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#include

#include //需要用到_nop_()函数

#define uchar unsigned char

#define uint unsigned int

sbit dula = P2 ^ 6; //申明U1锁存器的锁存端

sbit wela = P2 ^ 7; //申明U2锁存器的锁存端

sbit adwr = P3 ^ 6; //申明AD的WR端口

sbit adrd = P3 ^ 7; //申明AD的RD端口

uint g_iNum; //申明变量获取AD转换后的数字量

uchar g_cT0; //申明变量便于定时器0计数

uchar g_cFlag; //申明变量实现AD转换函数与主函数间的通信

uchar code table[] = { //数码管的编码定义(0,1,...,9,A,B,C,D,E,F)

0x3f,0x06,0x5b,0x4f,

0x66,0x6d,0x7d,0x07,

0x7f,0x6f,0x77,0x7c,

0x39,0x5e,0x79,0x71

};

void serial_com(uint i_num); //申明串口数据送计算机的函数

void delayms(uint xms); //申明延时xms ms函数

void tude_display(uint i_num); //申明数码管显示函数

void init(); //申明串口,中断,定时器0初始化函数

void main()

{

uchar i;

//串口, 中断, 定时器初始化

init();

//主循环(反复执行)

while (1)

{

if (g_cFlag == 1) //检测AD是否发生

{

for (i = 100; i > 0; i--)

tude_display(g_iNum); //将ad转换的数字量显示在数码管

serial_com(g_iNum); //将ad转换数字量对应的模拟量发送到计算机

}

}

}

//延时ms函数

void delayms(uint xms)

{

uint i, j;

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

for (j = 110; j > 0; j--)

;

}

//数码管显示函数

void tude_display(uint i_num)

{

uchar bai, shi, ge;

bai = i_num / 100;

shi = i_num % 100 / 10;

ge = i_num % 10;

dula = 1;

P0 = table[bai];

dula = 0;

//P0 = 0xff; //ADC0804的CS端连接在U2锁存器的Q7上,所以Q7位需要为0, 所以不能做清影动作

wela = 1;

P0 = 0x7e; //ADC0804的CS端连接在U2锁存器的Q7上,所以Q7位需要为0, 下同

wela = 0;

delayms(5);

dula = 1;

P0 = table[shi];

dula = 0;

//P0 = 0xff;

wela = 1;

P0 = 0x7d;

wela = 0;

delayms(5);

dula = 1;

P0 = table[ge];

dula = 0;

//P0 = 0xff;

wela = 1;

P0 = 0x7b;

wela = 0;

delayms(5);

//每次显示数据后将数码管全灭

}

void T0_timer() interrupt 1

{

TH0 = (65536 - 50000) / 256;

TL0 = (65536 - 50000) % 256;

g_cT0++;

if (g_cT0 == 20)

{

g_cT0 = 0;

adwr = 1;

_nop_();

adwr = 0;

_nop_();

adwr = 1;

P1 = 0xff;

adrd = 1;

_nop_();

adrd = 0;

_nop_();

g_iNum = P1; //获取Ad转换的数字量

g_cFlag = 1; //标志位置位, AD与主函数间通信

}

}

void init()

{

//选通AD的CS端, ADC0804的CS端与U2锁存器的Q7端连接

wela = 1;

P0 = 0x7f;

wela = 0;

//串口工作方式

SM0 = 0;

SM1 = 1;

TMOD = 0x21;

//波特率为1200bsp

TH1 = 0xE8;

TL1 = 0xE8;

//启动定时器1

TR1 = 1;

//开启总中断

EA = 1;

//开启定时器0中断

ET0 = 1;

//启动定时器0

TR0 = 1;

}

void serial_com(uint i_num)

{

long temp;

uchar sCom[7];

uchar i;

//将AD转换的数字量转化为对于的模拟量

temp = (i_num * 500000) / 256;

sCom[0] = temp / 100000;

sCom[1] = .;

sCom[2] = temp / 1000 % 10;

sCom[3] = temp / 1000 % 10;

sCom[4] = temp / 100 % 10;

sCom[5] = temp / 10 % 10;

sCom[6] = temp % 10;

//发送三个空格

for (i = 0; i < 3; i++)

{

SBUF = 0x20; //0x20为空格的ascii码

while (!TI);

TI = 0;

}

//将AD数字量对于模拟量发送到计算机

for (i = 0; i < 7; i++)

{

if (i != 1)

SBUF = sCom[i] + 0x30; //0x30为0的ascii码

else

SBUF = sCom[i]; //.不需要加0的ascii码

while (!TI);

TI = 0;

}

}