原理图：

 部分程序：

#include "stc15.h"
#include "delay.h"
#include "timer.h"
#include "TM7707.h"
#include "LCD1602.h"
#include "eeprom.h"
#include "stdio.h"
#include "stdlib.h"
#include "math.h"

#if (defined USE_TM7707)
#define TM_ADC_TO_VOLGATE    1.49056e-4 //
#define TM_ADC_TO_CURRENT    2.98023e-4
#elif (defined USE_TM7705)
#define TM_ADC_TO_VOLGATE    3.81469e-2
#define TM_ADC_TO_CURRENT    3.81469e-2
#endif
#define TM_VOLGATE_RATIO    25
#define TM_REAL_VOLGATE        (TM_ADC_TO_VOLGATE*TM_VOLGATE_RATIO)
#define TM_REAL_CURRENT        (TM_ADC_TO_CURRENT)

static void System_Config(void);
static void ChoiceMode(void);
static unsigned char KeyScan(void);

unsigned char code releaseKey[15] = "Release key    ";
unsigned char code input0A[15] = "Input 0.000A   ";
unsigned char code input5V[15] = "Input 5.000V   ";
unsigned char code input3A[15] = "Input 3.000A   ";
unsigned char code calibFinish[15] = "Finish         ";
unsigned char code V_UP[2] = "V+";
unsigned char code V_DOWN[2] = "V-";
unsigned char code I_UP[2] = "A+";
unsigned char code I_DOWN[2] = "A-";

xdata float v_ratio=1.0f;
xdata float i_ratio=1.0f;
xdata long volgate=0;
xdata long current=0, i_offset=0;
xdata long power=0;
xdata long ohm=0;
xdata long AH=0;
xdata unsigned int timer_cnt=0;
xdata unsigned char dis_cnt=0;
xdata unsigned char sec=0;
xdata unsigned char min=0;
xdata unsigned char hour=0;
unsigned long sec_sum=0;
float ah_sec=0;
float ah_sum=0;
xdata unsigned char mode_flag=1;

xdata long mTemp=0;

bit isDisFlag=1;
bit isDisAhStop=1;
bit isUpdataAH = 0;

/***************************************************
 *
 *
 *
 */
void main(void)
{
    unsigned char keyCode=0;
    
    System_Config();
    LCD1602_Config();
    Timer_Config();
    TM770x_Config();
    EA = 1;
    ChoiceMode();
    EA = 0;
    mode_flag = IapReadByte(EEPROM_MODE_ADDR);
    IapReadData(EEPROM_V_RATIO_ADDR, (long*)&volgate);
    IapReadData(EEPROM_I_RATIO_ADDR, (long*)&current);
    IapReadData(EEPROM_I_ZERO_ADDR, (long*)&i_offset);
    EA = 1;
    v_ratio = volgate*1e-5;
    i_ratio = current*1e-5;
    if(mode_flag!=2 && mode_flag!=1)
    {
        mode_flag = 1;
        IapSaveData(EEPROM_MODE_ADDR, (unsigned char*)&mode_flag, 1);
    }
    
    volgate = 0;
    current = 0;
    AH = 0;

    LCD1602_Write(LCD_WR_CMD, 0x01);
    delay_ms(10);
    
//    volgate = 123456;
//    DisplayNumber(0,0, volgate, 0xFF);
//    DisplayTimer(hour,min,sec);
//    while(1);
//    mode_flag = 1;
    
    for(;;)
    {
        keyCode = KeyScan();
        if(keyCode==0)
        {
            if(mode_flag==2)
            {
                hour = 0;

资料内容：

 

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