Iván Arias
/
MPU9150AHRS
MPU9150AHRS adapted to a lpc1768 uC
Revision 1:1939413ddfd0, committed 2019-04-08
- Comitter:
- ivaariasga
- Date:
- Mon Apr 08 20:53:57 2019 +0000
- Parent:
- 0:39935bb3c1a1
- Commit message:
- MPU9150, With madgwick algorithm working in a lpc1768 uC displaying via serial pc.
Changed in this revision
--- a/MPU9150.h Sun Jun 29 22:48:08 2014 +0000 +++ b/MPU9150.h Mon Apr 08 20:53:57 2019 +0000 @@ -190,7 +190,7 @@ float SelfTest[6]; int delt_t = 0; // used to control display output rate -int count = 0; // used to control display output rate +int cont = 0; // used to control display output rate // parameters for 6 DoF sensor fusion calculations float PI = 3.14159265358979323846f;
--- a/N5110.lib Sun Jun 29 22:48:08 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -http://mbed.org/users/onehorse/code/Adfs/#28c629d0b0d0
--- a/ST_401_84MHZ.lib Sun Jun 29 22:48:08 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -http://mbed.org/users/dreschpe/code/ST_401_84MHZ/#b9343c8b85ec
--- a/main.cpp Sun Jun 29 22:48:08 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,253 +0,0 @@ -/* MPU9150 Basic Example Code - by: Kris Winer - date: April 1, 2014 - license: Beerware - Use this code however you'd like. If you - find it useful you can buy me a beer some time. - - Demonstrate basic MPU-9150 functionality including parameterizing the register addresses, initializing the sensor, - getting properly scaled accelerometer, gyroscope, and magnetometer data out. Added display functions to - allow display to on breadboard monitor. Addition of 9 DoF sensor fusion using open source Madgwick and - Mahony filter algorithms. Sketch runs on the 3.3 V 8 MHz Pro Mini and the Teensy 3.1. - - SDA and SCL should have external pull-up resistors (to 3.3V). - 10k resistors are on the EMSENSR-9250 breakout board. - - Hardware setup: - MPU9150 Breakout --------- Arduino - VDD ---------------------- 3.3V - VDDI --------------------- 3.3V - SDA ----------------------- A4 - SCL ----------------------- A5 - GND ---------------------- GND - - Note: The MPU9150 is an I2C sensor and uses the Arduino Wire library. - Because the sensor is not 5V tolerant, we are using a 3.3 V 8 MHz Pro Mini or a 3.3 V Teensy 3.1. - We have disabled the internal pull-ups used by the Wire library in the Wire.h/twi.c utility file. - We are also using the 400 kHz fast I2C mode by setting the TWI_FREQ to 400000L /twi.h utility file. - */ - -//#include "ST_F401_84MHZ.h" -//F401_init84 myinit(0); -#include "mbed.h" -#include "MPU9150.h" -#include "N5110.h" - -// Using NOKIA 5110 monochrome 84 x 48 pixel display -// pin 9 - Serial clock out (SCLK) -// pin 8 - Serial data out (DIN) -// pin 7 - Data/Command select (D/C) -// pin 5 - LCD chip select (CS) -// pin 6 - LCD reset (RST) -//Adafruit_PCD8544 display = Adafruit_PCD8544(9, 8, 7, 5, 6); - -float sum = 0; -uint32_t sumCount = 0, mcount = 0; -char buffer[14]; - - MPU9150 MPU9150; - - Timer t; - - Serial pc(USBTX, USBRX); // tx, rx - - // VCC, SCE, RST, D/C, MOSI,S CLK, LED - N5110 lcd(PA_8, PB_10, PA_9, PA_6, PA_7, PA_5, PC_7); - - - -int main() -{ - pc.baud(9600); - - //Set up I2C - i2c.frequency(400000); // use fast (400 kHz) I2C - - pc.printf("CPU SystemCoreClock is %d Hz\r\n", SystemCoreClock); - - t.start(); - - lcd.init(); -// lcd.setBrightness(0.05); - - - // Read the WHO_AM_I register, this is a good test of communication - uint8_t whoami = MPU9150.readByte(MPU9150_ADDRESS, WHO_AM_I_MPU9150); // Read WHO_AM_I register for MPU-9250 - pc.printf("I AM 0x%x\n\r", whoami); pc.printf("I SHOULD BE 0x68\n\r"); - - if (whoami == 0x68) // WHO_AM_I should be 0x68 - { - pc.printf("MPU9150 WHO_AM_I is 0x%x\n\r", whoami); - pc.printf("MPU9150 is online...\n\r"); - lcd.clear(); - lcd.printString("MPU9150 is", 0, 0); - sprintf(buffer, "0x%x", whoami); - lcd.printString(buffer, 0, 1); - lcd.printString("shoud be 0x68", 0, 2); - wait(1); - - MPU9150.MPU9150SelfTest(SelfTest); - pc.printf("x-axis self test: acceleration trim within %f % of factory value\n\r", SelfTest[0]); - pc.printf("y-axis self test: acceleration trim within %f % of factory value\n\r", SelfTest[1]); - pc.printf("z-axis self test: acceleration trim within %f % of factory value\n\r", SelfTest[2]); - pc.printf("x-axis self test: gyration trim within %f % of factory value\n\r", SelfTest[3]); - pc.printf("y-axis self test: gyration trim within %f % of factory value\n\r", SelfTest[4]); - pc.printf("z-axis self test: gyration trim within %f % of factory value\n\r", SelfTest[5]); - wait(1); - MPU9150.resetMPU9150(); // Reset registers to default in preparation for device calibration - MPU9150.calibrateMPU9150(gyroBias, accelBias); // Calibrate gyro and accelerometers, load biases in bias registers - pc.printf("x gyro bias = %f\n\r", gyroBias[0]); - pc.printf("y gyro bias = %f\n\r", gyroBias[1]); - pc.printf("z gyro bias = %f\n\r", gyroBias[2]); - pc.printf("x accel bias = %f\n\r", accelBias[0]); - pc.printf("y accel bias = %f\n\r", accelBias[1]); - pc.printf("z accel bias = %f\n\r", accelBias[2]); - wait(1); - MPU9150.initMPU9150(); - pc.printf("MPU9150 initialized for active data mode....\n\r"); // Initialize device for active mode read of acclerometer, gyroscope, and temperature - MPU9150.initAK8975A(magCalibration); - pc.printf("AK8975 initialized for active data mode....\n\r"); // Initialize device for active mode read of magnetometer - } - else - { - pc.printf("Could not connect to MPU9150: \n\r"); - pc.printf("%#x \n", whoami); - - lcd.clear(); - lcd.printString("MPU9150", 0, 0); - lcd.printString("no connection", 0, 1); - sprintf(buffer, "WHO_AM_I 0x%x", whoami); - lcd.printString(buffer, 0, 2); - - while(1) ; // Loop forever if communication doesn't happen - } - - uint8_t MagRate = 10; // set magnetometer read rate in Hz; 10 to 100 (max) Hz are reasonable values - MPU9150.getAres(); // Get accelerometer sensitivity - MPU9150.getGres(); // Get gyro sensitivity - mRes = 10.*1229./4096.; // Conversion from 1229 microTesla full scale (4096) to 12.29 Gauss full scale - // So far, magnetometer bias is calculated and subtracted here manually, should construct an algorithm to do it automatically - // like the gyro and accelerometer biases - magbias[0] = -5.; // User environmental x-axis correction in milliGauss - magbias[1] = -95.; // User environmental y-axis correction in milliGauss - magbias[2] = -260.; // User environmental z-axis correction in milliGauss - - - while(1) { - - // If intPin goes high, all data registers have new data - if(MPU9150.readByte(MPU9150_ADDRESS, INT_STATUS) & 0x01) { // On interrupt, check if data ready interrupt - - MPU9150.readAccelData(accelCount); // Read the x/y/z adc values - // Now we'll calculate the accleration value into actual g's - ax = (float)accelCount[0]*aRes; // - accelBias[0]; // get actual g value, this depends on scale being set - ay = (float)accelCount[1]*aRes; // - accelBias[1]; - az = (float)accelCount[2]*aRes; // - accelBias[2]; - - MPU9150.readGyroData(gyroCount); // Read the x/y/z adc values - // Calculate the gyro value into actual degrees per second - gx = (float)gyroCount[0]*gRes; // - gyroBias[0]; // get actual gyro value, this depends on scale being set - gy = (float)gyroCount[1]*gRes; // - gyroBias[1]; - gz = (float)gyroCount[2]*gRes; // - gyroBias[2]; - - mcount++; - if (mcount > 200/MagRate) { // this is a poor man's way of setting the magnetometer read rate (see below) - MPU9150.readMagData(magCount); // Read the x/y/z adc values - // Calculate the magnetometer values in milliGauss - // Include factory calibration per data sheet and user environmental corrections - mx = (float)magCount[0]*mRes*magCalibration[0] - magbias[0]; // get actual magnetometer value, this depends on scale being set - my = (float)magCount[1]*mRes*magCalibration[1] - magbias[1]; - mz = (float)magCount[2]*mRes*magCalibration[2] - magbias[2]; - mcount = 0; - } - } - - Now = t.read_us(); - deltat = (float)((Now - lastUpdate)/1000000.0f) ; // set integration time by time elapsed since last filter update - lastUpdate = Now; - - sum += deltat; - sumCount++; - -// if(lastUpdate - firstUpdate > 10000000.0f) { -// beta = 0.04; // decrease filter gain after stabilized -// zeta = 0.015; // increasey bias drift gain after stabilized - // } - - // Pass gyro rate as rad/s -// MPU9150.MadgwickQuaternionUpdate(ax, ay, az, gx*PI/180.0f, gy*PI/180.0f, gz*PI/180.0f, my, mx, mz); - MPU9150.MahonyQuaternionUpdate(ax, ay, az, gx*PI/180.0f, gy*PI/180.0f, gz*PI/180.0f, my, mx, mz); - - // Serial print and/or display at 0.5 s rate independent of data rates - delt_t = t.read_ms() - count; - if (delt_t > 500) { // update LCD once per half-second independent of read rate - - pc.printf("ax = %f", 1000*ax); - pc.printf(" ay = %f", 1000*ay); - pc.printf(" az = %f mg\n\r", 1000*az); - - pc.printf("gx = %f", gx); - pc.printf(" gy = %f", gy); - pc.printf(" gz = %f deg/s\n\r", gz); - - pc.printf("gx = %f", mx); - pc.printf(" gy = %f", my); - pc.printf(" gz = %f mG\n\r", mz); - - tempCount = MPU9150.readTempData(); // Read the adc values - temperature = ((float) tempCount) / 340.0f + 36.53f; // Temperature in degrees Centigrade - pc.printf(" temperature = %f C\n\r", temperature); - - pc.printf("q0 = %f\n\r", q[0]); - pc.printf("q1 = %f\n\r", q[1]); - pc.printf("q2 = %f\n\r", q[2]); - pc.printf("q3 = %f\n\r", q[3]); - -/* lcd.clear(); - lcd.printString("MPU9150", 0, 0); - lcd.printString("x y z", 0, 1); - sprintf(buffer, "%d %d %d mg", (int)(1000.0f*ax), (int)(1000.0f*ay), (int)(1000.0f*az)); - lcd.printString(buffer, 0, 2); - sprintf(buffer, "%d %d %d deg/s", (int)gx, (int)gy, (int)gz); - lcd.printString(buffer, 0, 3); - sprintf(buffer, "%d %d %d mG", (int)mx, (int)my, (int)mz); - lcd.printString(buffer, 0, 4); - */ - // Define output variables from updated quaternion---these are Tait-Bryan angles, commonly used in aircraft orientation. - // In this coordinate system, the positive z-axis is down toward Earth. - // Yaw is the angle between Sensor x-axis and Earth magnetic North (or true North if corrected for local declination, looking down on the sensor positive yaw is counterclockwise. - // Pitch is angle between sensor x-axis and Earth ground plane, toward the Earth is positive, up toward the sky is negative. - // Roll is angle between sensor y-axis and Earth ground plane, y-axis up is positive roll. - // These arise from the definition of the homogeneous rotation matrix constructed from quaternions. - // Tait-Bryan angles as well as Euler angles are non-commutative; that is, the get the correct orientation the rotations must be - // applied in the correct order which for this configuration is yaw, pitch, and then roll. - // For more see http://en.wikipedia.org/wiki/Conversion_between_quaternions_and_Euler_angles which has additional links. - yaw = atan2(2.0f * (q[1] * q[2] + q[0] * q[3]), q[0] * q[0] + q[1] * q[1] - q[2] * q[2] - q[3] * q[3]); - pitch = -asin(2.0f * (q[1] * q[3] - q[0] * q[2])); - roll = atan2(2.0f * (q[0] * q[1] + q[2] * q[3]), q[0] * q[0] - q[1] * q[1] - q[2] * q[2] + q[3] * q[3]); - pitch *= 180.0f / PI; - yaw *= 180.0f / PI; - yaw -= 13.8f; // Declination at Danville, California is 13 degrees 48 minutes and 47 seconds on 2014-04-04 - roll *= 180.0f / PI; - - pc.printf("Yaw, Pitch, Roll: %f %f %f\n\r", yaw, pitch, roll); - pc.printf("average rate = %f\n\r", (float) sumCount/sum); -// sprintf(buffer, "YPR: %f %f %f", yaw, pitch, roll); -// lcd.printString(buffer, 0, 4); -// sprintf(buffer, "rate = %f", (float) sumCount/sum); -// lcd.printString(buffer, 0, 5); - - myled= !myled; - count = t.read_ms(); - - if(count > 1<<21) { - t.start(); // start the timer over again if ~30 minutes has passed - count = 0; - deltat= 0; - lastUpdate = t.read_us(); - } - sum = 0; - sumCount = 0; -} -} - - } \ No newline at end of file
--- a/mbed.bld Sun Jun 29 22:48:08 2014 +0000 +++ b/mbed.bld Mon Apr 08 20:53:57 2019 +0000 @@ -1,1 +1,1 @@ -http://mbed.org/users/mbed_official/code/mbed/builds/0b3ab51c8877 \ No newline at end of file +https://os.mbed.com/users/mbed_official/code/mbed/builds/65be27845400 \ No newline at end of file