Luke Cartwright / Mbed 2 deprecated ELEC2645_Project_el18loc_nearlythere

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Dependencies:   mbed

Sound/Sound.cpp@18:204cd747b54a, 2020-05-21 (annotated)

Committer:
lukeocarwright
Date:
Thu May 21 22:59:59 2020 +0000
Revision:
18:204cd747b54a
Parent:
15:1c67f064278e
Child:
24:c3bb1b0b2207
Got attack working with hardware glitch (slew rate issue and distortion likely due to loading and amp module). Generates CSV file to check output with envelope.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lukeocarwright 14:9cfe0041cc4e 1 #include "Sound.h"
lukeocarwright 14:9cfe0041cc4e 2
lukeocarwright 14:9cfe0041cc4e 3 //Global Variables
lukeocarwright 14:9cfe0041cc4e 4 volatile extern uint16_t sin_wavtable[1024];
lukeocarwright 14:9cfe0041cc4e 5 volatile extern uint16_t tri_wavtable[1024];
lukeocarwright 14:9cfe0041cc4e 6 volatile extern uint16_t pulse_wavtable[1024];
lukeocarwright 14:9cfe0041cc4e 7
lukeocarwright 14:9cfe0041cc4e 8 //Constructor/Destructor
lukeocarwright 14:9cfe0041cc4e 9 Sound::Sound()
lukeocarwright 14:9cfe0041cc4e 10 {
lukeocarwright 14:9cfe0041cc4e 11 }
lukeocarwright 14:9cfe0041cc4e 12 Sound::~Sound()
lukeocarwright 14:9cfe0041cc4e 13 {
lukeocarwright 14:9cfe0041cc4e 14 }
lukeocarwright 14:9cfe0041cc4e 15
lukeocarwright 14:9cfe0041cc4e 16 //PUBLIC:-----------------------------------------------------------------------
lukeocarwright 14:9cfe0041cc4e 17
lukeocarwright 14:9cfe0041cc4e 18 uint16_t Sound::sound_main(bool initial, int waveform, int frequency)
lukeocarwright 14:9cfe0041cc4e 19 {
lukeocarwright 14:9cfe0041cc4e 20 if (initial==true) {
lukeocarwright 14:9cfe0041cc4e 21 i=0;
lukeocarwright 14:9cfe0041cc4e 22 return(i);
lukeocarwright 14:9cfe0041cc4e 23 }
lukeocarwright 15:1c67f064278e 24
lukeocarwright 14:9cfe0041cc4e 25 i=wavetable_itt(i,frequency);
lukeocarwright 15:1c67f064278e 26
lukeocarwright 14:9cfe0041cc4e 27 if (waveform==1) {
lukeocarwright 14:9cfe0041cc4e 28 #ifdef SLOW_TIME
lukeocarwright 18:204cd747b54a 29 printf("SIN_wavtable[%u]\n",i);
lukeocarwright 14:9cfe0041cc4e 30 #endif
lukeocarwright 14:9cfe0041cc4e 31 return (sin_wavtable[i]);
lukeocarwright 14:9cfe0041cc4e 32 }
lukeocarwright 15:1c67f064278e 33 if (waveform==2) {
lukeocarwright 15:1c67f064278e 34 #ifdef SLOW_TIME
lukeocarwright 18:204cd747b54a 35 printf("TRI_wavtable[%u]\n",i);
lukeocarwright 15:1c67f064278e 36 #endif
lukeocarwright 15:1c67f064278e 37 return (tri_wavtable[i]);
lukeocarwright 15:1c67f064278e 38 }
lukeocarwright 15:1c67f064278e 39 if (waveform==3) {
lukeocarwright 15:1c67f064278e 40 #ifdef SLOW_TIME
lukeocarwright 18:204cd747b54a 41 printf("SQR_wavtable[%u]\n",i);
lukeocarwright 15:1c67f064278e 42 #endif
lukeocarwright 15:1c67f064278e 43 return (pulse_wavtable[i]);
lukeocarwright 15:1c67f064278e 44 }
lukeocarwright 14:9cfe0041cc4e 45 return(0);
lukeocarwright 14:9cfe0041cc4e 46 }
lukeocarwright 14:9cfe0041cc4e 47
lukeocarwright 14:9cfe0041cc4e 48 //PRIVATE:----------------------------------------------------------------------
lukeocarwright 14:9cfe0041cc4e 49 uint16_t Sound::wavetable_itt(uint16_t i, int frequency)
lukeocarwright 14:9cfe0041cc4e 50 {
lukeocarwright 15:1c67f064278e 51 i_d = i + ((1024*frequency)/ 16000); //i+((samples*f)*Ts)
lukeocarwright 14:9cfe0041cc4e 52 i=ceil(i_d); //ROUND IN FUTURE*************
lukeocarwright 14:9cfe0041cc4e 53
lukeocarwright 14:9cfe0041cc4e 54 if (i>=1024) {
lukeocarwright 14:9cfe0041cc4e 55 i=i-1024;
lukeocarwright 14:9cfe0041cc4e 56 }
lukeocarwright 14:9cfe0041cc4e 57 return(i);
lukeocarwright 14:9cfe0041cc4e 58 }