Question

单片机每隔1s向PC传输一次“aaaaa"，用C语言怎么实现，求程序及注解。哪位大神帮帮忙~

Answer 1

#include <reg52.h>
#define uint unsigned int
#define uchar unsigned char
void Delay(uint x)
{
uchar i;
while(x--)
{
for(i=0;i<120;i++);
}
}

void putc_to_SerialPort(uchar c)
{
SBUF = c;
while(TI == 0);
TI = 0;
}
void puts_to_SerialPort(uchar *s)
{
while(*s != '\0')
{
putc_to_SerialPort(*s);
s++;
Delay(5);
}
}
void main()
{
uchar c = 0;
SCON = 0x40;
TMOD = 0x20;
PCON = 0x00;
TH1 = 0xfd;
TL1 = 0xfd;
TI = 0;
TR1 = 1;
Delay(200);
while(1)
{
puts_to_SerialPort("aaaaa\r\n");
Delay(1000);
}
}

追问

请问在上述情况下，如果pc向单片机发送‘T’时单片机开始发送aaaaa，发送‘F’时单片机结束发送aaaaa，该怎么编呢？