蓝桥杯单片机第七届国赛题目-电压频率采集设备
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题目
要点
- 选取数码管闪烁
- NE555初始化和检测检测
- 矩阵按键
其他应该就没有什么难点了，很常规这套题，只不过就是题没说清楚开机的时候应该处于什么状态，这里我默认就是时钟显示状态了
文件树
代码
init.c
#include "init.h"
uchar code table[4][4] = {0,1,1,1, 1,0,1,1, 1,1,0,1, 1,1,1,0};
void SL(uchar _dev, uchar _data)
{
P0=_data;SEL(_dev);
}
void Timer1Init(void) //2毫秒@12.000MHz
{
AUXR |= 0x40; //定时器时钟1T模式
TMOD &= 0x0F; //设置定时器模式
TL1 = 0x40; //设置定时初值
TH1 = 0xA2; //设置定时初值
TF1 = 0; //清除TF1标志
TR1 = 1; //定时器1开始计时
ET1 = 1;
EA = 1;
}
void BF(_0, _1, _2, _3,
_4, _5, _6, _7)
{
buf[0] = _0; buf[1] = _1; buf[2] = _2; buf[3] = _3;
buf[4] = _4; buf[5] = _5; buf[6] = _6; buf[7] = _7;
}
uchar FR(float _data, uchar _dig)
{
uint i = 1;
while(_dig--)
{
i = i * 10;
}
return((uint)_data/i%10);
}
//uchar LedChange(uchar _data, uchar _dig, uchar _en)
//{
// if(_en == 1)
// {
// _data &= ~(1 << _dig);
// }
// else if(_en == 0)
// {
// _data |= (1 << _dig);
// }
// else
// {
// _data ^= (1 << _dig);
// }
// SL(4, _data);
// return _data;
//}
void Run(t_delay* time)
{
if(time->cnt++ < time->max);
else
{
time->cnt = 0;
time->ok = 1;
}
}
void NE555Init()
{
AUXR |= 0x80;
TMOD |= 0x05;
}
void NE555Read()
{
if(delay_500.ok == 0)
{
TH0 = 0; TL0 = 0; TR0 = 1;
delay_500.ok = 2;
}
if(delay_500.ok == 1)
{
delay_500.ok = 0;
delay_500.cnt = 0;
TR0 = 0;
neVal = ((uint)TH0<<8) | TL0;
}
}
uchar GetKey()
{
uchar i;
C1 = 1; C2 = 1;
for(i = 0; i < 4; i++)
{
R1 = table[i][0];R2 = table[i][1];
R3 = table[i][2];R4 = table[i][3];
if(C1 == 0) return(2*i + 1);
if(C2 == 0) return(2*i + 2);
}
//!!!!!!!
return 0;
}
main.c
#include "init.h"
enum{LED=4,EXT,SEL,CODE};
uchar ledData = 0xff;
//显示
uchar buf[8];
uchar code CA[] = {0xc0, 0xf9, 0xa4, 0xb0, 0x99,
0x92, 0x82, 0xf8, 0x80, 0x90,
0xff, 0xbf};
uchar curDig = 0;
//按键
enum{KS_GT,KS_AS,KS_WA}keyState = KS_GT;
uchar key = 0, tmpKey = 0, keyCnt = 0;
//变量
t_delay delay_200 = {200, 0, 0};
t_delay delay_500 = {500, 0, 0};
t_delay delay_250 = {250, 0, 0};
uint neVal;
uint hlv[] = {2000,1000};
uchar chlv[] = {(2000 >> 8), 2000, (1000 >> 8), 1000};
uchar timeDig = 250;
uchar volDig = 250;
uchar freDig = 0;
uchar leiXing = 0;
uchar cxDig = 0;
uchar storetime[3] = {12, 12, 12};
//状态
enum{S_TIME, S_VOL, S_FRE, S_CX}gloSta = S_TIME;
void Timer1Handle() interrupt 3
{
SL(CODE, 0xff); SL(SEL, 1<<curDig); SL(CODE, CA[buf[curDig]]);
curDig = (curDig + 1)%8;
//按键
switch(keyState)
{
case KS_GT:
keyCnt = 0; tmpKey = GetKey(); keyState = KS_AS;
break;
case KS_AS:
if(keyCnt++ < 10);
else if(tmpKey == GetKey())
{
if(key != tmpKey)
{
key = tmpKey;
keyState = KS_WA;
}
else
keyState = KS_GT;
}
else
{
keyState = KS_GT;
}
break;
}
//计时
Run(&delay_200);
if(delay_500.ok == 2)
Run(&delay_500);
Run(&delay_250);
}
//显示处理
void DisProcess()
{
switch(gloSta)
{
//如果是时钟状态
case S_TIME:
//如果在时钟显示，则直接显示
if(timeDig == 250)
BF(FR(time[2], 1), FR(time[2], 0),F_SEP,
FR(time[1], 1),FR(time[1], 0),F_SEP,FR(time[0], 1),FR(time[0], 0));
//否则是在时钟设置状态
else
{
//500ms闪烁
if(delay_250.ok == 1)
{
delay_250.ok = 0;
//根据设置的具体位置决定闪烁在哪
switch(timeDig)
{
case 0:
if(buf[0] == F_C)
BF(FR(time[2], 1), FR(time[2], 0),F_SEP,
FR(time[1], 1),FR(time[1], 0),F_SEP,FR(time[0], 1),FR(time[0], 0));
else
BF(F_C, F_C,F_SEP,
FR(time[1], 1),FR(time[1], 0),F_SEP,FR(time[0], 1),FR(time[0], 0));
break;
case 1:
if(buf[3] == F_C)
BF(FR(time[2], 1), FR(time[2], 0),F_SEP,
FR(time[1], 1),FR(time[1], 0),F_SEP,FR(time[0], 1),FR(time[0], 0));
else
BF(FR(time[2], 1), FR(time[2], 0),F_SEP,
F_C,F_C,F_SEP,FR(time[0], 1),FR(time[0], 0));
break;
case 2:
if(buf[6] == F_C)
BF(FR(time[2], 1), FR(time[2], 0),F_SEP,
FR(time[1], 1),FR(time[1], 0),F_SEP,FR(time[0], 1),FR(time[0], 0));
else
BF(FR(time[2], 1), FR(time[2], 0),F_SEP,
FR(time[1], 1),FR(time[1], 0),F_SEP,F_C,F_C);
break;
}
}
}
break;
case S_VOL:
if(volDig == 250)
BF(F_SEP, 1,F_SEP,
F_C,FR(adcVal, 3),FR(adcVal, 2),FR(adcVal, 1),FR(adcVal, 0));
//如果是电压触发阈值设置
else
{
if(delay_250.ok == 1)
{
delay_250.ok = 0;
//根据设置的位置闪烁
switch(volDig)
{
case 0:
if(buf[0] == F_C)
BF(FR(hlv[0], 3), FR(hlv[0], 2),FR(hlv[0], 1),FR(hlv[0], 0),
FR(hlv[1], 3), FR(hlv[1], 2),FR(hlv[1], 1),FR(hlv[1], 0));
else
BF(F_C, F_C,F_C,F_C,
FR(hlv[1], 3), FR(hlv[1], 2),FR(hlv[1], 1),FR(hlv[1], 0));
break;
case 1:
if(buf[4] == F_C)
BF(FR(hlv[0], 3), FR(hlv[0], 2),FR(hlv[0], 1),FR(hlv[0], 0),
FR(hlv[1], 3), FR(hlv[1], 2),FR(hlv[1], 1),FR(hlv[1], 0));
else
BF(FR(hlv[0], 3), FR(hlv[0], 2),FR(hlv[0], 1),FR(hlv[0], 0),
F_C, F_C,F_C,F_C);
break;
}
}
}
break;
case S_FRE:
if(freDig == 0)
BF(F_SEP, 2, F_SEP,FR(neVal, 4),
FR(neVal, 3), FR(neVal, 2),FR(neVal, 1),FR(neVal, 0));
//如果是周期显示,则显示周期
else if(freDig == 1)
{
float m;
m = 1000000/neVal; //周期
BF(F_SEP, 2, F_SEP,FR(m, 4),
FR(m, 3), FR(m, 2),FR(m, 1蓝桥杯单片机第七届国赛笔记