arduino 驱动 8x8点阵模块（2片74HC595芯片驱动红色8X8点阵 5线连接）滚屏显示 - YFROBOT创客社区

连接好后我们看下程序：

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/**************************************************
* Face
* ( 8x8 Led Dot Matrix with two 74HC595 on Arduino)
*
* by YFROBOT
***************************************************/
#define AFrame 7                      // animation array
#define Space 4                      // Each frame space
#define FStep (8+Space)

//Pin connected to DS of 74HC595
int SER = 10;
//Pin connected to ST_CP of 74HC595
int RCK  = 11;
//Pin connected to SH_CP of 74HC595
int SRCK  = 12;

byte screen[8] = {0, 0, 0, 0, 0, 0, 0, 0};
byte scroll = 0;
byte frame = 0;

unsigned char animation[AFrame][8] = {
  {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
  //user defined animation data
  //  {0xFF, 0xA5, 0xC3, 0x81, 0xBD, 0xA5, 0xA5, 0xFF,},
  //  {0xC3, 0xC3, 0x0, 0x18, 0x18, 0x0, 0x42, 0x3C,},
  //  {0x8, 0xC, 0xFE, 0xFF, 0xFE, 0xC, 0x8, 0x0,},
  //  {0xC3, 0x81, 0xE7, 0xE7, 0xE7, 0x81, 0x81, 0xC3,},
  {0x42, 0x42, 0x42, 0x7E, 0x42, 0x42, 0x42, 0x42,},
  {0x7E, 0x40, 0x40, 0x7C, 0x40, 0x40, 0x40, 0x7E,},
  {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x7C,},
  {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x7C,},
  {0x18, 0x24, 0x42, 0x42, 0x42, 0x42, 0x24, 0x18,},

  {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}
};

void setup() {
  pinMode(RCK, OUTPUT);
  pinMode(SRCK, OUTPUT);
  pinMode(SER, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  // Parameters 1: animation data
  // Parameters 2: display mode
  // Parameters 3: refresh time
  ScreenDisplay( animation, 1 , 200);
}

void UpDateScreen(byte data[], unsigned long ReTime) {
  unsigned long startime = millis();
  while (millis() - startime < ReTime)
  {
for (int i = 0; i < 8; i++) {
   byte col = B1 << i;
   digitalWrite(RCK, LOW);
   shiftOut(SER, SRCK, LSBFIRST, ~col); //先选择列
   shiftOut(SER, SRCK, LSBFIRST, data); //再送行数据
   digitalWrite(RCK, HIGH);
}
  }
}

void ScreenDisplay( unsigned char AN[AFrame][8], int mode , unsigned long ReTime) {

  UpDateScreen(screen, ReTime);    // Refresh screen data

  if (mode == 0 ) {             // mode 1:refresh Display
for (int i = 0; i < 8; i++) {
   screen = AN[frame];
}
frame ++;
if (frame >=  AFrame) {
   frame = 0;
}
  } else if (mode == 1) {       // mode 2: scroll Display
if (scroll > FStep * frame && scroll <= FStep * (frame + 1)) {
   for (int i = 0; i < 8; i++) {
      screen = (AN[frame] << (scroll - FStep * frame)) | (AN[frame + 1] >> (FStep * (frame + 1) - scroll)) ;
   }
   if (scroll % FStep == 0) {
      frame ++;
      if (frame >=  AFrame - 1) {
      frame = 0;
      scroll = 1;
      }
   }
}
scroll++;
  }
}

程序中参数和函数简介：

animation[AFrame][8] 需要用户通过上面的取模软件获取，编辑你想要的画面后，复制下面的数据至animation数组中即可！

AFrame 值根据你数组来定

Space 是每组画面间的间隔，例如为4，则两个画面间隔4列！

ScreenDisplay( unsigned char AN[AFrame][8],int mod, unsigned long ReTime) 函数为显示函数；其中

参数一：数组数据

参数二：显示模式 1为滚屏模式，0为动画模式

参数三：显示速度

下面我们运行程序看下效果（程序显示HELLO滚屏效果~~）：

http://v.youku.com/v_show/id_XMTM2MzUxNTA1Mg==.html