在pcDuino上面使用LED Matrix Kit

Cherish.

LED matrix kit是一个 8×8的 LED 矩阵。  它的驱动芯片是MAX7219。 MAX7219通过SPI接口和主机通讯。 pcDuino已经实现了SPI接口API。 在这里，我们看看怎么来吧LED matrix kit集成到pcDuino.
一：实验原件
pcduino V3 1个

usb hub 1个（1个插口连接键盘，1个插口连接鼠标）

LED matrix kit 一个

HDMI线 1根

杜邦线  1根

二：接线图

LED matrix kit 接口处VCC、GND、CLK、CS、DIN分别对应pcduino上的5V、GND、8、9、10.

三：代码

#include "core.h"
unsigned char i;
unsigned char j;
/*端口定义*/
int Max7219_pinCLK = 8;
int Max7219_pinCS = 9;
int Max7219_pinDIN = 10;

unsigned char disp1[38][8] =
{
{0x3C,0x42,0x42,0x42,0x42,0x42,0x42,0x3C},//0
{0x10,0x30,0x50,0x10,0x10,0x10,0x10,0x10},//1
{0x7E,0x2,0x2,0x7E,0x40,0x40,0x40,0x7E},//2
{0x3E,0x2,0x2,0x3E,0x2,0x2,0x3E,0x0},//3
{0x8,0x18,0x28,0x48,0xFE,0x8,0x8,0x8},//4
{0x3C,0x20,0x20,0x3C,0x4,0x4,0x3C,0x0},//5
{0x3C,0x20,0x20,0x3C,0x24,0x24,0x3C,0x0},//6
{0x3E,0x22,0x4,0x8,0x8,0x8,0x8,0x8},//7
{0x0,0x3E,0x22,0x22,0x3E,0x22,0x22,0x3E},//8
{0x3E,0x22,0x22,0x3E,0x2,0x2,0x2,0x3E},//9
{0x8,0x14,0x22,0x3E,0x22,0x22,0x22,0x22},//A
{0x3C,0x22,0x22,0x3E,0x22,0x22,0x3C,0x0},//B
{0x3C,0x40,0x40,0x40,0x40,0x40,0x3C,0x0},//C
{0x7C,0x42,0x42,0x42,0x42,0x42,0x7C,0x0},//D
{0x7C,0x40,0x40,0x7C,0x40,0x40,0x40,0x7C},//E
{0x7C,0x40,0x40,0x7C,0x40,0x40,0x40,0x40},//F
{0x3C,0x40,0x40,0x40,0x40,0x44,0x44,0x3C},//G
{0x44,0x44,0x44,0x7C,0x44,0x44,0x44,0x44},//H
{0x7C,0x10,0x10,0x10,0x10,0x10,0x10,0x7C},//I
{0x3C,0x8,0x8,0x8,0x8,0x8,0x48,0x30},//J
{0x0,0x24,0x28,0x30,0x20,0x30,0x28,0x24},//K
{0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x7C},//L
{0x81,0xC3,0xA5,0x99,0x81,0x81,0x81,0x81},//M
{0x0,0x42,0x62,0x52,0x4A,0x46,0x42,0x0},//N
{0x3C,0x42,0x42,0x42,0x42,0x42,0x42,0x3C},//O
{0x3C,0x22,0x22,0x22,0x3C,0x20,0x20,0x20},//P
{0x1C,0x22,0x22,0x22,0x22,0x26,0x22,0x1D},//Q
{0x3C,0x22,0x22,0x22,0x3C,0x24,0x22,0x21},//R
{0x0,0x1E,0x20,0x20,0x3E,0x2,0x2,0x3C},//S
{0x0,0x3E,0x8,0x8,0x8,0x8,0x8,0x8},//T
{0x42,0x42,0x42,0x42,0x42,0x42,0x22,0x1C},//U
{0x42,0x42,0x42,0x42,0x42,0x42,0x24,0x18},//V
{0x0,0x49,0x49,0x49,0x49,0x2A,0x1C,0x0},//W
{0x0,0x41,0x22,0x14,0x8,0x14,0x22,0x41},//X
{0x41,0x22,0x14,0x8,0x8,0x8,0x8,0x8},//Y
{0x0,0x7F,0x2,0x4,0x8,0x10,0x20,0x7F},//Z
{0x8,0x7F,0x49,0x49,0x7F,0x8,0x8,0x8},//中
{0xFE,0xBA,0x92,0xBA,0x92,0x9A,0xBA,0xFE},//国
};

void Write_Max7219_byte(unsigned char DATA)
{
unsigned char i;
digitalWrite(Max7219_pinCS,LOW);
for(i=8;i>=1;i--)
{
digitalWrite(Max7219_pinCLK,LOW);
if((DATA&0x80)==0x80)  digitalWrite(Max7219_pinDIN,HIGH);//提取Data的高一位数据
else                                             digitalWrite(Max7219_pinDIN,LOW);
DATA = DATA<<1;
digitalWrite(Max7219_pinCLK,HIGH);
}
}

void Write_Max7219(unsigned char address,unsigned char dat)
{
digitalWrite(Max7219_pinCS,LOW);
Write_Max7219_byte(address);           //写入地址，即数码管编号
Write_Max7219_byte(dat);               //写入数据，即数码管显示数字
digitalWrite(Max7219_pinCS,HIGH);
}

void Init_MAX7219(void)
{
Write_Max7219(0x09, 0x00);       //译码方式：BCD码
Write_Max7219(0x0a, 0x03);       //亮度
Write_Max7219(0x0b, 0x07);       //扫描界限；8个数码管显示
Write_Max7219(0x0c, 0x01);       //掉电模式：0，普通模式：1
Write_Max7219(0x0f, 0x00);       //显示测试：1；测试结束，正常显示：0
}

void setup()
{
pinMode(11,OUTPUT);
pinMode(12,OUTPUT);
digitalWrite(11,LOW);
digitalWrite(12,HIGH);
pinMode(Max7219_pinCLK,OUTPUT);
pinMode(Max7219_pinCS,OUTPUT);
pinMode(Max7219_pinDIN,OUTPUT);
delay(50);
Init_MAX7219();
}

void loop()
{
for(j=0;j<38;j++)
{
for(i=1;i<9;i++)
Write_Max7219(i,disp1[j][i-1]);
delay(500);
}
}









烧好程序，大功告成，出现很多数字以及可爱字母哦。

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