C8051 ADC控制

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//-----------------------------------------------------------------------------
// ADC0.c
//-----------------------------------------------------------------------------
// Includes
//-----------------------------------------------------------------------------

#include <C8051F340.h> // SFR declarations
#include "public.h"

//-----------------------------------------------------------------------------
// 16-bit SFR Definitions for 'F34x
//-----------------------------------------------------------------------------

sfr16 ADC0 = 0xBD; // 10-bit ADC0 result

//-----------------------------------------------------------------------------
// Global Variables
// 模拟输入引脚配置:
//
// AMX0P Port Pin
// 0x02 P2.2
// 0x03 P2.3
// 0x1E 温度传感器

//-----------------------------------------------------------------------------
// Temperature Sensor Calibration PARAMETERS
//-----------------------------------------------------------------------------
#define AMB_TEMP 22 // Ambient Calibration Temperature
// (degC)此校准值取决于运行程序时的环境温度

#define TEMP_SENSOR_GAIN 2860 // Temp Sensor Gain in (uV / degC)

#define VREF 2470 // 3300 // ADC 参考电压 (mV)

#define TEMP_OFFSET 0 // offset

//-----------------------------------------------------------------------------
// ADC0_Init
//-----------------------------------------------------------------------------
//
// Return Value : None
// Parameters : None
//
//-----------------------------------------------------------------------------

void ADC0_Init (void)
{
ADC0CF = 0x20; //0x80 转换时钟为SYSCLK/17. 3M sysclk/5
ADC0LTH = 0xFF; //ADC上限数据高位
ADC0LTL = 0xFF; //ADC上限数据高位
ADC0GTH = 0x00; //ADC下限数据高位
ADC0GTL = 0x00; //ADC下限数据低位
ADC0CN = 0xC0;
REF0CN = 0x07;//0x0E 电压基准控制寄存器；2.457内部基准作为电压基准,内部偏压发生器工作,温度传感器工作使能
AMX0N = 0xFF; //GND 单端方式
}

uint ADconvert(uchar iChannels)
{
AMX0P = iChannels; //配置输入通道
AD0BUSY=1;
while(!AD0INT);
AD0INT=0;
return ADC0;
}

/////////////////////////////////
uint DET_DU_TR() //P2^2;
{ uint ADC_code,i,tmp;
ADC_code=ADconvert(0x02);
ADC_code=0;
for(i=0;i<10;i++) //配置P2^2;为单端输入
{ tmp=ADconvert(0x02);
ADC_code=ADC_code+tmp;
}
ADC_code=ADC_code/10;
return ADC_code;
}
uint DET_DU_40V() //P2^3;
{ uint ADC_code,i,tmp;
ADC_code=ADconvert(0x03);
ADC_code=0;
for(i=0;i<10;i++)
{ tmp=ADconvert(0x03); //配置P2^3;为单端输入
ADC_code=ADC_code+tmp;
}
ADC_code=ADC_code/10;
return ADC_code;
}
uint DET_DU_PC() //P2^4->P2^6;
{ uint ADC_code,i,tmp;
ADC_code=ADconvert(0x05);
ADC_code=0;
for(i=0;i<10;i++)
{ tmp=ADconvert(0x05);
ADC_code=ADC_code+tmp;
}
ADC_code=ADC_code/10;
return ADC_code;
}

uint DET_DU_36V() //P2^5;
{ uint ADC_code,i,tmp;
ADC_code=ADconvert(0x04);
ADC_code=0;
for(i=0;i<10;i++)
{ tmp=ADconvert(0x04);
ADC_code=ADC_code+tmp;
}
ADC_code=ADC_code/10;
return ADC_code;
}
sbit DI_TR = P3^0;
sbit DI_36V = P3^4;
sbit DI_PC = P3^1;
sbit DI_40V = P3^5;
///////////////////////////////////
uint DET_DI_TR() //P3^0;
{ uint ADC_code,i,tmp;
ADC_code=ADconvert(0x06);
ADC_code=0;

for(i=0;i<10;i++)
{ tmp=ADconvert(0x06);
ADC_code=ADC_code+tmp;
}
ADC_code=ADC_code/10;
return ADC_code;
}

ulong DET_DI_36V() //P3^4;
{
ulong ADC_code;
uint tmp;
uchar i; // EA=0;
ADC_code=ADconvert(0x08);
ADC_code=0;
for(i=0;i<20;i++)
{ tmp=ADconvert(0x08);
ADC_code=ADC_code+tmp;
}
ADC_code=ADC_code/20;//EA=1;
return ADC_code;
}

uint DET_DI_PC() //P3^1;
{ uint ADC_code,i,tmp;
ADC_code=ADconvert(0x07);
ADC_code=0;
for(i=0;i<10;i++)
{ tmp=ADconvert(0x07);
ADC_code=ADC_code+tmp;
}
ADC_code=ADC_code/10;
return ADC_code;
}
/*
uint DET_DI_40V() //P3^5;
{ uint ADC_code,i,tmp;
ADC_code=ADconvert(0x09);
ADC_code=0;
for(i=0;i<10;i++)
{ tmp=ADconvert(0x09);
ADC_code=ADC_code+tmp;
}
ADC_code=ADC_code/10;
return ADC_code;
}
//*/

////////////////////////////////////

uint Temprature_DET() //温度检测
{
AMX0P = 0x1e; //配置为单端输入
AD0BUSY=1;
while(!AD0INT);
AD0INT=0;
return ADC0;
}

uint get_temp_int(void) //返回数字采样值
{
uint ADC_code,i,tmp;
ADC_code = Temprature_DET();
ADC_code=0; //第一次采样丢掉
for(i=0;i<10;i++)
{
tmp=Temprature_DET();
ADC_code=ADC_code+tmp;
}
ADC_code=ADC_code/10;
return ADC_code;
}

int get_temp(void)
{
long result=0L;
//result=230; //仅做测试用

result=get_temp_int();

if(result>241)
{
result = (result * (long) VREF / 1024 -776)* 1000/ TEMP_SENSOR_GAIN ;
}
else //负温
{
result = 65536-(776-result * (long) VREF / 1024 )* 1000/ TEMP_SENSOR_GAIN ;
}

return (int) result;
} //*/
//-----------------------------------------------------------------------------
// End Of File
//-----------------------------------------------------------------------------

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