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Added left click based on microphone data #1

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Added left click based on microphone data #1

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72 changes: 71 additions & 1 deletion TRACKBOWLmk2/TRACKBOWLmk2.ino
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Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,13 @@
#include <bluefruit.h>
#include <Adafruit_LittleFS.h>
#include <InternalFileSystem.h>

#include <PDM.h>
int32_t mic;

extern PDMClass PDM;
short sampleBuffer[256]; // buffer to read samples into, each sample is 16-bits
volatile int samplesRead; // number of samples read

#define ROTATE_Z_PIN 10
#define Z_ROTATION_FILENAME "/trackbowl_z"

Expand Down Expand Up @@ -37,6 +43,17 @@ float battery = 0;
uint32_t lastBatteryReport;

void setup() {
//********************
Serial.begin(115200);
while ( !Serial ) delay(10); // for nrf52840 with native usb
Serial.println("Trackbowl Mouse is active");

PDM.onReceive(onPDMdata);
PDM.begin(1, 16000);


//*********************

pinMode(ROTATE_Z_PIN, INPUT_PULLUP);
// for battery level readings
analogReference(AR_INTERNAL_3_0);
Expand Down Expand Up @@ -150,13 +167,66 @@ void quatmul(float* result, float* r, float* q) {
result[2] = r[0] * q[2] + r[1] * q[3] + r[2] * q[0] - r[3] * q[1];
result[3] = r[0] * q[3] - r[1] * q[2] + r[2] * q[1] + r[3] * q[0];
}
//****************************


int32_t getPDMwave(int32_t samples) {
short minwave = 30000;
short maxwave = -30000;

while (samples > 0) {
if (!samplesRead) {
yield();
continue;
}
for (int i = 0; i < samplesRead; i++) {
minwave = min(sampleBuffer[i], minwave);
maxwave = max(sampleBuffer[i], maxwave);
samples--;
}
// clear the read count
samplesRead = 0;
}
return maxwave - minwave;
}

void onPDMdata() {
// query the number of bytes available
int bytesAvailable = PDM.available();

// read into the sample buffer
PDM.read(sampleBuffer, bytesAvailable);

// 16-bit, 2 bytes per sample
samplesRead = bytesAvailable / 2;
}

//*********************************

void loop() {
// we target 66 Hz
uint32_t current_millis = millis();
if ((current_millis - prev_millis) < 15) {
return;
}



//************************

samplesRead = 0;
mic = getPDMwave(400);
//Serial.println(mic);
if(mic > 1000){
blehid.mouseButtonPress(MOUSE_BUTTON_LEFT);
blehid.mouseButtonRelease();
Serial.println("Mouse Clicked");
}


//Serial.print("Mic: ");

//***********************
prev_millis = current_millis;

if (needToPersistRotationZ && (lastRotationZAdjustment + 3000 < current_millis)) {
Expand Down