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為什么電機驅(qū)動模塊l298n中 4條信號線（int1 2 3 4）的其中一條接單片機的任一引腳，電機都會轉(zhuǎn)，且方向不同（每個電機兩條信號線，一個左輪子一個右輪子），但兩條信號線同時接單片機，無論手機藍牙（HC06）怎么遙控電機都不動，都不動。。。 還有我想問問l298n與單片機共地是怎樣的？ 大神們幫我看看程序好嗎？（程序是4輪小車的，而我只做2輪的）
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit QOA1=P1^0;
sbit QOB1=P1^1;
sbit QOA2=P1^2;
sbit QOB2=P1^3;
sbit HOA1=P2^0;
sbit HOB1=P2^1;
sbit HOA2=P2^2;
sbit HOB2=P2^3;
uchar a;
void qianjin()
{QOA1=1;
QOB1=0;
QOA2=1;
QOB2=0;
HOA1=1;
HOB1=0;
HOA2=1;
HOB2=0;
}
void houtui()
{QOB1=1;
QOA2=0;
QOB2=1;
HOA1=0;
HOB1=1;
HOA2=0;
HOB2=1;}
void zuozhuan()
{QOA1=1;
QOB1=0;
QOA2=0;
QOB2=0;
HOA1=1;
HOB1=0;
HOA2=0;
HOB2=0;
}
void youzhuan()
{QOA1=0;
QOB1=0;
QOA2=1;
QOB2=0;
HOA1=0;
HOB1=0;
HOA2=1;
HOB2=0;
}
void ting()
{QOA1=0;
QOB1=0;
QOB2=0;
HOB1=0;
HOA2=0;
HOB2=0;}
void con()interrupt 4
{EA=0;
a=SBUF;
RI=0;
EA=1;}
void main()
{
TMOD=0x20;
PCON=0x00;
SCON=0x50;
TH1=0xfd;
TL1=0xfd;
TR1=1;
ES=1;
EA=1;
while(1)
{switch(a)
{case 'A':qianjin();break;
case 'B':houtui();break;
case 'C':zuozhuan();break;
case 'D':youzhuan();break;
default:ting();break;}}}
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