请教单片机设置参数的方法

daiya · 发表于 2015-11-17 16:34:31

程序中红色部分是一种参数设置方法，按SET键切换参数，按UP键+，按DOWN键-。可是每设置一个参数都要调用按键扫描函数keyscan()，各位高人有没有更方便的办法实现参数设置呢？

#include<reg51.h>

unsigned char code LedChar[] = {
0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,
0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e
};
unsigned char LedBuff[4] = {0xff,0xff,0xff,0xff};

sbit gewei = P1^3;
sbit shiwei = P1^2;
sbit baiwei = P1^1;
unsigned char i = 0;

unsigned char iset = 0;

signed int disp0 = 15;
signed int disp1 = 21;

void delayms(unsigned int k)
{
unsigned int i,j;
for(i=k;i>0;i--)
for(j=110;j>0;j--);
}

unsigned char keyscan(void)
{
unsigned char keynum=0;
unsigned char temp=0;
P3=0xff; //P3口置oxff，准备读取输入值
if(P3!=0xff) //判断是否有键按下
{
delayms(10); //延时10ms消抖动
P3=0xff; //P3口置oxff，准备2次读取输入值
if(P3!=0xff) //2次判断是否有键按下
{
temp=P3; //读取P3口值至temp中
while(P3!=0xff); //按键释放检测语句
switch(temp) //进入开关多分支语句判断
{
case 0xfb:
keynum=1; //SET键
break;
case 0xf7:
keynum=2; //LEFT键
break;
case 0xef:
keynum=3; //UP键
break;
case 0xdf:
keynum=4; //DOWN键
break;
case 0xbf:
keynum=5; //模拟SET键长按
break;
case 0x7f:
keynum=6; //模拟LEFT键长按
break;
default:
break;
}
}
}

return keynum;
}

void main()
{
unsigned long sec = 0;
unsigned char key;

EA = 1;
TMOD = 0x01;
TH0 = 0xfc;
TL0 = 0x67;
ET0 = 1;
TR0 = 1;

while(1)
{
if(iset == 0)
{
key = keyscan();
if(key == 1) //SET键
{
iset++;
}
if(key == 3) //UP键
{
disp0++;
}
if(key == 4) //DOWN键
{
disp0--;
}
LedBuff[0] = LedChar[disp0 % 10];
LedBuff[1] = LedChar[disp0 / 10 % 10];
LedBuff[2] = LedChar[disp0 / 100 % 10];
}
else if(iset == 1)
{
key = keyscan();
if(key == 1) //SET键
{
iset++;
}
if(key == 3) //UP键
{
disp1++;
}
if(key == 4) //DOWN键
{
disp1--;
}
LedBuff[0] = LedChar[disp1 % 10];
LedBuff[1] = LedChar[disp1 / 10 % 10];
LedBuff[2] = LedChar[disp1 / 100 % 10];
}

}
}

void InterruptTimer0() interrupt 1
{
TH0 = 0xfc;
TL0 = 0x67;

P0 = 0xff;
if(i == 0)
{
baiwei = 1;
shiwei = 1;
gewei = 0;
i++;
P0 = LedBuff[0];
}
else if(i == 1)
{
baiwei = 1;
shiwei = 0;
gewei = 1;
i++;
P0 = LedBuff[1];
}
else if(i == 2)
{
baiwei = 0;
shiwei = 1;
gewei = 1;
i = 0;
P0 = LedBuff[2];
}
}

lcw_swust · 发表于 2015-11-17 19:20:16

while(1)
      {
   key = keyscan();
         if(iset == 0)
               ...
         if(iset == 1)
               ...

建议keyscan内不要死等,应当用if语句或用状态机判断按键的按下\放开.

xiaobendan · 发表于 2015-11-17 20:09:59

本帖最后由 xiaobendan 于 2015-11-17 20:11 编辑

效率比较低
我一般的方法是，参数放在数组里面，DIS平时就显示参数【0】
然后

switch(key){
case 1:
set++;
break;
case 2:
参数[set]++;
break;
case 3:
参数[set]--;
break;
}

复制代码

在主循环里面判断set大于0则把参数[set]复制到参数【0】

daiya · 发表于 2015-11-17 22:22:52

本帖最后由 daiya 于 2015-11-17 23:07 编辑

lcw_swust 发表于 2015-11-17 19:20
while(1)
{
key = keyscan();

按照您的方法改了，效果很好！

#include<reg51.h>

unsigned char code LedChar[] = {
0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,
0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e
};
unsigned char LedBuff[4] = {0xff,0xff,0xff,0xff};

sbit gewei = P1^3;
sbit shiwei = P1^2;
sbit baiwei = P1^1;
unsigned char i = 0;

unsigned char iset = 0;

signed int disp = 0;
signed int disp0 = 15;
signed int disp1 = 21;

void delayms(unsigned int k)
{
unsigned int i,j;
for(i=k;i>0;i--)
for(j=110;j>0;j--);
}

unsigned char keyscan(void)
{
unsigned char keynum=0;
unsigned char temp=0;
P3=0xff; //P3口置oxff，准备读取输入值
if(P3!=0xff) //判断是否有键按下
{
delayms(10); //延时10ms消抖动
P3=0xff; //P3口置oxff，准备2次读取输入值
if(P3!=0xff) //2次判断是否有键按下
{
temp=P3; //读取P3口值至temp中
while(P3!=0xff); //按键释放检测语句
switch(temp) //进入开关多分支语句判断
{
case 0xfb:
keynum=1; //SET键
break;
case 0xf7:
keynum=2; //LEFT键
break;
case 0xef:
keynum=3; //UP键
break;
case 0xdf:
keynum=4; //DOWN键
break;
case 0xbf:
keynum=5; //模拟SET键长按
break;
case 0x7f:
keynum=6; //模拟LEFT键长按
break;
default:
break;
}
}
}

return keynum;
}

void main()
{
unsigned long sec = 0;
unsigned char key;

EA = 1;
TMOD = 0x01;
TH0 = 0xfc;
TL0 = 0x67;
ET0 = 1;
TR0 = 1;

while(1)
{
key = keyscan();
if(iset == 0)
{
if(key == 1) //SET键
{
iset++;
}
if(key == 3) //UP键
{
disp0++;
}
if(key == 4) //DOWN键
{
disp0--;
}
disp = disp0;
}
else if(iset == 1)
{
if(key == 1) //SET键
{
iset++;
}
if(key == 3) //UP键
{
disp1++;
}
if(key == 4) //DOWN键
{
disp1--;
}
disp = disp1;
}
else if(iset == 2)
{
iset=0;
}
LedBuff[0] = LedChar[disp % 10];
LedBuff[1] = LedChar[disp / 10 % 10];
LedBuff[2] = LedChar[disp / 100 % 10];
}
}

void InterruptTimer0() interrupt 1
{
TH0 = 0xfc;
TL0 = 0x67;

P0 = 0xff;
if(i == 0)
{
baiwei = 1;
shiwei = 1;
gewei = 0;
i++;
P0 = LedBuff[0];
}
else if(i == 1)
{
baiwei = 1;
shiwei = 0;
gewei = 1;
i++;
P0 = LedBuff[1];
}
else if(i == 2)
{
baiwei = 0;
shiwei = 1;
gewei = 1;
i = 0;
P0 = LedBuff[2];
}
}

daiya · 发表于 2015-11-17 23:16:37

有没有更好的程序架构能实现设置参数呢？

talkingbeast · 发表于 2015-11-17 23:26:32

感觉很奇怪的按键设置，不管按不按设置键，按上下按键可以增加和减小显示数字，这个和实际的应用不符合吧。

a136498491 · 发表于 2015-11-17 23:58:02

更好的框架当然是RTOS了，状态机是设计时把任务分解，OS就是轮番调度了，设计时没那么麻烦。

daiya · 发表于 2015-11-20 16:39:09

修改了一下，这样结构比较好！

#include<reg51.h>

unsigned char code LedChar[] = {
0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,
0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e
};
unsigned char LedBuff[4] = {0xff,0xff,0xff,0xff};

sbit gewei = P1^3;
sbit shiwei = P1^2;
sbit baiwei = P1^1;
unsigned char i = 0;

unsigned char iset = 0;

signed int disp = 0;
signed int disp0 = 15;
signed int disp1 = 21;
signed int disp2 = 5;

void delayms(unsigned int k)
{
unsigned int i,j;
for(i=k;i>0;i--)
for(j=110;j>0;j--);
}

unsigned char keyscan(void)
{
unsigned char keynum=0;
unsigned char temp=0;
P3=0xff; //P3口置oxff，准备读取输入值
if(P3!=0xff) //判断是否有键按下
{
delayms(10); //延时10ms消抖动
P3=0xff; //P3口置oxff，准备2次读取输入值
if(P3!=0xff) //2次判断是否有键按下
{
temp=P3; //读取P3口值至temp中
while(P3!=0xff); //按键释放检测语句
switch(temp) //进入开关多分支语句判断
{
case 0xfb:
keynum=1; //SET键
break;
case 0xf7:
keynum=2; //LEFT键
break;
case 0xef:
keynum=3; //UP键
break;
case 0xdf:
keynum=4; //DOWN键
break;
case 0xbf:
keynum=5; //模拟SET键长按
break;
case 0x7f:
keynum=6; //模拟LEFT键长按
break;
default:
break;
}
}
}

return keynum;
}

void main()
{
unsigned long sec = 0;
unsigned char key;

EA = 1;
TMOD = 0x01;
TH0 = 0xfc;
TL0 = 0x67;
ET0 = 1;
TR0 = 1;

while(1)
{
key = keyscan();
if(key == 1) //SET键
{
iset++;
if(iset == 3)
iset=0;
}
else if(key == 3) //UP键
{
if(iset == 1)
{
disp0++;
}
else if(iset == 2)
{
disp1++;
}
}
else if(key == 4) //DOWN键
{
if(iset == 1)
{
disp0--;
}
else if(iset == 2)
{
disp1--;
}
}
if(iset == 0)
{
disp=disp2;
}
else if(iset == 1)
{
disp=disp0;
}
else if(iset == 2)
{
disp=disp1;
}
LedBuff[0] = LedChar[disp % 10];
LedBuff[1] = LedChar[disp / 10 % 10];
LedBuff[2] = LedChar[disp / 100 % 10];
}
}

void InterruptTimer0() interrupt 1
{
TH0 = 0xfc;
TL0 = 0x67;

P0 = 0xff;
if(i == 0)
{
baiwei = 1;
shiwei = 1;
gewei = 0;
i++;
P0 = LedBuff[0];
}
else if(i == 1)
{
baiwei = 1;
shiwei = 0;
gewei = 1;
i++;
P0 = LedBuff[1];
}
else if(i == 2)
{
baiwei = 0;
shiwei = 1;
gewei = 1;
i = 0;
P0 = LedBuff[2];
}
}

请教单片机设置参数的方法

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