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#include "STC8H.H"
#include "intrins.h"
/*宏定義*/
#define uint unsigned int
#define uchar unsigned char
#define ulong unsigned long
#define TOL 900 //公差
#define VCC 5000 //電壓常量(毫伏)
#define VCR 5100 //阻值常量
#define LIM 4000 //開路電壓閾值常量(毫伏)
/*端口定義*/
sbit ADKA=P1^0; //測阻1
sbit ADKB=P1^1; //測阻2
sbit ADCA=P1^4; //ADC1
sbit ADCB=P1^5; //ADC2
sbit ADCO=P1^6; //ADC4
sbit LEDG=P5^0; //綠燈
sbit LEDR=P5^1; //紅燈
sbit HC595_SER = P0^0; //數據
sbit HC595_SRCLK = P0^1; //移位時鐘
sbit HC595_RCLK = P0^2; //鎖存
uchar code table[]={ //共陰數碼管段碼標準字庫
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71,
// black - H J K L N o P U t G Q r M y
0x00,0x40,0x76,0x1E,0x70,0x38,0x37,0x5C,0x73,0x3E,0x78,0x3d,0x67,0x50,0x37,0x6e,
// 0. 1. 2. 3. 4. 5. 6. 7. 8. 9. -1
0xBF,0x86,0xDB,0xCF,0xE6,0xED,0xFD,0x87,0xFF,0xEF,0x46};
uchar data dis_buf[4]={~0x3F,~0x3F,~0x3F,~0x3F};//顯示緩存
/*全局變量*/
uint VinA; //測電壓A
uint VinB; //測電壓B
uint RinD; //測電阻
uint VADC; //ADC轉換結果
uint vector; //向量
bit flag=0; //標志
bit flag1=0; //
bit allow; //允許
uint count; //計數
uint count1;
uint count2;
uint VR;
/*本地子函數*/
void Delay500us(void); //延時函數
void Delay_ms(uint t); //延時函數
void Timer0_Init(void); //初始化定時器0
void ADC_Init(void); //初始化ADC
uint ADC_Read(uchar ch); //讀取ADC結果
uint ADC_R(uchar dat); //換算ADC電阻
uint ADC_V(uchar dat); //換算ADC電壓
uint exist_VR(uchar dat); //測量VR存在
void symmetry_VR(void); //測量VR電阻程序
void Send_595(uchar dat); //595發送一個字節
void DisplayScan(); //595多字節驅動數碼管靜態顯示
void Renewal(); //數碼管緩存更新
//主函數
void main()
{
uchar RH,RL;
//初始化端口模式配置
P0M0 = 0x00;P0M1 = 0x00; //全部為準雙向口
P1M0 = 0x00;P1M1 = 0xfb; //除P1.2NC外全部高阻
P2M0 = 0x00;P2M1 = 0x00; //全部為準雙向口
P3M0 = 0x00;P3M1 = 0x00; //全部為準雙向口
P4M0 = 0x00;P4M1 = 0x00; //全部為準雙向口
P5M0 = 0x00;P5M1 = 0x00; //全部為準雙向口
P6M0 = 0x00;P6M1 = 0x00; //全部為準雙向口
P7M0 = 0x00;P7M1 = 0x00; //全部為準雙向口
Delay_ms(100);
ADC_Init(); //初始化ADC
while(1)
{
symmetry_VR(); //測量VR電阻
dis_buf[0]=~(table[20]); //卜表示K
dis_buf[1]=~(table[RinD/10%10]);
dis_buf[2]=~(table[RinD/100%10]|0x80);//加小數點
dis_buf[3]=~(table[RinD/1000%10]);
DisplayScan(); //顯示阻值
if(RinD<(1250-225) || RinD>(1250+225))//12.5K+/-18% 阻值超過誤差或沒有裝VR
{
LEDG=1; //綠燈熄
//LEDR=0; //紅燈亮有缺陷
flag=0; //繼續
}
else //阻值正常
{
LEDG=0; //綠燈亮正常
LEDR=1; //紅燈熄
flag=1;
}
}
}
//延時函數
void Delay500us(void) //500us@11.0592MHz
{
unsigned char data i, j;
_nop_();
_nop_();
i = 8;
j = 43;
do
{
while (--j);
} while (--i);
}
//延時函數
void Delay_ms(unsigned int t) //@11.0592MHz
{
unsigned char data i, j;
while (t--)
{
i = 15;
j = 90;
do
{
while (--j);
} while (--i);
}
}
//初始化ADC
void ADC_Init(void)
{
P_SW2 |= 0x80; //開擴展寄存器
ADCTIM = 0x3f; //設置ADC內部時序
P_SW2 &= 0x7f; //關擴展寄存器
ADCCFG = 0x2f; //設置ADC時鐘為系統時鐘/2/16，12位結果右對齊
ADC_CONTR = 0x80; //使能ADC模塊
}
//讀取ADC結果
uint ADC_Read(uchar ch)
{
ADC_CONTR = 0xc0|ch; //啟動AD轉換
_nop_(); //小延時
_nop_();
while (!(ADC_CONTR & 0x20)); //查詢ADC完成標志
ADC_CONTR &= ~0x20; //清完成標志
return ADC_RES << 8 | ADC_RESL;//返回12位ADC結果
}
//ADC電阻換算公式：被測阻值=((固定分壓電阻值*AD轉換值)/(4096-AD轉換值)
uint ADC_R(uchar dat)
{
uint teme;
ADC_Read(dat); //丟掉兩次檢測
ADC_Read(dat);
VADC=ADC_Read(dat); //讀取第x通道ADC結果
teme=(VCR*(ulong)VADC)/(4096-VADC)-30;//計算阻值(減30為IO口限流電阻)
return teme;
}

復制代碼

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