/**
 * @file piezoSpeaker.h
 * @author Trevor Barnes
 * @brief 
 * @version 0.1
 * @date 2022-01-19
 * 
 * @copyright Copyright (c) 2022
 * 
 */

#ifndef PIEZOSPEAKER_H_
#define PIEZOSPEAKER_H_

// RCC
#define RCC_AHB1ENR (volatile uint32_t*) 0x40023830
#define RCC_APB1ENR (volatile uint32_t*) 0x40023840

// GPIOB
#define GPIOB_MODER (volatile uint32_t*) 0x40020400
#define GPIOBEN 1
#define GPIOB_AFRL (volatile uint32_t*) 0x40020420
#define AFRL_TIM3_CH1_EN 17

// Timer 3
#define TIM3_EN 1
#define TIM3_CCMR1 (volatile uint32_t*) 0x40000418
#define OC1PE 3
#define OC1M_PWM2 0b1110000
#define TIM3_CCER (volatile uint32_t*) 0x40000420
#define CCER_CC1E 1
#define TIM3_EGR (volatile uint32_t*) 0x40000414
#define EGR_UG 1
#define TIM3_PSC (volatile uint32_t*) 0x40000428
#define TIM3_ARR (volatile uint32_t*) 0x4000042C
#define TIM3_CCR1 (volatile uint32_t*) 0x40000434
#define TIM3_CR1 (volatile uint32_t*) 0x40000400
#define CR_ARPE_EN 7
#define CR_CEN 1

#define PB4_AF_V 0b10
#define PB4_AF_P 9

#define pitchDivisor 1000000

typedef struct{
	unsigned int noteFrequency;
	unsigned int noteDuration;
} Note;

void piezo_init();

void play_note(Note noteToPlay);
// void play_note(double playFrequency, double playDuration);

void play_song(Note *songToPlay);

// Note Frequency Symbols
// Rest technically = 0
//#define r	0
//#define	C0  16.35
//#define	Db0	17.32
//#define	D0	18.35
//#define	Eb0	19.45
//#define	E0	20.60
//#define	F0	21.83
//#define	Gb0	23.12
//#define	G0	24.50
//#define	Ab0	25.96
//#define	A0	27.50
//#define	Bb0	29.14
//#define	B0	30.87
//#define	C1	32.70
//#define	Db1	34.65
//#define	D1	36.71
//#define	Eb1	38.89
//#define	E1	41.20
//#define	F1	43.65
//#define	Gb1	46.25
//#define	G1	49.00
//#define	Ab1	51.91
//#define	A1	55.00
//#define	Bb1	58.27
//#define	B1	61.74
//#define	C2	65.41
//#define	Db2	69.30
//#define	D2	73.42
//#define	Eb2	77.78
//#define	E2	82.41
//#define	F2	87.31
//#define	Gb2	92.50
//#define	G2	98.00
//#define	Ab2	103.83
//#define	A2	110.00
//#define	Bb2	116.54
//#define	B2	123.47
//#define	C3	130.81
//#define	Db3	138.59
//#define	D3	146.83
//#define	Eb3	155.56
//#define	E3	164.81
//#define	F3	174.61
//#define	Gb3	185.00
//#define	G3	196.00
//#define	Ab3	207.65
//#define	A3	220.00
//#define	Bb3	233.08
//#define	B3	246.94
//#define	C4	261.63
//#define	Db4	277.18
//#define	D4	293.66
//#define	Eb4	311.13
//#define	E4	329.63
//#define	F4	349.23
//#define	Gb4	369.99
//#define	G4	392.00
//#define	Ab4	415.30
//#define	A4	440.00
//#define	Bb4	466.16
//#define	B4	493.88
//#define	C5	523.25
//#define	Db5	554.37
//#define	D5	587.33
//#define	Eb5	622.25
//#define	E5	659.26
//#define	F5	698.46
//#define	Gb5	739.99
//#define	G5	783.99
//#define	Ab5	830.61
//#define A5	880.00
//#define	Bb5	932.33
//#define	B5	987.77
//#define	C6	1046.50
//#define	Db6	1108.73
//#define	D6	1174.66
//#define	Eb6	1244.51
//#define	E6	1318.51
//#define	F6	1396.91
//#define	Gb6	1479.98
//#define	G6	1567.98
//#define	Ab6	1661.22
//#define	A6	1760.00
//#define	Bb6	1864.66
//#define	B6	1975.53
//#define	C7	2093.00
//#define	Db7	2217.46
//#define	D7	2349.32
//#define	Eb7	2489.02
//#define	E7	2637.02
//#define	F7	2793.83
//#define	Gb7	2959.96
//#define	G7	3135.96
//#define	Ab7	3322.44
//#define A7	3520.01
//#define	Bb7	3729.31
//#define	B7	3951.07
//#define	C8	4186.01
//#define	Db8	4434.92
//#define	D8	4698.64
//#define	Eb8	4978.03

 #define 	r	0
 #define	C0  1635
 #define	Db0	1732
 #define	D0	1835
 #define	Eb0	1945
 #define	E0	2060
 #define	F0	2183
 #define	Gb0	2312
 #define	G0	2450
 #define	Ab0	2596
 #define	A0	2750
 #define	Bb0	2914
 #define	B0	3087
 #define	C1	3270
 #define	Db1	3465
 #define	D1	3671
 #define	Eb1	3889
 #define	E1	4120
 #define	F1	4365
 #define	Gb1	4625
 #define	G1	4900
 #define	Ab1	5191
 #define	A1	5500
 #define	Bb1	5827
 #define	B1	6174
 #define	C2	6541
 #define	Db2	6930
 #define	D2	7342
 #define	Eb2	7778
 #define	E2	8241
 #define	F2	8731
 #define	Gb2	9250
 #define	G2	9800
 #define	Ab2	10383
 #define	A2	11000
 #define	Bb2	11654
 #define	B2	12347
 #define	C3	13081
 #define	Db3	13859
 #define	D3	14683
 #define	Eb3	15556
 #define	E3	16481
 #define	F3	17461
 #define	Gb3	18500
 #define	G3	19600
 #define	Ab3	20765
 #define	A3	22000
 #define	Bb3	23308
 #define	B3	24694
 #define	C4	26163
 #define	Db4	27718
 #define	D4	29366
 #define	Eb4	31113
 #define	E4	32963
 #define	F4	34923
 #define	Gb4	36999
 #define	G4	39200
 #define	Ab4	41530
 #define	A4	44000
 #define	Bb4	46616
 #define	B4	49388
 #define	C5	52325
 #define	Db5	55437
 #define	D5	58733
 #define	Eb5	62225
 #define	E5	65926
 #define	F5	69846
 #define	Gb5	73999
 #define	G5	78399
 #define	Ab5	83061
 #define 	A5	88000
 #define	Bb5	93233
 #define	B5	98777
 #define	C6	104650
 #define	Db6	110873
 #define	D6	117466
 #define	Eb6	124451
 #define	E6	131851
 #define	F6	139691
 #define	Gb6	147998
 #define	G6	156798
 #define	Ab6	166122
 #define	A6	176000
 #define	Bb6	186466
 #define	B6	197553
 #define	C7	209300
 #define	Db7	221746
 #define	D7	234932
 #define	Eb7	248902
 #define	E7	263702
 #define	F7	279383
 #define	Gb7	295996
 #define	G7	313596
 #define	Ab7	332244
 #define 	A7	352001
 #define	Bb7	372931
 #define	B7	395107
 #define	C8	418601
 #define	Db8	443492
 #define	D8	469864
 #define	Eb8	497803
// Ending "termination" value indicating end of a song
#define T 5000
// Tempo value set at 120 beats per min
#define BPM 120
#define H 2*Q
#define Q 60000/BPM
#define E Q/2
#define S Q/4
#define W 4*Q

#endif