CELIS/SYSTEM/ads1015.c

 
#include "ads1015.h"
 
#include "stm32f10x_i2c.h"
 #include "sys.h"


static void ADS1115_delay(u16 D)
{
    while(--D);
}

void delay_nms(u16 ms)
{
    u16 i;
    u32 M = 0;//720W
    for(i = 0;i < ms; i++)
    for(M=12000;M > 0;M--);
}

void delay_nus(u16 us)
{
    u16 i;
    u16 M = 0;//720W
    for(i = 0;i < us; i++)
    for(M=72;M > 0;M--);
}



/////////////////PA8 SDA////PA9 SCL///////////////////////////////////
void ADS1115_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB ,ENABLE);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;//A SCL SDA
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    SDA_A1;
    SCL_A1;

}

//I2C????
void I2CStart_A(void)
{
   SDA_A1;
   ADS1115_delay(5);
   SCL_A1;
   ADS1115_delay(5);
   SDA_A0;
   ADS1115_delay(5);//MIN 160ns
   SCL_A0;
   ADS1115_delay(5);
}

//I2C????
void I2CStop_A(void)
{
   SDA_A0;
   ADS1115_delay(5);
   SCL_A1;
   ADS1115_delay(5);
   SDA_A1;
   ADS1115_delay(5);//MIN 160ns
}

//I2C ????
void I2CWriteByte_A(u8 DATA)
{
      u8 i;
      SCL_A0;
      for(i = 0;i < 8; i++)
      {
         if(DATA&0x80)
         {
              SDA_A1;
         }
         else
         {
              SDA_A0;
         }
         SCL_A1;//????????
         ADS1115_delay(5);
         SCL_A0;
         ADS1115_delay(5);
         DATA    = DATA << 1;  
      }
      SDA_A1;
      SCL_A1;
      ADS1115_delay(5);
      SCL_A0;
}


//I2C ????
u8 I2CReadByte_A(void)
{
    u8 TData=0,i;
    for(i=0;i<8;i++)
    {
        SCL_A1;
        ADS1115_delay(5);
        TData=TData<<1;
        if(SDA_AI)
        {
            TData|=0x01;
        }
        SCL_A0;
        ADS1115_delay(5);
    }
    SCL_A0;
    ADS1115_delay(5);
    SDA_A0;
    ADS1115_delay(5);
    SCL_A1;
    ADS1115_delay(5);
    SCL_A0;
    ADS1115_delay(5);
    SDA_A1;
    return TData;
}



/*********************************************************************
*????:  ADS1115Config
*?       ?: ??ADS1115??????,??????
*?       ?: HCMD :????8?(??,??,????)
            LCMD : ????8?(????? ???? ???? ??????)
*?       ?; ?
********************************************************************/
void ADS1115Config_A(u8 LCMD,u8 HCMD)
{
    u8 i=0;
    u8 Initdata[4];

    Initdata[0] = 0x90;  // ??0x90  ??ADR?? ????
    Initdata[1] = 0x01;// ?????
    Initdata[2] = HCMD;    // ??????
    Initdata[3] = LCMD;    // ??????
    SCL_A1;
    I2CStart_A();        //??
    for(i=0;i<4;i++)
    {
        I2CWriteByte_A(Initdata[i]);
        ADS1115_delay(10);
    }
    I2CStop_A();         //??
}

void SetThresHold_A(u16 L_TH,u16 H_TH)        //??????
{
   SCL_A1;
   I2CStart_A();      // ??
   I2CWriteByte_A(0x90);
   I2CWriteByte_A(0x02);//???????
   I2CWriteByte_A((L_TH>>8));
   I2CWriteByte_A(L_TH);
   I2CStop_A();       //??

   I2CStart_A();     //??
   I2CWriteByte_A(0x90);
   I2CWriteByte_A(0x03);//???????
   I2CWriteByte_A((H_TH>>8));
   I2CWriteByte_A(H_TH);
   I2CStop_A();      //??
}


/*******************************************************************
*????:  ReadAD_A
*?       ?: ??AD????
*?       ?: ???????????????
*?       ?; ?
********************************************************************/
 vs16 Data[2]={0,0};
u16 ReadAD_A(void)
{
  
//???????
   SCL_A1;
   I2CStart_A();
   I2CWriteByte_A(0x90);
   I2CWriteByte_A(0x00);
   I2CStop_A();                        
   
   I2CStart_A();
   I2CWriteByte_A(0x91);
   Data[0] = I2CReadByte_A();
   Data[1] = I2CReadByte_A();
   I2CStop_A();
   
   Data[0] = Data[0]<<8 | Data[1];
   return  (Data[0]);//&0x7fff
}

u16 getad(u8 LCMD,u8 HCMD)
{
    u16 value=0;
	static  u16 lastvalue=0;
    ADS1115Config_A(LCMD,HCMD);          //????
				
//    delay_nms(5);  
    value=ReadAD_A();
    return value;
}

u16 lvbo(u8 LCMD,u8 HCMD)        //?30??????
{
    static u16 data;
    static u32 U=0, temp;   //u32  float?double 
	static u8 index = 0;
	static u8 flag = 0;
	#if 1
	if(flag == 0)
	{
		 U+=getad(LCMD,HCMD);  
		if( index++>=9  )flag=1;
	 return data;    // 
	}
	else
	{
	    flag = 0;
		temp=U;
		U=0;
		index =0;
		data =  temp/10;
		return data;    // 
	}
	#else
    for(index=0;index<10;index++)
    {
        U+=getad(LCMD,HCMD);    
    }
    temp=U;
    U=0;
	#endif
    return ((float)temp/10);    // 
}
u16 t,result;
float t1; 
u16 resultFlag = 0;

float GetSampleVolt(u8 key)
{
		static u32 timer = 0;
		if(key==1)
		{                
			//          result=lvbo(0xeb,0x82);    //A0 A1????????  ???+???1111 1011,1000 0010
			result=lvbo(0x82,0xeb);  
			if(result >= 0x8000 && result <= 0xffff)
			result = 0xffff - result;   //????????,??A0 A1?????
			else if(result >= 0xffff)
			result = 0;

			t1=4.096*2*result/65535;     //????? 
			if(result == 0x7fff || result == 0x8000)
			{
				//printf("????!\r\n\r\n");
			}
			else
			{
				//printf("????!\r\n\r\n");
			}    
		}else if(key==2){                 
			result=lvbo(0xb2,0xe3); 
			if(result >= 0x8000)
			{
				resultFlag =1;
				result = 0xffff - result; //????????,??A2 A3?????
			}
			else
			{
			resultFlag =0;
			}
			t1=4.096*2*result/65535;     //adc <20><>ѹ
			// 4.99/1332.99 X s =t1;
			//t1 = t1*1332.99/4.99;
			t1 = t1*13329.9/4.99;

			if(resultFlag == 1) 
			{
				if(TickOut(&timer, 2000)==TRUE)
				{
					printf("Negative voltage sample fault!\r\n");
					TickOut(&timer, 0);
				}
				 
				t1 = 0-t1;
			}
			else
			{
				//printf("????!\r\n\r\n");
			}    
		}    
		else if(key == 3)
		{
		 
			result=lvbo(0xb4,0xe3); 
			if((result >= 0x8000) && (result <= 0xffff))
			result = 0xffff - result;   //????????,??A0 A1?????
			else if(result >= 0xffff)
			result = 0;
			t1=2.048*2*result/65535;     //?????

			//printf("???2.048V,A0-A1???? = %f V\r\n",t1);//??
			if(result == 0x7fff || result == 0x8000)
			{
				//printf("????!\r\n\r\n");
			}
			else
			{
				//printf("????!\r\n\r\n");
			}
		}
    return t1;
}