8*8點陣模塊

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點陣模塊

/**************************************************
 * Face
 * ( 8x8 Led Dot Matrix with two 74HC595 on Arduino)
 *
 * by YFROBOT
 ***************************************************/

#include "TimerOne.h"
#include "face.h"

#define ROW_DATA ((row[0]<<7)|(row[1]<<6)|(row[2]<<5)|(row[3]<<4)|(row[4]<<3)|(row[5]<<2)|(row[6]<<1)|(row[7]<<0))
#define COL_DATA ((col[0]<<7)|(col[1]<<6)|(col[2]<<5)|(col[3]<<4)|(col[4]<<3)|(col[5]<<2)|(col[6]<<1)|(col[7]<<0))

//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;
int row[8] = {
  0, 0, 0, 0, 0, 0, 0, 0
};
int col[8] = {
  0, 0, 0, 0, 0, 0, 0, 0
};
byte screen[8] = {
  0, 0, 0, 0, 0, 0, 0, 0
};
volatile byte screenRow = 0;
volatile byte screenCol = 0;

// A counter to know what frame we're showing
int animationIndex = 0;
// 8x8 Point temporary array
byte brightnesses[64];

void setup() {
  Timer1.initialize(100);
  pinMode(RCK, OUTPUT);
  pinMode(SRCK, OUTPUT);
  pinMode(SER, OUTPUT);
  Timer1.attachInterrupt(doubleBuffer);
  Serial.begin(9600);

}

void doubleBuffer() {
  row[screenRow] = 0;
  col[screenCol] = 1;

  screenCol++;
  if (screenCol >= 8) {
    screenCol = 0;
    screenRow++;
    if (screenRow >= 8) {
      screenRow = 0;
    }
  }
  if ((screen[screenRow] >> screenCol) & B1 == B1) {
    row[screenRow] = 1;
    col[screenCol] = 0;
    digitalWrite(RCK, LOW);
    shiftOut(SER, SRCK, MSBFIRST, COL_DATA); //先选择列
    shiftOut(SER, SRCK, MSBFIRST, ROW_DATA); //再送行数据
    digitalWrite(RCK, HIGH);
  }
}

void allOFF() {
  for (int i = 0; i < 8; i++)
    screen[i] = B0;
}

void allON() {
  for (int i = 0; i < 8; i++)
    screen[i] = B11111111;
}

void loop() {
  UpdataDate();
  allOFF();
}

void UpdataDate() {
  if (animationIndex < animationFrames) {
    for (int i = 0; i < 64; i++) {
      brightnesses[i] = (animation[animationIndex][i / 4] >> (i % 4 * 2)) & B1;
      screen[7-i / 8] |= (brightnesses[i] << (i % 8)) ;
    }
    delay(animationDelays[animationIndex]);
    animationIndex ++;
    if (animationIndex >= animationFrames) {
      //restart animation index
      animationIndex = 0;
    }
  }
}

face.h：

int animationFrames = 2;

int animationDelays[] = { 1000, 1000 };

// Animation is designed for 8x8 pixels
uint8_t animation[][16] = {
  { 0x55, 0x55, 0x11, 0x44, 0x5, 0x50, 0x1, 0x40, 0x51, 0x45, 0x11, 0x44, 0x11, 0x44, 0x55, 0x55 },
  { 0x5, 0x50, 0x5, 0x50, 0x0, 0x0, 0x40, 0x1, 0x40, 0x1, 0x0, 0x0, 0x4, 0x10, 0x50, 0x5 }
};

程序下載地址：Face

程序運行結果：點陣模塊顯示笑臉和囧臉~

face.h文件通過點陣取模軟體獲得：