三星9454,4位一体数码管 动态显示 0-9999 每秒钟计数加1

//********************************

//产品名称: IAR-C编程示例

//使用MCU: S3F9454

//FOSC = 0.5MHZ

//以下示例中很多变量及定义可能并未

//用到,在此仅仅作为示范性列示

//********************************

#include "ioS3C9454.h"//

#include "intrinsics.h"//包含内部函数

//************************************************

//**此处为宏定义替换******

//平台相关 

#define SET_BIT(port, bit) (port = port | (0x1 << bit))

#define CLR_BIT(port, bit) (port = port & ~(0x1 << bit))

#define TEST_BIT(port, bit) (port & (0x1 << bit))

#define COM_BIT(port,bit) (port = port ^ (0x1 << bit))

#define NOP (__no_operation()) // 将后者指令行缩写为nop;

#define DI (__disable_interrupt()) //将后者指令行缩写为di;

#define EI (__enable_interrupt()) //将后者指令行缩写为ei;

//部分通用宏操作定义

#define Clr_WatchDog (BTCON |= 0x02) //喂狗

//************************************************

//**此处定义程序所用到的全局变量*******

unsigned char RUNFLAG = 0;

unsigned char DISPFLAG = 0;

unsigned char ERRFLAG = 0; //错误代码标志寄存器

unsigned char KEY_CODE = 0; //键扫描码

unsigned char table[10] ={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90}; //数码管

unsigned char tab_bit[4] = {0x1,0x2,0x4,0x8}; //p2.0-P2.3

unsigned int count;

unsigned char tp[4];

unsigned char num;



//*************************************************************************

//位操作寄存器定义



//*************************************************************************

//***程序所用函数声明*****

//***凡程序中所用到的函数请先在这里声明***

__interrupt void int_9454();

//*************************************************************************

//*************************************************************************

//**定义9454的SMART OPTION值****

//**003CH,must be initialized to 0

//**003DH,must be initialized to 0

//**003EH,enable LVR(2.3V)

//**003FH,internal RC(0.5MHZ in Vdd=5V)

//*************************************

__code const volatile unsigned char SmartOption[4] @0x003c = {0x0,0x0,0xe7,0x02};

//*************************************************************************

//*************************************************************************



**********************************************************

void Delay5ms(void) //延时函数

{

unsigned int i;

for(i=50;i>0;i--)

{

Clr_WatchDog;

NOP;

NOP;

NOP;

NOP;

NOP;

NOP;

NOP;

NOP;

NOP;

NOP;

}

}



void LedScan(unsigned char num,unsigned char wei)

{

//这里是LED显示动态扫描过程

P2=0x0;

P0=table[num]; //段码

P2=tab_bit[wei]; //位

Delay5ms(); //延时

P2=0x0; //关闭显示



}



//========================主程序控制===========================

void main(void)

{

unsigned char buffer = SmartOption[0];





BTCON= 0xA2;

CLKCON=0x98; 



P0PND = 0x00;

//P0CONH=0x9a;//

P0CONH = 0xAA; //推挽输出

P0CONL = 0xAA; //推挽输出

P0 = 0x0;



P1CON = 0xCA; 

P1 = 0x0; 



P2CONH = 0x4A; 

P2CONL = 0xAA; 

P2=0x0;



PWMDATA = 0x80; 

PWMCON = 0x10; //FOSC/64

//PWMCON = 0x4; 



T0DATA = 0x7A; //1s 

T0CON = 0x0A; //fosc/4096



EI;



while(1)

{

unsigned char i;

for(i=0;i<4;++i)

{

LedScan(tp,i); //显示



}





}

}

//******************************************************************

#pragma vector=0x00

__interrupt void int_9454()

{

T0CON = T0CON & 0xFE; //必须清T0中断标志

T0DATA=0x7A;

T0CON=0xA;

count++; //1s来一次中断

if(count>9999)

{

count=0;

}

tp[3]=count/1000; //千位

tp[2]=count%1000/100; //百位

tp[1]=count%100/10; //十位

tp[0]=count%10; //个位



}

//*************************************************************************