Revision 0:0d977b83a68d, committed 2016-03-15

Comitter:

nsloth

Date:

Tue Mar 15 21:27:30 2016 +0000

Commit message:

Final Submission for ECE4180 Lab 4

Changed in this revision

diff -r 000000000000 -r 0d977b83a68d LSM9DS1_Library_cal.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LSM9DS1_Library_cal.lib	Tue Mar 15 21:27:30 2016 +0000
@@ -0,0 +1,1 @@
+https://developer.mbed.org/users/4180_1/code/LSM9DS1_Library_cal/#36abf8e18ade

diff -r 000000000000 -r 0d977b83a68d PinDetect.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PinDetect.lib	Tue Mar 15 21:27:30 2016 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/AjK/code/PinDetect/#cb3afc45028b

diff -r 000000000000 -r 0d977b83a68d main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Mar 15 21:27:30 2016 +0000
@@ -0,0 +1,207 @@
+#include "mbed.h"
+#include "rtos.h"
+#include "mpr121.h"
+#include "PinDetect.h"
+#include "LSM9DS1.h"
+
+// Sound waveform synthesizer
+// The program precomputes 128 data points on one wave cycle 
+// for triangular, sawtooth, and sine waves. These are stored 
+// and outout to the PWM to vary the PWM duty cycle. A very high 
+// PWM frequency is used and the frequency of the output soundwave 
+// is changed by changing the sampling rate. The program uses the 
+// IMU to shift frequencies, the keypad to choose center frequencies, 
+// the RGB LED to visually display pitch, and a pushbutton to switch between wave modes.
+
+#define PI 3.141592653589793238462
+
+InterruptIn irq(p11);
+I2C i2c1(p9,p10);
+Mpr121 touchpad(&i2c1, Mpr121::ADD_VSS); 
+PwmOut PWM(p26);
+Serial pc(USBTX,USBRX);
+LSM9DS1 IMU(p28, p27, 0xD6, 0x3C);
+Mutex stdio_mutex; 
+
+PwmOut RGBLED_r(p21);
+PwmOut RGBLED_g(p22);
+PwmOut RGBLED_b(p23);
+
+PinDetect pb1(p17);
+DigitalOut led1(LED1);
+DigitalOut led2(LED2);
+DigitalOut led3(LED3);
+DigitalOut led4(LED4);
+
+//Global variables used by interrupt routines and threads
+volatile int i=0;
+volatile int j=0;
+float sineInit[128];
+float sawInit[128];
+float triInit[128];
+volatile float baseFreq = 440;
+float maxDeltaFreq = 200;
+float maxDeltaXAxis = 15;
+volatile float freq = 900;
+volatile float deltaFreq = 0;
+volatile float deltaXAxis = 0;
+volatile float deltaXAxisOld = 0;          
+float frequencyScales[12] = {261.626, 293.665, 329.628, 349.228, 391.995, 440.0,
+                             493.883, 523.251, 587.33, 659.255, 783.991, 880};
+
+enum Waveforms {sine=0,sawTooth,triangle};
+Waveforms wave = sine;
+
+//Samples IMU every .5 seconds and adjusts frequencies accordingly
+void sample_IMU(void const *args)
+{
+    while(1) {
+        if(IMU.accelAvailable()) {
+            stdio_mutex.lock();
+            deltaXAxisOld = deltaXAxis;
+            deltaXAxis = (0.0024*IMU.readAccel(X_AXIS)); //Measures difference of IMU from base value of 0
+            stdio_mutex.unlock();
+        }
+        Thread::wait(500);
+    }
+}
+
+//Plays the current waveform at the current frequency
+void playSineWave() {
+    while(j<150) {  //Controls how many cycles. Plays about 3 full cycles
+        switch(wave) {
+            case sine:
+                PWM = (sineInit[i]);
+            break;
+            case sawTooth:
+                PWM = sawInit[i];
+            break;
+            case triangle:
+                PWM = triInit[i];
+            break;
+            default:
+                led2 = 0;
+                led3 = 0;
+                led4 = 0;
+            break;
+        }
+        //(1.0 + sin((float(i)*freq*6.28318530717959/(128.0))))/2.0);
+        // increment pointer and wrap around back to 0 at 128
+        if(i>60) {
+            j++;
+        }
+        i = (i+1) & 0x07F;
+        wait_us(1000000.0/((freq+deltaFreq)*128));
+    }
+    
+    //At the end of 3 cycles, reset counters
+    i=0;
+    j=0;
+    
+    int value=touchpad.read(0x00);
+    value +=touchpad.read(0x01)<<8;
+    if (value == 0) {
+        //Reset values if keypad is not being touched
+        PWM = 0;
+        deltaFreq = 0;
+        deltaXAxis = 0;
+        RGBLED_r = 0;
+        RGBLED_g = 0;
+        RGBLED_b = 0;
+    } else {
+        //If the keypad has a nonzero value, update the frequency and play more cycles
+        stdio_mutex.lock();
+        float diff = (abs(deltaXAxis - deltaXAxisOld) > 2) ? deltaXAxis : deltaXAxisOld; //Makes the delta frequency resistant to noise in the IMU
+        stdio_mutex.unlock();
+        
+        //Calculates delta frequency from center frequency based off of IMU accelerometer
+        if(abs(diff) > maxDeltaXAxis)
+            deltaFreq = maxDeltaFreq;
+        else {
+            deltaFreq = diff/maxDeltaXAxis*maxDeltaFreq;
+        }
+        
+        RGBLED_r = abs(freq-deltaFreq-220)/880;
+        RGBLED_g = abs(freq-220)/880;
+        RGBLED_b = abs(freq+deltaFreq-220)/880;;
+        playSineWave();
+    }
+}
+
+//Called when the touchpad is tapped
+void fallInterrupt() {
+    int key_code=0;
+    int n=0;
+    int value=touchpad.read(0x00);
+    value +=touchpad.read(0x01)<<8;
+    for (n=0; n<12; n++) {
+        if (((value>>n)&0x01)==1) {
+            key_code=n+1;
+        }
+    }
+    //sets frequency based on the tapped value
+    freq = frequencyScales[key_code-1];
+    if (value != 0) {
+        playSineWave();
+    }
+}
+
+//Switches the current waveform and leds
+void pb1_released_callback(void){
+    if (wave == triangle) {
+        led2 = 1;
+        led3 = 0;
+        led4 = 0;
+        wave = sine;
+    } else if (wave == sine) {
+        led2 = 0;
+        led3 = 1;
+        led4 = 0;
+        wave = sawTooth;
+    } else {
+        led2 = 0;
+        led3 = 0;
+        led4 = 1;
+        wave = triangle;
+    }
+}
+
+int main()
+{
+    pc.printf("Program starting.");
+    PWM.period(1.0/200000.0);
+    led2 = 1;
+    led3 = 0;
+    led4 = 0;
+    
+    // Precompute 128 sample points on one wave cycle for three wave forms
+    // used for continuous wave output later
+    for(int k=0; k<128; k++) {
+        sineInit[k] = 1.0*((1.0 + sin((float(k)/128.0*2*PI)))/2.0);
+        sawInit[k] = (1.0 + ((-2.0*1.0/PI)*atan(cos(float(k)*PI/128.0)/sin(float(k)*PI/128.0))))/2.0;
+        triInit[k] = (1.0 + ((2.0*1.0/PI)*asin(sin(2.0*PI*float(k)/128.0))))/2.0;
+        // scale the waves from 0.0 to 1.0 - as needed for AnalogOut arg 
+    }
+    
+    //Configure the IMU
+    IMU.begin();
+    if (!IMU.begin()) {
+        pc.printf("Failed to communicate with LSM9DS1.\n");
+    }
+    IMU.calibrate(1);
+    
+    //Configure the Push button
+    pb1.mode(PullUp);
+    wait(0.01);
+    pb1.attach_deasserted(&pb1_released_callback);
+    pb1.setSampleFrequency();
+    
+    //Set up the I2C Touch keypad interrupt
+    irq.fall(&fallInterrupt);
+    irq.mode(PullUp);
+    
+    //And the IMU Sample thread
+    Thread t1(sample_IMU);
+    
+    while(1) {}
+}
\ No newline at end of file

diff -r 000000000000 -r 0d977b83a68d mbed-rtos.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-rtos.lib	Tue Mar 15 21:27:30 2016 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed-rtos/#dfc27975e193

diff -r 000000000000 -r 0d977b83a68d mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Tue Mar 15 21:27:30 2016 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/87f2f5183dfb
\ No newline at end of file

diff -r 000000000000 -r 0d977b83a68d mpr121.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mpr121.cpp	Tue Mar 15 21:27:30 2016 +0000
@@ -0,0 +1,221 @@
+/*
+Copyright (c) 2011 Anthony Buckton (abuckton [at] blackink [dot} net {dot} au)
+ 
+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 THE
+AUTHORS OR COPYRIGHT HOLDERS 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.
+*/
+
+#include <mbed.h>
+#include <sstream>
+#include <string>
+#include <list>
+
+#include <mpr121.h>
+    
+Mpr121::Mpr121(I2C *i2c, Address i2cAddress)
+{
+    this->i2c = i2c;
+    
+    address = i2cAddress;
+           
+    // Configure the MPR121 settings to default
+    this->configureSettings();
+}
+
+   
+void Mpr121::configureSettings()
+{
+    // Put the MPR into setup mode
+    this->write(ELE_CFG,0x00);
+    
+    // Electrode filters for when data is > baseline
+    unsigned char gtBaseline[] = {
+         0x01,  //MHD_R
+         0x01,  //NHD_R 
+         0x00,  //NCL_R
+         0x00   //FDL_R
+         };
+         
+    writeMany(MHD_R,gtBaseline,4);   
+                 
+     // Electrode filters for when data is < baseline   
+     unsigned char ltBaseline[] = {
+        0x01,   //MHD_F
+        0x01,   //NHD_F
+        0xFF,   //NCL_F
+        0x02    //FDL_F
+        };
+        
+    writeMany(MHD_F,ltBaseline,4);
+        
+    // Electrode touch and release thresholds
+    unsigned char electrodeThresholds[] = {
+        E_THR_T, // Touch Threshhold
+        E_THR_R  // Release Threshold
+        };
+
+    for(int i=0; i<12; i++){
+        int result = writeMany((ELE0_T+(i*2)),electrodeThresholds,2);
+    }   
+
+    // Proximity Settings
+    unsigned char proximitySettings[] = {
+        0xff,   //MHD_Prox_R
+        0xff,   //NHD_Prox_R
+        0x00,   //NCL_Prox_R
+        0x00,   //FDL_Prox_R
+        0x01,   //MHD_Prox_F
+        0x01,   //NHD_Prox_F
+        0xFF,   //NCL_Prox_F
+        0xff,   //FDL_Prox_F
+        0x00,   //NHD_Prox_T
+        0x00,   //NCL_Prox_T
+        0x00    //NFD_Prox_T
+        };
+    writeMany(MHDPROXR,proximitySettings,11);
+
+    unsigned char proxThresh[] = {
+        PROX_THR_T, // Touch Threshold
+        PROX_THR_R  // Release Threshold
+        };
+    writeMany(EPROXTTH,proxThresh,2); 
+       
+    this->write(FIL_CFG,0x04);
+    
+    // Set the electrode config to transition to active mode
+    this->write(ELE_CFG,0x0c);
+}
+
+void Mpr121::setElectrodeThreshold(int electrode, unsigned char touch, unsigned char release){
+    
+    if(electrode > 11) return;
+    
+    // Get the current mode
+    unsigned char mode = this->read(ELE_CFG);
+    
+    // Put the MPR into setup mode
+    this->write(ELE_CFG,0x00);
+    
+    // Write the new threshold
+    this->write((ELE0_T+(electrode*2)), touch);
+    this->write((ELE0_T+(electrode*2)+1), release);
+    
+    //Restore the operating mode
+    this->write(ELE_CFG, mode);
+}
+    
+    
+unsigned char Mpr121::read(int key){
+
+    unsigned char data[2];
+    
+    //Start the command
+    i2c->start();
+
+    // Address the target (Write mode)
+    int ack1= i2c->write(address);
+
+    // Set the register key to read
+    int ack2 = i2c->write(key);
+
+    // Re-start for read of data
+    i2c->start();
+
+    // Re-send the target address in read mode
+    int ack3 = i2c->write(address+1);
+
+    // Read in the result
+    data[0] = i2c->read(0); 
+
+    // Reset the bus        
+    i2c->stop();
+
+    return data[0];
+}
+
+
+int Mpr121::write(int key, unsigned char value){
+    
+    //Start the command
+    i2c->start();
+
+    // Address the target (Write mode)
+    int ack1= i2c->write(address);
+
+    // Set the register key to write
+    int ack2 = i2c->write(key);
+
+    // Read in the result
+    int ack3 = i2c->write(value); 
+
+    // Reset the bus        
+    i2c->stop();
+    
+    return (ack1+ack2+ack3)-3;
+}
+
+
+int Mpr121::writeMany(int start, unsigned char* dataSet, int length){
+    //Start the command
+    i2c->start();
+
+    // Address the target (Write mode)
+    int ack= i2c->write(address);
+    if(ack!=1){
+        return -1;
+    }
+    
+    // Set the register key to write
+    ack = i2c->write(start);
+    if(ack!=1){
+        return -1;
+    }
+
+    // Write the date set
+    int count = 0;
+    while(ack==1 && (count < length)){
+        ack = i2c->write(dataSet[count]);
+        count++;
+    } 
+    // Stop the cmd
+    i2c->stop();
+    
+    return count;
+}
+      
+
+bool Mpr121::getProximityMode(){
+    if(this->read(ELE_CFG) > 0x0c)
+        return true;
+    else
+        return false;
+}
+
+void Mpr121::setProximityMode(bool mode){
+    this->write(ELE_CFG,0x00);
+    if(mode){
+        this->write(ELE_CFG,0x30); //Sense proximity from ALL pads
+    } else {
+        this->write(ELE_CFG,0x0c); //Sense touch, all 12 pads active.
+    }
+}
+
+
+int Mpr121::readTouchData(){
+    return this->read(0x00);
+}
\ No newline at end of file

diff -r 000000000000 -r 0d977b83a68d mpr121.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mpr121.h	Tue Mar 15 21:27:30 2016 +0000
@@ -0,0 +1,157 @@
+/*
+Copyright (c) 2011 Anthony Buckton (abuckton [at] blackink [dot} net {dot} au)
+
+ 
+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 THE
+AUTHORS OR COPYRIGHT HOLDERS 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.
+
+   Parts written by Jim Lindblom of Sparkfun
+   Ported to mbed by A.Buckton, Feb 2011
+*/
+
+#ifndef MPR121_H
+#define MPR121_H
+
+//using namespace std;
+
+class Mpr121 
+{
+
+public:
+    // i2c Addresses, bit-shifted
+    enum Address { ADD_VSS = 0xb4,// ADD->VSS = 0x5a <-wiring on Sparkfun board
+                   ADD_VDD = 0xb6,// ADD->VDD = 0x5b
+                   ADD_SCL = 0xb8,// ADD->SDA = 0x5c
+                   ADD_SDA = 0xba // ADD->SCL = 0x5d
+                 };
+
+    // Real initialiser, takes the i2c address of the device.
+    Mpr121(I2C *i2c, Address i2cAddress);
+    
+    bool getProximityMode();
+    
+    void setProximityMode(bool mode);
+    
+    int readTouchData();
+               
+    unsigned char read(int key);
+    
+    int write(int address, unsigned char value);
+    int writeMany(int start, unsigned char* dataSet, int length);
+
+    void setElectrodeThreshold(int electrodeId, unsigned char touchThreshold, unsigned char releaseThreshold);
+        
+protected:
+    // Configures the MPR with standard settings. This is permitted to be overwritten by sub-classes.
+    void configureSettings();
+    
+private:
+    // The I2C bus instance.
+    I2C *i2c;
+
+    // i2c address of this mpr121
+    Address address;
+};
+
+
+// MPR121 Register Defines
+#define    MHD_R        0x2B
+#define    NHD_R        0x2C
+#define    NCL_R        0x2D
+#define    FDL_R        0x2E
+#define    MHD_F        0x2F
+#define    NHD_F        0x30
+#define    NCL_F        0x31
+#define    FDL_F        0x32
+#define    NHDT         0x33
+#define    NCLT         0x34
+#define    FDLT         0x35
+// Proximity sensing controls
+#define    MHDPROXR     0x36
+#define    NHDPROXR     0x37
+#define    NCLPROXR     0x38
+#define    FDLPROXR     0x39
+#define    MHDPROXF     0x3A
+#define    NHDPROXF     0x3B
+#define    NCLPROXF     0x3C
+#define    FDLPROXF     0x3D
+#define    NHDPROXT     0x3E
+#define    NCLPROXT     0x3F
+#define    FDLPROXT     0x40
+// Electrode Touch/Release thresholds
+#define    ELE0_T       0x41
+#define    ELE0_R       0x42
+#define    ELE1_T       0x43
+#define    ELE1_R       0x44
+#define    ELE2_T       0x45
+#define    ELE2_R       0x46
+#define    ELE3_T       0x47
+#define    ELE3_R       0x48
+#define    ELE4_T       0x49
+#define    ELE4_R       0x4A
+#define    ELE5_T       0x4B
+#define    ELE5_R       0x4C
+#define    ELE6_T       0x4D
+#define    ELE6_R       0x4E
+#define    ELE7_T       0x4F
+#define    ELE7_R       0x50
+#define    ELE8_T       0x51
+#define    ELE8_R       0x52
+#define    ELE9_T       0x53
+#define    ELE9_R       0x54
+#define    ELE10_T      0x55
+#define    ELE10_R      0x56
+#define    ELE11_T      0x57
+#define    ELE11_R      0x58
+// Proximity Touch/Release thresholds
+#define    EPROXTTH     0x59
+#define    EPROXRTH     0x5A
+// Debounce configuration
+#define    DEB_CFG      0x5B
+// AFE- Analogue Front End configuration
+#define    AFE_CFG      0x5C 
+// Filter configuration
+#define    FIL_CFG      0x5D
+// Electrode configuration - transistions to "active mode"
+#define    ELE_CFG      0x5E
+
+#define GPIO_CTRL0      0x73
+#define GPIO_CTRL1      0x74
+#define GPIO_DATA       0x75
+#define    GPIO_DIR     0x76
+#define    GPIO_EN      0x77
+#define    GPIO_SET     0x78
+#define GPIO_CLEAR      0x79
+#define GPIO_TOGGLE     0x7A
+// Auto configration registers
+#define    AUTO_CFG_0   0x7B
+#define    AUTO_CFG_U   0x7D
+#define    AUTO_CFG_L   0x7E
+#define    AUTO_CFG_T   0x7F
+
+// Threshold defaults
+// Electrode touch threshold
+#define    E_THR_T      0x0F   
+// Electrode release threshold 
+#define    E_THR_R      0x0A    
+// Prox touch threshold
+#define    PROX_THR_T   0x02
+// Prox release threshold
+#define    PROX_THR_R   0x02
+
+#endif