#define TM              (65536 -(MAIN_Fosc/Baudrate/4))
#define Timer0_Reload   (65536UL -(MAIN_Fosc / 1000))       //Timer 0 中断频率, 1000次/秒
#define Baudrate        115200UL

void UartInit(void)
{
    
    
	P_SW1 = (P_SW1 & 0x3f) | 0x00;    //USART1 switch to, 0x00: P3.0 P3.1, 0x40: P3.6 P3.7, 0x80: P1.6 P1.7, 0xC0: P4.3 P4.4
	SCON = (SCON & 0x3f) | 0x40; 
	T1x12 = 1;          //定时器时钟1T模式
	S1BRT = 0;          //串口1选择定时器1为波特率发生器
	TL1 = TM;
	TH1 = TM>>8;
	TR1 = 1;			//定时器1开始计时
}

void UartPutc(unsigned char dat)
{
    
    
	SBUF = dat; 
	while(TI==0);
	TI = 0;
}

char putchar(char c)
{
    
    
	UartPutc(c);
	return c;
}