File content as of revision 61:212d2db45c56:

//  24/03/2018  update - I appear to be able to address the device and write something, as I am getting an ACK returned from the i2c write() function.
//however if i use the write function with 4 arguments (as opposed to just 1 argument) then it doesnt work
//only works with the 1 argument version!!!


//THIS VERSION WORKED, CHANGED SOME THINGS, THEN CHANGED THEM BACK.  NOW IT NO LONGER WORKS!!!!
#include "mbed.h"
#include "math.h"
#include "I2S.h"
#include "SDFileSystem.h"
#include "wm8731_Config_setup.h"
#include "WOLFSON_config_consts.h"
//#include "BlockDevice.h"
#include <string>
#include <stdlib.h>
#include <fstream>
#include <iostream>
#include <vector>
#include <string>
#define sample_freq 11025
#pragma import __use_two_region_memory
//BlockDevice *bd = BlockDevice::get_default_instance();
//#include "LittleFileSystem.h"
//LittleFileSystem fs("fs");

DigitalOut myled(LED1);
DigitalOut led2(LED2);
DigitalOut led3(LED3);
DigitalIn  NotchUp(p16);
DigitalIn  NotchDown(p17);//check the pin!!! Dont know if this will actually work...
InterruptIn Horn(p16);
Ticker sampletick;

Ticker TickFadeOut;
Timer t;
Timer t2;
Timer NotchTimer;
Timer timer_open;

Serial pc(USBTX, USBRX); // tx, rx //FOR DEBUGGING PROGRAM USING GNU SCREEN
DigitalOut cs(p8);
I2S i2s(I2S_TRANSMIT, p5, p6, p7);
SDFileSystem sd(p11, p12, p13, p8, "sd"); // the new pinout that i am using

typedef struct uFMT_STRUCT {
    short comp_code;
    short num_channels;
    unsigned sample_rate;
    unsigned avg_Bps;
    short block_align;
    short sig_bps;
} FMT_STRUCT;

typedef struct uNotch_STRUCT {
    short Notch;
    short NotchTransUp;
    short NotchTransDown;
    short NotchDirection;
} Notch_STRUCT;

typedef struct uDATA_STRUCT {
    unsigned subchunk2_ID;
    unsigned subchunk2_size;
    char * data_buf;
} DATA_STRUCT;

typedef struct uWAV_FILE_STRUCT {
    FILE *WavFile;
    int id_number;
    char *slice_buf;
    int num_slices;
    FMT_STRUCT  FileFormat;
    DATA_STRUCT FileData;
} WAV_FILE_STRUCT;

/*typedef struct uWAV_FILE_STRUCT{
    FILE* WavFile;


}WAV_FILE_STRUCT;*/





class classSoundFile
{
public:

//add a class constructor at some point in the future (perform tests in visual studio)
    WAV_FILE_STRUCT FileInfo;
    short * data_sptr;
    string file_location;
    //classSoundFile(string filename);//this is the constructor
    //string filename;
};
class classPositionIndicators
{
public:
    int notch1_indicator, notch2_indicator, notch3_indicator, notch4_indicator;
    int notch5_indicator, notch6_indicator, notch7_indicator, notch8_indicator;
    int notch1_start_pt, notch2_start_pt, notch3_start_pt, notch4_start_pt;
    int notch5_start_pt, notch6_start_pt, notch7_start_pt, notch8_start_pt;
     
    int notch_start_pts [9];
    int notch_position_indicators[9];
    int notch_transitions_start_pts[15];
    int notch_transitions_position_indicators[15];
    int auxiliary_start_pts[5];
    int auxiliary_position_indicators[5];
    classPositionIndicators()
    {
        notch1_start_pt = 44;
        notch2_start_pt = 220884+44;
        notch3_start_pt = notch2_start_pt+217698;
        notch4_start_pt = notch3_start_pt + 193060;
        notch5_start_pt = notch4_start_pt + 92010;
        notch6_start_pt = notch5_start_pt + 216642;
        notch7_start_pt = notch6_start_pt + 250316;
        notch8_start_pt = notch7_start_pt + 150152;
        notch1_indicator = notch1_start_pt;
        notch2_indicator = notch2_start_pt;
        notch3_indicator = notch3_start_pt;
        notch4_indicator = notch4_start_pt;
        notch5_indicator = notch5_start_pt;
        notch6_indicator = notch6_start_pt;
        notch7_indicator = notch7_start_pt;
        notch8_indicator = notch8_start_pt;
        notch_start_pts[1] = notch1_start_pt;
        notch_start_pts[2] = notch2_start_pt;
        notch_start_pts[3] = notch3_start_pt;
        notch_start_pts[4] = notch4_start_pt;
        notch_start_pts[5] = notch5_start_pt;
        notch_start_pts[6] = notch6_start_pt;
        notch_start_pts[7] = notch7_start_pt;
        notch_start_pts[8] = notch8_start_pt;
        notch_position_indicators[1] = notch1_indicator;
        notch_position_indicators[2] = notch2_indicator;
        notch_position_indicators[3] = notch3_indicator;
        notch_position_indicators[4] = notch4_indicator;
        notch_position_indicators[5] = notch5_indicator;
        notch_position_indicators[6] = notch6_indicator;
        notch_position_indicators[7] = notch7_indicator;
        notch_position_indicators[8] = notch8_indicator;

    }
};

int OneOff = 0;
int notch_flag = 0;
int i = 0;
int h = 0;
short bufflen = 1;
int buffer[1];
int AudioFormat, NumChannels, SampleRate, BitsPerSample ;
char *slice_buf;
short *data_sptr;
short *data_sptr_horn;
short *data_sptr_IdleN2;
short * data_sptr_bell;
short * data_sptr_N2;
short * data_sptr_Flange;
unsigned char *data_bptr;
int *data_wptr;
unsigned channel;
long slice, slice1, slice2, slice3, num_slices;
int verbosity  = 0;
int verbosity2 = 0;
int verbosity3 = 0;
int verbosity4 = 0;
int verbosity5 = 0;
int interrupt_condition = 1;
int sampling_freq = 11025;
const int BufferLen = 2000;
short Buffer1[BufferLen];
short Buffer2[BufferLen];
short place_hold1 = 0;
short place_hold2 = 0;


string FOLDER;
string RootFolder = "/sd/mydir/SoundDecoder/";
string  filename[25];
classSoundFile Sound[22];

volatile int flag1 = 1;
volatile int flag2 = 0;
volatile int flag3 = 1;
volatile int flag4 = 0;
int FLAGBUFF1 = 0;
int FLAGBUFF2 = 0;
int BellFlag = 0;
int BellFlag2 = 0;
int FadeFlag = 0;
int BlockFlag = 0;
int FileSwitchFlag = 0;


short value[1];

//long long slice_value;
int slice_value[1];


FILE *wavfile1;
FILE *wavfile2;
FILE *wavfile3;

classSoundFile Sound1;
classSoundFile Sound2;
classSoundFile Sound3;


void isr()
{
    //timer_interrupt.start();
    if(flag1 == 0) {
        value[0] = Buffer1[place_hold1]>>4;
        i2s.write(value,1);//Send next PWM value to amp
        place_hold1 = place_hold1 + 1;
        if( (place_hold1 >= BufferLen)) {
            led2  = !led2;
            place_hold1 = 0;
            place_hold2 = 0;
            flag1 = 1;
            flag2 = 0;
        }
    } else if(flag2 == 0) {
        value[0] = Buffer2[place_hold2]>>4;
        i2s.write(value,1);//Send next PWM value to amp
        place_hold2 = place_hold2 + 1;
        if( (place_hold2 >= BufferLen) ) {
            led2  = !led2;
            place_hold1 = 0;
            place_hold2 = 0;
            flag1 = 0;
            flag2 = 1;
            FLAGBUFF2 = 0;
        }
    }

    //timer_interrupt.stop();

}
















//function prototypes
classSoundFile ReadFileInfo(classSoundFile Sound, FILE * wav_file);
classSoundFile LoadFileStream(classSoundFile FileInfo, string filename);
void Play_WaveFile(FILE * my_wav, WAV_FILE_STRUCT FileInfo);
void Play_WaveFileDual(FILE * my_wav, WAV_FILE_STRUCT FileInfo);
void Play_WaveFileLoop(classSoundFile Sound1, FILE* wavfile1,classPositionIndicators Positions);

int main()
{

    NotchUp.mode(PullUp);
    NotchDown.mode(PullUp);

    pc.printf("Beginning of program\n");




    printf("Do we even get to this stupid bloody point\n\r");
    //Populate our class instances with some data (is there an implicit way to do this?)


    printf("hello\n\r");
    //Set up the wolfson Audio Codec board
    wm8731_Config_setup();
    //i2s audio data transfer code??
    i2s.stereomono(I2S_STEREO);
    i2s.masterslave(I2S_MASTER);
    led3 = 1;
    led2 = 1;
    printf("Hello i2s has started!");
    i2s.start();
    sampletick.attach(&isr,1.0/sampling_freq);  //1/16000
    
    classPositionIndicators Positions;
    slice1 = Positions.notch7_start_pt;
    FILE* wavfile1 = fopen("/sd/mydir/SoundDecoder_second/All_eight_notches.wav","rb");
    //FILE* wavfile1 = fopen("/sd/mydir/SoundDecoder_second/01.wav","rb");
    classSoundFile Sound1;
    Sound1 = ReadFileInfo(Sound1, wavfile1);
    fseek(wavfile1,Positions.notch7_start_pt,SEEK_SET);
    printf("about to play wav file\n\r");
    Play_WaveFileLoop(Sound1,wavfile1,Positions);
    printf("finished playing Wav file\n\r");


    timer_open.reset();
    timer_open.start();
    fclose(wavfile1);
    timer_open.stop();
    printf("It took %d useconds to close file\n\r",timer_open.read_us());




    /************************************PLAY WAV FILE LOOP*******************/
    /************************************END OF PLAY WAV FILE LOOP*************/


    i2s.stop();

}






classSoundFile ReadFileInfo(classSoundFile Sound, FILE * wav_file)
{
    fseek(wav_file,20,SEEK_SET);
    printf("We have just seeked through this file\n\r");
    fread(&Sound.FileInfo.FileFormat,sizeof(Sound.FileInfo.FileFormat),1,wav_file);
    //printf("wav_format.sample_rate: %d\n\r",FileInfo.FileFormat.sample_rate);

    fread(&Sound.FileInfo.FileData,sizeof(Sound.FileInfo.FileData),1,wav_file);
    printf("wav_data.subchunk2_size: %d\n\r",Sound.FileInfo.FileData.subchunk2_size);
    Sound.FileInfo.slice_buf = ( char *)malloc(Sound.FileInfo.FileFormat.block_align);
    printf("Wav File Block Align (number of bytes per sample!!: %d\n\r", Sound.FileInfo.FileFormat.block_align);
    fread(Sound.FileInfo.slice_buf,Sound.FileInfo.FileFormat.block_align,1,wav_file);   //This isnt actually required, its just a test
    Sound.FileInfo.num_slices = Sound.FileInfo.FileData.subchunk2_size/Sound.FileInfo.FileFormat.block_align;
    //printf("Number of Slices: %d\n\r",FileInfo.num_slices);
    return Sound;
}






void Play_WaveFile(FILE * my_wav, WAV_FILE_STRUCT FileInfo)
{
    while(slice<FileInfo.num_slices) {
        fread(FileInfo.slice_buf,FileInfo.FileFormat.block_align,1,my_wav);
        data_sptr=(short *)FileInfo.slice_buf;     // 16 bit samples
        for (channel=0; channel<FileInfo.FileFormat.num_channels; channel++) {
            if(flag1 == 1) {
                Buffer1[place_hold1] = data_sptr[channel];
                place_hold1 = place_hold1 + 1;
                if(place_hold1 >= BufferLen) {
                    while(1) {
                        if(flag1 == 0) {

                            break;
                        }

                    }
                }

            } else if(flag2 == 1) {
                Buffer2[place_hold2] = data_sptr[channel];
                place_hold2 = place_hold2 + 1;
                if(place_hold2 >= BufferLen) {

                    while(1) {
                        if(flag2 == 0) {

                            break;
                        }
                    }
                }
            }

        }
        slice = slice + 1;
    }
}




//***************************************************************************//

//**************************************************************************//







void Play_WaveFileLoop(classSoundFile Sound1, FILE *wavfile1, classPositionIndicators Positions)
{
    while(1) { //might have to change this to a while(1) loop?





//Sound1=======================================================================================
            if( slice1 == (Positions.notch8_start_pt) ) {
                slice1 = Positions.notch7_start_pt;
                fseek(wavfile1,Positions.notch7_start_pt,SEEK_SET);
            }

            fread(Sound1.FileInfo.slice_buf,Sound1.FileInfo.FileFormat.block_align,1,wavfile1);
            Sound1.data_sptr=(short *)Sound1.FileInfo.slice_buf;     // 16 bit samples
//=============================================================================================

            



        for (channel=0; channel<Sound1.FileInfo.FileFormat.num_channels; channel++) {
            switch (Sound1.FileInfo.FileFormat.sig_bps) {
                case 16:
                    if(flag1 == 1) {
                        Buffer1[place_hold1] = Sound1.data_sptr[channel];
                        place_hold1 = place_hold1 + 1;
                        if(place_hold1 >= BufferLen) {
                            while(1) {
                                if(flag1 == 0) {
                                    break;
                                }//if(flag1 == 0)


                            }//while(1)
                        }//if(place_hold1 > = BufferLen)

                    } else if(flag2 == 1) {
                        Buffer2[place_hold2] = Sound1.data_sptr[channel];
                        place_hold2 = place_hold2 + 1;
                        if(place_hold2 >= BufferLen) {
                            while(1) {

                                if(flag2 == 0) {
                                    break;
                                }
                            }
                        }

                    }
            }
        }
        slice1 = slice1 + 2;//increment up by the number of bytes per Audio data sample!  Makes sense it is 2 bytes, as this is 16-bit data.
        slice2 = slice2 + 1;
        slice3 = slice3 + 1;
    }
}