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@wollewald
wollewald authored Oct 25, 2022
1 parent bf18b6d commit 70e2ba7
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Showing 2 changed files with 88 additions and 91 deletions.
10 changes: 2 additions & 8 deletions src/ADS1220_WE.cpp
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Expand Up @@ -25,12 +25,6 @@

#include "ADS1220_WE.h"

ADS1220_WE::ADS1220_WE(int cs, int drdy, SPIClass *s){
csPin = cs;
drdyPin = drdy;
_spi = s;
}

uint8_t ADS1220_WE::init(){
vRef = 2.048;
gain = 1;
Expand Down Expand Up @@ -300,7 +294,7 @@ float ADS1220_WE::getTemperature(){
uint32_t rawResult = readResult();
enableTemperatureSensor(false);

uint16_t result = (uint16_t)(rawResult >> 18);
uint16_t result = static_cast<uint16_t>(rawResult >> 18);
if(result>>13){
result = ~(result-1) & 0x3777;
return result * (-0.03125);
Expand All @@ -321,7 +315,7 @@ void ADS1220_WE::forcedBypassPGA(){

int32_t ADS1220_WE::getData(){
uint32_t rawResult = readResult();
int32_t result = ((int32_t)(rawResult)) >> 8;
int32_t result = (static_cast<int32_t>(rawResult)) >> 8;

return result;
}
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169 changes: 86 additions & 83 deletions src/ADS1220_WE.h
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Expand Up @@ -34,23 +34,6 @@
#endif
#include<SPI.h>

//ADS1220 SPI commands
#define ADS1220_RESET 0x06
#define ADS1220_START 0x08 //Send the START/SYNC command (08h) to start converting in continuous conversion mode
#define ADS1220_PWRDOWN 0x02
#define ADS1220_RDATA 0x10
#define ADS1220_WREG 0x40 // write register
#define ADS1220_RREG 0x20 // read register

/* registers */
#define ADS1220_CONF_REG_0 0x00
#define ADS1220_CONF_REG_1 0x01
#define ADS1220_CONF_REG_2 0x02
#define ADS1220_CONF_REG_3 0x03

/* other */
#define ADS1220_RANGE 8388607.0 // = 2^23 - 1

typedef enum ADS1220_MUX {
ADS1220_MUX_0_1 = 0x00, //default
ADS1220_MUX_0_2 = 0x10,
Expand Down Expand Up @@ -150,73 +133,93 @@ typedef enum ADS1220_DRDY_MODE {

class ADS1220_WE
{
public:
ADS1220_WE(int cs, int drdy, SPIClass *s = &SPI);

/* Commands */
uint8_t init();
void start();
void reset();
void powerDown();

/* Configuration Register 0 settings */
void setCompareChannels(ads1220Mux mux);
void setGain(ads1220Gain gain);
uint8_t getGainFactor();
void bypassPGA(bool bypass);
bool isPGABypassed();

/* Configuration Register 1 settings */
void setDataRate(ads1220DataRate rate);
void setOperatingMode(ads1220OpMode mode);
void setConversionMode(ads1220ConvMode mode);
void enableTemperatureSensor(bool enable);
void enableBurnOutCurrentSources(bool enable);

/* Configuration Register 2 settings */
void setVRefSource(ads1220VRef vRefSource);
void setFIRFilter(ads1220FIR fir);
void setLowSidePowerSwitch(ads1220PSW psw);
void setIdacCurrent(ads1220IdacCurrent current);

/* Configuration Register 3 settings */
void setIdac1Routing(ads1220IdacRouting route);
void setIdac2Routing(ads1220IdacRouting route);
void setDrdyMode(ads1220DrdyMode mode);

/* Other settings */
void setSPIClockSpeed(unsigned long clock);
void setVRefValue_V(float refVal);
float getVRef_V();
void setAvddAvssAsVrefAndCalibrate();
void setRefp0Refn0AsVefAndCalibrate();
void setRefp1Refn1AsVefAndCalibrate();
void setIntVRef();
public:

//ADS1220 SPI commands
static constexpr uint8_t ADS1220_RESET {0x06};
static constexpr uint8_t ADS1220_START {0x08}; //Send the START/SYNC command (08h) to start converting in continuous conversion mode
static constexpr uint8_t ADS1220_PWRDOWN {0x02};
static constexpr uint8_t ADS1220_RDATA {0x10};
static constexpr uint8_t ADS1220_WREG {0x40}; // write register
static constexpr uint8_t ADS1220_RREG {0x20}; // read register

/* registers */
static constexpr uint8_t ADS1220_CONF_REG_0 {0x00};
static constexpr uint8_t ADS1220_CONF_REG_1 {0x01};
static constexpr uint8_t ADS1220_CONF_REG_2 {0x02};
static constexpr uint8_t ADS1220_CONF_REG_3 {0x03};

/* other */
static constexpr float ADS1220_RANGE {8388607.0}; // = 2^23 - 1 as float

/* Results */
float getVoltage_mV();
float getVoltage_muV();
int32_t getRawData();
float getTemperature();

private:
SPIClass *_spi;
SPISettings mySPISettings;
int16_t csPin;
int16_t drdyPin;
uint8_t regValue;
float vRef;
uint8_t gain;
bool refMeasurement;
bool doNotBypassPgaIfPossible;
ads1220ConvMode convMode;

void forcedBypassPGA();
int32_t getData();
uint32_t readResult();
uint8_t readRegister(uint8_t reg);
void writeRegister(uint8_t reg, uint8_t val);
void command(uint8_t cmd);
/* Constructors */
ADS1220_WE(int cs, int drdy) : _spi{&SPI}, csPin{cs}, drdyPin{drdy} {}
ADS1220_WE(SPIClass *s, int cs, int drdy) : _spi{s}, csPin{cs}, drdyPin{drdy} {}

/* Commands */
uint8_t init();
void start();
void reset();
void powerDown();

/* Configuration Register 0 settings */
void setCompareChannels(ads1220Mux mux);
void setGain(ads1220Gain gain);
uint8_t getGainFactor();
void bypassPGA(bool bypass);
bool isPGABypassed();

/* Configuration Register 1 settings */
void setDataRate(ads1220DataRate rate);
void setOperatingMode(ads1220OpMode mode);
void setConversionMode(ads1220ConvMode mode);
void enableTemperatureSensor(bool enable);
void enableBurnOutCurrentSources(bool enable);

/* Configuration Register 2 settings */
void setVRefSource(ads1220VRef vRefSource);
void setFIRFilter(ads1220FIR fir);
void setLowSidePowerSwitch(ads1220PSW psw);
void setIdacCurrent(ads1220IdacCurrent current);

/* Configuration Register 3 settings */
void setIdac1Routing(ads1220IdacRouting route);
void setIdac2Routing(ads1220IdacRouting route);
void setDrdyMode(ads1220DrdyMode mode);

/* Other settings */
void setSPIClockSpeed(unsigned long clock);
void setVRefValue_V(float refVal);
float getVRef_V();
void setAvddAvssAsVrefAndCalibrate();
void setRefp0Refn0AsVefAndCalibrate();
void setRefp1Refn1AsVefAndCalibrate();
void setIntVRef();

/* Results */
float getVoltage_mV();
float getVoltage_muV();
int32_t getRawData();
float getTemperature();

protected:
SPIClass *_spi;
SPISettings mySPISettings;
int csPin;
int drdyPin;
uint8_t regValue;
float vRef;
uint8_t gain;
bool refMeasurement;
bool doNotBypassPgaIfPossible;
ads1220ConvMode convMode;

void forcedBypassPGA();
int32_t getData();
uint32_t readResult();
uint8_t readRegister(uint8_t reg);
void writeRegister(uint8_t reg, uint8_t val);
void command(uint8_t cmd);
};

#endif
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