ICM_20948.h

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/*
 
A C++ interface to the ICM-20948
 
*/
 
#ifndef _ICM_20948_H_
#define _ICM_20948_H_
 
#include "util/ICM_20948_C.h" // The C backbone. ICM_20948_USE_DMP is defined in here.
#include "util/AK09916_REGISTERS.h"
 
#include "Arduino.h" // Arduino support
#include "Wire.h"
#include "SPI.h"
 
#define ICM_20948_ARD_UNUSED_PIN 0xFF
 
// Base
class ICM_20948
{
private:
  Stream *_debugSerial;     //The stream to send debug messages to if enabled
  bool _printDebug = false; //Flag to print the serial commands we are sending to the Serial port for debug
 
  const uint8_t MAX_MAGNETOMETER_STARTS = 10; // This replaces maxTries
 
protected:
  ICM_20948_Device_t _device;
 
  float getTempC(int16_t val);
  float getGyrDPS(int16_t axis_val);
  float getAccMG(int16_t axis_val);
  float getMagUT(int16_t axis_val);
 
public:
  ICM_20948(); // Constructor
 
// Enable debug messages using the chosen Serial port (Stream)
// Boards like the RedBoard Turbo use SerialUSB (not Serial).
// But other boards like the SAMD51 Thing Plus use Serial (not SerialUSB).
// These lines let the code compile cleanly on as many SAMD boards as possible.
#if defined(ARDUINO_ARCH_SAMD) // Is this a SAMD board?
#if defined(USB_VID) // Is the USB Vendor ID defined?
#if (USB_VID == 0x1B4F) // Is this a SparkFun board?
#if !defined(ARDUINO_SAMD51_THING_PLUS) & !defined(ARDUINO_SAMD51_MICROMOD) // If it is not a SAMD51 Thing Plus or SAMD51 MicroMod
  void enableDebugging(Stream &debugPort = SerialUSB); //Given a port to print to, enable debug messages.
#else
  void enableDebugging(Stream &debugPort = Serial); //Given a port to print to, enable debug messages.
#endif
#else
  void enableDebugging(Stream &debugPort = Serial); //Given a port to print to, enable debug messages.
#endif
#else
  void enableDebugging(Stream &debugPort = Serial); //Given a port to print to, enable debug messages.
#endif
#else
  void enableDebugging(Stream &debugPort = Serial); //Given a port to print to, enable debug messages.
#endif
 
  void disableDebugging(void); //Turn off debug statements
 
  void debugPrintStatus(ICM_20948_Status_e stat);
 
  // gfvalvo's flash string helper code: https://forum.arduino.cc/index.php?topic=533118.msg3634809#msg3634809
  void debugPrint(const char *);
  void debugPrint(const __FlashStringHelper *);
  void debugPrintln(const char *);
  void debugPrintln(const __FlashStringHelper *);
  void doDebugPrint(char (*)(const char *), const char *, bool newLine = false);
 
  void debugPrintf(int i);
  void debugPrintf(float f);
 
  ICM_20948_AGMT_t agmt;          // Acceleometer, Gyroscope, Magenetometer, and Temperature data
  ICM_20948_AGMT_t getAGMT(void); // Updates the agmt field in the object and also returns a copy directly
 
  float magX(void); // micro teslas
  float magY(void); // micro teslas
  float magZ(void); // micro teslas
 
  float accX(void); // milli g's
  float accY(void); // milli g's
  float accZ(void); // milli g's
 
  float gyrX(void); // degrees per second
  float gyrY(void); // degrees per second
  float gyrZ(void); // degrees per second
 
  float temp(void); // degrees celsius
 
  ICM_20948_Status_e status;                                              // Status from latest operation
  const char *statusString(ICM_20948_Status_e stat = ICM_20948_Stat_NUM); // Returns a human-readable status message. Defaults to status member, but prints string for supplied status if supplied
 
  // Device Level
  ICM_20948_Status_e setBank(uint8_t bank);                                // Sets the bank
  ICM_20948_Status_e swReset(void);                                        // Performs a SW reset
  ICM_20948_Status_e sleep(bool on = false);                               // Set sleep mode for the chip
  ICM_20948_Status_e lowPower(bool on = true);                             // Set low power mode for the chip
  ICM_20948_Status_e setClockSource(ICM_20948_PWR_MGMT_1_CLKSEL_e source); // Choose clock source
  ICM_20948_Status_e checkID(void);                                        // Return 'ICM_20948_Stat_Ok' if whoami matches ICM_20948_WHOAMI
 
  bool dataReady(void);    // Returns 'true' if data is ready
  uint8_t getWhoAmI(void); // Return whoami in out prarmeter
  bool isConnected(void);  // Returns true if communications with the device are sucessful
 
  // Internal Sensor Options
  ICM_20948_Status_e setSampleMode(uint8_t sensor_id_bm, uint8_t lp_config_cycle_mode); // Use to set accel, gyro, and I2C master into cycled or continuous modes
  ICM_20948_Status_e setFullScale(uint8_t sensor_id_bm, ICM_20948_fss_t fss);
  ICM_20948_Status_e setDLPFcfg(uint8_t sensor_id_bm, ICM_20948_dlpcfg_t cfg);
  ICM_20948_Status_e enableDLPF(uint8_t sensor_id_bm, bool enable);
  ICM_20948_Status_e setSampleRate(uint8_t sensor_id_bm, ICM_20948_smplrt_t smplrt);
 
  // Interrupts on INT and FSYNC Pins
  ICM_20948_Status_e clearInterrupts(void);
 
  ICM_20948_Status_e cfgIntActiveLow(bool active_low);
  ICM_20948_Status_e cfgIntOpenDrain(bool open_drain);
  ICM_20948_Status_e cfgIntLatch(bool latching);         // If not latching then the interrupt is a 50 us pulse
  ICM_20948_Status_e cfgIntAnyReadToClear(bool enabled); // If enabled, *ANY* read will clear the INT_STATUS register. So if you have multiple interrupt sources enabled be sure to read INT_STATUS first
  ICM_20948_Status_e cfgFsyncActiveLow(bool active_low);
  ICM_20948_Status_e cfgFsyncIntMode(bool interrupt_mode); // Can use FSYNC as an interrupt input that sets the I2C Master Status register's PASS_THROUGH bit
 
  ICM_20948_Status_e intEnableI2C(bool enable);
  ICM_20948_Status_e intEnableDMP(bool enable);
  ICM_20948_Status_e intEnablePLL(bool enable);
  ICM_20948_Status_e intEnableWOM(bool enable);
  ICM_20948_Status_e intEnableWOF(bool enable);
  ICM_20948_Status_e intEnableRawDataReady(bool enable);
  ICM_20948_Status_e intEnableOverflowFIFO(uint8_t bm_enable);
  ICM_20948_Status_e intEnableWatermarkFIFO(uint8_t bm_enable);
 
  ICM_20948_Status_e WOMLogic(uint8_t enable, uint8_t mode);
  ICM_20948_Status_e WOMThreshold(uint8_t threshold);
 
  // Interface Options
  ICM_20948_Status_e i2cMasterPassthrough(bool passthrough = true);
  ICM_20948_Status_e i2cMasterEnable(bool enable = true);
  ICM_20948_Status_e i2cMasterReset();
 
  //Used for configuring peripherals 0-3
  ICM_20948_Status_e i2cControllerConfigurePeripheral(uint8_t peripheral, uint8_t addr, uint8_t reg, uint8_t len, bool Rw = true, bool enable = true, bool data_only = false, bool grp = false, bool swap = false, uint8_t dataOut = 0);
  ICM_20948_Status_e i2cControllerPeriph4Transaction(uint8_t addr, uint8_t reg, uint8_t *data, uint8_t len, bool Rw, bool send_reg_addr = true);
 
  //Provided for backward-compatibility only. Please update to i2cControllerConfigurePeripheral and i2cControllerPeriph4Transaction.
  //https://www.oshwa.org/2020/06/29/a-resolution-to-redefine-spi-pin-names/
  ICM_20948_Status_e i2cMasterConfigureSlave(uint8_t peripheral, uint8_t addr, uint8_t reg, uint8_t len, bool Rw = true, bool enable = true, bool data_only = false, bool grp = false, bool swap = false);
  ICM_20948_Status_e i2cMasterSLV4Transaction(uint8_t addr, uint8_t reg, uint8_t *data, uint8_t len, bool Rw, bool send_reg_addr = true);
 
  //Used for configuring the Magnetometer
  ICM_20948_Status_e i2cMasterSingleW(uint8_t addr, uint8_t reg, uint8_t data);
  uint8_t i2cMasterSingleR(uint8_t addr, uint8_t reg);
 
  // Default Setup
  ICM_20948_Status_e startupDefault(bool minimal = false); // If minimal is true, several startup steps are skipped. If ICM_20948_USE_DMP is defined, .begin will call startupDefault with minimal set to true.
 
  // direct read/write
  ICM_20948_Status_e read(uint8_t reg, uint8_t *pdata, uint32_t len);
  ICM_20948_Status_e write(uint8_t reg, uint8_t *pdata, uint32_t len);
 
  //Mag specific
  ICM_20948_Status_e startupMagnetometer(bool minimal = false); // If minimal is true, several startup steps are skipped. The mag then needs to be set up manually for the DMP.
  ICM_20948_Status_e magWhoIAm(void);
  uint8_t readMag(AK09916_Reg_Addr_e reg);
  ICM_20948_Status_e writeMag(AK09916_Reg_Addr_e reg, uint8_t *pdata);
  ICM_20948_Status_e resetMag();
 
  //FIFO
  ICM_20948_Status_e enableFIFO(bool enable = true);
  ICM_20948_Status_e resetFIFO(void);
  ICM_20948_Status_e setFIFOmode(bool snapshot = false); // Default to Stream (non-Snapshot) mode
  ICM_20948_Status_e getFIFOcount(uint16_t *count);
  ICM_20948_Status_e readFIFO(uint8_t *data, uint8_t len = 1);
 
  //DMP
 
  //Gyro Bias
  ICM_20948_Status_e setBiasGyroX(int32_t newValue);
  ICM_20948_Status_e setBiasGyroY(int32_t newValue);
  ICM_20948_Status_e setBiasGyroZ(int32_t newValue);
  ICM_20948_Status_e getBiasGyroX(int32_t* bias);
  ICM_20948_Status_e getBiasGyroY(int32_t* bias);
  ICM_20948_Status_e getBiasGyroZ(int32_t* bias);
  //Accel Bias
  ICM_20948_Status_e setBiasAccelX(int32_t newValue);
  ICM_20948_Status_e setBiasAccelY(int32_t newValue);
  ICM_20948_Status_e setBiasAccelZ(int32_t newValue);
  ICM_20948_Status_e getBiasAccelX(int32_t* bias);
  ICM_20948_Status_e getBiasAccelY(int32_t* bias);
  ICM_20948_Status_e getBiasAccelZ(int32_t* bias);
  //CPass Bias
  ICM_20948_Status_e setBiasCPassX(int32_t newValue);
  ICM_20948_Status_e setBiasCPassY(int32_t newValue);
  ICM_20948_Status_e setBiasCPassZ(int32_t newValue);
  ICM_20948_Status_e getBiasCPassX(int32_t* bias);
  ICM_20948_Status_e getBiasCPassY(int32_t* bias);
  ICM_20948_Status_e getBiasCPassZ(int32_t* bias);
 
  // Done:
  //  Configure DMP start address through PRGM_STRT_ADDRH/PRGM_STRT_ADDRL
  //  Load Firmware
  //  Configure Accel scaling to DMP
  //  Configure Compass mount matrix and scale to DMP
  //  Reset FIFO
  //  Reset DMP
  //  Enable DMP interrupt
  //  Configuring DMP to output data to FIFO: set DATA_OUT_CTL1, DATA_OUT_CTL2, DATA_INTR_CTL and MOTION_EVENT_CTL
  //  Configuring DMP to output data at multiple ODRs
  //  Configure DATA_RDY_STATUS
  //  Configuring Accel calibration
  //  Configuring Compass calibration
  //  Configuring Gyro gain
  //  Configuring Accel gain
  //  Configure I2C_SLV0 and I2C_SLV1 to: request mag data from the hidden reserved AK09916 registers; trigger Single Measurements
  //  Configure I2C Master ODR (default to 68.75Hz)
 
  // To Do:
  //  Additional FIFO output control: FIFO_WATERMARK, BM_BATCH_MASK, BM_BATCH_CNTR, BM_BATCH_THLD
  //  Configuring DMP features: PED_STD_STEPCTR, PED_STD_TIMECTR
  //  Enabling Activity Recognition (BAC) feature
  //  Enabling Significant Motion Detect (SMD) feature
  //  Enabling Tilt Detector feature
  //  Enabling Pick Up Gesture feature
  //  Enabling Fsync detection feature
  //  Biases: add save and load methods
 
  ICM_20948_Status_e enableDMP(bool enable = true);
  ICM_20948_Status_e resetDMP(void);
  ICM_20948_Status_e loadDMPFirmware(void);
  ICM_20948_Status_e setDMPstartAddress(unsigned short address = DMP_START_ADDRESS);
  ICM_20948_Status_e enableDMPSensor(enum inv_icm20948_sensor sensor, bool enable = true);
  ICM_20948_Status_e enableDMPSensorInt(enum inv_icm20948_sensor sensor, bool enable = true);
  ICM_20948_Status_e writeDMPmems(unsigned short reg, unsigned int length, const unsigned char *data);
  ICM_20948_Status_e readDMPmems(unsigned short reg, unsigned int length, unsigned char *data);
  ICM_20948_Status_e setDMPODRrate(enum DMP_ODR_Registers odr_reg, int interval);
  ICM_20948_Status_e readDMPdataFromFIFO(icm_20948_DMP_data_t *data);
  ICM_20948_Status_e setGyroSF(unsigned char div, int gyro_level);
  ICM_20948_Status_e initializeDMP(void) __attribute__((weak)); // Combine all of the DMP start-up code in one place. Can be overwritten if required
};
 
// I2C
 
// Forward declarations of TwoWire and Wire for board/variant combinations that don't have a default 'SPI'
//class TwoWire; // Commented by PaulZC 21/2/8 - this was causing compilation to fail on the Arduino NANO 33 BLE
//extern TwoWire Wire; // Commented by PaulZC 21/2/8 - this was causing compilation to fail on the Arduino NANO 33 BLE
 
class ICM_20948_I2C : public ICM_20948
{
private:
protected:
public:
  TwoWire *_i2c;
  uint8_t _addr;
  uint8_t _ad0;
  bool _ad0val;
  ICM_20948_Serif_t _serif;
 
  ICM_20948_I2C(); // Constructor
 
  virtual ICM_20948_Status_e begin(TwoWire &wirePort = Wire, bool ad0val = true, uint8_t ad0pin = ICM_20948_ARD_UNUSED_PIN);
};
 
// SPI
#define ICM_20948_SPI_DEFAULT_FREQ 4000000
#define ICM_20948_SPI_DEFAULT_ORDER MSBFIRST
#define ICM_20948_SPI_DEFAULT_MODE SPI_MODE0
 
// Forward declarations of SPIClass and SPI for board/variant combinations that don't have a default 'SPI'
//class SPIClass; // Commented by PaulZC 21/2/8 - this was causing compilation to fail on the Arduino NANO 33 BLE
//extern SPIClass SPI; // Commented by PaulZC 21/2/8 - this was causing compilation to fail on the Arduino NANO 33 BLE
 
class ICM_20948_SPI : public ICM_20948
{
private:
protected:
public:
  SPIClass *_spi;
  SPISettings _spisettings;
  uint8_t _cs;
  ICM_20948_Serif_t _serif;
 
  ICM_20948_SPI(); // Constructor
 
  ICM_20948_Status_e begin(uint8_t csPin, SPIClass &spiPort = SPI, uint32_t SPIFreq = ICM_20948_SPI_DEFAULT_FREQ);
};
 
#endif /* _ICM_20948_H_ */