單片機與pc串口通信,虛擬端口發(fā)送1接收卻顯示q,發(fā)送2接收顯示r,求大佬幫幫

ID:1140226 · 發(fā)表于 2024-12-17 22:57

#include <REGX51.H>
#define uchar unsigned char
#define uint unsigned int

sbit RS = P2^0;
sbit RW = P2^1;
sbit E = P2^2;

sbit KEY = P3^7;

uchar received_data;

void delayms(uint ms)
{
uchar i;
while (ms--)
      for (i = 0; i < 123; i++);
}

void w_com(uchar com)
{

RS = 0;
RW = 0;
E = 1;
P0 = com;
E = 0;
delayms(1);

}

void w_dat(uchar dat)
{

RS = 1;
RW = 0;
E = 1;
P0 = dat;
E = 0;
delayms(1);
}

void lcd_ini(void)
{
delayms(10);
w_com(0x38);
delayms(10);
w_com(0x0c);
delayms(10);
w_com(0x06);
delayms(10);
w_com(0x01);
delayms(10);
w_com(0x80);
delayms(10);
}

void send_data(uchar data_to_send)
{

SBUF = data_to_send;
while (TI == 0);
TI = 0;
}

void uart_init()
{
// 9600bps 11.0592MHz
SCON = 0x50;
TMOD &= 0x0F;
TMOD |= 0x20;
TL1 = 0xFD;
TH1 = 0xFD;
ET1 = 0;
TR1 = 1;
EA = 1;
ES = 1;
}

void main()
{
uchar data_to_send[8] = "12345678";
uchar i;
lcd_ini();
uart_init();
while (1)
{
      if (KEY == 0)
      {
         delayms(20);
         if (KEY == 0)
         {
            for (i = 0; i < 8; i++)
            {
                  send_data(data_to_send[ i]);
            }
            while (KEY == 0);
         }
      }
}
}

void uart_interrupt() interrupt 4
{
if (RI)
{
      RI = 0;
      received_data = SBUF;

      w_dat(received_data);
}
}