LED lighting experiment with simulation software proteus

    Before this experiment , Make sure that the system is properly installed proteus and keil Tools .proteus It is used to design circuit diagrams ,keil It's for writing c The language code is compiled into the chip usable hex programmatic .

    front install keil When , In the end, I mentioned , If installed keil,proteus, During the simulation , You can use it directly proteus. Without opening keil, And then use what kind of joint debugging , need proteus Turn on remote debugging ,keil Open the debug , You need to download an extra one VDM51.dll Dynamic library files , Then configure , Too many locks , And it's a waste of keil resources .

    The light here led All the experiments used proteus Software complete .

    stay proteus Medium new project ： Enter the project name , Choose a save path .

    

    Select template , Select the second radio box , Create from template , This template directly uses the default DEFAULT, This is for drawing design drawings . 

    This step is to choose PCB Layout , It is also created from the template , Still select the default DEFAULT type . 

    In this step, choose “ Create a hardware project ”, The English version is ：Create Firmware Project.Family choice 8051,Controller choice 80C51, Compiler selection Keil for 8051, If it shows not configured, You have to configure it yourself .

    This step , without Keil for 8051 compiler , You can click on Compilers Button , Configure the system installation Keil compiler ：

    With this option , The project we created , To source code , And it's c Linguistic .

    You can then switch views to Schematic Capture, Novices should never switch to PCB Layout View , Otherwise, it will run away . There is a direct 80C51 Chip , We don't have to go to the equipment library to choose .

      This experiment is to light up led, We still need to choose other components , Light-emitting diode LED-RED, 220R resistance . stay Schematic Capture Under View , We are working on components Component In mode , Choose the device , Click on "P"：    

    The pop-up box shown below appears ： In the keyword input box , Input separately LED-RED,220R Select the diode on the right and 220 Ohmic resistance . Finally, click at the bottom of the page “ok” End selecting components .

    Then there is drawing , First select the diode or resistor in the device box , Then left click in the drawing area to drag out the components .

      We still need to Terminal Mode Choose “ Grounding ”(GROUND)：

    Then there is the circuit connection , It's very simple , Directly connect the place you want to connect with the mouse . 

    The circuit diagram drawn is as follows ：

    This circuit , The positive pole of the diode is connected to the single chip microcomputer , The negative pole is connected to a resistor , Final grounding , According to the principle of luminescence , Need MCU pin P2.0 Give the high level .

      The source code is very simple , It will almost disappoint you ：

#include <reg51.h>
#include <stdio.h>
sbit led = P2^0;
void main(void)
 { 
   while (1){
    led = 1;
   }
 }

Simulation effect picture ：

    This experiment , You can continue to do it , Here's just a simple light-emitting diode , In fact, a delay can be used to make the diode flash . The principle is ： Turn on high level , Time delay 1 second , Turn on low level , Time delay 1 second , Go back and forth , You can see the diode flashing .

    Code ：

#include <reg51.h>
#include <stdio.h>
sbit led = P2^0;
void delay()
{
  unsigned int i,j;
  for(i=0;i<1000;i++)
  {
    for(j=0;j<110;j++);
  }
}
void main(void)
 { 
   while (1){
    led = 1;
    delay();
    led = 0;
    delay();
   }
 }

    Simulation effect ：

    It can also be observed that , Directly lit with the front led The difference is ,P2.0 The pin will be red , High level , It's blue for a while , Indicates low level , That's it led Flashing effect . 

    There is another way to draw the circuit diagram , One end of the resistor is connected to the power supply , such , The direction of the diode needs to be rotated 180 degree , The negative pole of the diode needs to be connected to the development board , The lighting program naturally needs to be modified , If it is flashing , In fact, there is no need to modify .

      In all development software , Personally, I think this kind of simulation software is the most fun , Build the circuit , Programming , Finally, simulation , You can see the effect directly , Really excited .

    It is worth noting that , I began to choose the pin connection , Direct to P0 Pin , Later, it was found that the diode did not light at the dead or alive point , The simulation does not report an error , Later, I found that I received P2 Pin , It lit up immediately , And when observing experimental phenomena , Find out P0 The pins have not changed at all , Other P1,P2,P3 Will be displayed in red ,P2 Connect the diode pin P2.0 From time to time, it also shows blue , You can see it here ,P0 The pin does not participate in the level output . So pay attention to the wiring .