4180 IMU parts (I2C, uLCD, RS232, USB Serial, SD)
Dependencies: 4DGL-uLCD-SE LSM9DS1_Library_cal SDFileSystem mbed
main.cpp@2:f17a67920767, 2016-02-12 (annotated)
- Committer:
- mikeb
- Date:
- Fri Feb 12 16:25:04 2016 +0000
- Revision:
- 2:f17a67920767
- Parent:
- 1:6c4ba07e0c77
Added SDFile System, all untested
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mikeb | 0:2fd46a8b3964 | 1 | #include "mbed.h" |
mikeb | 0:2fd46a8b3964 | 2 | #include "LSM9DS1.h" |
mikeb | 1:6c4ba07e0c77 | 3 | #include "uLCD_4DGL.h" |
mikeb | 2:f17a67920767 | 4 | #include "SDFileSystem.h" |
mikeb | 0:2fd46a8b3964 | 5 | #define PI 3.14159 |
mikeb | 0:2fd46a8b3964 | 6 | // Earth's magnetic field varies by location. Add or subtract |
mikeb | 0:2fd46a8b3964 | 7 | // a declination to get a more accurate heading. Calculate |
mikeb | 0:2fd46a8b3964 | 8 | // your's here: |
mikeb | 0:2fd46a8b3964 | 9 | // http://www.ngdc.noaa.gov/geomag-web/#declination |
mikeb | 0:2fd46a8b3964 | 10 | #define DECLINATION -4.94 // Declination (degrees) in Atlanta,GA. |
mikeb | 0:2fd46a8b3964 | 11 | |
mikeb | 0:2fd46a8b3964 | 12 | DigitalOut myled(LED1); |
mikeb | 0:2fd46a8b3964 | 13 | DigitalIn sel(p21); |
mikeb | 0:2fd46a8b3964 | 14 | Serial pc(USBTX, USBRX); |
mikeb | 0:2fd46a8b3964 | 15 | Serial device(p13, p14); |
mikeb | 1:6c4ba07e0c77 | 16 | uLCD_4DGL uLCD(p27,p28,p30); // serial tx, serial rx, reset pin; |
mikeb | 2:f17a67920767 | 17 | SDFileSystem sd(p5, p6, p7, p8, "sd"); |
mikeb | 2:f17a67920767 | 18 | //Global variables. Whatever. Sue me. |
mikeb | 2:f17a67920767 | 19 | float oldx = 0; |
mikeb | 2:f17a67920767 | 20 | float oldy = 0; |
mikeb | 0:2fd46a8b3964 | 21 | |
mikeb | 0:2fd46a8b3964 | 22 | |
mikeb | 0:2fd46a8b3964 | 23 | // Calculate pitch, roll, and heading. |
mikeb | 0:2fd46a8b3964 | 24 | // Pitch/roll calculations taken from this app note: |
mikeb | 0:2fd46a8b3964 | 25 | // http://cache.freescale.com/files/sensors/doc/app_note/AN3461.pdf?fpsp=1 |
mikeb | 0:2fd46a8b3964 | 26 | // Heading calculations taken from this app note: |
mikeb | 0:2fd46a8b3964 | 27 | // http://www51.honeywell.com/aero/common/documents/myaerospacecatalog-documents/Defense_Brochures-documents/Magnetic__Literature_Application_notes-documents/AN203_Compass_Heading_Using_Magnetometers.pdf |
mikeb | 0:2fd46a8b3964 | 28 | void printAttitude(float ax, float ay, float az, float mx, float my, float mz) |
mikeb | 0:2fd46a8b3964 | 29 | { |
mikeb | 0:2fd46a8b3964 | 30 | float roll = atan2(ay, az); |
mikeb | 0:2fd46a8b3964 | 31 | float pitch = atan2(-ax, sqrt(ay * ay + az * az)); |
mikeb | 0:2fd46a8b3964 | 32 | // touchy trig stuff to use arctan to get compass heading (scale is 0..360) |
mikeb | 0:2fd46a8b3964 | 33 | mx = -mx; |
mikeb | 0:2fd46a8b3964 | 34 | float heading; |
mikeb | 0:2fd46a8b3964 | 35 | if (my == 0.0) |
mikeb | 0:2fd46a8b3964 | 36 | heading = (mx < 0.0) ? 180.0 : 0.0; |
mikeb | 0:2fd46a8b3964 | 37 | else |
mikeb | 0:2fd46a8b3964 | 38 | heading = atan2(mx, my)*360.0/(2.0*PI); |
mikeb | 0:2fd46a8b3964 | 39 | //pc.printf("heading atan=%f \n\r",heading); |
mikeb | 0:2fd46a8b3964 | 40 | heading -= DECLINATION; //correct for geo location |
mikeb | 0:2fd46a8b3964 | 41 | if(heading>180.0) heading = heading - 360.0; |
mikeb | 0:2fd46a8b3964 | 42 | else if(heading<-180.0) heading = 360.0 + heading; |
mikeb | 0:2fd46a8b3964 | 43 | else if(heading<0.0) heading = 360.0 + heading; |
mikeb | 0:2fd46a8b3964 | 44 | |
mikeb | 0:2fd46a8b3964 | 45 | |
mikeb | 0:2fd46a8b3964 | 46 | // Convert everything from radians to degrees: |
mikeb | 0:2fd46a8b3964 | 47 | //heading *= 180.0 / PI; |
mikeb | 0:2fd46a8b3964 | 48 | pitch *= 180.0 / PI; |
mikeb | 0:2fd46a8b3964 | 49 | roll *= 180.0 / PI; |
mikeb | 0:2fd46a8b3964 | 50 | if (sel){ |
mikeb | 0:2fd46a8b3964 | 51 | pc.printf("Pitch: %f, Roll: %f degress\n\r",pitch,roll); |
mikeb | 0:2fd46a8b3964 | 52 | pc.printf("Magnetic Heading: %f degress\n\r",heading); |
mikeb | 0:2fd46a8b3964 | 53 | } |
mikeb | 0:2fd46a8b3964 | 54 | else{ |
mikeb | 0:2fd46a8b3964 | 55 | device.printf("Pitch: %f, Roll: %f degress\n\r",pitch,roll); |
mikeb | 0:2fd46a8b3964 | 56 | device.printf("Magnetic Heading: %f degress\n\r",heading); |
mikeb | 0:2fd46a8b3964 | 57 | } |
mikeb | 0:2fd46a8b3964 | 58 | |
mikeb | 0:2fd46a8b3964 | 59 | } |
mikeb | 0:2fd46a8b3964 | 60 | |
mikeb | 1:6c4ba07e0c77 | 61 | void bubLev(float ax, float ay, float az, float oldx, float oldy){ |
mikeb | 2:f17a67920767 | 62 | uLCD.filled_circle(oldx, oldy, 5, BLACK); |
mikeb | 2:f17a67920767 | 63 | uLCD.filled_circle(floor(-ax/az*40.0)+63, floor(-ay/az*40.0)+63, 5, 0xFF00FF); |
mikeb | 2:f17a67920767 | 64 | oldx = floor(ax/az*40)+63; |
mikeb | 2:f17a67920767 | 65 | oldy = floor(ay/az*40)+63; |
mikeb | 1:6c4ba07e0c77 | 66 | } |
mikeb | 1:6c4ba07e0c77 | 67 | |
mikeb | 0:2fd46a8b3964 | 68 | |
mikeb | 0:2fd46a8b3964 | 69 | |
mikeb | 0:2fd46a8b3964 | 70 | |
mikeb | 0:2fd46a8b3964 | 71 | int main() |
mikeb | 0:2fd46a8b3964 | 72 | { |
mikeb | 0:2fd46a8b3964 | 73 | //device.baud(19200); |
mikeb | 0:2fd46a8b3964 | 74 | //device.format(8N1); |
mikeb | 2:f17a67920767 | 75 | |
mikeb | 2:f17a67920767 | 76 | mkdir("/sd/mydir", 0777); |
mikeb | 2:f17a67920767 | 77 | FILE *fp = fopen("/sd/mydir/sdtest.txt", "w"); |
mikeb | 2:f17a67920767 | 78 | if(fp == NULL) { |
mikeb | 2:f17a67920767 | 79 | error("Could not open file for write\n"); |
mikeb | 2:f17a67920767 | 80 | } |
mikeb | 2:f17a67920767 | 81 | fprintf(fp, "Hello SD File World!\n Mike and Gedeon Lab 2.\n"); |
mikeb | 2:f17a67920767 | 82 | fclose(fp); |
mikeb | 2:f17a67920767 | 83 | |
mikeb | 2:f17a67920767 | 84 | char myString [100]; |
mikeb | 2:f17a67920767 | 85 | |
mikeb | 2:f17a67920767 | 86 | FILE *fr = fopen("/sd/mydir/sdtest.txt", "r"); |
mikeb | 2:f17a67920767 | 87 | if (fgets(myString, 100, fr) != NULL){ |
mikeb | 2:f17a67920767 | 88 | pc.printf("%s\n", myString); |
mikeb | 2:f17a67920767 | 89 | } |
mikeb | 2:f17a67920767 | 90 | fclose(fr); |
mikeb | 2:f17a67920767 | 91 | wait(2); |
mikeb | 2:f17a67920767 | 92 | |
mikeb | 0:2fd46a8b3964 | 93 | LSM9DS1 IMU(p9, p10, 0xD6, 0x3C); |
mikeb | 0:2fd46a8b3964 | 94 | sel.mode(PullUp); |
mikeb | 1:6c4ba07e0c77 | 95 | uLCD.baudrate(3000000); |
mikeb | 0:2fd46a8b3964 | 96 | IMU.begin(); |
mikeb | 0:2fd46a8b3964 | 97 | if (!IMU.begin()) { |
mikeb | 0:2fd46a8b3964 | 98 | pc.printf("Failed to communicate with LSM9DS1.\n"); |
mikeb | 0:2fd46a8b3964 | 99 | } |
mikeb | 0:2fd46a8b3964 | 100 | IMU.calibrate(1); |
mikeb | 0:2fd46a8b3964 | 101 | IMU.calibrateMag(0); |
mikeb | 2:f17a67920767 | 102 | uLCD.filled_circle(63, 63, 40, 0x0000FF); |
mikeb | 0:2fd46a8b3964 | 103 | while(1) { |
mikeb | 0:2fd46a8b3964 | 104 | while(!IMU.tempAvailable()); |
mikeb | 0:2fd46a8b3964 | 105 | IMU.readTemp(); |
mikeb | 0:2fd46a8b3964 | 106 | while(!IMU.magAvailable(X_AXIS)); |
mikeb | 0:2fd46a8b3964 | 107 | IMU.readMag(); |
mikeb | 0:2fd46a8b3964 | 108 | while(!IMU.accelAvailable()); |
mikeb | 0:2fd46a8b3964 | 109 | IMU.readAccel(); |
mikeb | 0:2fd46a8b3964 | 110 | while(!IMU.gyroAvailable()); |
mikeb | 0:2fd46a8b3964 | 111 | IMU.readGyro(); |
mikeb | 0:2fd46a8b3964 | 112 | if (sel){ |
mikeb | 0:2fd46a8b3964 | 113 | pc.printf("\nIMU Temperature = %f C\n\r",25.0 + IMU.temperature/16.0); |
mikeb | 0:2fd46a8b3964 | 114 | pc.printf(" X axis Y axis Z axis\n\r"); |
mikeb | 0:2fd46a8b3964 | 115 | pc.printf("gyro: %9f %9f %9f in deg/s\n\r", IMU.calcGyro(IMU.gx), IMU.calcGyro(IMU.gy), IMU.calcGyro(IMU.gz)); |
mikeb | 0:2fd46a8b3964 | 116 | pc.printf("accel: %9f %9f %9f in Gs\n\r", IMU.calcAccel(IMU.ax), IMU.calcAccel(IMU.ay), IMU.calcAccel(IMU.az)); |
mikeb | 0:2fd46a8b3964 | 117 | pc.printf("mag: %9f %9f %9f in gauss\n\r", IMU.calcMag(IMU.mx), IMU.calcMag(IMU.my), IMU.calcMag(IMU.mz)); |
mikeb | 0:2fd46a8b3964 | 118 | printAttitude(IMU.calcAccel(IMU.ax), IMU.calcAccel(IMU.ay), IMU.calcAccel(IMU.az), IMU.calcMag(IMU.mx), |
mikeb | 0:2fd46a8b3964 | 119 | IMU.calcMag(IMU.my), IMU.calcMag(IMU.mz)); |
mikeb | 0:2fd46a8b3964 | 120 | } |
mikeb | 0:2fd46a8b3964 | 121 | else{ |
mikeb | 0:2fd46a8b3964 | 122 | device.printf("\nIMU Temperature = %f C\n\r",25.0 + IMU.temperature/16.0); |
mikeb | 0:2fd46a8b3964 | 123 | device.printf(" X axis Y axis Z axis\n\r"); |
mikeb | 0:2fd46a8b3964 | 124 | device.printf("gyro: %9f %9f %9f in deg/s\n\r", IMU.calcGyro(IMU.gx), IMU.calcGyro(IMU.gy), IMU.calcGyro(IMU.gz)); |
mikeb | 0:2fd46a8b3964 | 125 | device.printf("accel: %9f %9f %9f in Gs\n\r", IMU.calcAccel(IMU.ax), IMU.calcAccel(IMU.ay), IMU.calcAccel(IMU.az)); |
mikeb | 0:2fd46a8b3964 | 126 | device.printf("mag: %9f %9f %9f in gauss\n\r", IMU.calcMag(IMU.mx), IMU.calcMag(IMU.my), IMU.calcMag(IMU.mz)); |
mikeb | 0:2fd46a8b3964 | 127 | printAttitude(IMU.calcAccel(IMU.ax), IMU.calcAccel(IMU.ay), IMU.calcAccel(IMU.az), IMU.calcMag(IMU.mx), |
mikeb | 0:2fd46a8b3964 | 128 | IMU.calcMag(IMU.my), IMU.calcMag(IMU.mz)); |
mikeb | 0:2fd46a8b3964 | 129 | } |
mikeb | 2:f17a67920767 | 130 | |
mikeb | 2:f17a67920767 | 131 | bubLev(IMU.calcAccel(IMU.ax), IMU.calcAccel(IMU.ay), IMU.calcAccel(IMU.az), oldx, oldy); |
mikeb | 0:2fd46a8b3964 | 132 | myled = 1; |
mikeb | 0:2fd46a8b3964 | 133 | wait(0.5); |
mikeb | 0:2fd46a8b3964 | 134 | myled = 0; |
mikeb | 0:2fd46a8b3964 | 135 | wait(0.5); |
mikeb | 0:2fd46a8b3964 | 136 | } |
mikeb | 0:2fd46a8b3964 | 137 | } |