直流电机转速测量与控制程序

直流电机转速测量与控制程序

#include "reg51.h"

#include "absacc.h"

#define LEDLen 6

#define Tick 10 // 10 x 100us = 1ms

unsigned int C100us; // 100us记数单元

xdata unsigned char CS0832 _at_ 0xb000;

xdata unsigned char OUTBIT _at_ 0x8002; // 位控制口xdata unsigned char OUTSEG _at_ 0x8004; // 段控制口xdata unsigned char IN _at_ 0x8001; // 键盘读入口

unsigned char LEDBuf[LEDLen]; // 显示缓冲

code unsigned char LEDMAP[] = { // 八段管显示码

0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07,

0x7f, 0x6f, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71

};

code unsigned char KeyTable[] = { // 键码定义

0x16, 0x15, 0x14, 0xff,

0x13, 0x12, 0x11, 0x10,

0x0d, 0x0c, 0x0b, 0x0a,

0x0e, 0x03, 0x06, 0x09,

0x0f, 0x02, 0x05, 0x08,

0x00, 0x01, 0x04, 0x07

};

long int n;

unsigned char flag;

unsigned char DA;

unsigned char Key_temp;

unsigned char k_TEMP[2];

void time1_int(void);

void delay(unsigned char CNT)

{

unsigned char i;

while (CNT-- !=0)

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

}

unsigned char TestKey()

{

OUTBIT = 0; // 输出线置为0

return (~IN & 0x0f); // 读入键状态(高四位不用) }

unsigned char GetKey()

{

unsigned char Pos;

unsigned char i;

unsigned char k;

i = 6;

Pos = 0x20; // 找出键所在列

do {

OUTBIT = ~ Pos;

Pos >>= 1;

k = ~IN & 0x0f;

} while ((--i != 0) && (k == 0));

// 键值= 列x 4 + 行

if (k != 0) {

i *= 4;

if (k & 2)

i += 1;

else if (k & 4)

i += 2;

else if (k & 8)

i += 3;

OUTBIT = 0;

do delay(10); while (TestKey()); // 等键释放

return(KeyTable[i]); // 取出键码

} else return(0xff);

}

void DisplayLED()

{

unsigned char i;

unsigned char Pos;

unsigned char LED;

Pos = 0x20; // 从左边开始显示for (i = 0; i < LEDLen; i++) {

OUTBIT = 0; // 关所有八段管LED = LEDBuf[i];

OUTSEG = LED;

OUTBIT = Pos; // 显示一位八段管delay(5);

Pos >>= 1; // 显示下一位

}

OUTBIT = 0; // 关所有八段管}

void time1_int(void) interrupt 3

{

C100us--;

if (C100us == 0)

{

C100us = Tick;

TR0 = 0;

TR1 = 0;

n=TH0*256+TL0;

TH0 = 0;

TL0 = 0;

TH1 = 255 - 50;

TL1 = 255 - 50;

flag = 1;

TR0 = 1;

TR1 = 1;

}

}

void main()

{

unsigned char i = 0;

//TMOD = 0X05; // T0计数方式C100us = Tick;

n = 0;

TMOD = 0X15;

TH0 = 0;

TL0 = 0;

TH1 = 255 - 50; // 定时100US

TL1 = 255 - 50;

ET1 = 1; // 开中断

EA = 1;

while(1){

if (TestKey())

{

Key_temp = GetKey() & 0x0f ;

LEDBuf[i] = LEDMAP[Key_temp];

k_TEMP[i] = Key_temp;

i++;

if(i==2)

{

i = 0;

break;

}

}

}

Key_temp = k_TEMP[0]*10+k_TEMP[1];

DA = 0x2f;

CS0832 = DA;

TR0 = 1;

TR1 = 1;

while(1){

while(flag)

{