notes
A brief introduction: From today on, the ARM notebook of the rookie is open, and it can be regarded as a place to store these notes. Why publish it? Maybe you are interested in it. In fact, the reason for these notes is ...
Learn ARM development(22)
Turning off and on interrupts Interrupts are an efficient dialogue mechanism, but sometimes you don't want to interrupt the program while it is running. For example, when you are printing something, the program suddenly interrupts and another ...
Learn ARM development(21)
First, declare the task pointer, because it will be used later. Task pointer volatile TASK_TCB* volatile g_pCurrentTask = NULL;volatile TASK_TCB* vol ...
Learn ARM development(20)
With the previous Tick interrupt, the basic task switching conditions are ready. However, this "easterly" is also difficult to understand. Only through continuous practice can we understand it. ...
Learn ARM development(19)
After many days of hard work, I finally got the interrupt working. But in order to allow RTOS to use timer interrupts, what kind of interrupts can be implemented in S3C44B0? There are two methods in S3C44B0. ...
Learn ARM development(14)
Learn ARM development(15)
Learn ARM development(16)
Learn ARM development(17)

He Limin Column Microcontroller and Embedded Systems Bible

Professor at Beihang University, dedicated to promoting microcontrollers and embedded systems for over 20 years.

MoreSelected Circuit Diagrams

Change More Related Popular Components

MorePopular Articles

MoreDaily News

Guess you like