Michael T. Yarnell / PWM_6_Tone_Library

This is from justinkim/PWM_Tone_Library modified for six octaves.

Fork of PWM_Tone_Library by justin kim

pwm_tone.cpp@2:1d3262096227, 2017-04-18 (annotated)

Committer:
MTYarnell
Date:
Tue Apr 18 15:57:38 2017 +0000
Revision:
2:1d3262096227
Parent:
0:d06af372d384 
Modified as part of "Hexi_Acceleromagnetic_Synth" 2017, Michael Yarnell, Alec Pierce.  ; Octaves 1, 2, and 6 were added after calculation based on 3, 4, and 5.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
justinkim 0:d06af372d384 1 /* Includes ------------------------------------------------------------------*/
justinkim 0:d06af372d384 2 #include "pwm_tone.h"
justinkim 0:d06af372d384 3
justinkim 0:d06af372d384 4 /* Private typedef -----------------------------------------------------------*/
justinkim 0:d06af372d384 5 /* Private define ------------------------------------------------------------*/
justinkim 0:d06af372d384 6 /* Private variables ---------------------------------------------------------*/
justinkim 0:d06af372d384 7 /* Private function prototypes -----------------------------------------------*/
justinkim 0:d06af372d384 8 /* Private functions ---------------------------------------------------------*/
justinkim 0:d06af372d384 9
justinkim 0:d06af372d384 10 /**
justinkim 0:d06af372d384 11 * @brief Tune Function
justinkim 0:d06af372d384 12 * @param name : Choose the PwmOut
justinkim 0:d06af372d384 13 period : this param is tune value. (C_3...B_5)
justinkim 0:d06af372d384 14 beat : this param is beat value. (1..16) 1 means 1/16 beat
justinkim 0:d06af372d384 15 * @retval None
justinkim 0:d06af372d384 16 */
justinkim 0:d06af372d384 17 void Tune(PwmOut name, int period, int beat)
justinkim 0:d06af372d384 18 {
justinkim 0:d06af372d384 19 int delay;
justinkim 0:d06af372d384 20
justinkim 0:d06af372d384 21 delay = beat*63;
justinkim 0:d06af372d384 22 name.period_us(period);
justinkim 0:d06af372d384 23 name.write(0.50f); // 50% duty cycle
justinkim 0:d06af372d384 24 wait_ms(delay); // 1 beat
justinkim 0:d06af372d384 25 name.period_us(0); // Sound off
justinkim 0:d06af372d384 26 }
justinkim 0:d06af372d384 27
justinkim 0:d06af372d384 28 /**
justinkim 0:d06af372d384 29 * @brief Auto tunes Function
justinkim 0:d06af372d384 30 * @param name : Choose the PwmOut
MTYarnell 2:1d3262096227 31 period : this param is tune value. (C_1...B_6)
justinkim 0:d06af372d384 32 beat : this param is beat value. (1..16) 1 means 1/16 beat
justinkim 0:d06af372d384 33 * @retval None
justinkim 0:d06af372d384 34 */
justinkim 0:d06af372d384 35 void Auto_tunes(PwmOut name, int period, int beat)
justinkim 0:d06af372d384 36 {
justinkim 0:d06af372d384 37 int delay;
justinkim 0:d06af372d384 38
justinkim 0:d06af372d384 39 delay = beat*63;
justinkim 0:d06af372d384 40 name.period_us(period);
justinkim 0:d06af372d384 41 name.write(0.50f); // 50% duty cycle
justinkim 0:d06af372d384 42 wait_ms(delay);
justinkim 0:d06af372d384 43 }
justinkim 0:d06af372d384 44
justinkim 0:d06af372d384 45 /**
justinkim 0:d06af372d384 46 * @brief Stop tunes Function
justinkim 0:d06af372d384 47 * @param name : Choose the PwmOut
justinkim 0:d06af372d384 48 * @retval None
justinkim 0:d06af372d384 49 */
justinkim 0:d06af372d384 50 void Stop_tunes(PwmOut name)
justinkim 0:d06af372d384 51 {
justinkim 0:d06af372d384 52 name.period_us(0);
justinkim 0:d06af372d384 53 }