AT89C51 微控制器：4×4 矩阵键盘与 6 位共阳极 LED 动态显示程序实现

以下是一个使用 AT89C51 微控制器实现外接 4×4 矩阵键盘和 6 位共阳极 LED 动态显示器，并满足上述功能的示例程序： ```c #include <reg51.h> // 共阳极数码管段码 unsigned char code SEGMENT_CODE[] = { 0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x82, 0xf8, 0x80, 0x90, 0x88, 0x83, 0xc6, 0xa1, 0x86, 0x8e }; // 定义按键值 unsigned char KEY_VALUE[] = { 0x07, 0x04, 0x08, 0x05, 0x01, 0x02, 0x03, 0x06, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10 }; // 定义运算符字形码 unsigned char OPERATOR_CODE[] = { 0xbf, // '+' 0xbf, // '-' 0xbf, // '*' 0xbf, // '/' 0xbf // '=' }; // 显示缓冲区 unsigned char DISPLAY_BUFFER[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; // 矩阵键盘扫描函数 unsigned char ScanKey() { unsigned char row, col, key_value = 0xff; P3 = 0xf0; if ((P3 & 0xf0)!= 0xf0) { delay_ms(10); if ((P3 & 0xf0)!= 0xf0) { for (row = 0; row < 4; row++) { P3 = ~(0x08 >> row); col = (P3 & 0xf0); if (col!= 0xf0) { key_value = KEY_VALUE[row * 4 + (col >> 4)]; break; } } } } return key_value; } // 显示函数 void Display() { static unsigned char i = 0; P2 = 0x01 << i; P0 = ~DISPLAY_BUFFER[i]; i++; if (i == 6) { i = 0; } } void main() { unsigned char key, op = 0, num1 = 0, num2 = 0, result = 0; unsigned char flag = 0; while (1) { key = ScanKey(); if (key!= 0xff) { if (key >= 0x00 && key <= 0x09) { // 数字键 if (flag == 0) { num1 = num1 * 10 + key; } else { num2 = num2 * 10 + key; } } else if (key == 0x0d) { // '=' 键 switch (op) { case 0: result = num1 + num2; break; case 1: result = num1 - num2; break; case 2: result = num1 * num2; break; case 3: if (num2!= 0) { result = num1 / num2; } else { result = 0; } break; } flag = 0; num1 = result; num2 = 0; } else if (key == 0x0c) { // 'C' 键 num1 = 0; num2 = 0; op = 0; result = 0; flag = 0; for (i = 0; i < 6; i++) { DISPLAY_BUFFER[i] = 0xff; } } else { // 运算符键 op = key - 0x0a; flag = 1; } // 转换为数码管显示 DISPLAY_BUFFER[0] = SEGMENT_CODE[num1 / 10000]; DISPLAY_BUFFER[1] = SEGMENT_CODE[(num1 % 10000) / 1000]; DISPLAY_BUFFER[2] = SEGMENT_CODE[(num1 % 1000) / 100]; DISPLAY_BUFFER[3] = SEGMENT_CODE[(num1 % 100) / 10]; DISPLAY_BUFFER[4] = SEGMENT_CODE[num1 % 10]; if (flag == 1) { DISPLAY_BUFFER[5] = OPERATOR_CODE[op]; } else { DISPLAY_BUFFER[5] = 0xff; } } Display(); } } // 延时函数 void delay_ms(unsigned int ms) { unsigned int i, j; for (i = 0; i < ms; i++) for (j = 0; j < 110; j++); } ``` 这只是一个基本的示例程序，您可能需要根据实际的硬件连接和具体需求进行调整和优化。 ######[AI写代码神器 | 1344点数解答 | 2024-11-07 17:29:16]