Simple Tone Generator for the Spark Core

sparkTone.cpp

//-----------------------------------------------//
// SPARK CORE SIMPLE TONE GENERATOR              //
//===============================================//
// Copy this into a new application at:          //
// https://www.spark.io/build and go nuts!       //
//-----------------------------------------------//
// Technobly / BDub - Jan 2014                   //
//===============================================//

#define NOTE_B2		4065
#define NOTE_C3		3817
#define NOTE_CS3	3597
#define NOTE_D3		3401
#define NOTE_DS3	3205
#define NOTE_E3		3030
#define NOTE_F3		2857
#define NOTE_FS3	2703
#define NOTE_G3		2551
#define NOTE_GS3	2404
#define NOTE_A3		2273
#define NOTE_AS3	2146
#define NOTE_B3		2024
#define NOTE_C4		1908
#define NOTE_CS4	1805
#define NOTE_D4		1701
#define NOTE_DS4	1608
#define NOTE_E4		1515
#define NOTE_F4		1433
#define NOTE_FS4	1351
#define NOTE_G4		1276
#define NOTE_GS4	1205
#define NOTE_A4		1136
#define NOTE_AS4	1073
#define NOTE_B4		1012
#define NOTE_C5		956
#define NOTE_CS5	903
#define NOTE_D5		852
#define NOTE_DS5	804
#define NOTE_E5		759
#define NOTE_F5		716
#define NOTE_FS5	676
#define NOTE_G5		638
#define NOTE_GS5	602
#define NOTE_A5		568
#define NOTE_AS5	536
#define NOTE_B5		506
#define NOTE_C6		478
#define NOTE_CS6	451
#define NOTE_D6		426
#define NOTE_DS6	402
#define NOTE_E6		379
#define NOTE_F6		358
#define NOTE_FS6	338
#define NOTE_G6		319
#define NOTE_GS6	301
#define NOTE_A6		284
#define NOTE_AS6	268
#define NOTE_B6		253
#define NOTE_C7		239
#define NOTE_CS7	226
#define NOTE_D7		213
#define NOTE_DS7	201
#define NOTE_E7		190
#define NOTE_F7		179
#define NOTE_FS7	169
#define NOTE_G7		159
#define NOTE_GS7	151
#define NOTE_A7		142
#define NOTE_AS7	134
#define NOTE_B7		127
#define NOTE_C8		119
#define NOTE_CS8	113
#define NOTE_D8		106
#define NOTE_DS8	100

#define DURATION 1000000 // in microseconds
#define MAX_NOTES 65
int note[MAX_NOTES] = 
{4065,3817,3597,3401,3205,3030,2857,2703,2551,2404,2273,
2146,2024,1908,1805,1701,1608,1515,1433,1351,1276,1205,
1136,1073,1012,956,903,852,804,759,716,676,638,602,568,
536,506,478,451,426,402,379,358,338,319,301,284,268,253,
239,226,213,201,190,179,169,159,151,142,134,127,119,113,106,100};

int16_t pin = D6;
int16_t x,y = 0;

void setup() {
  pinMode(pin,OUTPUT);
}

void loop() {
  for(x=0;x<(DURATION/note[y]);x++) {
    PIN_MAP[pin].gpio_peripheral->BSRR = PIN_MAP[pin].gpio_pin; // HIGH
    delayMicroseconds(note[y]);
    PIN_MAP[pin].gpio_peripheral->BRR = PIN_MAP[pin].gpio_pin;  // LOW
    delayMicroseconds(note[y]);
  }
  y++;
  if(y>=MAX_NOTES) y=0;
  delay(250);
}