Bài 9: led ma trận

Bài 9: led ma trận

Yêu cầu: hiển thị chữ cái lên led ma trận

linh kiện sử dụng

• Arduino uno
• led ma trận 8x8
• IC74HC595

Mạch đi dây

Chương  trình điều khiển

#define DATA 8 //DS
#define LATCH 7 //ST_CP
#define CLOCK 9 //SH_CP
int row[]= {254, 253, 251, 247, 239, 223,191,127};
unsigned int characterHEX[][8] = {
{0x18,0x3C,0x66,0x66,0x7E,0x66,0x66,0x66},//A //Giải mã cho led ma trận
{0x78,0x64,0x68,0x78,0x64,0x66,0x66,0x7C},//B
{0x3C,0x62,0x60,0x60,0x60,0x62,0x62,0x3C},//C
{0x78,0x64,0x66,0x66,0x66,0x66,0x64,0x78},//D
{0x7E,0x60,0x60,0x7C,0x60,0x60,0x60,0x7E},//E
{0x7E,0x60,0x60,0x7C,0x60,0x60,0x60,0x60},//F
{0x3C,0x62,0x60,0x60,0x66,0x62,0x62,0x3C},//G
{0x66,0x66,0x66,0x7E,0x66,0x66,0x66,0x66},//H
{0x7E,0x18,0x18,0x18,0x18,0x18,0x18,0x7E},//I
{0x7E,0x18,0x18,0x18,0x18,0x18,0x1A,0x0C},//J
{0x62,0x64,0x68,0x70,0x70,0x68,0x64,0x62},//K
{0x60,0x60,0x60,0x60,0x60,0x60,0x60,0x7E},//L
{0xC3,0xE7,0xDB,0xDB,0xC3,0xC3,0xC3,0xC3},//M
{0x62,0x62,0x52,0x52,0x4A,0x4A,0x46,0x46},//N
{0x3C,0x66,0x66,0x66,0x66,0x66,0x66,0x3C},//O
{0x7C,0x62,0x62,0x7C,0x60,0x60,0x60,0x60},//P
{0x38,0x64,0x64,0x64,0x64,0x6C,0x64,0x3A},//Q
{0x7C,0x62,0x62,0x7C,0x70,0x68,0x64,0x62},//R
{0x1C,0x22,0x30,0x18,0x0C,0x46,0x46,0x3C},//S
{0x7E,0x18,0x18,0x18,0x18,0x18,0x18,0x18},//T
{0x66,0x66,0x66,0x66,0x66,0x66,0x66,0x3C},//U
{0x66,0x66,0x66,0x66,0x66,0x66,0x3C,0x18},//V
{0x81,0x81,0x81,0x81,0x81,0x99,0x99,0x66},//W
{0x42,0x42,0x24,0x18,0x18,0x24,0x42,0x42},//X
{0xC3,0x66,0x3C,0x18,0x18,0x18,0x18,0x18},//Y
{0x7E,0x02,0x04,0x08,0x10,0x20,0x40,0x7E},//Z
{0x3C,0x66,0x66,0x6E,0x76,0x66,0x66,0x3C},//0
{0x18,0x38,0x58,0x18,0x18,0x18,0x18,0x7E},//1
{0x3C,0x66,0x66,0x0C,0x18,0x30,0x7E,0x7E},//2
{0x7E,0x0C,0x18,0x3C,0x06,0x06,0x46,0x3C},//3
{0x0C,0x18,0x30,0x6C,0x6C,0x7E,0x0C,0x0C},//4
{0x7E,0x60,0x60,0x7C,0x06,0x06,0x46,0x3C},//5
{0x04,0x08,0x10,0x38,0x6C,0x66,0x66,0x3C},//6
{0x7E,0x46,0x0C,0x18,0x18,0x18,0x18,0x18},//7
{0x3C,0x66,0x66,0x3C,0x66,0x66,0x66,0x3C},//8
{0x3C,0x66,0x66,0x36,0x1C,0x08,0x10,0x20},//9
{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},// khoảng trắng
{0x00,0x66,0xFF,0xFF,0x7E,0x3C,0x18,0x00}// hình trái tim, kí hiệu là '&'
};
void displayImage(int hienthi, int thoigian) // hiển thị led
{
  for(int hold=0;hold   {
    for(int a=0;a<8;a++)
    {
      digitalWrite(LATCH, LOW);
      shiftOut(DATA, CLOCK, LSBFIRST,characterHEX[hienthi][a]);//column
      shiftOut(DATA, CLOCK, LSBFIRST,row[a]);//row
      digitalWrite(LATCH, HIGH);
      delay(1);
    }
  }
}
void cleanLed(int off) //tắt toàn bộ led
{
  for(int hold=0;hold   {
    for (int i =0; i< 8; i++)
    {
      digitalWrite(LATCH, LOW);
      shiftOut(DATA, CLOCK, LSBFIRST, 0);
      shiftOut(DATA, CLOCK, LSBFIRST, row[i]);
      digitalWrite(LATCH, HIGH);
      delay(1);
    }
  }
}

void setup() {
  pinMode(LATCH, OUTPUT);
  pinMode(CLOCK, OUTPUT);
  pinMode(DATA, OUTPUT);
}

void loop() {
  displayImage(1,100); //hiển thị chữ B
  cleanLed(100);
}

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