/***************************************************?
??This?is?a?library?for?the??PT100/P1000?RTD?Sensor?MAX31865

?****************************************************/
#include?“GlobalsDef.h“
#include?“math.h“

#define?GetDRDY（）???????????????GPIO_ReadInputDataBit（MAX_DRDY_PORTMAX_DRDY_PIN）??
#define?spixfer（a）??????????????Spi2_ReadWriteByte（a）


void??readRegisterN（uint8_t?addr?uint8_t?buffer[]?uint8_t?n）?
{
???addr?&=?0x7F;?//?make?sure?top?bit?is?not?set
???
???Spi2CSn_Enable（）;
???
???spixfer（addr）;???
???while?（n--）?
???{
??????buffer[0]?=?spixfer（0xFF）;
??????buffer++;
???}
???
???Spi2CSn_Disable（）;
}

void?writeRegister8（uint8_t?addr?uint8_t?data）?
{
???Spi2CSn_Enable（）;
???
???spixfer（addr?|?0x80）;???//?make?sure?top?bit?is?set
???spixfer（data）;
???
???Spi2CSn_Disable（）;
}


uint8_t?readRegister8（uint8_t?addr）?
{
??uint8_t?ret?=?0;
??readRegisterN（addr?&ret?1）;

??return?ret;
}

uint16_t?readRegister16（uint8_t?addr）?
{
??uint8_t?buffer[2]?=?{0?0};
??
??readRegisterN（addr?buffer?2）;

??uint16_t?ret?=?buffer[0];
??ret?<<=?8;
??ret?|=??buffer[1];
??
??return?ret;
}

void??setWires（max31865_numwires_t?wires?）?
{
??uint8_t?t?=?readRegister8（MAX31856_CONFIG_REG）;
??
??if?（wires?==?MAX31865_3WIRE）?
??{
????t?|=?MAX31856_CONFIG_3WIRE;
??}?
??else?
??{
????//?2?or?4?wire
????t?&=?~MAX31856_CONFIG_3WIRE;
??}
??writeRegister8（MAX31856_CONFIG_REG?t）;
}

bool?max31865_config（max31865_numwires_t?wires）?
{
???SPIx_Configuration（SPI2）;
??
???setWires（wires）;
???enableBias（FALSE）;
???autoConvert（FALSE）;
???clearFault（）;
??
//???writeRegister8（MAX31856_CONFIG_REG?0xD2）;
???
???return?TRUE;
}


uint8_t?readFault（void）?
{
??return?readRegister8（MAX31856_FAULTSTAT_REG）;
}

void?clearFault（void）?
{
??uint8_t?t?=?readRegister8（MAX31856_CONFIG_REG）;
??
??t?&=?~0x2C;
??t?|=?MAX31856_CONFIG_FAULTSTAT;
??writeRegister8（MAX31856_CONFIG_REG?t）;
}

void?enableBias（bool?b）?
{
??uint8_t?t?=?readRegister8（MAX31856_CONFIG_REG）;
??
??if?（b）?
??{
????t?|=?MAX31856_CONFIG_BIAS;???????//?enable?bias
??}?
??else?
??{
????t?&=?~MAX31856_CONFIG_BIAS;???????//?disable?bias
??}
??writeRegister8（MAX31856_CONFIG_REG?t）;
}

void?autoConvert（bool?b）?
{
???uint8_t?t?=?readRegister8（MAX31856_CONFIG_REG）;
???
???if?（b）?
???{
??????t?|=?MAX31856_CONFIG_MODEAUTO;???????//?enable?autoconvert
???}?
???else?
???{
??????t?&=?~MAX31856_CONFIG_MODEAUTO;???????//?disable?autoconvert
???}
???writeRegister8（MAX31856_CONFIG_REG?t）;
}



float??temperature（float?RTDnominal?float?refResistor）?
{
??//?http://www.analog.com/media/en/technical-documentation/application-notes/AN709_0.pdf

??float?Z1?Z2?Z3?Z4?Rt?temp;


??Rt?=?readRTD（）;
??
??Rt?/=?32768;
??Rt?*=?refResistor;
??
??//?Serial.print（“\nResistance:?“）;?Serial.println（Rt?8）;

??Z1?=?-RTD_A;
??Z2?=?RTD_A?*?RTD_A?-?（4?*?RTD_B）;
??Z3?=?（4?*?RTD_B）?/?RTDnominal;
??Z4?=?2?*?

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????4820??2018-07-17?10:26??MAX31865.c

?????文件???????2092??2018-07-13?15:31??MAX31865.h

-----------?---------??----------?-----??----

?????????????????6912????????????????????2