Arduino与Proteus仿真实例-MAX7219单个8x8LED点阵驱动仿真

MAX7219单个8x8LED点阵驱动仿真

LED 矩阵或 LED 显示器是一种大型、低分辨率形式的点阵显示器，可用于工业和商业信息显示以及业余爱好者的人机界面。它由一个二维二极管矩阵组成，其阴极按行连接，阳极按列连接（反之亦然）。

MAX7219/MAX7221是紧凑型串行输入/输出共阴极显示驱动器，可将微处理器(μPs)连接到多达8位的7段数字LED显示器、条形图显示器或64个独立LED。

Max7219与LED点阵的接线如下：

在前面的文章中已经对7段数码管和MAX7219做了详细的介绍，请参考：

2、仿真电路原理图

4、仿真代码实现

本次仿真代码使用到如下开源库：

LEDControl

//We always have to include the library
#include "LedControl.h"
/\*
 Now we need a LedControl to work with.
 \*\*\*\*\* These pin numbers will probably not work with your hardware \*\*\*\*\*
 pin 12 is connected to the DataIn 
 pin 11 is connected to the CLK 
 pin 10 is connected to LOAD 
 We have only a single MAX72XX.
 \*/
LedControl lc=LedControl(12,10,11,1);

/\* we always wait a bit between updates of the display \*/
unsigned long delaytime=300;

void setup() {
  /\*
 The MAX72XX is in power-saving mode on startup,
 we have to do a wakeup call
 \*/
  lc.shutdown(0,false);
  /\* Set the brightness to a medium values \*/
  lc.setIntensity(0,10);
  /\* and clear the display \*/
  lc.clearDisplay(0);
}

void displayImage(const byte\* image) {
  for (int i = 0; i < 8; i++) {
    for (int j = 0; j < 8; j++) {
      lc.setLed(0, i, j, bitRead(image[i], 7 - j));
    }
  }
}
void display\_digis(){
  int i = 0;
  do{
    displayImage(DIGIS[i]);
    i++;
    delay(delaytime);
  }while(i < DIGIS_LEN);
}

void loop() { 
  display\_digis();
}

数字的点阵数据如下：

const byte DIGIS[][8] = {
{ // 1
  B00010000,
  B00110000,
  B00010000,
  B00010000,
  B00010000,
  B00010000,
  B00010000,
  B00111000
},{ // 2
  B00111000,
  B01000100,
  B00000100,
  B00000100,
  B00001000,
  B00010000,
  B00100000,
  B01111100
},{ // 3
  B00111000,
  B01000100,
  B00000100,
  B00011000,
  B00000100,
  B00000100,
  B01000100,
  B00111000
},{ // 4
  B00000100,
  B00001100,
  B00010100,
  B00100100,
  B01000100,
  B01111110,
  B00000100,
  B00000100
},{ // 5
  B01111100,
  B01000000,
  B01000000,
  B01111000,
  B00000100,
  B00000100,
  B01000100,
  B00111000
},{ // 6
  B00111000,
  B01000100,
  B01000000,
  B01111000,
  B01000100,
  B01000100,
  B01000100,
  B00111000
},{ // 7
  B01111100,
  B00000100,
  B00000100,
  B00001000,
  B00010000,
  B00100000,
  B00100000,
  B00100000
},{ // 8
  B00111000,
  B01000100,
  B01000100,
  B00111000,
  B01000100,
  B01000100,
  B01000100,
  B00111000
},{ // 9
  B00111000,
  B01000100,
  B01000100,
  B01000100,
  B00111100,
  B00000100,
  B01000100,
  B00111000
},{ // 0
  B00111000,
  B01000100,
  B01000100,
  B01000100,
  B01000100,
  B01000100,
  B01000100,
  B00111000
}};
const int DIGIS_LEN = sizeof(DIGIS)/8;