8x8矩陣顯示器實習(2)-跑跑小藍人

 8x8矩陣顯示器實習-跑跑小藍人

材料:

Arduino uno x1

8x8矩陣顯示模組(內含max7219)

接線方式:

圖片來源於:https://create.arduino.cc/projecthub/CiferTech/8x8-led-matrix-tutorial-project-code-and-schematic-969e60

觀念速記

控制顯示器的閘門主要是max7219,在一開始時先設定好max7219

的暫存器的設定值,包含了{顯示強度, 顯示檢測, 解碼, 停機, 掃描

限制,不運作},運送資料的方式類似寄送mail,首先要有郵址,該信件

傳送到該擁有者,開啓信件觀看到內容.所以傳送資料的方式是先

把SS設定為0,CLK時脈計算同步時間,MOSI,MISO傳送資料的收發.

程式碼

1. #include <SPI.h>
2.  
3. const byte actionLed[8][8]={
4. {0x00,0x8b,0xef,0x3c,0x18,0xa0,0xc0,0x00}, //1
5. {0x00,0xdb,0x6f,0x3c,0x18,0x28,0xd0,0x00}, //2
6. {0x10,0x4b,0x5f,0x3c,0x28,0x48,0xd0,0x00}, //3
7. {0x53,0x4f,0x3c,0x18,0x28,0x48,0x90,0x00}, //4
8. {0x93,0x8f,0xfc,0x38,0x28,0x50,0xe0,0x00}, //5
9. {0x93,0xcf,0x3c,0x38,0x48,0xd0,0x20,0x00}, //6
10. {0x03,0x5f,0xbc,0x78,0xc8,0x30,0x00,0x00}, //7
11. {0x00,0x03,0x0f,0x7c,0x58,0xe0,0x00,0x00} //8
12. };
13.  
14. //定義max7219暫存器
15. const byte NOOP=0x0;
16. const byte DECODEMODE=0X9;
17. const byte INTENSITY=0xA;
18. const byte SCANLIMIT=0xB;
19. const byte SHUTDOWN=0xC;
20. const byte DISPLAYTEST=0xF;
21.  
22. //max7219函式
23. void max7219(byte reg, byte data){
24. digitalWrite(SS, LOW);
25. SPI.transfer(reg);
26. SPI.transfer(data);
27. digitalWrite(SS, HIGH);
28. }
29.  
30. void setup(){
31. SPI.begin();
32.  
33. max7219(SCANLIMIT, 7);
34. max7219(DECODEMODE, 0);
35. max7219(INTENSITY, 6);
36. max7219(DISPLAYTEST, 0);
37. max7219(SHUTDOWN, 1);
38.  
39. for (int i=0; i<8; i++){
40. max7219(i+1, 0);
41. }
42. }
43.  
44. void loop(){
45. for (int j=0; j<8; j++){
46. for (int i=0; i<8; i++){
47. max7219(i+1, actionLed[j][i]);
48. }
49. delay(500);
50. }
51. }

實作成果