请问如何用一节3伏纽扣电池给8051供电？

#include"sn8p_init_sys.h"





void init_sys(void);



void init_sys(void)

{

unsigned char i,j;



beep_lock = false;

BEEPM = 1;

seg1_m = 1;

seg2_m= 1;

seg3_m =1;

seg4_m =1;

seg5_m =1;



Mode.OptMode = 0x00;

Mode.Number = 0x03;//上电先跑第三



FP54M=1;



TC0M = 0x54; //TC0M register value, Fcpu: 4.000000MHZ//CLK source: Fcpu

TC0C = 0x4C; //TC0C register value, time: 360.000000us(2777.777778HZ)

TC0R = 0x4C; //TC0R register value

FTC0IRQ = 0;

FTC0IEN = 1; //TC0 Interrupt enable

FTC0ENB = 1; //TC0 enable



T0M = 0x70; //T0M register value, Fcpu: 4.000000MHZ//CLK source: Fcpu

T0C = 0x9C; //T0C register value, time: 50.000000us

FT0IRQ = 0;

FT0IEN = 1; //T0 Interrupt enable

FT0ENB = 1; //T0 enable





FGIE= 1;



}

#include"sn8p_bias_lcd_driver.h"



//定义22幅画面

__ROM unsigned char 



//SetMode

seg_code_1[4] = {0x40,0x20,0x68,0x20},//flash_1 

seg_code_2[4] = {0x80,0xE0,0x60,0xA8},//flash_2

seg_code_3[4] = {0xC0,0x60,0x60,0x60},//flash_3 



seg_code_4[4] = {0x00,0x20,0x20,0x20},//flash_none 0000 0000,0010 0000,0010 0000,0010 0000

//RunMode



seg_code_1r[28] =

{

0x40,0x20,0x68,0x20,

0x40,0x28,0x68,0x20,

0x48,0x28,0x68,0x20,

0x58,0x28,0x68,0x20,

0x58,0x38,0x68,0x20,

0x58,0x38,0x78,0x20,

0x58,0x38,0x78,0x30,

},

seg_code_2r[28] =

{

0x80,0xE0,0x60,0xA8,

0x80,0xE8,0x60,0xA8,

0x88,0xE8,0x60,0xA8,

0x98,0xE8,0x60,0xA8,

0x98,0xF8,0x60,0xA8,

0x98,0xF8,0x70,0xA8,

0x98,0xF8,0x70,0xB8,

},

seg_code_3r[28] = 

{

0xC0,0x60,0x60,0xE0,

0xC0,0x68,0x60,0xE0,

0xC8,0x68,0x60,0xE0,

0xD8,0x68,0x60,0xE0,

0xD8,0x78,0x60,0xE0,

0xD8,0x78,0x70,0xE0,

0xD8,0x78,0x70,0xF0,

}

;





void dispp(unsigned char *pCode);





static void select_seg(unsigned char seg_x);



static void select_seg(unsigned char seg_x)

{

seg1 =(seg_x&0x80)>0x00?1:0;

seg2 =(seg_x&0x40)>0x00?1:0;

seg3 =(seg_x&0x20)>0x00?1:0;

seg4 =(seg_x&0x10)>0x00?1:0;

seg5 =(seg_x&0x08)>0x00?1:0;

}



void dispp(unsigned char *pCode)

{

static unsigned char ScanCount=0;



switch(ScanCount) //动态扫描显示

{ 

case 0: //com1正向驱动





select_seg(*pCode); 

com1 = 0; 

com1_m = 1;

com2_m = 0;

com3_m = 0;

com4_m = 0; //除com1输出外，其余com设为输入



break;



case 1: //com1反向驱动



select_seg(~*pCode); 

com1 = 1;



break;





case 2: //com2正向驱动



select_seg(*(pCode+1));

com2 = 0; 

com1_m = 0;

com2_m = 1;

com3_m = 0;

com4_m = 0; 



break;



case 3: //com2反向驱动

select_seg(~*(pCode+1));

com2 = 1; 



break;





case 4: //com3正向驱动



select_seg(*(pCode+2));

com3 = 0; 

com1_m = 0;

com2_m = 0;

com3_m = 1;

com4_m = 0; 



break;



case 5: //com3反向驱动



select_seg(~*(pCode+2));

com3 = 1;



break;



case 6: //com4正向驱动



select_seg(*(pCode+3)); 

com4 = 0; 

com1_m = 0;

com2_m = 0;

com3_m = 0;

com4_m = 1; 





break;



case 7: //com4反向驱动



select_seg(~*(pCode+3));//1111 1111

com4 = 1;

com1_m = 0;

com2_m = 0;

com3_m = 0;

com4_m = 1; 







break;



default:



break;







}



ScanCount++;



if(ScanCount>=8)

{

ScanCount=0;

}

}