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#include <REG52.H>
#include <absacc.h>
#include <stdio.h>
#define ICM7218 XBYTE[0x00ff]//7218A地址
unsigned char Tab[] ={ 0xFB,0xB0,0xED,0xF5,0xB6,
0xD7,0xDF,0xF0,0xFF,0xF7
};//7218A數(shù)碼管段代碼表
unsigned char Addr[] ={ 0x00,0x08,0x10,0x18,0x20,0x28,0x30,0x38,
0x40,0x48,0x50,0x60,0x68,0x70,0x78
};//ISD1420播放地址代碼表
//(0,1,2,3,4,5,6,7,8,9, 乘以10的,次方,歐,皮法,微亨)
unsigned char P_tab[7] ={ 0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF
};//語音播放結(jié)果列表
unsigned char SaveData[8] ={ 0xCE,0xCE,0xCE,0xCE,0xCE,0xCE,0xCE,0xCE
};//最終結(jié)果
unsigned char count = 0, counter = 0, bai = 0, shi = 0, ge = 0, cifang = 0;
unsigned long int pinlv = 0, result = 0, flag = 0;
sbit Mode = P1^2;//7218A工作模式
sbit R_select = P3^2;//電阻測量選擇按鍵
sbit C_select = P3^3;//電容測量選擇按鍵
sbit L_select = P3^4;//電感測量選擇按鍵
sbit R_led = P2^2;//電阻指示燈
sbit C_led = P2^1;//電容指示燈
sbit L_led = P2^0;//電感指示燈
sbit R_change = P2^4;//電阻量程轉(zhuǎn)變
sbit C_change = P2^3;//電容量程轉(zhuǎn)變
sbit F_B = P1^4;//模擬開關(guān)
sbit F_A = P1^3;
sbit Play = P2^6;//語音播放
sbit Feedback = P2^7;//ISD1420反饋信號]
/****************************
延時(shí)
******************************/
void delay(unsigned int k)
{
unsigned int a;
for(a=0; a<=k; a++);
}
/******************************
頻率測量
*******************************/
void pl(void)
{
TMOD = 0x51;//定時(shí)器0工作方式1，計(jì)數(shù)器1工作方式1
TH0 = 0x3c;
TL0 = 0xb0;//50ms定時(shí)
TH1 = 0;
TL1 = 0;//計(jì)數(shù)器清零
EA = 1;
ET0 = 1;
ET1 = 1;
TR0 = 1;
TR1 = 1;//啟動(dòng)計(jì)時(shí)計(jì)數(shù)器
while(count <= 60);//3秒測頻
count = 0;
pinlv= (counter * 65536 + TH1 * 256 + TL1) / 3;//頻率換算
counter = 0;
TR0 = 0;//停止計(jì)時(shí)計(jì)數(shù)器
TR1 = 0;
}
void t0(void) interrupt 1 using 0//定時(shí)器中斷子程序
{
TH0 = 0x3c;
TL0 = 0xb0;
count++;
}
void t1(void) interrupt 3 using 0//計(jì)數(shù)器中斷子程序
{
counter++;
}
/******************************
阻值公式換算(單位:歐姆)
*******************************/
void R_deal(void)
{
result = (6557705 / pinlv - 200) / 2;//100~10k歐姆
if (R_change == 0)
{
result = (6557705 / pinlv - 20000) / 2;//10k~1M歐姆
}
if (result > 20000 && result < 400000)//修正
{
result = result * 939 / 1000;
}
else
{
result = result * 891 / 1000;
}
}
/*****************************
容值公式換算(單位:PF)
******************************/
void C_deal(void)
{
result = 13383072 / pinlv;//100~1000PF
if (C_change == 0)//1000~10000PF
{
result = 2540851 / pinlv;
}
if (result < 277)//修正
{
result = result * 36 / 100;
}
if (result >= 277 && result < 288)
{
result = result * 430 / 1000;
}
if (result >= 288 && result < 318)
{
result = result * 507 / 1000;
}
if (result >= 318 && result < 450)
{
result = result * 614 / 1000;
}
if (result >= 450 && result < 470)
{
result = result * 65 / 100;
}
if (result >= 470 && result < 1455)
{
result = result * 72 / 100;
}
if (result >= 3295 && result < 9000)
{
result = result * 789 / 1000;
}
}
/******************************
感值公式換算(單位:uH)
******************************/
void L_deal(void)
{
pinlv = pinlv * 100;//頻率分頻還原
result = (6069931 / pinlv) * (6069931 / pinlv);
if (result >= 3600)//修正
{
result = result * 2;
}
if (result >= 2445 && result < 3600)
{
result = result * 100 / 65;
}
if (result >= 1245 && result < 2445)
{
result = result * 100 / 80;
}
if (result >= 552 && result < 1245)
{
result = result * 100 / 70;
}
if (result >= 465 && result < 552)
{
result = result * 100 / 84;
}
if (result >= 328 && result < 465)
{
result = result * 1000 / 765;
}
if (result < 328)
{
result = result * 100 / 79;
}
}
/******************************
轉(zhuǎn)換成代碼表
*****************************/
void daima(void)
{
unsigned char j, i = 0;
flag = result;
while (flag / 10)
{
flag = flag / 10;
i++;
}
if (i >= 2)
{
cifang = i-2;
}
else
cifang = 0;
for (j=0; j<cifang; j++)
{
result = result / 10;
}
bai = result / 100;
shi = result / 10 % 10;
ge = result % 10;
SaveData[0] = Tab[bai];
SaveData[1] = Tab[shi];
SaveData[2] = Tab[ge];
SaveData[3] = Tab[cifang];
}
/******************************
ICM7218_LED顯示
******************************/
void display(void)
{
unsigned char i;
Mode = 1;//寫命令字
ICM7218 = 0xf0;//十六進(jìn)制非譯碼正常工作,后跟顯示數(shù)據(jù)
Mode = 0;//寫入數(shù)據(jù)
for (i=0; i<8; i++)
{
ICM7218 = SaveData[i];
}
}
/*****************************
ISD1420語音播放
******************************/
void play(void)
{
unsigned char i;
P_tab[0] = Addr[bai];//給表賦值
P_tab[1] = Addr[shi];
P_tab[2] = Addr[ge];
P_tab[3] = Addr[10];
P_tab[4] = Addr[cifang];
P_tab[5] = Addr[11];
if (R_led == 0)//電阻--歐
{
P_tab[6] = Addr[12];
}
if (C_led == 0)//電容--皮法
{
P_tab[6] = Addr[13];
}
if (L_led == 0)//電感--微亨
{
P_tab[6] = Addr[14];
}
for (i=0; i<7; i++)
{
P0 = P_tab[i];//地址
delay(20000);
Play = 0;//播放
delay(20000);
while (Feedback == 1);//等待EOM結(jié)束反饋
Play = 1;
delay(20000);
}
}
/*****************************
主函數(shù)
******************************/
void main(void)
{
R_select = 1;//初始化
C_select = 1;
L_select = 1;
R_led = 1;
C_led = 1;
L_led = 1;
Play = 1;
Feedback = 1;
while (1)
{
/*****************電阻*********************/
if (R_select ==0 )//測電阻
{
delay(2000);//去抖動(dòng)
if (R_select == 0)
{
R_led = 0;
C_led = 1;
L_led = 1;
F_B = 0;//模擬開關(guān)電阻頻率輸出
F_A = 0;
delay(20000);
C_change = 1;
R_change = 1;//低量程
delay(50000);
delay(50000);
pl();//測頻
if (pinlv < 164)//是否需要轉(zhuǎn)換(高量程)？
{
R_change = 0;
delay(50000);
delay(50000);
pl();
}
R_deal();//結(jié)果
daima();//代碼轉(zhuǎn)換
display();//顯示
//play();//語音播放
}
}
/******************電容***********************/
if (C_select == 0)//測電容
{
delay(2000);//去抖動(dòng)
if (C_select == 0)
{
C_led = 0;
R_led = 1;
L_led = 1;
F_B = 0;//模擬開關(guān)電容頻率輸出
F_A = 1;
delay(20000);
C_change = 1;//低量程
R_change = 1;
delay(50000);
delay(50000);
……………………
…………限于本文篇幅余下代碼請從51黑下載附件…………

復(fù)制代碼

P13	P14	測量類別
0	0	Y0-R
0	1	Y1-L
1	0	Y2-C
1	1	*

按鍵	二極管	對應(yīng)測試項(xiàng)
KEY1	L1	測試R
KEY2	L2	測試C
KEY3	L3	測試L

輸入數(shù)據(jù)	ID7	ID6	ID5	ID4	ID3	ID2	ID1	ID0
輸出數(shù)據(jù)	D．P	a	b	C	d	e	f	g

INHIBIT	B	A
0	0	0	0x,0y
0	0	1	1x,1y
0	1	0	2x,2y
0	1	1	3x,3y
1	/	/	None

閾值輸入(V11)	觸發(fā)輸入(V12)	復(fù)位(RD)	輸出(VO)	放電管T
/	/	0	0	導(dǎo)通
<2Vcc/3	<Vcc/3	1	1	截止
>2Vcc/3	>Vcc/3	1	0	導(dǎo)通
<2Vcc/3	>Vcc/3	1	不變	不變

進(jìn)制所對應(yīng)十進(jìn)制值碼	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
十六進(jìn)制顯示碼	1	2	3	4	5	6	7	8	9	a	b	c	d	e	f
十進(jìn)制顯示碼	1	2	3	4	5	6	7	8	9	-	E	H	L	P	（空）

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