Rory Hand / Mbed 2 deprecated Wolfson_3_wav

does not work yet. Sound starts but then stops after a few seconds, whole thing hangs. Published so as I can import through mbed CLI.

Dependencies:   mbed sinelookup SDFileSystem_Copy_of_mbed_version I2S

wolfson_3_wav.cpp@6:fd6ae534d120, 2018-10-28 (annotated)

Committer:
roryhand
Date:
Sun Oct 28 16:44:14 2018 +0000
Revision:
6:fd6ae534d120
Parent:
5:5b120a2d9249
Child:
7:fb47ff047ac7
can play 8khz very very fast.  added in extyra conditions for verbosity and isr condition

Who changed what in which revision?

UserRevisionLine numberNew contents of line
roryhand 0:004cb0595aa8 1
roryhand 0:004cb0595aa8 2 // 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.
roryhand 0:004cb0595aa8 3 //however if i use the write function with 4 arguments (as opposed to just 1 argument) then it doesnt work
roryhand 0:004cb0595aa8 4 //only works with the 1 argument version!!!
roryhand 0:004cb0595aa8 5
roryhand 0:004cb0595aa8 6
roryhand 0:004cb0595aa8 7 //THIS VERSION WORKED, CHANGED SOME THINGS, THEN CHANGED THEM BACK. NOW IT NO LONGER WORKS!!!!
roryhand 0:004cb0595aa8 8 #include "mbed.h"
roryhand 0:004cb0595aa8 9 #include "sinelookup.h"
roryhand 0:004cb0595aa8 10 #include "I2S.h"
roryhand 0:004cb0595aa8 11 #define sample_freq 48000
roryhand 0:004cb0595aa8 12 DigitalOut myled(LED1);
roryhand 0:004cb0595aa8 13 DigitalOut led2(LED2);
roryhand 0:004cb0595aa8 14 DigitalOut led3(LED3);
roryhand 0:004cb0595aa8 15 Ticker sampletick;
roryhand 0:004cb0595aa8 16 Timer t;
roryhand 6:fd6ae534d120 17 Timer t2;
roryhand 0:004cb0595aa8 18 #include "SDFileSystem.h"
roryhand 0:004cb0595aa8 19 #include "WOLFSON_config.h"
roryhand 0:004cb0595aa8 20 Serial pc(USBTX, USBRX); // tx, rx //FOR DEBUGGING PROGRAM USING GNU SCREEN
roryhand 0:004cb0595aa8 21 DigitalOut cs(p8);
roryhand 0:004cb0595aa8 22 I2S i2s(I2S_TRANSMIT,p5,p6,p7);
roryhand 0:004cb0595aa8 23 I2C i2c(p9, p10);
roryhand 0:004cb0595aa8 24
roryhand 0:004cb0595aa8 25 SDFileSystem sd(p11, p12, p13, p8, "sd"); // the new pinout that i am using
roryhand 0:004cb0595aa8 26
roryhand 0:004cb0595aa8 27 typedef struct uFMT_STRUCT{
roryhand 0:004cb0595aa8 28 short comp_code;
roryhand 0:004cb0595aa8 29 short num_channels;
roryhand 0:004cb0595aa8 30 unsigned sample_rate;
roryhand 0:004cb0595aa8 31 unsigned avg_Bps;
roryhand 0:004cb0595aa8 32 short block_align;
roryhand 0:004cb0595aa8 33 short sig_bps;
roryhand 0:004cb0595aa8 34 } FMT_STRUCT;
roryhand 0:004cb0595aa8 35
roryhand 0:004cb0595aa8 36 typedef struct uDATA_STRUCT {
roryhand 0:004cb0595aa8 37 unsigned subchunk2_ID;
roryhand 0:004cb0595aa8 38 unsigned subchunk2_size;
roryhand 0:004cb0595aa8 39 char * data_buf;
roryhand 0:004cb0595aa8 40 }DATA_STRUCT;
roryhand 0:004cb0595aa8 41 short hello;
roryhand 0:004cb0595aa8 42 int i = 0;
roryhand 0:004cb0595aa8 43 int h = 0;
roryhand 0:004cb0595aa8 44 int bufflen = 1;
roryhand 0:004cb0595aa8 45 int buffer[1];
roryhand 0:004cb0595aa8 46 int AudioFormat, NumChannels, SampleRate, BitsPerSample ;
roryhand 0:004cb0595aa8 47 char *slice_buf;
roryhand 5:5b120a2d9249 48 short *data_sptr;
roryhand 3:6fba0a044d85 49 unsigned char *data_bptr;
roryhand 3:6fba0a044d85 50 int *data_wptr;
roryhand 3:6fba0a044d85 51 unsigned channel;
roryhand 0:004cb0595aa8 52 int newvar;
roryhand 3:6fba0a044d85 53 long slice, num_slices;
roryhand 3:6fba0a044d85 54 int verbosity = 0;
roryhand 6:fd6ae534d120 55 int interrupt_condition = 0;
roryhand 6:fd6ae534d120 56 int sampling_freq = 48000;
roryhand 6:fd6ae534d120 57 int Buffer1[512];
roryhand 6:fd6ae534d120 58 int Buffer2[512];
roryhand 6:fd6ae534d120 59 int place_hold1;
roryhand 6:fd6ae534d120 60 int place_hold2;
roryhand 0:004cb0595aa8 61 //long long slice_value;
roryhand 5:5b120a2d9249 62 int slice_value[1];
roryhand 0:004cb0595aa8 63 FILE *my_wav;
roryhand 0:004cb0595aa8 64 FMT_STRUCT wav_format;
roryhand 0:004cb0595aa8 65 DATA_STRUCT wav_data;
roryhand 0:004cb0595aa8 66
roryhand 0:004cb0595aa8 67 Ticker flipper;
roryhand 0:004cb0595aa8 68 //test
roryhand 0:004cb0595aa8 69 void flip() {
roryhand 0:004cb0595aa8 70 led2 = !led2;
roryhand 0:004cb0595aa8 71 }
roryhand 0:004cb0595aa8 72
roryhand 0:004cb0595aa8 73
roryhand 0:004cb0595aa8 74 void isr()
roryhand 0:004cb0595aa8 75 {
roryhand 3:6fba0a044d85 76 buffer[0] = (*data_sptr)>>1;
roryhand 3:6fba0a044d85 77 myled = 1;
roryhand 3:6fba0a044d85 78 int bufflen = sizeof(buffer);
roryhand 5:5b120a2d9249 79 if(verbosity){
roryhand 4:1a9482a07ee2 80 printf("buffer data: %d \n\r",buffer);
roryhand 4:1a9482a07ee2 81 printf("data_sptr data: %d \n\r",data_sptr);
roryhand 5:5b120a2d9249 82 }
roryhand 6:fd6ae534d120 83
roryhand 0:004cb0595aa8 84 //buffer[0] = (int*)data_sptr;
roryhand 0:004cb0595aa8 85 //buffer[0] = newvar;
roryhand 0:004cb0595aa8 86 //buffer[0] = sine16lookup[i];//>>1;//sine16lookup[i];//scale down volume a bit on amp//how would this scale down the volume a bit??
roryhand 0:004cb0595aa8 87 //buffer[0] = *fp;
roryhand 0:004cb0595aa8 88 //printf("value: %d",data_sptr);
roryhand 6:fd6ae534d120 89 t.start();
roryhand 4:1a9482a07ee2 90 i2s.write(data_sptr, bufflen);//Send next PWM value to amp
roryhand 6:fd6ae534d120 91 t.stop();
roryhand 6:fd6ae534d120 92 printf("The time taken was %f seconds\n", t.read());
roryhand 6:fd6ae534d120 93 t.reset();
roryhand 3:6fba0a044d85 94 myled = 0;
roryhand 0:004cb0595aa8 95 }
roryhand 1:ec4e2020522c 96
roryhand 0:004cb0595aa8 97
roryhand 1:ec4e2020522c 98
roryhand 0:004cb0595aa8 99
roryhand 0:004cb0595aa8 100 void wm8731_setup(int chip_addr, int addr, int cmd){
roryhand 0:004cb0595aa8 101 addr = addr << 1;
roryhand 0:004cb0595aa8 102 addr = addr|((cmd >> 8 ))& 0x01;//mess around with order of operations
roryhand 0:004cb0595aa8 103 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 104 i2c.start();
roryhand 0:004cb0595aa8 105 i2c.write( chip_addr );
roryhand 0:004cb0595aa8 106 i2c.write( addr );
roryhand 0:004cb0595aa8 107 i2c.write( cmd );
roryhand 0:004cb0595aa8 108 i2c.stop();
roryhand 0:004cb0595aa8 109 }
roryhand 0:004cb0595aa8 110
roryhand 0:004cb0595aa8 111
roryhand 0:004cb0595aa8 112 void wm8731_config(void){
roryhand 0:004cb0595aa8 113 wm8731_setup( WM8731_ADDRESS, WM8731_REG_RESET, _WM8731_RESET );//1
roryhand 0:004cb0595aa8 114 wm8731_setup( WM8731_ADDRESS, WM8731_REG_LLINE_IN, _WM8731_LEFT_LINEIN );//2
roryhand 0:004cb0595aa8 115 wm8731_setup( WM8731_ADDRESS, WM8731_REG_RLINE_IN, _WM8731_RIGHT_LINEIN );//3
roryhand 0:004cb0595aa8 116 wm8731_setup( WM8731_ADDRESS, WM8731_REG_LHPHONE_OUT, _WM8731_LEFT_HP );//4
roryhand 0:004cb0595aa8 117 wm8731_setup( WM8731_ADDRESS, WM8731_REG_RHPHONE_OUT, _WM8731_RIGHT_HP );//5
roryhand 0:004cb0595aa8 118 wm8731_setup( WM8731_ADDRESS, WM8731_REG_ANALOG_PATH, _WM8731_ANALOGAUDIO );//6
roryhand 0:004cb0595aa8 119 wm8731_setup( WM8731_ADDRESS, WM8731_REG_DIGITAL_PATH, _WM8731_DIGITALAUDIO );//7
roryhand 0:004cb0595aa8 120 wm8731_setup( WM8731_ADDRESS, WM8731_REG_PDOWN_CTRL, _WM8731_POWER );//8
roryhand 0:004cb0595aa8 121 wm8731_setup( WM8731_ADDRESS, WM8731_REG_DIGITAL_IF, _WM8731_DAIF );//9
roryhand 0:004cb0595aa8 122 wm8731_setup( WM8731_ADDRESS, WM8731_REG_SAMPLING_CTRL, _WM8731_SAMPLING );//10
roryhand 0:004cb0595aa8 123 }
roryhand 0:004cb0595aa8 124
roryhand 0:004cb0595aa8 125 void wm8731_configTEST(void){
roryhand 0:004cb0595aa8 126 int addr = WM8731_REG_RESET;
roryhand 0:004cb0595aa8 127 int cmd = _WM8731_RESET;
roryhand 0:004cb0595aa8 128 addr = addr << 1;
roryhand 0:004cb0595aa8 129 addr = addr|((cmd >> 8 ))& 0x01;//mess around with order of operations
roryhand 0:004cb0595aa8 130 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 131 i2c.start();
roryhand 0:004cb0595aa8 132 i2c.write( WM8731_ADDRESS );
roryhand 0:004cb0595aa8 133 i2c.write( addr );
roryhand 0:004cb0595aa8 134 i2c.write( cmd );
roryhand 0:004cb0595aa8 135 i2c.stop();
roryhand 0:004cb0595aa8 136
roryhand 0:004cb0595aa8 137 addr = WM8731_REG_LLINE_IN;
roryhand 0:004cb0595aa8 138 cmd = _WM8731_LEFT_LINEIN;
roryhand 0:004cb0595aa8 139 addr = addr << 1;
roryhand 0:004cb0595aa8 140 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 141 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 142 i2c.start();
roryhand 0:004cb0595aa8 143 i2c.write( WM8731_ADDRESS );//take Fergus' suggestion and declare these to known values EARLIER in program
roryhand 0:004cb0595aa8 144 i2c.write( addr );
roryhand 0:004cb0595aa8 145 i2c.write( cmd );
roryhand 0:004cb0595aa8 146 i2c.stop();
roryhand 0:004cb0595aa8 147
roryhand 0:004cb0595aa8 148
roryhand 0:004cb0595aa8 149 addr = WM8731_REG_RLINE_IN;
roryhand 0:004cb0595aa8 150 cmd = _WM8731_RIGHT_LINEIN;
roryhand 0:004cb0595aa8 151 addr = addr << 1;
roryhand 0:004cb0595aa8 152 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 153 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 154 i2c.start();
roryhand 0:004cb0595aa8 155 i2c.write( WM8731_ADDRESS );//take Fergus' suggestion and declare these to known values EARLIER in program
roryhand 0:004cb0595aa8 156 i2c.write( addr );
roryhand 0:004cb0595aa8 157 i2c.write( cmd );
roryhand 0:004cb0595aa8 158 i2c.stop();
roryhand 0:004cb0595aa8 159
roryhand 0:004cb0595aa8 160
roryhand 0:004cb0595aa8 161 //4
roryhand 0:004cb0595aa8 162 addr = WM8731_REG_LHPHONE_OUT;
roryhand 0:004cb0595aa8 163 cmd = _WM8731_LEFT_HP;
roryhand 0:004cb0595aa8 164 addr = addr << 1;
roryhand 0:004cb0595aa8 165 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 166 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 167 i2c.start();
roryhand 0:004cb0595aa8 168 i2c.write( WM8731_ADDRESS );
roryhand 0:004cb0595aa8 169 i2c.write( addr );//WM8731_REG_LHPHONE_OUT, _WM8731_LEFT_HP
roryhand 0:004cb0595aa8 170 i2c.write(cmd);
roryhand 0:004cb0595aa8 171 i2c.stop();
roryhand 0:004cb0595aa8 172
roryhand 0:004cb0595aa8 173 //5
roryhand 0:004cb0595aa8 174 addr = WM8731_REG_RHPHONE_OUT;
roryhand 0:004cb0595aa8 175 cmd = _WM8731_RIGHT_HP;
roryhand 0:004cb0595aa8 176 addr = addr << 1;
roryhand 0:004cb0595aa8 177 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 178 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 179 i2c.start();
roryhand 0:004cb0595aa8 180 i2c.write( WM8731_ADDRESS );//WM8731_REG_RHPHONE_OUT, _WM8731_RIGHT_HP
roryhand 0:004cb0595aa8 181 i2c.write( addr );
roryhand 0:004cb0595aa8 182 i2c.write( cmd );
roryhand 0:004cb0595aa8 183 i2c.stop();
roryhand 0:004cb0595aa8 184
roryhand 0:004cb0595aa8 185
roryhand 0:004cb0595aa8 186 //6
roryhand 0:004cb0595aa8 187 addr = WM8731_REG_ANALOG_PATH;
roryhand 0:004cb0595aa8 188 cmd = _WM8731_ANALOGAUDIO;
roryhand 0:004cb0595aa8 189 addr = addr << 1;
roryhand 0:004cb0595aa8 190 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 191 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 192 i2c.start();
roryhand 0:004cb0595aa8 193 i2c.write( WM8731_ADDRESS );//WM8731_REG_ANALOG_PATH, _WM8731_ANALOGAUDIO
roryhand 0:004cb0595aa8 194 i2c.write( addr );
roryhand 0:004cb0595aa8 195 i2c.write( cmd );
roryhand 0:004cb0595aa8 196 i2c.stop();
roryhand 0:004cb0595aa8 197
roryhand 0:004cb0595aa8 198 //7
roryhand 0:004cb0595aa8 199 addr = WM8731_REG_DIGITAL_PATH;
roryhand 0:004cb0595aa8 200 cmd = _WM8731_DIGITALAUDIO;
roryhand 0:004cb0595aa8 201 addr = addr << 1;
roryhand 0:004cb0595aa8 202 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 203 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 204 i2c.start();
roryhand 0:004cb0595aa8 205 i2c.write( WM8731_ADDRESS );//WM8731_REG_DIGITAL_PATH, _WM8731_DIGITALAUDIO
roryhand 0:004cb0595aa8 206 i2c.write( addr );
roryhand 0:004cb0595aa8 207 i2c.write( cmd );
roryhand 0:004cb0595aa8 208 i2c.stop();
roryhand 0:004cb0595aa8 209
roryhand 0:004cb0595aa8 210 //8
roryhand 0:004cb0595aa8 211 addr = WM8731_REG_PDOWN_CTRL;
roryhand 0:004cb0595aa8 212 cmd = _WM8731_POWER;
roryhand 0:004cb0595aa8 213 addr = addr << 1;
roryhand 0:004cb0595aa8 214 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 215 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 216 i2c.start();
roryhand 0:004cb0595aa8 217 i2c.write( WM8731_ADDRESS );//WM8731_REG_PDOWN_CTRL, _WM8731_POWER)
roryhand 0:004cb0595aa8 218 i2c.write( addr );
roryhand 0:004cb0595aa8 219 i2c.write( cmd );
roryhand 0:004cb0595aa8 220 i2c.stop();
roryhand 0:004cb0595aa8 221
roryhand 0:004cb0595aa8 222
roryhand 0:004cb0595aa8 223 //9
roryhand 0:004cb0595aa8 224 addr = WM8731_REG_DIGITAL_IF;
roryhand 0:004cb0595aa8 225 cmd = _WM8731_DAIF;
roryhand 0:004cb0595aa8 226 addr = addr << 1;
roryhand 0:004cb0595aa8 227 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 228 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 229 i2c.start();
roryhand 0:004cb0595aa8 230 i2c.write( WM8731_ADDRESS );
roryhand 0:004cb0595aa8 231 i2c.write( addr );//WM8731_REG_DIGITAL_IF, _WM8731_DAIF
roryhand 0:004cb0595aa8 232 i2c.write( cmd );
roryhand 0:004cb0595aa8 233 i2c.stop();
roryhand 0:004cb0595aa8 234
roryhand 0:004cb0595aa8 235
roryhand 0:004cb0595aa8 236 //10
roryhand 0:004cb0595aa8 237 addr = WM8731_REG_SAMPLING_CTRL;
roryhand 0:004cb0595aa8 238 cmd = _WM8731_SAMPLING;
roryhand 0:004cb0595aa8 239 addr = addr << 1;
roryhand 0:004cb0595aa8 240 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 241 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 242 i2c.start();
roryhand 0:004cb0595aa8 243 i2c.write( WM8731_ADDRESS );//WM8731_REG_SAMPLING_CTRL, _WM8731_SAMPLING
roryhand 0:004cb0595aa8 244 i2c.write( addr );
roryhand 0:004cb0595aa8 245 i2c.write( cmd );
roryhand 0:004cb0595aa8 246 i2c.stop();
roryhand 0:004cb0595aa8 247
roryhand 0:004cb0595aa8 248
roryhand 0:004cb0595aa8 249
roryhand 0:004cb0595aa8 250
roryhand 0:004cb0595aa8 251 //11
roryhand 0:004cb0595aa8 252 addr = WM8731_REG_ACTIVE_CTRL;
roryhand 0:004cb0595aa8 253 cmd = _WM8731_ACTIVATE;
roryhand 0:004cb0595aa8 254 addr = addr << 1;
roryhand 0:004cb0595aa8 255 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 256 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 257 i2c.start();
roryhand 0:004cb0595aa8 258 i2c.write( WM8731_ADDRESS );//WM8731_REG_SAMPLING_CTRL, _WM8731_SAMPLING
roryhand 0:004cb0595aa8 259 i2c.write( addr );
roryhand 0:004cb0595aa8 260 i2c.write( cmd );//there is also a deactive version!!
roryhand 0:004cb0595aa8 261 i2c.stop();
roryhand 0:004cb0595aa8 262
roryhand 0:004cb0595aa8 263
roryhand 0:004cb0595aa8 264
roryhand 0:004cb0595aa8 265 }
roryhand 0:004cb0595aa8 266
roryhand 0:004cb0595aa8 267 int main() {
roryhand 0:004cb0595aa8 268 FMT_STRUCT wav_format;
roryhand 0:004cb0595aa8 269 char data[2];
roryhand 0:004cb0595aa8 270 pc.printf("Beginning of program\n");
roryhand 0:004cb0595aa8 271 data[0] = 0x0F;
roryhand 0:004cb0595aa8 272 data[1] = 0x00;
roryhand 0:004cb0595aa8 273 FILE *my_wav;
roryhand 0:004cb0595aa8 274 //my_wav = fopen("/sd/mydir/gp40.wav", "rb");//i think that it is "w" for write, "r" for read.
roryhand 5:5b120a2d9249 275 //my_wav = fopen("/sd/mydir/gp40_48K.wav", "rb");//i think that it is "w" for write, "r" for read.
roryhand 5:5b120a2d9249 276 //my_wav = fopen("/sd/mydir/gp40_48K_quieter.wav", "rb");//i think that it is "w" for write, "r" for read.
roryhand 5:5b120a2d9249 277 my_wav = fopen("/sd/mydir/gp40_8K.wav","rb");
roryhand 5:5b120a2d9249 278 //my_wav = fopen("/sd/mydir/emd_645.wav", "rb");
roryhand 0:004cb0595aa8 279 fseek(my_wav, 20, SEEK_SET); // set pointer to byte 20
roryhand 0:004cb0595aa8 280 fread(&AudioFormat, 2, 1, my_wav); // check file is PCM
roryhand 0:004cb0595aa8 281 if (AudioFormat==0x01) {
roryhand 0:004cb0595aa8 282 printf("Wav file is PCM data\n\r");
roryhand 0:004cb0595aa8 283 }
roryhand 0:004cb0595aa8 284 else {
roryhand 0:004cb0595aa8 285 printf("Wav file is not PCM data\n\r");
roryhand 0:004cb0595aa8 286 }
roryhand 0:004cb0595aa8 287
roryhand 0:004cb0595aa8 288 fseek (my_wav,20,SEEK_SET);
roryhand 0:004cb0595aa8 289 fread(&wav_format,sizeof(wav_format),1,my_wav);
roryhand 0:004cb0595aa8 290 printf("%d block align\n",wav_format.block_align);
roryhand 0:004cb0595aa8 291 printf(" %d channels\n",wav_format.num_channels);
roryhand 0:004cb0595aa8 292
roryhand 0:004cb0595aa8 293
roryhand 0:004cb0595aa8 294 fseek(my_wav, 36, SEEK_SET);
roryhand 0:004cb0595aa8 295 fread(&wav_data.subchunk2_ID,4,1,my_wav);
roryhand 0:004cb0595aa8 296 fseek(my_wav, 40, SEEK_SET);
roryhand 0:004cb0595aa8 297 fread(&wav_data.subchunk2_size,4,1,my_wav);
roryhand 0:004cb0595aa8 298 printf("DATA chunck\n");
roryhand 0:004cb0595aa8 299 printf(" %d subchunk 2 ID\n",wav_data.subchunk2_ID);
roryhand 0:004cb0595aa8 300 printf(" %d subchunk 2 size\n",wav_data.subchunk2_size);
roryhand 0:004cb0595aa8 301
roryhand 0:004cb0595aa8 302
roryhand 0:004cb0595aa8 303
roryhand 0:004cb0595aa8 304
roryhand 0:004cb0595aa8 305
roryhand 0:004cb0595aa8 306
roryhand 0:004cb0595aa8 307 i2c.frequency(100000);
roryhand 0:004cb0595aa8 308 long j = 0;
roryhand 0:004cb0595aa8 309
roryhand 0:004cb0595aa8 310 printf("set up the codec\n\r");
roryhand 3:6fba0a044d85 311 while(j <1000){
roryhand 0:004cb0595aa8 312 wm8731_configTEST();
roryhand 3:6fba0a044d85 313 j = j + 1;
roryhand 3:6fba0a044d85 314 }
roryhand 0:004cb0595aa8 315 //i2s audio data transfer code??
roryhand 0:004cb0595aa8 316 i2s.stereomono(I2S_STEREO);
roryhand 0:004cb0595aa8 317 i2s.masterslave(I2S_MASTER);//MASTER definitely works!
roryhand 0:004cb0595aa8 318 i2s.frequency(sample_freq);
roryhand 0:004cb0595aa8 319 int yes = i2s.setup_ok();
roryhand 0:004cb0595aa8 320 pc.printf("Setup went ok?: %d\n", yes);//0 = ack, 1 = Nack*/
roryhand 0:004cb0595aa8 321 printf("can we get to this point? 1\n\r");
roryhand 0:004cb0595aa8 322 led3 = 1;
roryhand 0:004cb0595aa8 323 //myled = 1;
roryhand 0:004cb0595aa8 324 led2 = 1;
roryhand 0:004cb0595aa8 325 printf("can we get to this point? 2\n\r");
roryhand 0:004cb0595aa8 326
roryhand 0:004cb0595aa8 327 myled = 1;
roryhand 0:004cb0595aa8 328 i2s.start();
roryhand 0:004cb0595aa8 329 //while (1) {
roryhand 0:004cb0595aa8 330 fread(&wav_format,sizeof(wav_format),1,my_wav);
roryhand 0:004cb0595aa8 331 printf("wav_format %d\n\r",wav_format);
roryhand 1:ec4e2020522c 332
roryhand 0:004cb0595aa8 333
roryhand 0:004cb0595aa8 334 fseek(my_wav,20,SEEK_SET);
roryhand 0:004cb0595aa8 335 fread(&wav_format,sizeof(wav_format),1,my_wav);
roryhand 0:004cb0595aa8 336 fseek(my_wav,36,SEEK_SET);
roryhand 0:004cb0595aa8 337 fread(&wav_data,sizeof(wav_data),1,my_wav);
roryhand 2:05b426733282 338 int num_slices = wav_data.subchunk2_size/wav_format.block_align;
roryhand 0:004cb0595aa8 339 printf("wav_data.subchunk2_size: %d\n\r",wav_data.subchunk2_size);
roryhand 0:004cb0595aa8 340 printf("wav_format.block_align: %d\n\r",wav_format.block_align);
roryhand 0:004cb0595aa8 341 printf("num_slices: %d\n\r",num_slices);
roryhand 0:004cb0595aa8 342 printf("num_slices*wav_format.block_align %d\n\r",num_slices*wav_format.block_align);
roryhand 0:004cb0595aa8 343 printf("wav_format.num_channels*wav_format.sig_bps/8: %d\n\r",wav_format.num_channels*wav_format.sig_bps/8);
roryhand 3:6fba0a044d85 344 printf("chunk_size - sizeof(wav_format) %d\n\r",wav_data.subchunk2_size-sizeof(wav_format));
roryhand 0:004cb0595aa8 345 printf("sizeof(wav_format): %d\n\r",sizeof(wav_format));
roryhand 3:6fba0a044d85 346 printf("do we egt to this point:\n\r");
roryhand 6:fd6ae534d120 347 if (interrupt_condition == 1)
roryhand 6:fd6ae534d120 348 {
roryhand 6:fd6ae534d120 349 sampletick.attach(&isr,10.0);
roryhand 6:fd6ae534d120 350 }
roryhand 6:fd6ae534d120 351
roryhand 5:5b120a2d9249 352 //sampletick.attach(&isr,1000000/48000);
roryhand 0:004cb0595aa8 353 //while(!feof(my_wav)){
roryhand 0:004cb0595aa8 354 //while(1){
roryhand 0:004cb0595aa8 355 //if (wav_data.subchunk2_size > sizeof(wav_format)){
roryhand 0:004cb0595aa8 356 //fseek(my_wav,wav_data.subchunk2_size-sizeof(wav_format),SEEK_CUR);
roryhand 0:004cb0595aa8 357 /*if(wav_data.subchunk2_size > (num_slices*wav_format.block_align)){
roryhand 0:004cb0595aa8 358 fseek(my_wav,wav_data.subchunk2_size - (num_slices*wav_format.block_align),SEEK_CUR);
roryhand 0:004cb0595aa8 359 printf("chunk_size - sizeof(wav_format) %d\n\r",wav_data.subchunk2_size-sizeof(wav_format));
roryhand 0:004cb0595aa8 360 printf("sizeof(wav_format): %d\n\r",sizeof(wav_format));
roryhand 0:004cb0595aa8 361 }
roryhand 0:004cb0595aa8 362 else {
roryhand 0:004cb0595aa8 363
roryhand 0:004cb0595aa8 364 break;
roryhand 0:004cb0595aa8 365 }*/
roryhand 0:004cb0595aa8 366
roryhand 3:6fba0a044d85 367 slice_buf=(char *)malloc(wav_format.block_align);
roryhand 2:05b426733282 368 for (slice=0;slice<num_slices;slice+=1) {
roryhand 6:fd6ae534d120 369 t2.start();
roryhand 3:6fba0a044d85 370 fread(slice_buf,wav_format.block_align,1,my_wav);//THIS IS WHERE HE READS IN THE DATA, TO SLICE_BUF. BUT USES WAV_FORMAT.BLOCKALIGN AS HIS SIZE GUIDE
roryhand 2:05b426733282 371 //I do not understand why he is not "seeking" through the file first though...
roryhand 3:6fba0a044d85 372 if (feof(my_wav)){
roryhand 2:05b426733282 373 printf("Oops -- not enough slices in the wave file\n");
roryhand 2:05b426733282 374 exit(1);
roryhand 2:05b426733282 375 }
roryhand 5:5b120a2d9249 376 data_sptr=(short *)slice_buf; // 16 bit samples
roryhand 2:05b426733282 377 data_bptr=(unsigned char *)slice_buf; // 8 bit samples
roryhand 2:05b426733282 378 data_wptr=(int *)slice_buf; // 32 bit samples
roryhand 5:5b120a2d9249 379 slice_value[1]=0;
roryhand 2:05b426733282 380 for (channel=0;channel<wav_format.num_channels;channel++) {
roryhand 2:05b426733282 381 switch (wav_format.sig_bps) {
roryhand 2:05b426733282 382 case 16:
roryhand 5:5b120a2d9249 383 int mybuffer[1];
roryhand 5:5b120a2d9249 384 mybuffer[0] = data_sptr[channel];// - 32768;
roryhand 6:fd6ae534d120 385 if(interrupt_condition==1)
roryhand 6:fd6ae534d120 386 {
roryhand 6:fd6ae534d120 387
roryhand 6:fd6ae534d120 388
roryhand 6:fd6ae534d120 389 }
roryhand 6:fd6ae534d120 390 else
roryhand 6:fd6ae534d120 391 {
roryhand 6:fd6ae534d120 392 if(verbosity == 1)
roryhand 6:fd6ae534d120 393 {
roryhand 6:fd6ae534d120 394 t.start();
roryhand 6:fd6ae534d120 395 i2s.write(data_sptr,2);
roryhand 6:fd6ae534d120 396 t.stop();
roryhand 6:fd6ae534d120 397 printf("The time taken was %f seconds\n", t.read());
roryhand 6:fd6ae534d120 398 t.reset();
roryhand 6:fd6ae534d120 399 }
roryhand 6:fd6ae534d120 400
roryhand 6:fd6ae534d120 401 else
roryhand 6:fd6ae534d120 402 {
roryhand 6:fd6ae534d120 403
roryhand 6:fd6ae534d120 404 i2s.write(data_sptr,2);
roryhand 6:fd6ae534d120 405
roryhand 6:fd6ae534d120 406 }
roryhand 6:fd6ae534d120 407
roryhand 6:fd6ae534d120 408 if(sampling_freq == 48000)
roryhand 6:fd6ae534d120 409 {
roryhand 6:fd6ae534d120 410 wait_us(0.1);
roryhand 6:fd6ae534d120 411 }
roryhand 6:fd6ae534d120 412 else if(sampling_freq == 8000)
roryhand 6:fd6ae534d120 413 {
roryhand 6:fd6ae534d120 414 wait_us(2);
roryhand 6:fd6ae534d120 415 }
roryhand 6:fd6ae534d120 416 }
roryhand 6:fd6ae534d120 417
roryhand 6:fd6ae534d120 418
roryhand 6:fd6ae534d120 419
roryhand 6:fd6ae534d120 420
roryhand 6:fd6ae534d120 421
roryhand 2:05b426733282 422 if (verbosity)
roryhand 5:5b120a2d9249 423 printf("16 bit channel %d data=%d\n\r ",channel,data_sptr[channel]);
roryhand 5:5b120a2d9249 424 slice_value[1]+=data_sptr[channel];
roryhand 2:05b426733282 425 break;
roryhand 2:05b426733282 426 case 32:
roryhand 2:05b426733282 427 if (verbosity)
roryhand 2:05b426733282 428 printf("32 bit channel %d data=%d ",channel,data_wptr[channel]);
roryhand 5:5b120a2d9249 429 slice_value[1]+=data_wptr[channel];
roryhand 2:05b426733282 430 break;
roryhand 2:05b426733282 431 case 8:
roryhand 2:05b426733282 432 if (verbosity)
roryhand 2:05b426733282 433 printf("8 bit channel %d data=%d ",channel,(int)data_bptr[channel]);
roryhand 5:5b120a2d9249 434 slice_value[1]+=data_bptr[channel];
roryhand 2:05b426733282 435 break;
roryhand 2:05b426733282 436 }
roryhand 2:05b426733282 437 }
roryhand 5:5b120a2d9249 438 slice_value[1]/=wav_format.num_channels;
roryhand 2:05b426733282 439
roryhand 2:05b426733282 440 // slice_value is now averaged. Next it needs to be scaled to an unsigned 16 bit value
roryhand 2:05b426733282 441 // with DC offset so it can be written to the DAC.
roryhand 2:05b426733282 442 switch (wav_format.sig_bps) {
roryhand 5:5b120a2d9249 443 case 8: slice_value[1]<<=8;
roryhand 2:05b426733282 444 break;
roryhand 5:5b120a2d9249 445 case 16: slice_value[1]+=32768;
roryhand 2:05b426733282 446 break;
roryhand 5:5b120a2d9249 447 case 32: slice_value[1]>>=16;
roryhand 5:5b120a2d9249 448 slice_value[1]+=32768;
roryhand 2:05b426733282 449 break;
roryhand 2:05b426733282 450 }
roryhand 5:5b120a2d9249 451 if (verbosity)
roryhand 5:5b120a2d9249 452 {
roryhand 5:5b120a2d9249 453 printf("data_sptr data: %d \n\r",data_sptr);
roryhand 5:5b120a2d9249 454 printf("slice_value data: %d \n\r",slice_value);
roryhand 5:5b120a2d9249 455 }
roryhand 5:5b120a2d9249 456 int mynewvar[1];
roryhand 5:5b120a2d9249 457 //i2s.write(data_sptr,2);
roryhand 6:fd6ae534d120 458 t2.stop();
roryhand 6:fd6ae534d120 459 printf("The time taken was %f seconds\n", t2.read());
roryhand 6:fd6ae534d120 460 t2.reset();
roryhand 3:6fba0a044d85 461 }
roryhand 3:6fba0a044d85 462 /* dac_data=(short unsigned)slice_value;
roryhand 2:05b426733282 463 if (verbosity)
roryhand 2:05b426733282 464 printf("sample %d wptr %d slice_value %d dac_data %u\n",slice,DAC_wptr,(int)slice_value,dac_data);
roryhand 2:05b426733282 465 DAC_fifo[DAC_wptr]=dac_data;
roryhand 2:05b426733282 466 DAC_wptr=(DAC_wptr+1) & 0xff;
roryhand 2:05b426733282 467 while (DAC_wptr==DAC_rptr) {
roryhand 2:05b426733282 468 }
roryhand 3:6fba0a044d85 469 }*/
roryhand 3:6fba0a044d85 470
roryhand 2:05b426733282 471
roryhand 6:fd6ae534d120 472 if(interrupt_condition == 1)
roryhand 6:fd6ae534d120 473 {
roryhand 6:fd6ae534d120 474
roryhand 6:fd6ae534d120 475 sampletick.detach();
roryhand 6:fd6ae534d120 476 }
roryhand 6:fd6ae534d120 477
roryhand 0:004cb0595aa8 478 i2s.stop();
roryhand 0:004cb0595aa8 479
roryhand 0:004cb0595aa8 480 fclose(my_wav);
roryhand 0:004cb0595aa8 481 printf("File is now closed.");
roryhand 0:004cb0595aa8 482 return 0;
roryhand 0:004cb0595aa8 483 }
roryhand 0:004cb0595aa8 484