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Got the more advanced breath signal filtering working. (Still some commented out crap in there from testing/comparing. Just ignore it.) Fixed some errors in curves.

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This commit is contained in:
Johan Berglund 2018-04-19 13:19:34 +02:00
parent f7b1df76d9
commit 041a92bdb5
1 changed files with 36 additions and 13 deletions
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49
NuEVI.ino
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@ -4,15 +4,15 @@
#include <EEPROM.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Filters.h>
#include <Filters.h> // for the breath signal LP filtering, https://github.com/edgar-bonet/Filters
/*
NAME: NuEVI
WRITTEN BY: JOHAN BERGLUND
DATE: 2017-08-26
DATE: 2018-04-19
FILE SAVED AS: NuEVI.ino
FOR: PJRC Teensy LC or 3.2 and a MPR121 capactive touch sensor board.
Uses an SSD1306 controlled OLED dispaly communicating over I2C.
FOR: PJRC Teensy 3.2 and a MPR121 capactive touch sensor board.
Uses an SSD1306 controlled OLED display communicating over I2C.
PROGRAMME FUNCTION: EVI Wind Controller using the Freescale MP3V5004GP breath sensor
and capacitive touch keys. Output to both USB MIDI and DIN MIDI.
@ -412,6 +412,8 @@ int oldbreath=0;
unsigned int oldbreathhires=0;
float filterFreq = 30.0;
float filterVal = 0.15;
float smoothedVal;
int pressureSensor; // pressure data from breath sensor, for midi breath cc and breath threshold checks
int lastPressure;
byte velocitySend; // remapped midi velocity from breath sensor (or set to static value if selected)
@ -442,10 +444,10 @@ unsigned int curveM3[] = {0,2900,5100,6650,8200,9500,10550,11500,12300,13100,138
unsigned int curveM2[] = {0,2000,3600,5000,6450,7850,9000,10100,11100,12100,12900,13700,14400,14950,15500,16000,16383};
unsigned int curveM1[] = {0,1400,2850,4100,5300,6450,7600,8700,9800,10750,11650,12600,13350,14150,14950,15650,16383};
unsigned int curveIn[] = {0,1023,2047,3071,4095,5119,6143,7167,8191,9215,10239,11263,12287,13311,14335,15359,16383};
unsigned int curveP1[] = {0,600,1350,2150,2900,3800,4700,5600,6650,7700,8800,9900,11100,12300,13500,14850,16838};
unsigned int curveP1[] = {0,600,1350,2150,2900,3800,4700,5600,6650,7700,8800,9900,11100,12300,13500,14850,16383};
unsigned int curveP2[] = {0,400,800,1300,2000,2650,3500,4300,5300,6250,7400,8500,9600,11050,12400,14100,16383};
unsigned int curveP3[] = {0,200,500,900,1300,1800,2350,3100,3800,4600,5550,6550,8000,9500,11250,13400,16383};
unsigned int curveP4[] = {0,100,200,400,700,1050,1500,1950,2550,3200,4000,4900,6050,7500,9300,12100,16282};
unsigned int curveP4[] = {0,100,200,400,700,1050,1500,1950,2550,3200,4000,4900,6050,7500,9300,12100,16383};
unsigned int curveS1[] = {0,600,1350,2150,2900,3800,4700,6000,8700,11000,12400,13400,14300,14950,15500,16000,16383};
unsigned int curveS2[] = {0,600,1350,2150,2900,4000,6100,9000,11000,12100,12900,13700,14400,14950,15500,16000,16383};
//unsigned int curveS3[] = {0,600,1350,2300,3800,6200,8700,10200,11100,12100,12900,13700,14400,14950,15500,16000,16383};
@ -610,7 +612,7 @@ void setup() {
display.setTextColor(WHITE);
display.setTextSize(1);
display.setCursor(85,52);
display.println("v.1.0.3"); // FIRMWARE VERSION NUMBER HERE <<<<<<<<<<<<<<<<<<<<<<<
display.println("v.1.0.5"); // FIRMWARE VERSION NUMBER HERE <<<<<<<<<<<<<<<<<<<<<<<
display.display();
delay(2000);
@ -640,8 +642,9 @@ void mainLoop() {
FilterOnePole breathFilter( LOWPASS, filterFreq ); // create a one pole (RC) lowpass filter
while (1){
breathFilter.input(analogRead(A0));
pressureSensor = breathFilter.output(); // Get the filtered pressure sensor reading from analog pin A0, input from sensor MP3V5004GP
pressureSensor = constrain((int)breathFilter.output(),0,4095); // Get the filtered pressure sensor reading from analog pin A0, input from sensor MP3V5004GP
//pressureSensor = analogRead(A0);
//pressureSensor = smooth(analogRead(0), filterVal, smoothedVal); // second parameter determines smoothness - 0 is off, .9999 is max smooth
if (mainState == NOTE_OFF) {
if (activeMIDIchannel != MIDIchannel) activeMIDIchannel = MIDIchannel; // only switch channel if no active note
if ((activePatch != patch) && doPatchUpdate){
@ -947,7 +950,25 @@ unsigned int breathCurve(unsigned int inputVal){
}
}
//**************************************************************
int smooth(int data, float filterVal, float smoothedVal){
if (filterVal > 1){ // check to make sure param's are within range
filterVal = .99;
}
else if (filterVal <= 0){
filterVal = 0;
}
smoothedVal = (data * (1 - filterVal)) + (smoothedVal * filterVal);
return (int)smoothedVal;
}
//**************************************************************
// MIDI note value check with out of range octave repeat
int noteValueCheck(int note){
@ -1049,8 +1070,8 @@ void statusLEDs() {
void breath(){
int breathCCval,breathCCvalFine;
unsigned int breathCCvalHires;
breathLevel = pressureSensor;
//breathLevel = breathLevel*0.6+pressureSensor*0.4; // smoothing of breathLevel value
breathLevel = constrain(pressureSensor,breathThrVal,breathMaxVal);
//breathLevel = breathLevel*0.6+pressureSensor*0.4; // smoothing of breathLevel value
////////breathCCval = map(constrain(breathLevel,breathThrVal,breathMaxVal),breathThrVal,breathMaxVal,0,127);
breathCCvalHires = breathCurve(map(constrain(breathLevel,breathThrVal,breathMaxVal),breathThrVal,breathMaxVal,0,16383));
breathCCval = (breathCCvalHires >>7) & 0x007F;
@ -3373,8 +3394,10 @@ void drawMenuScreen(){
display.print("MENU ");
int vMeterReading = analogRead(vMeterPin);
if (vMeterReading > 3000) display.print("USB "); else display.print("BAT ");
if (vMeterReading < 2294) display.print("LOW"); else display.print(map(vMeterReading,0,3030,0,50)*0.1,1);
display.print("V");
if (vMeterReading < 2294) display.print("LOW"); else {
display.print(map(vMeterReading,0,3030,0,50)*0.1,1);
display.print("V");
}
display.drawLine(0,9,127,9,WHITE);
display.setCursor(0,12);
display.println("TRANSPOSE");