【蓝桥杯第十届省赛题-频率测量与电压输出】
【蓝桥杯第十届省赛题-频率测量与电压输出】
修改版：功能已完成刷新时间还没处理
#include "reg52.h"
#include "iic.h"
/*====================================================
Date:2022-1-15
Author:小殷同学
Version:1.0
=====================================================*/
sbit S7 = P3^0;
sbit S6 = P3^1;
sbit S5 = P3^2;
sbit S4 = P3^3;
sbit Led1 = P0^0;
sbit Led2 = P0^1;
sbit Led3 = P0^2;
sbit Led4 = P0^3;
sbit Led5 = P0^4;
//0-9 f -
unsigned char code SMG_Duan[] = {0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,
0x80,0x90,0x8E,0xbf,0xff};
unsigned char SMG_Duan_Dot[] = {0x40,0x79,0x34,0x30,0x19,0x12,0x02,0x78,0x00,0x10};
unsigned int f_count = 0,f_data = 0,t_count = 0;//频率存储和计时
unsigned int Rd2 = 0,u_dat2 = 0; //存储读取电压值
unsigned char setmode = 0;//界面模式切换 1->频率 2->电压
unsigned char smg_flag = 0; //0-》数码管正常使用 1-》熄灭
unsigned char led_flag = 0;//0-》led指示功能使用 1-》关闭
unsigned char k5 = 0;
//--------------------------------简单延时函数----------------------------
void Delay(unsigned char t)
{
while(t--);
}
//------------------------------74HC138初始化-----------------------------
void Init_74HC138(unsigned char n)
{
switch(n)
{
case 4:P2 = (P2 & 0x1f) | 0x80;break;
case 5:P2 = (P2 & 0x1f) | 0xa0;break;
case 6:P2 = (P2 & 0x1f) | 0xc0;break;
case 7:P2 = (P2 & 0x1f) | 0xe0;break;
}
}
//---------------------------------系统初始化-----------------------------
void Init_System(void)
{
Init_74HC138(4);
P0 = 0xff;//关闭led
Init_74HC138(5);
P0 = 0x00;//关闭继电器蜂鸣器
}
//------------------------------------数码管安位显示----------------------
void SMG_DisplayBit(unsigned char pos,unsigned char dat)
{
Init_74HC138(6);
P0 = (0x01 << pos);
Init_74HC138(7);
P0 = dat;
}
//-------------------------------------数码管显示-------------------------
void SMG_Close(void)
{
Init_74HC138(6);
P0 = 0xff;
Init_74HC138(7);
P0 = 0xff;
}
void SMG_Open(void)
{
Init_74HC138(6);
P0 = 0xff;
Init_74HC138(7);
P0 = 0x00;
}
void SMG_Display_F(void)
{
SMG_DisplayBit(0,SMG_Duan[10]);
Delay(200);
SMG_DisplayBit(1,0xff);
Delay(200);
if(f_data > 99999)
{
SMG_DisplayBit(2,SMG_Duan[f_data/100000]);
Delay(200);
}
if(f_data > 9999)
{
SMG_DisplayBit(3,SMG_Duan[f_data/10000%10]);
Delay(200);
}
if(f_data > 999)
{
SMG_DisplayBit(4,SMG_Duan[f_data/1000%10]);
Delay(200);
}
if(f_data > 99)
{
SMG_DisplayBit(5,SMG_Duan[f_data/100%10]);
Delay(200);
}
if(f_data > 9)
{
SMG_DisplayBit(6,SMG_Duan[f_data/10%10]);
Delay(200);
}
SMG_DisplayBit(7,SMG_Duan[f_data%10]);
Delay(200);
SMG_Close();
Delay(200);
}
void SMG_Display_AD(void)
{
SMG_DisplayBit(0,0xc1); // U
Delay(200);
SMG_DisplayBit(1,0xff);
Delay(200);
SMG_DisplayBit(2,0xff);
Delay(200);
SMG_DisplayBit(3,0xff);
Delay(200);
SMG_DisplayBit(4,0xff);
Delay(200);
SMG_DisplayBit(5,SMG_Duan_Dot[Rd2/100]);
Delay(200);
SMG_DisplayBit(6,SMG_Duan[Rd2/10%10]);
Delay(200);
SMG_DisplayBit(7,SMG_Duan[Rd2%10]);
Delay(200);
SMG_Close();
Delay(200);
}
//-----------------------------------定时器初始化---------------------------
void Init_Timer(void)
{
//定时器0计数 8位自动重装载值 方式二
TMOD = 0x16;
TH0 = 0xff;
TL0 = 0xff;
//定时器1定时
TH1 = (65535-50000)/256;
TL1 = (65535-50000)%256;
ET0 = 1; //定时器0中断使能
ET1 = 1; //定时器1中断使能
EA = 1; //中断总开关
TR0 = 1; //启动定时器0
TR1 = 1; //启动定时器1
}
//---------------------------------PCF8591ad-da--------------------------------
unsigned char PCF8591_ADC(void)
{
unsigned char temp;
IIC_Start();
IIC_SendByte(0x90);
IIC_WaitAck();
IIC_SendByte(0x43); //AIN3 可调电阻
IIC_WaitAck();
IIC_Stop();
IIC_Start();
IIC_SendByte(0x91); //读设备地址
IIC_WaitAck();
temp = IIC_RecByte();
IIC_SendAck(1); //非应答
IIC_Stop();
return temp;
}
//------------------------------------------DAC输出---------------//
void PCF8591_DAC(float dat)
{
IIC_Start(); //总线启动
IIC_SendByte(0X90); //地址字节 写数据
IIC_WaitAck(); //等待应答
IIC_SendByte(0X00); //控制字节 模拟输出使能
IIC_WaitAck(); //等待应答
IIC_SendByte(dat); //数据字节 数模转换的数据
IIC_WaitAck(); //等待应答
IIC_Stop(); //总线停止
}
//--------------------------------------按键处理-------------------------
void KeyScans(void)
{
//s4 进行频率和电压界面切换
if(smg_flag == 0)
{
if(S4 == 0)
{
Delay(20);
if(S4 == 0)
{
while(S4 == 0)
{
if(setmode == 0)
{
//显示电压
setmode = 1;
SMG_Display_AD();
}
else if(setmode == 1)
{
//显示频率
SMG_Display_F();
setmode = 0;
}
}
}
}
}
//控制DAC
if(S5 == 0)
{
Delay(20);
if(S5 == 0)
{
while(S5 == 0)
{
if(k5 == 0)
{
k5 = 1;
}
else if(k5 == 1)
{
k5 = 0;
}
SMG_Display_AD();
}
}
}
//控制指示灯
if(S6 == 0)
{
Delay(20);
if(S6 == 0)
{
while(S6 == 0){
if(led_flag == 0)
{
led_flag = 1;
}
else if(led_flag == 1)
{
Init_74HC138(4);
P0 = 0xff;
led_flag = 0;
}
}
}
}
//S7控制数码管的使能
if(S7 == 0)
{
Delay(20);
if(S7 == 0)
{
while(S7 == 0)
{
if(smg_flag == 0)
{
smg_flag = 1;
SMG_Open();
}
else if(smg_flag == 1)
{
smg_flag = 0;
SMG_Close(); //关闭所有数码管
}
}
}
}
}
//-------------------------------------主函数----------------------------
void main(void)
{
Init_System();
Init_Timer();
while(1)
{
//Rd2 = (Rd2 /255.0*5)*100; //乘100 换成整数好处理需要在显示的将百位一小数点显示就行
// 500/255 = 1.961
if(k5 == 0)
{
PCF8591_DAC(102.4);5V对应255,2V对应102.4
Rd2 = 200;
}
else if(k5 == 1)
{
u_dat2 = PCF8591_ADC();
Rd2 = u_dat2 * 1.961;
PCF8591_DAC(u_dat2);
}
KeyScans();
if(smg_flag == 0) //默认下数码管开启
{
switch(setmode)
{
case 0:SMG_Display_AD();break; //AD采集显示
case 1:SMG_Display_F();break; //频率显示
}
}
else
{
SMG_Close();
}
//F < 1KHZ Led4 熄灭 1< f< 5 亮 5 10亮
if(led_flag == 0)
{
Init_74HC138(4);
if(f_data < 1000)
{
Led4 = 1;
}
else if((f_data >= 1000) && (f_data < 5000))
{
Led4 = 0;
}
else if((f_data >= 5000) && (f_data < 10000))
{
Led4 = 1;
}
else
{
Led4 = 0;
}
//Rd2 < 1.5v Led3熄灭 1.5<= v <2.5 亮 2.5 <=v<3.5 熄灭 v>=3.5亮
//扩大100方便算
if(Rd2 < 150)
{
Led3 = 1;
}
else if((Rd2 >= 150) && (Rd2 < 250))
{
Led3 = 0;
}
else if((Rd2 >= 250) && (Rd2 < 350))
{
Led3 = 1;
}
else
{
Led3 = 0;
}
//电压测量功能指示：L1点亮，L2熄灭 频率测量功能指示：L1熄灭，L2点亮
if(setmode == 0) //电压模式
{
Led1 = 0;
Led2 = 1;
}
else
{
Led1 = 1;
Led2 = 0;
}
}
}
}
//---------------------------------中断服务函数----------------------------
void Server_Timer0() interrupt 1
{
f_count++;
}
void Server_Timer1() interrupt 3
{
TH1 = (65535-50000)/256;
TL1 = (65535-50000)%256;
t_count++;
if(t_count == 20) //1s
{
f_data = f_count;
f_count = 0;
t_count = 0;
}
}