单片机与pc串口通信,虚拟端口发送1接收却显示q,发送2接收显示r,求大佬帮帮

ID:1140226 · 发表于 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);
}
}

ID:860926 · 发表于 2024-12-18 08:27

发送的字符 +0x30 试试

ID:294886 · 发表于 2024-12-18 09:28

两边的格式不一样吧，都设置成16进制看看

ID:275826 · 发表于 2024-12-18 15:34

单片机与虚拟终端是同一个设备

ID:161164 · 发表于 2024-12-19 11:50

检查一下单片机晶振设置，如果也是11.0592Mhz
那就可能是电脑太慢引致仿真速度不匹配现实

ID:30165 · 发表于 2024-12-28 17:26

ASCII码 0 的ASCII码是 0X30 你发送 1 实际发送（1+0x30)试试

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