Arduino驱动RGB点阵彩屏（Led matrix）--显示数字，字母，汉字，学习经历，供你们参考，少走弯路

Arduino UNO驱动RGB点阵彩屏，在32*64的全彩单板上测试过，彩屏单板为HUB75接口。

买了几块点阵市面上的LED点阵单板（非8*八、7219点阵屏、ws28十二、oled12864），还有两块主控板，飞度和新翼的卡，不能用，因此试试Arduino。

材料：

1 Arduino UNO R3

2某宝买的全彩条屏（32*64）：

RGB条屏背面接口是HUB75。

市面上有HUB75接口和HUB75E接口区别：

 

 

硬件连线：（全彩RGB单板须要单独供电5V，1A以上，不然颜色显示不正确）

Arduino按HUB75接口链接以下图：（Arduino Mega：Mega2560）

 

Arduino程序中的引脚定义（Arduino UNO的第8脚）以下图：

 

程序一：全红、全绿、全蓝、全黑

将程序下载能看到32*32彩屏全红，全绿，全蓝，全黑。

 

#include "Adafruit_GFX.h" // Core graphics library #include "RGBmatrixPanel.h" // Hardware-specific library //on the same PORT as the RGB data pins (D2-D7) #define CLK 8 // MUST be on PORTB! #define LAT 10 #define OE 9 #define A A0 #define B A1 #define C A2 #define D A3 // Last parameter = 'false' disable double-buffering RGBmatrixPanel matrix(A, B, C, D, CLK, LAT, OE, false); void setup() { matrix.begin(); } void loop() { // fill the screen with red //注释matrix.fillRect(0, 0, 列, 行, matrix.Color333(red, Green, blue)); matrix.fillRect(0, 0, 32, 32, matrix.Color333(7, 0, 0)); delay(1000);   // fill the screen with green matrix.fillRect(0, 0, 32, 32, matrix.Color333(0, 7, 0)); delay(1000);   // fill the screen with blue matrix.fillRect(0, 0, 32, 32, matrix.Color333(0, 0, 7)); delay(1000);   // fill the screen with black matrix.fillScreen(matrix.Color333(0, 0, 0)); delay(1000); }

注意：程序用到了两个库文件（ RGB Matrix Panel library 和 Adafruit GFX Library）

库文件地址：

https://github.com/adafruit/Adafruit-GFX-Library

https://github.com/adafruit/RGB-matrix-Panel

 

程序二：显示数字和任意xy坐标的任意颜色点

程序以下：

#include "Adafruit_GFX.h" // Core graphics library #include "RGBmatrixPanel.h" // Hardware-specific library //on the same PORT as the RGB data pins (D2-D7) #define CLK 8 // MUST be on PORTB! #define LAT 10 #define OE 9 #define A A0 #define B A1 #define C A2 #define D A3 // Last parameter = 'false' disable double-buffering RGBmatrixPanel matrix(A, B, C, D, CLK, LAT, OE, false); void setup() { matrix.begin(); } void loop() { // draw some text! matrix.setCursor(1, 0); // start at top left, with one pixel of spacing matrix.setTextSize(1); // size 1 == 8 pixels high // print each letter with a rainbow color matrix.setTextColor(matrix.Color333(0,0,1)); matrix.print('1');delay(1000); matrix.setTextColor(matrix.Color333(1,0,0)); matrix.print('2');delay(1000); matrix.setTextColor(matrix.Color333(0,1,0)); matrix.print('3');delay(1000); matrix.setTextColor(matrix.Color333(1,1,0)); matrix.print('4');delay(1000); matrix.setTextColor(matrix.Color333(1,0,1)); matrix.print('5');delay(1000);   //第二行显示,显示不下了还会自动换行 matrix.setCursor(1, 9); matrix.setTextColor(matrix.Color333(0,1,1)); matrix.print('6');delay(1000); matrix.setTextColor(matrix.Color333(1,1,1)); matrix.print('7');delay(1000); matrix.setTextColor(matrix.Color333(0,0,1)); matrix.print('8');delay(1000); matrix.setTextColor(matrix.Color333(0,1,0)); matrix.print('9');delay(1000); matrix.setTextColor(matrix.Color333(1,0,0)); matrix.print('A');delay(1000); matrix.setTextColor(matrix.Color333(1,1,0)); matrix.print('B');delay(1000);   //任意位置显示任意颜色,31,31的位置显示白色 //Color333(R,G,B)  R/G/B:1-7之间 //draw a pixel in solid white matrix.drawPixel(31, 31, matrix.Color333(7, 7, 7)); delay(1000); while(1);   }

 

显示效果：

 

程序三：显示汉字

方法一: 描点法,利用函数matrix.drawPixel(x, y, matrix.Color333( 0, 7, 0));delay(300);进行描点写汉字;

 

如下程序显示“泪”，整个过程全是泪。。。。还显示了“A”。。。

#include "Adafruit_GFX.h" // Core graphics library
#include "RGBmatrixPanel.h" // Hardware-specific library
//on the same PORT as the RGB data pins (D2-D7)
#define CLK 8 // MUST be on PORTB!
#define LAT 10
#define OE 9
#define A A0
#define B A1
#define C A2
#define D A3

// Last parameter = 'false' disable double-buffering
RGBmatrixPanel matrix(A, B, C, D, CLK, LAT, OE, false);
void setup() {
matrix.begin();
}
void loop() {
// draw some text!
matrix.setCursor(16, 15); // start at top left, with one pixel of spacing
matrix.setTextSize(1); // size 1 == 8 pixels high
// print each letter with a rainbow color
matrix.setTextColor(matrix.Color333(0,0,1));
matrix.print('A');delay(1000);

//任意位置显示任意颜色,31,31的位置显示白色
//Color333(R,G,B)  R/G/B:1-7之间
//draw a pixel in solid white
matrix.drawPixel(31, 31, matrix.Color333(7, 7, 7));
delay(1000);

//汉字'泪'描点法找出坐标值,进行显示
matrix.drawPixel(2, 2, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(3, 3, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(2, 6, matrix.Color333( 0, 7, 0));delay(300);
matrix.drawPixel(3, 7, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(4, 11, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(3, 12, matrix.Color333( 0, 7, 0));delay(300);

matrix.drawPixel(3, 7, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(4, 11, matrix.Color333( 0, 7, 0));delay(300);
matrix.drawPixel(3, 12, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(2, 13, matrix.Color333( 0, 7, 0));delay(300);

matrix.drawPixel(7, 2, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(8, 2, matrix.Color333( 0, 7, 0));delay(300);
matrix.drawPixel(9, 2, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(10, 2, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(11, 2, matrix.Color333( 0, 7, 0));delay(300);

matrix.drawPixel(7, 3, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(11, 3, matrix.Color333( 0, 7, 0));delay(300);
matrix.drawPixel(7, 4, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(11, 4, matrix.Color333( 0, 7, 0));delay(300);

matrix.drawPixel(7, 5, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(8, 5, matrix.Color333( 0, 7, 0));delay(300);
matrix.drawPixel(9, 5, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(10, 5, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(11, 5, matrix.Color333( 0, 7, 0));delay(300);

matrix.drawPixel(7, 6, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(11, 6, matrix.Color333( 0, 7, 0));delay(300);

matrix.drawPixel(7, 7, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(8, 7, matrix.Color333( 0, 7, 0));delay(300);
matrix.drawPixel(9, 7, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(10, 7, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(11, 7, matrix.Color333( 0, 7, 0));delay(300);

matrix.drawPixel(7, 8, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(11, 8, matrix.Color333( 0, 7, 0));delay(300);
matrix.drawPixel(7, 9, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(11, 9, matrix.Color333( 0, 7, 0));delay(300);

matrix.drawPixel(7, 10, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(11, 10, matrix.Color333( 0, 7, 0));delay(300);
matrix.drawPixel(7, 11, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(11, 11, matrix.Color333( 0, 7, 0));delay(300);

matrix.drawPixel(7, 12, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(8, 12, matrix.Color333( 0, 7, 0));delay(300);
matrix.drawPixel(9, 12, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(10, 12, matrix.Color333( 0, 7, 0));delay(300);matrix.drawPixel(11,12, matrix.Color333( 0, 7, 0));delay(300);

}

显示效果：

 

方法二:思考能不能利用“Adafruit_GFX.h”来显示。。。 。。。或者其余办法。

暂时不会。。。

 

 

附录和参考网址：

程序和文件地址：https://download.csdn.net/download/veteran412/10938909

参考网址：

1 写得比较详细，用来测试屏幕好坏，红绿蓝颜色全屏测试单板好坏

https://www.baidu.com/link?url=J_1xQR2K9m3tTTcmViOS_IlhQQBRpv1K-yO5Pk2g74U9BdvpzjfBCk2P3XPoKz0jnTOrkNeT_t9_BhQG-FE_5Rr-A4KX4-z6Ll76kbrtcbe&wd=&eqid=c55b9fc500023931000000065c4ad6d4

2两个库文件地址（ RGB Matrix Panel library 和 Adafruit GFX Library）:

https://learn.adafruit.com/32x16-32x32-rgb-led-matrix/test-example-code

https://github.com/adafruit/Adafruit-GFX-Library

https://github.com/adafruit/RGB-matrix-Panel