文章目錄

• • 1 點陣的驅動
  • • 1.1 8*8點陣的原理圖
    • 1.2 點亮點陣中的1個點
    • 1.3 點陣上顯示圖形
    • 1.4 縱向動態顯示
    • 1.5 橫向動態顯示

1 點陣的驅動

1.1 8*8點陣的原理圖

1.2 點亮點陣中的1個點

#include <reg52.h> sbit LED = P0 ^ 0; sbit ADDR0 = P1 ^ 0; sbit ADDR1 = P1 ^ 1; sbit ADDR2 = P1 ^ 2; sbit ADDR3 = P1 ^ 3; sbit ENLED = P1 ^ 4; void main() {ENLED = 0; //U3、U4 兩片 74HC138 總使能ADDR3 = 0; //使能 U4 使之正常輸出ADDR2 = 0; //經 U4 的 Y0 輸出開啟三極管 Q10ADDR1 = 0;ADDR0 = 0;LED = 0; //向 P0.0 寫入 0 來點亮左上角的一個點while (1); //程序停止在這里 }

1.3 點陣上顯示圖形

利用動態刷新的原理。

#include <reg52.h> sbit ADDR0 = P1 ^ 0; sbit ADDR1 = P1 ^ 1; sbit ADDR2 = P1 ^ 2; sbit ADDR3 = P1 ^ 3; sbit ENLED = P1 ^ 4; unsigned char code image[] = { //圖片的字模表0xFF, 0x99, 0x00, 0x00, 0x00, 0x81, 0xC3, 0xE7 }; void main() {EA = 1; //使能總中斷ENLED = 0; //使能 U4，選擇 LED 點陣ADDR3 = 0;TMOD = 0x01; //設置 T0 為模式 1TH0 = 0xFC; //為 T0 賦初值 0xFC67，定時 1msTL0 = 0x67;ET0 = 1; //使能 T0 中斷TR0 = 1; //啟動 T0while (1); } /* 定時器 0 中斷服務函數 */ void InterruptTimer0() interrupt 1 {static unsigned char i = 0; //動態掃描的索引TH0 = 0xFC; //重新加載初值TL0 = 0x67;//以下代碼完成 LED 點陣動態掃描刷新P0 = 0xFF; //顯示消隱switch (i){case 0: ADDR2 = 0; ADDR1 = 0; ADDR0 = 0; i++; P0 = image[0]; break;case 1: ADDR2 = 0; ADDR1 = 0; ADDR0 = 1; i++; P0 = image[1]; break;case 2: ADDR2 = 0; ADDR1 = 1; ADDR0 = 0; i++; P0 = image[2]; break;case 3: ADDR2 = 0; ADDR1 = 1; ADDR0 = 1; i++; P0 = image[3]; break;case 4: ADDR2 = 1; ADDR1 = 0; ADDR0 = 0; i++; P0 = image[4]; break;case 5: ADDR2 = 1; ADDR1 = 0; ADDR0 = 1; i++; P0 = image[5]; break;case 6: ADDR2 = 1; ADDR1 = 1; ADDR0 = 0; i++; P0 = image[6]; break;case 7: ADDR2 = 1; ADDR1 = 1; ADDR0 = 1; i = 0; P0 = image[7]; break;default: break;} }

1.4 縱向動態顯示

#include <reg52.h> sbit ADDR0 = P1 ^ 0; sbit ADDR1 = P1 ^ 1; sbit ADDR2 = P1 ^ 2; sbit ADDR3 = P1 ^ 3; sbit ENLED = P1 ^ 4; unsigned char code image[] = { //圖片的字模表0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xC3,0xE7,0xE7,0xE7,0xE7,0xE7,0xC3,0xFF,0x99,0x00,0x00,0x00,0x81,0xC3,0xE7,0xFF,0x99,0x99,0x99,0x99,0x99,0x81,0xC3,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF }; void main() {EA = 1; //使能總中斷ENLED = 0; //使能 U4，選擇 LED 點陣ADDR3 = 0;TMOD = 0x01; //設置 T0 為模式 1TH0 = 0xFC; //為 T0 賦初值 0xFC67，定時 1msTL0 = 0x67;ET0 = 1; //使能 T0 中斷TR0 = 1; //啟動 T0while (1); } /* 定時器 0 中斷服務函數 */ void InterruptTimer0() interrupt 1 {static unsigned char i = 0; //動態掃描的索引static unsigned char tmr = 0; //250ms 軟件定時器static unsigned char index = 0; //圖片刷新索引TH0 = 0xFC; //重新加載初值TL0 = 0x67;//以下代碼完成 LED 點陣動態掃描刷新P0 = 0xFF; //顯示消隱switch (i){case 0: ADDR2 = 0; ADDR1 = 0; ADDR0 = 0; i++; P0 = image[index + 0]; break;case 1: ADDR2 = 0; ADDR1 = 0; ADDR0 = 1; i++; P0 = image[index + 1]; break;case 2: ADDR2 = 0; ADDR1 = 1; ADDR0 = 0; i++; P0 = image[index + 2]; break;case 3: ADDR2 = 0; ADDR1 = 1; ADDR0 = 1; i++; P0 = image[index + 3]; break;case 4: ADDR2 = 1; ADDR1 = 0; ADDR0 = 0; i++; P0 = image[index + 4]; break;case 5: ADDR2 = 1; ADDR1 = 0; ADDR0 = 1; i++; P0 = image[index + 5]; break;case 6: ADDR2 = 1; ADDR1 = 1; ADDR0 = 0; i++; P0 = image[index + 6]; break;case 7: ADDR2 = 1; ADDR1 = 1; ADDR0 = 1; i = 0; P0 = image[index + 7]; break;default: break;}//以下代碼完成每 250ms 改變一幀圖像tmr++;if (tmr >= 250) //達到 250ms 時改變一次圖片索引{tmr = 0;index++;if (index >= 32) //圖片索引達到 32 后歸零{index = 0;}} }

1.5 橫向動態顯示

#include <reg52.h> sbit ADDR0 = P1 ^ 0; sbit ADDR1 = P1 ^ 1; sbit ADDR2 = P1 ^ 2; sbit ADDR3 = P1 ^ 3; sbit ENLED = P1 ^ 4; unsigned char code image[30][8] = {{0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF}, //動畫幀 1{0xFF,0x7F,0xFF,0xFF,0xFF,0xFF,0xFF,0x7F}, //動畫幀 2{0xFF,0x3F,0x7F,0x7F,0x7F,0x7F,0x7F,0x3F}, //動畫幀 3{0xFF,0x1F,0x3F,0x3F,0x3F,0x3F,0x3F,0x1F}, //動畫幀 4{0xFF,0x0F,0x9F,0x9F,0x9F,0x9F,0x9F,0x0F}, //動畫幀 5{0xFF,0x87,0xCF,0xCF,0xCF,0xCF,0xCF,0x87}, //動畫幀 6{0xFF,0xC3,0xE7,0xE7,0xE7,0xE7,0xE7,0xC3}, //動畫幀 7{0xFF,0xE1,0x73,0x73,0x73,0xF3,0xF3,0xE1}, //動畫幀 8{0xFF,0x70,0x39,0x39,0x39,0x79,0xF9,0xF0}, //動畫幀 9{0xFF,0x38,0x1C,0x1C,0x1C,0x3C,0x7C,0xF8}, //動畫幀 10{0xFF,0x9C,0x0E,0x0E,0x0E,0x1E,0x3E,0x7C}, //動畫幀 11{0xFF,0xCE,0x07,0x07,0x07,0x0F,0x1F,0x3E}, //動畫幀 12{0xFF,0x67,0x03,0x03,0x03,0x07,0x0F,0x9F}, //動畫幀 13{0xFF,0x33,0x01,0x01,0x01,0x03,0x87,0xCF}, //動畫幀 14{0xFF,0x99,0x00,0x00,0x00,0x81,0xC3,0xE7}, //動畫幀 15{0xFF,0xCC,0x80,0x80,0x80,0xC0,0xE1,0xF3}, //動畫幀 16{0xFF,0xE6,0xC0,0xC0,0xC0,0xE0,0xF0,0xF9}, //動畫幀 17{0xFF,0x73,0x60,0x60,0x60,0x70,0x78,0xFC}, //動畫幀 18{0xFF,0x39,0x30,0x30,0x30,0x38,0x3C,0x7E}, //動畫幀 19{0xFF,0x9C,0x98,0x98,0x98,0x9C,0x1E,0x3F}, //動畫幀 20{0xFF,0xCE,0xCC,0xCC,0xCC,0xCE,0x0F,0x1F}, //動畫幀 21{0xFF,0x67,0x66,0x66,0x66,0x67,0x07,0x0F}, //動畫幀 22{0xFF,0x33,0x33,0x33,0x33,0x33,0x03,0x87}, //動畫幀 23{0xFF,0x99,0x99,0x99,0x99,0x99,0x81,0xC3}, //動畫幀 24{0xFF,0xCC,0xCC,0xCC,0xCC,0xCC,0xC0,0xE1}, //動畫幀 25{0xFF,0xE6,0xE6,0xE6,0xE6,0xE6,0xE0,0xF0}, //動畫幀 26{0xFF,0xF3,0xF3,0xF3,0xF3,0xF3,0xF0,0xF8}, //動畫幀 27{0xFF,0xF9,0xF9,0xF9,0xF9,0xF9,0xF8,0xFC}, //動畫幀 28{0xFF,0xFC,0xFC,0xFC,0xFC,0xFC,0xFC,0xFE}, //動畫幀 29{0xFF,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFF} //動畫幀 30 }; void main() {EA = 1; //使能總中斷ENLED = 0; //使能 U4，選擇 LED 點陣ADDR3 = 0;TMOD = 0x01; //設置 T0 為模式 1TH0 = 0xFC; //為 T0 賦初值 0xFC67，定時 1msTL0 = 0x67;ET0 = 1; //使能 T0 中斷TR0 = 1; //啟動 T0while (1); } /* 定時器 0 中斷服務函數 */ void InterruptTimer0() interrupt 1 {static unsigned char i = 0; //動態掃描的索引static unsigned char tmr = 0; //250ms 軟件定時器static unsigned char index = 0; //圖片刷新索引TH0 = 0xFC; //重新加載初值TL0 = 0x67;//以下代碼完成 LED 點陣動態掃描刷新P0 = 0xFF; //顯示消隱switch (i){case 0: ADDR2 = 0; ADDR1 = 0; ADDR0 = 0; i++; P0 = image[index][0]; break;case 1: ADDR2 = 0; ADDR1 = 0; ADDR0 = 1; i++; P0 = image[index][1]; break;case 2: ADDR2 = 0; ADDR1 = 1; ADDR0 = 0; i++; P0 = image[index][2]; break;case 3: ADDR2 = 0; ADDR1 = 1; ADDR0 = 1; i++; P0 = image[index][3]; break;case 4: ADDR2 = 1; ADDR1 = 0; ADDR0 = 0; i++; P0 = image[index][4]; break;case 5: ADDR2 = 1; ADDR1 = 0; ADDR0 = 1; i++; P0 = image[index][5]; break;case 6: ADDR2 = 1; ADDR1 = 1; ADDR0 = 0; i++; P0 = image[index][6]; break;case 7: ADDR2 = 1; ADDR1 = 1; ADDR0 = 1; i = 0; P0 = image[index][7]; break;default: break;}//以下代碼完成每 250ms 改變一幀圖像tmr++;if (tmr >= 250) //達到 250ms 時改變一次圖片索引{tmr = 0;index++;if (index >= 30) //圖片索引達到 30 后歸零{index = 0;}} }

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參考資料：

手把手教你學51單片機:C語言版

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