text1.c

单片机快速入门原程序

#include <reg51.h>
#include<stdio.h>
Uart_Init();
sbit P10=0x90;
sbit P11=0x91;
sbit P12=0x92;
sbit P13=0x93;
sbit P14=0x94;
sbit P15=0x95;
sbit P16=0x96;
sbit P17=0x97;
main()
{ 
	Uart_Init();
	while(1)
	{
	if(P10==0)
		printf("key NO. 0 down\n");
	if(P11==0)
		printf("key NO. 1 down\n");
	if(P12==0)
		printf("key NO. 2 down\n");
	if(P13==0)
		printf("key NO. 3 down\n");
	if(P14==0)
		printf("key NO. 4 down\n");
	if(P15==0)
		printf("key NO. 5 down\n");
	if(P16==0)
		printf("key NO. 6 down\n");
	if(P17==0)
		printf("key NO. 7 down\n");

	}
}


Uart_Init()
	{SCON = 0x52;    /* 设置串行口控制寄存器SCON*/
	 TMOD = 0x20;    /* 12M时钟时波特率为2400  */
	 TCON = 0x69;    /* TCON */
	 TH1 =  0xf3;    /* TH1 */
	}