TAISAKU NISHIJIMA / Mbed 2 deprecated penkich_percussion_2_NUCLEO

penkich_percussion_2_NUCLEO

Dependencies:   mbed

Fork of penkich_test_percussion by kitac_mbed_WS

main.cpp@0:e363f64b5744, 2015-08-18 (annotated)

Committer:
penkich
Date:
Tue Aug 18 12:26:25 2015 +0000
Revision:
0:e363f64b5744
Child:
1:b102b9476594
test

Who changed what in which revision?

UserRevisionLine numberNew contents of line
penkich 0:e363f64b5744 1 #include "mbed.h"
penkich 0:e363f64b5744 2
penkich 0:e363f64b5744 3 DigitalIn sw(dp9);
penkich 0:e363f64b5744 4 Ticker timer;
penkich 0:e363f64b5744 5 PwmOut speaker(dp18);
penkich 0:e363f64b5744 6 Ticker envelope;
penkich 0:e363f64b5744 7 PwmOut env(dp24);
penkich 0:e363f64b5744 8 static int tms_per10=0;
penkich 0:e363f64b5744 9
penkich 0:e363f64b5744 10 void env_out(void){
penkich 0:e363f64b5744 11 float attack_ms =10;
penkich 0:e363f64b5744 12 float decay_ms = 10;
penkich 0:e363f64b5744 13 float sustain_ms = 200;
penkich 0:e363f64b5744 14 float sustain = 0.5;
penkich 0:e363f64b5744 15 float release_ms = 400;
penkich 0:e363f64b5744 16
penkich 0:e363f64b5744 17 float out_level;
penkich 0:e363f64b5744 18 tms_per10++;
penkich 0:e363f64b5744 19 if (tms_per10 > (attack_ms + decay_ms + sustain_ms + release_ms) * 10){
penkich 0:e363f64b5744 20 env.write(0.0f);
penkich 0:e363f64b5744 21 }else if(tms_per10 > (attack_ms + decay_ms + sustain_ms) * 10){
penkich 0:e363f64b5744 22 out_level = sustain/(tms_per10 - (attack_ms + decay_ms + sustain_ms)) * release_ms;
penkich 0:e363f64b5744 23 env.write(out_level);
penkich 0:e363f64b5744 24 }else if(tms_per10 > (attack_ms + decay_ms) * 10){
penkich 0:e363f64b5744 25 env.write(sustain);
penkich 0:e363f64b5744 26 }else if(tms_per10 > attack_ms * 10){
penkich 0:e363f64b5744 27 env.write(1.0f);
penkich 0:e363f64b5744 28 }else{
penkich 0:e363f64b5744 29 out_level = 1.0/attack_ms * tms_per10;
penkich 0:e363f64b5744 30 env.write(out_level);
penkich 0:e363f64b5744 31 }
penkich 0:e363f64b5744 32 }
penkich 0:e363f64b5744 33
penkich 0:e363f64b5744 34 void sound_out(void){
penkich 0:e363f64b5744 35 speaker.write(((float)rand()/RAND_MAX));
penkich 0:e363f64b5744 36 }
penkich 0:e363f64b5744 37
penkich 0:e363f64b5744 38
penkich 0:e363f64b5744 39 int main()
penkich 0:e363f64b5744 40 {
penkich 0:e363f64b5744 41 while(1){
penkich 0:e363f64b5744 42 if (sw ==0){
penkich 0:e363f64b5744 43 tms_per10=0;
penkich 0:e363f64b5744 44 speaker.period_us(10);
penkich 0:e363f64b5744 45 env.period_us(10);
penkich 0:e363f64b5744 46 timer.attach_us(&sound_out,100); //10kHz
penkich 0:e363f64b5744 47 envelope.attach_us(&env_out,100); //10kHz
penkich 0:e363f64b5744 48 }
penkich 0:e363f64b5744 49 wait(0.01f);
penkich 0:e363f64b5744 50 }
penkich 0:e363f64b5744 51 }