蓝桥杯学习|【第十三届蓝桥杯单片机省赛模拟冲刺02】蓝桥杯|单片机|c语言

第十三届蓝桥杯单片机省赛模拟冲刺02

题目来自电子设计工坊
最后一两周的时间在做两套模拟题，将各个模块的使用都练习一遍

【蓝桥杯学习|【第十三届蓝桥杯单片机省赛模拟冲刺02】】

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#include "reg52.h" #include "iic.h"/************************************** *第十三届蓝桥杯单片机省赛模拟 *Date:2022-3-29 *Author:小殷 ***************************************/sfr P4 = 0xc0; sbit H1 = P3^0; sbit H2 = P3^1; sbit H3 = P3^2; sbit H4 = P3^3; sbit L1 = P3^4; sbit L2 = P3^5; sbit L3 = P4^2; sbit L4 = P4^4; sbitLED1 = P0^0; sbitLED2 = P0^1; unsigned char s_press = 0,s_count = 0; //按键按下标志位和计时 unsigned char count = 0,led_flag = 0; //计时led标志位 unsigned char count_value = https://www.it610.com/article/0,count_value2 = 0; //按键值和保存值 unsigned char interface = 1; //界面 //数码管段码 unsigned char code smg_data[] = {0xC0,0xF9,0xA4,0xB0,0x99,0x92, 0x82,0xF8,0x80,0x90,0xbf,0xff}; //1简单延时 void delay(unsigned int t) { while(t--); }//操作锁存器 void Init_74HC138(unsigned char channel) { switch(channel) { case 4:P2 = (P2 & 0x1f) | 0x80; break; //Y4 case 5:P2 = (P2 & 0x1f) | 0xa0; break; //Y5 case 6:P2 = (P2 & 0x1f) | 0xc0; break; //Y6 case 7:P2 = (P2 & 0x1f) | 0xe0; break; //Y7 case 0:P2 = (P2 & 0x1f) | 0x00; break; //不选通任何一个 } P2 = (P2 & 0x1f) | 0x00; }//数码管安位操作 void SMG_DisplayBit(unsigned char pos,unsigned char dat) { P0 = (0x01 << pos); Init_74HC138(6); P0 = dat; Init_74HC138(7); }//操作所有数码管 void SMG_All(unsigned char dat) { P0 = 0xff; Init_74HC138(6); P0 = dat; Init_74HC138(7); }//显示数码管数据累加和减的数据 void SMG_Display_Data1(void) { //0001 0001->0x88 SMG_DisplayBit(0,0x88); delay(200); // SMG_DisplayBit(0,0xff); SMG_DisplayBit(1,0xff); delay(200); SMG_DisplayBit(2,0xff); delay(200); SMG_DisplayBit(3,0xff); delay(200); SMG_DisplayBit(4,0xff); delay(200); //3位数码管来显示键值 if(count_value > 99) { SMG_DisplayBit(5,smg_data[count_value/100]); delay(200); } if(count_value > 9) { SMG_DisplayBit(6,smg_data[count_value/10%10]); delay(200); } SMG_DisplayBit(7,smg_data[count_value%10]); delay(200); SMG_All(0xff); delay(200); }//系统初始化 void Init_System(void) { P0 = 0xff; Init_74HC138(4); P0 = 0x00; Init_74HC138(5); SMG_All(0xff); }//回显数据显示 void SMG_Display_Data2(void) { //1001 0001 ->0x89 SMG_DisplayBit(0,0x89); delay(200); // SMG_DisplayBit(0,0xff); SMG_DisplayBit(1,0xff); delay(200); SMG_DisplayBit(2,0xff); delay(200); SMG_DisplayBit(3,0xff); delay(200); SMG_DisplayBit(4,0xff); delay(200); //3位数码管来显示键值 if(count_value > 99) { SMG_DisplayBit(5,smg_data[count_value2/100]); delay(200); } if(count_value > 9) { SMG_DisplayBit(6,smg_data[count_value2/10%10]); delay(200); } SMG_DisplayBit(7,smg_data[count_value2%10]); delay(200); SMG_All(0xff); delay(200); }void Key_Scan(void) { H3 = 0; H1 = H2 = H4 = 1; L1 =L2 = L3 = L4 = 1; //S9回显 if(L3 == 0) { delay(20); if(L3 == 0) { while(L3 == 0){ if(interface == 1) { interface = 2; //界面切换 SMG_Display_Data1(); } else if(interface == 2) { interface = 1; SMG_Display_Data2(); } } } } //S5 减 else if(L4 == 0) { delay(20); if(L4 == 0) {while(L4 == 0) { SMG_Display_Data1(); } //在计数界面下进行键值的减 if(interface == 1) { count_value--; }} } H4 = 0; H1 = H2 = H3 = 1; L1 =L2 = L3 = L4 = 1; //S8 存储 if(L3 == 0) { delay(20); if(L3 == 0) { //每次按下时将计时和标志位清零 s_press = 0; s_count = 0; while(L3 == 0) { SMG_Display_Data1(); } if(s_press == 1)//长按标志 { count_value = https://www.it610.com/article/0; //计数清零 } //短按 else { if(interface == 1) { count_value2 = count_value; //保存当前值 } }} } //S4加 else if(L4 == 0) { delay(20); if(L4 == 0) {while(L4 == 0) { SMG_Display_Data1(); } //在计数界面下进行键值的累加 if(interface == 1) { count_value++; } } }}//dac数据 void Read_DAC(float dat) { IIC_Start(); IIC_SendByte(0x90); IIC_WaitAck(); IIC_SendByte(0x43); IIC_WaitAck(); IIC_SendByte(dat); IIC_WaitAck(); IIC_Stop(); }//电压显示 void Voltage_Tackle(void) { //为5非0 整数倍DAC->4ELSE DAC ->1 if((count_value % 5)== 0) { Read_DAC(204); //数字转模拟0-5->0-255 //5/255 = 4/x4x51 = 204 } else { Read_DAC(51); } }void Led_Tackle(void) { if(interface == 1) { LED1 = 0; } else { LED1 = 1; } if(count_value > count_value2) { if(led_flag == 0) { LED2 = 0; } else if(led_flag == 1) { LED2 = 1; } } Init_74HC138(4); }void Init_Timer(void) { TMOD = 0x01; TH0 = (65535-50000)/256; //50ms TL0 = (65535-50000)%256; ET0 = 1; TR0 = 1; EA= 1; } //主函数 void main(void) { Init_System(); Init_Timer(); while(1) { Key_Scan(); switch(interface) { case 1:SMG_Display_Data1(); break; case 2:SMG_Display_Data2(); break; } Led_Tackle(); Voltage_Tackle(); } }void Server_Timer0() interrupt 1 { TH0 = (65535-50000)/256; //50ms TL0 = (65535-50000)%256; count++; s_count++; if(count == 4) //0.2s 开启led标志位 { count = 0; if(led_flag == 0) { led_flag = 1; } else if(led_flag == 1) { led_flag = 0; } } if(s_count == 40) //定时2s { s_press = 1; //长按标志位置1 代表已进入长按模式 } }