我調的小車前進后退左轉右轉的簡單代碼新手開始做小車，請多多指教

ID:123772 · 發表于 2016-5-29 01:35

這是我調的小車前進后退左轉右轉的簡單代碼。

#include"reg52.h"
#define key_vaule1 1
#define key_vaule2 2
#define key_vaule3 3
#define key_vaule4 4
sbit key1=P3^2;
sbit key2=P3^4;
sbit key3=P3^6;
sbit key4=P3^7;
sbit IA1=P0^0;
sbit IB1=P0^1;
sbit IA2=P0^2;
sbit IB2=P0^3;
int ms_10=0;
int keypress = 0;
//按鍵抬起的任務執行函數
void HandleKeyPress()
{
switch(keypress)
{
case key_vaule1:
IA1=1;IB1=0;
IA2=1;IB2=0;
break;
case key_vaule2:
IA1=0;IB1=1;
IA2=0;IB2=1;
break;
case key_vaule3:
IA1=1;IB1=0;
IA2=0;IB2=0;
break;
case key_vaule4:
IA1=0;IB1=0;
IA2=1;IB2=0;
break;
}
}
void keyScan()
{
static unsigned char state=0;
unsigned char temp;
if(key1==0) temp=key_vaule1;
else if (key2==0) temp=key_vaule2;
else if (key3==0) temp=key_vaule3;
else if (key4==0) temp=key_vaule4;
else temp=0;
switch (state)
{
case 0: if(temp!=0) state=1;break; //檢測是否有低電平出現
case 1: state=2; break; //延時10ms
//case 2：按鍵已經被按下，此時把temp的數值付給keypress就可以知道是那個按鍵被按下
case 2: if(temp!=0) {state=3;keypress=temp;HandleKeyPress();} else state=0; break;
case 3: if(temp==0) {state=0;IA1=0;IB1=0;IA2=0;IB2=0;} break;
}
}
void main()
{
TMOD = 0x01;
TH0 = (65536-1000)/256;
TL0 = (65536-1000)%256;
EA = 1;
ET0 = 1;
TR0 = 1;
while(1)
{
if(ms_10>10)
{
ms_10 = 0;
keyScan();
}
}
}
void timer0() interrupt 1
{
TH0 = (65536-1000)/256;
TL0 = (65536-1000)%256;
ms_10++;
}

復制代碼

ID:638391 · 發表于 2019-11-10 13:18

樓主這里的按鍵是什么模塊啊

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