File content as of revision 7:2c48702d99e3:

/**********************************************************************
* Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name of Maxim Integrated
* Products, Inc. shall not be used except as stated in the Maxim Integrated
* Products, Inc. Branding Policy.
*
* The mere transfer of this software does not imply any licenses
* of trade secrets, proprietary technology, copyrights, patents,
* trademarks, maskwork rights, or any other form of intellectual
* property whatsoever. Maxim Integrated Products, Inc. retains all
* ownership rights.
**********************************************************************/


#include "mbed.h"
#include "bmi160.h"
//#include "max32630hsp.h"
#include "max32630fthr.h"
#include "USBSerial.h"
#include "stdlib.h"
#include "math.h"

//MAX32630HSP icarus(MAX32630HSP::VIO_3V3);
MAX32630FTHR pegasus(MAX32630FTHR::VIO_3V3);

Serial daplink(P2_1, P2_0);

DigitalOut rLED(P2_4, LED_ON);
DigitalOut gLED(P2_5, LED_ON);
DigitalOut bLED(P2_6, LED_ON);

PwmOut PWM(P3_5);
DigitalOut Dir(P3_4);


USBSerial pc(USBTX,USBRX);

I2C i2cBus(I2C2_SDA, I2C2_SCL);



BMI160_I2C imu(i2cBus, BMI160_I2C::I2C_ADRS_SDO_LO);


void dumpImuRegisters(BMI160 &imu);
void printRegister(BMI160 &imu, BMI160::Registers reg);
void printBlock(BMI160 &imu, BMI160::Registers startReg, BMI160::Registers stopReg);
void writeReg(BMI160 &imu, BMI160::Registers reg, uint8_t data);
//float compFilter(float K, float pitch, float gyroX, float accY, float accZ,float DT);


float compFilter(float K, float pitch, float gyroX, float accY, float accZ,float DT)
{
    return ((K * (pitch + (gyroX * DT))) + ((1.0F - K) * ((180.0F / 3.1459F) * atan(accY/accZ))));
}


int main()
{
    i2cBus.frequency(400000);
    writeReg(imu, BMI160::GYR_RANGE, BMI160::DPS_500);
    writeReg(imu, BMI160::GYR_CONF, BMI160::GYRO_ODR_13);
    writeReg(imu, BMI160::FOC_CONF, BMI160::FOC_VALUE );
    wait(0.5);
    writeReg(imu, BMI160::OFFSET_6, BMI160::FOC_ENABLE_GYR_ACC);
    gLED = 1;
    bLED = 0;
    wait(1);
    
    writeReg(imu, BMI160::CMD, BMI160::FOC_START);
    
    wait(1);
    gLED = 0;
    bLED = 0;

    pc.printf("\033[H");  //home
    pc.printf("\033[0J");  //erase from cursor to end of screen

    uint32_t failures = 0;

    if(imu.setSensorPowerMode(BMI160::GYRO, BMI160::NORMAL) != BMI160::RTN_NO_ERROR)
    {
        pc.printf("Failed to set gyroscope power mode\r\n");
        failures++;
    }
    wait_ms(100);

    if(imu.setSensorPowerMode(BMI160::ACC, BMI160::NORMAL) != BMI160::RTN_NO_ERROR)
    {
        pc.printf("Failed to set accelerometer power mode\r\n");
        failures++;
    }
    wait_ms(100);


    BMI160::AccConfig accConfig;
    //example of using getSensorConfig
    if(imu.getSensorConfig(accConfig) == BMI160::RTN_NO_ERROR)
    {
        pc.printf("ACC Range = %d\r\n", accConfig.range);
        pc.printf("ACC UnderSampling = %d\r\n", accConfig.us);
        pc.printf("ACC BandWidthParam = %d\r\n", accConfig.bwp);
        pc.printf("ACC OutputDataRate = %d\r\n\r\n", accConfig.odr);
    }
    else
    {
        pc.printf("Failed to get accelerometer configuration\r\n");
        failures++;
    }

    //example of setting user defined configuration
    accConfig.range = BMI160::SENS_2G;  //rage is 2g
    accConfig.us = BMI160::ACC_US_OFF;  //undersampling is off 
    accConfig.bwp = BMI160::ACC_BWP_0;  //average 4 cycles
    accConfig.odr = BMI160::ACC_ODR_9;  //output data rate
    if(imu.setSensorConfig(accConfig) == BMI160::RTN_NO_ERROR)
    {
        pc.printf("ACC Range = %d\r\n", accConfig.range);
        pc.printf("ACC UnderSampling = %d\r\n", accConfig.us);
        pc.printf("ACC BandWidthParam = %d\r\n", accConfig.bwp);
        pc.printf("ACC OutputDataRate = %d\r\n\r\n", accConfig.odr);
    }
    else
    {
        pc.printf("Failed to set accelerometer configuration\r\n");
        failures++;
    }

    BMI160::GyroConfig gyroConfig;
    if(imu.getSensorConfig(gyroConfig) == BMI160::RTN_NO_ERROR)
    {
        pc.printf("GYRO Range = %d\r\n", gyroConfig.range);
        pc.printf("GYRO BandWidthParam = %d\r\n", gyroConfig.bwp);
        pc.printf("GYRO OutputDataRate = %d\r\n\r\n", gyroConfig.odr);
        
        
    }
    else
    {
        pc.printf("Failed to get gyroscope configuration\r\n");
        failures++;
    }

    wait(1.0);
    pc.printf("\033[H");  //home
    pc.printf("\033[0J");  //erase from cursor to end of screen

    if(failures == 0)
    {
        
        
        float imuTemperature;
        float dutyCycle;
        
        double xDeviation, yDeviation, zDeviation;
        double prevGyroX, prevGyroY, prevGyroZ;
        double currentGyroX, currentGyroY, currentGyroZ;
        double diffGyroX, diffGyroY, diffGyroZ;
        
        double xDisplacement, yDisplacement, zDisplacement;
        double currentAccX, currentAccY, currentAccZ;
        double prevAccX, prevAccY, prevAccZ;
        double diffAccX, diffAccY, diffAccZ;
        
        double xVelocity, yVelocity, zVelocity;
        double timeDiff, time_1, time_2;
        bool timeFlag = false;
        BMI160::SensorData accData;
        BMI160::SensorData gyroData;
        BMI160::SensorTime sensorTime;
        
        //PwmPin = 1;
        float apitch = 0;
        float k = 0.6;
        
        time_1 = sensorTime.seconds;
        while(1)
        {
            
            imu.getGyroAccXYZandSensorTime(accData, gyroData, sensorTime, accConfig.range, gyroConfig.range);
            imu.getTemperature(&imuTemperature);
            
            time_2 = sensorTime.seconds;
            apitch = compFilter(k, apitch, gyroData.xAxis.scaled, accData.yAxis.scaled, accData.zAxis.scaled, time_2 - time_1);
            pc.printf("Drift: %s%4.3f\r\n", "\033[K", apitch);
          
            
            //dutyCycle = (apitch * (0.2 / 10)) + 0.8;
          //  dutyCycle = fabsf(dutyCycle);
          //  pc.printf("PWM: %s%4.3f\r\n", "\033[K", dutyCycle);
            
              time_1 = time_2;
        /*    
            if(dutyCycle < 0 ){
                dutyCycle = 0 - dutyCycle;
            }
         */   
            if(apitch <= 0){
                PWM = 0.5;
                Dir = 1;    
            }
            
            if(apitch > 0){
                PWM = 0.5;
                Dir = 0;    
            }
            
             //printRegister(imu, BMI160::GYR_CONF);
             
       }
    }
}     
             
/*             
            if(timeFlag == true){
                
                currentGyroX = gyroData.xAxis.scaled;
                currentAccX = accData.xAxis.scaled;

                
                diffGyroX = abs(currentGyroX - prevGyroX);
                diffAccX = abs(currentAccX - prevAccX);
                
                time_2 = sensorTime.seconds;
                timeDiff = time_2 - time_1;
    
                if (diffGyroX > 2){
                    xDeviation = xDeviation + (gyroData.xAxis.scaled * (timeDiff)); 
                }  
                if (diffAccX > 0.009){
                    xDisplacement = (xVelocity * timeDiff) + (0.5 * accData.xAxis.scaled * timeDiff * timeDiff);
                    xVelocity = xVelocity + (accData.xAxis.scaled * timeDiff);
                }
        
               // pc.printf("%s%4.3f\r\n", "\033[K", xDeviation);
                
                //control motor for proportional linearity
                
                    if(xDeviation < 0.0)
                {
                    M_1 = 0;
                    M_2 = 1;
                    daplink.printf("Forward: %s%4.3f\r\n", "\033[K", xDeviation);
                }
                    else{
                    M_1 = 1;
                    M_2 = 0;
                    daplink.printf("Backward: %s%4.3f\r\n", "\033[K", xDeviation);
                }
                
                //------------------------
                
                
                //pc.printf("Velocity: %s%4.3f\r\n", "\033[K", prevAccX);
               // pc.printf("Interval: %s%4.3f\r\n", "\033[K", timeDiff);
                //pc.printf("%s%4.3f\r\n\r\n", "\033[K", xDisplacement);

                prevGyroX = currentGyroX;
                prevAccX = currentAccX;
                time_1 = time_2;
            }
            else{
                time_1 = sensorTime.seconds;
                timeFlag = true;
            }
        
            
            gLED = !gLED;
            wait_ms(1);
        }
    }
    else
    {
        while(1)
        {
            rLED = !rLED;
            wait(0.6);
        }
    }
*/




//*****************************************************************************
void dumpImuRegisters(BMI160 &imu)
{
    printRegister(imu, BMI160::CHIP_ID);
    printBlock(imu, BMI160::ERR_REG,BMI160::FIFO_DATA);
    printBlock(imu, BMI160::ACC_CONF, BMI160::FIFO_CONFIG_1);
    printBlock(imu, BMI160::MAG_IF_0, BMI160::SELF_TEST);
    printBlock(imu, BMI160::NV_CONF, BMI160::STEP_CONF_1);
    printRegister(imu, BMI160::CMD);
    pc.printf("\r\n");
}


//*****************************************************************************
void printRegister(BMI160 &imu, BMI160::Registers reg)
{
    uint8_t data;
    if(imu.readRegister(reg, &data) == BMI160::RTN_NO_ERROR)
    {
        pc.printf("IMU Register 0x%02x = 0x%02x\r\n", reg, data);
         daplink.printf("IMU Register 0x%02x = 0x%02x\r\n", reg, data);
    }
    else
    {
        pc.printf("Failed to read register\r\n");
    }
}

//*****************************************************************************
void writeReg(BMI160 &imu, BMI160::Registers reg, uint8_t data)
{
    imu.writeRegister(reg, data);
    
    
}


//*****************************************************************************
void printBlock(BMI160 &imu, BMI160::Registers startReg, BMI160::Registers stopReg)
{
    uint8_t numBytes = ((stopReg - startReg) + 1);
    uint8_t buff[32];
    uint8_t offset = static_cast<uint8_t>(startReg);

    if(imu.readBlock(startReg, stopReg, buff) == BMI160::RTN_NO_ERROR)
    {
        for(uint8_t idx = offset; idx < (numBytes + offset); idx++)
        {
            pc.printf("IMU Register 0x%02x = 0x%02x\r\n", idx, buff[idx - offset]);
        }
    }
    else
    {
        pc.printf("Failed to read block\r\n");
    }
}


/* An example for configuring FOC for accel and gyro data */