如下程序我想实现串口发不同的字符后,单片机P0口高电平驱动三极管工作。但是发现没有办法动作!求助!!!
#include <reg51.h>
#include <string.h>
#define INBUF_LEN 4 //数据长度
unsigned char inbuf1[INBUF_LEN];
unsigned char checksum,count3;
bit read_flag= 0;
sbit keypad1=P0^0;
sbit keypad2=P0^1;
sbit keypad3=P0^2;
sbit keypad4=P0^3;
sbit keypad5=P0^4;
sbit keypad6=P0^5;
void delay_ms(unsigned int ms)
{
unsigned int i;
unsigned char j;
for(i=0;i<ms;i++)
{
for(j=0;j<200;j++);
for(j=0;j<102;j++);
}
}
void init_serialcomm( void )
{
SCON = 0x50 ; //SCON: serail mode 1, 8-bit UART, enable ucvr
TMOD |= 0x20 ; //TMOD: timer 1, mode 2, 8-bit reload
PCON |= 0x80 ; //SMOD=1;
TH1 = 0xF4 ; //Baud:4800 fosc=11.0592MHz
IE |= 0x90 ; //Enable Serial Interrupt
TR1 = 1 ; // timer 1 run
//TI=1;
}
//向串口发送一个字符
void send_char_com(unsigned char ch)
{
SBUF=ch;
while (TI== 0 );
TI= 0 ;
}
//向串口发送一个字符串,strlen为该字符串长度
void send_string_com( unsigned char *str, unsigned int strlen)
{
unsigned int k= 0 ;
do
{
send_char_com(*(str + k));
k++;
}
while (k < strlen);
}
//串口接收中断函数
void serial () interrupt 4 using 3
{
if (RI)
{
unsigned char ch;
RI = 0 ;
ch=SBUF;
if (ch> 127 )
{
count3= 0 ;
inbuf1[count3]=ch;
checksum= ch- 128 ;
}
else
{
count3++;
inbuf1[count3]=ch;
checksum ^= ch;
if ( (count3==(INBUF_LEN- 1 )) && (!checksum) )
{
read_flag= 1 ; //如果串口接收的数据达到INBUF_LEN个,且校验没错,就置位取数标志
}
}
}
}
void main(void)
{
unsigned char relay;
relay='A';
P0=0x00;
init_serialcomm(); //初始化串口
while ( 1 )
{
if (read_flag) //如果取数标志已置位,就将读到的数从串口发出
{
read_flag= 0 ; //取数标志清0
//send_string_com(inbuf1,INBUF_LEN);
send_char_com(relay);
switch(relay)
{
case 'B':
delay_ms(500);
keypad1=1;//气缸1 Close
delay_ms(2500);
keypad2=1;//气缸2 Close
break;
case 'C':
delay_ms(500);
keypad3=1;//气缸3 Close
delay_ms(1000);
keypad3=0;//气缸3 Open
break;
case 'D':
delay_ms(500);
keypad1=0;//气缸1 Open
keypad2=0;//气缸1 Open
break;
case 'E':
delay_ms(500);
keypad4=1;//气缸4 Close
delay_ms(2500);
keypad5=1;//气缸5 Close
break;
case 'F':
delay_ms(500);
keypad6=1;//气缸6 Close
delay_ms(1000);
keypad6=0;//气缸6 Open
break;
case 'G':
delay_ms(500);
keypad4=0;//气缸4 Open
keypad5=0;//气缸5 Open
break;
default:
P0=0x00;
break;
}
}
}
}
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