time2.c

该程序为C8051F单片机的程序

#include <c8051F320.h>
#define uchar unsigned char
#define uint unsigned int

#define SYSCLK 24000000
#define uart_rate 19200
#define C_TMR1 -((SYSCLK/48)/2)/uart_rate

#define T3_VAL -(SYSCLK/12/1000)*20

sbit BEEP = P3^0;
sbit LED_SEL = P1^7;

void SYSCLK_Init (void);
void ENA_WDT(void);
void Port_Init(void);
void Timer1_Init(void);
void Uart0_Init(void);
void transmitte (void);
//void checktime (void);


void Timer3_Init(void);
void check_time (void);
uchar data second_count = 50;

//uchar code seg[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x67};
uchar code trdata1[]={"学号 = 05281060 05281084 \n日期 = 2007年12月23日\r\n\r\n\0"};
//uchar data time[]={"asas"}

uchar code *data point;
//uchar data *data point2;
uchar data i,j;
uint data k,l;
bit	TRANS_NEXT_BYTE_OK,tr_en;


void main(void) 
{
	ENA_WDT();
	SYSCLK_Init ();
	Uart0_Init();
	Port_Init();
	Timer1_Init ();
    Timer3_Init();
    PCA0CPH4=0;
	
	point = trdata1;
 //  point2=time;
	ES0 = 1;

	TI0 = 1;
	EA = 1;

	while (1)
	{
		if (TRANS_NEXT_BYTE_OK) transmitte ();
		if ((TMR3CN&0x80) == 0x80) check_time ();
		if ((*point == '\0')&&tr_en)
		{
			tr_en = 0;
			point = trdata1;
			   //point2=time;
			TI0 = 1;

		}
		PCA0CPH4 = 0;
	}
}

void SYSCLK_Init (void)
{
	uchar data i;
	CLKMUL |= 0x80;
	for (i=0;i<20;i++);
	CLKMUL |= 0xc0;
	while ((CLKMUL&0x20)==0);	//无法软件仿真
	CLKSEL |= 0x02;
}

void Port_Init(void)
{  
	XBR0 = 0x01;				//uart的tx,rx分配至p0.4及p0.5 
	P0MDOUT |= 0x10;			//uart的tx为推挽输出 
	XBR1 = 0x40;				//使能交叉矩阵，弱上拉 
								//关闭音响和LED，对应新实验板，与仿真无关
	BEEP = 0;
	P2 = 0;
	LED_SEL = 0;
	LED_SEL = 1;
	LED_SEL = 0;
	LED_SEL = 1;
}

void ENA_WDT(void)
{
	PCA0MD &= ~0x40;
	PCA0MD &= 0xb1;
	PCA0CPL4 = 255;
	//PCA0MD |= 0x40;				//无法软件仿真
	PCA0CPH4=0;
}

void Timer1_Init(void)
{   
	CKCON |= 0x02;				//定时器1和2的触发时钟为 sysclk/48 = 0.5MHZ
	CKCON &= ~0x08;
	TMOD |= 0x20;				//定时器1为模式2,8位自动重装
	TMOD &= ~0x10;
	TH1 = C_TMR1;				//设置定时器1的重装值，-13，即0xf3
	TL1 = C_TMR1;
	TR1 = 1;					//启动定时器1
}

void Uart0_Init(void)
{
	SCON0 = 0xD0;				//9位数据，允许接收
								//偶校验由软件实现
	ES0 = 1;					//允许UART中断
}

void Uart0_ISR(void) interrupt 4
{
	if (RI0)
	{
		RI0 = 0;
	}
	if (TI0)
	{
		TI0 = 0;
		TRANS_NEXT_BYTE_OK = 1;
	}
}

void transmitte (void)
{
	TRANS_NEXT_BYTE_OK = 0;	
	if (*point != '\0')
	{
		ACC = *point;
		TB80 = P;
		SBUF0 = ACC;
		point++;
	}
	/*	if (*point2 != '\0')
	{
		ACC = *point2;
		TB80 = P;
		SBUF0 = ACC;
		point2++;
	}*/
}

void Timer3_Init()
{
	TMR3L=T3_VAL;
	TMR3H=T3_VAL>>8;
	TMR3RLL=T3_VAL;
	TMR3RLH=T3_VAL>>8;
	TMR3CN=0x04;
}
/*
void checktime (void)
{
	TMR3CN &= 0x7f;
	if(second_count != 0) second_count--;
	else
	{
		second_count = 50;
		RING = 1;
		if(second<0x59)
		{
			second++;
			second = da_adjust(second);
			ring_tmr = 5;
		}
		else
		{
			second=0;
			if(minute<0x59)
			{
				minute++;
				minute=da_adjust(minute);
				ring_tmr = 25;
			}
			else
			{
				minute=0;
				ring_tmr=50;
				if(hour<0x23)
				{
					hour++;
					hour=da_adjust(hour);
				}
				else hour=0;
			}
		}
	}
	if(ring_tmr != 0)
	{
		ring_tmr--;
		if(ring_tmr == 0) RING = 0;
	}
	tmr3_done=0;
} */

void check_time (void)
{
	TMR3CN &= 0x7f;
	if(second_count != 0) second_count--;
	else
 	{
		second_count = 50;
		tr_en = 1;
	
	}
}