cong-blue-bridge-cup蓝桥杯单片机资料

#include "reg52.h" sbit C1 = P2^7; sbit C2 = P2^6; sbit C3 = P2^5; sbit C4 = P2^4; sbit SW1 = P3^4; sbit SW2 = P3^3; sbit SW3 = P2^1; sbit SW4 = P2^0; //共阳数码管3641BH段码数组：0～9 const char SMGNoDot_CA[10]={0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x82, 0xf8, 0x80, 0x90}; unsigned char n1 = 0; //SW1按键的触发数累计变量 unsigned char n2 = 0; //SW2按键的触发数累计变量 unsigned char n3 = 0; //SW3按键的触发数累计变量 unsigned char n4 = 0; //SW4按键的触发数累计变量 unsigned char urdat; //串口接收数据变量 /*======================普通的延时程序======================*/ void Delay(unsigned int t) { while(t--); } /*======================数码管延时程序======================*/ void DelaySMG(unsigned char t) { while(t--); } /*====================数码管显示底层驱动==================== *功能：向指定位置的一位数码管输出指定的段码值。 *参数1 pos：数码管的位置 0：全部4个数码管。 1：第1个数码管 2：第2个数码管 3：第3个数码管 4：第4个数码管 *参数2 dat：数码管的段码值 ==========================================================*/ void DisplaySMG_Bit(unsigned char pos, unsigned char dat) { P0 = 0xff; //消隐 switch(pos) { case 0: C1 = 1;C2 = 1;C3 = 1;C4 = 1; break; case 1: C1 = 1;C2 = 0;C3 = 0;C4 = 0; break; case 2: C1 = 0;C2 = 1;C3 = 0;C4 = 0; break; case 3: C1 = 0;C2 = 0;C3 = 1;C4 = 0; break; case 4: C1 = 0;C2 = 0;C3 = 0;C4 = 1; break; } P0 = dat; //显示段码 } /*==================系统上电开始初始化显示==================*/ void Display_Open() { char i; //四个数码管同时倒数3333 ~ 1111 for(i = 3; i >= 1; i--) { C1 = 1;C2 = 1;C3 = 1;C4 = 1; P0 = SMGNoDot_CA[i]; Delay(50000); P0 = 0xff; Delay(30000); } //8个LED灯进行正向流水巡检 for(i = 0; i < 8; i++) { P1 = 0xff << i; Delay(10000); } //8个LED灯进行反向流水巡检 for(i = 0; i <= 8; i++) { P1 = ~(0xff >> i); Delay(10000); } } /*================实时显示每个按键触发的次数================*/ void Display_Keys() { DisplaySMG_Bit(1,SMGNoDot_CA[n1]); //第1位数码管：SW1按键 DelaySMG(200); DisplaySMG_Bit(2,SMGNoDot_CA[n2]); //第2位数码管：SW2按键 DelaySMG(200); DisplaySMG_Bit(3,SMGNoDot_CA[n3]); //第3位数码管：SW3按键 DelaySMG(200); DisplaySMG_Bit(4,SMGNoDot_CA[n4]); //第4位数码管：SW4按键 DelaySMG(200); DisplaySMG_Bit(0,0xff); //4个数码管全部关闭 DelaySMG(200); } /*======================按键扫描函数========================*/ void Scan_Keys() { if(SW1 == 0) { Delay(500); if(SW1 == 0) { while(SW1 == 0) { Display_Keys(); } n1++; if(n1 > 9) n1 = 0; } } if(SW2 == 0) { Delay(500); if(SW2 == 0) { while(SW2 == 0) { Display_Keys(); } n2++; if(n2 > 9) n2 = 0; } } if(SW3 == 0) { Delay(500); if(SW3 == 0) { while(SW3 == 0) { Display_Keys(); } n3++; if(n3 > 9) n3 = 0; } } if(SW4 == 0) { Delay(500); if(SW4 == 0) { while(SW4 == 0) { Display_Keys(); } n4++; if(n4 > 9) n4 = 0; } } } /*=======================初始化串口=========================*/ void Init_Uart() { TMOD = 0x20; TH1 = 0xf3; TL1 = 0xf3; TR1 = 1; //以上4句代码设置串口波特率为2400 SCON = 0x50; //允许接收数据 ES = 1; //使能串口中断 EA = 1; //使能总中断 } /*===================串口中断服务函数=======================*/ void ServiceUart() interrupt 4 { if(RI == 1) //判断是否为接收数据中断 { RI = 0; //清除接收标志位 urdat = SBUF; //从缓冲区取出接收到的数据 } } /*==================串口单字节发送函数======================*/ void SendByte(unsigned char dat) { SBUF = dat; while(TI == 0); TI = 0; } /*==================串口字符串发送函数======================*/ void SendString(unsigned char *str) { while(*str != '\0') { SendByte(*str++); } } /*========================主函数============================*/ void main() { Init_Uart(); Display_Open(); SendString("欢迎使用小蜜蜂XMF05系列开发板\r\n"); while(1) { Scan_Keys(); Display_Keys(); if(urdat == 0xa3) //如果串口接收到上位机0xA3命令字 { urdat = 0; P1 = ~P1; //对8个LED灯的开关状态取反 } } }