File content as of revision 0:894b603d32ee:

/*

A C++ interface to the ICM-20948

*/


// Modified from Arduino library at https://github.com/sparkfun/SparkFun_ICM-20948_ArduinoLibrary

#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 "mbed.h"

#define ICM_20948_ARD_UNUSED_PIN 0xFF

// Base
class ICM_20948
{
private:

  
  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

  Serial *_debugSerial; // change to serial port
  bool _printDebug = false; //Flag to print the serial commands we are sending to the Serial port for debug

  void enableDebugging(Serial &debugPort); // TODO: check this syntax

  void disableDebugging(void); //Turn off debug statements

  void debugPrintStatus(ICM_20948_Status_e stat);

  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
  
  // 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 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);

  //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

  // 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
};

// SPI
#define ICM_20948_SPI_DEFAULT_FREQ 4000000
#define ICM_20948_SPI_DEFAULT_ORDER MSBFIRST
#define ICM_20948_SPI_DEFAULT_MODE SPI_MODE0

class ICM_20948_SPI : public ICM_20948
{
private:
protected:
public:

  SPI *_spi;
  DigitalOut *_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);
  ICM_20948_Status_e begin(DigitalOut &cspin, SPI &spiPort, uint32_t SPIFreq = ICM_20948_SPI_DEFAULT_FREQ); // TODO: check this!
};

#endif /* _ICM_20948_H_ */