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@7:fb47ff047ac7, 2018-10-28 (annotated)

Committer:
roryhand
Date:
Sun Oct 28 21:31:58 2018 +0000
Revision:
7:fb47ff047ac7
Parent:
6:fd6ae534d120
Child:
8:40f37287589a
we are now playing sound throughg codec with intwrrupt and block processing.  however, it is either stopping file early, OR  irunning it way too fast.

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 7:fb47ff047ac7 44 short 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 7:fb47ff047ac7 55 int interrupt_condition = 1;
roryhand 6:fd6ae534d120 56 int sampling_freq = 48000;
roryhand 7:fb47ff047ac7 57 short Buffer1[8];
roryhand 7:fb47ff047ac7 58 short Buffer2[8];
roryhand 7:fb47ff047ac7 59 short place_hold1 = 0;
roryhand 7:fb47ff047ac7 60 short place_hold2 = 0;
roryhand 7:fb47ff047ac7 61 int flag1 = 1;
roryhand 7:fb47ff047ac7 62 int flag2 = 0;
roryhand 7:fb47ff047ac7 63 int flag3 = 1;
roryhand 7:fb47ff047ac7 64 int flag4 = 0;
roryhand 7:fb47ff047ac7 65 short value[1];
roryhand 0:004cb0595aa8 66 //long long slice_value;
roryhand 5:5b120a2d9249 67 int slice_value[1];
roryhand 0:004cb0595aa8 68 FILE *my_wav;
roryhand 0:004cb0595aa8 69 FMT_STRUCT wav_format;
roryhand 0:004cb0595aa8 70 DATA_STRUCT wav_data;
roryhand 0:004cb0595aa8 71
roryhand 0:004cb0595aa8 72 Ticker flipper;
roryhand 0:004cb0595aa8 73 //test
roryhand 0:004cb0595aa8 74 void flip() {
roryhand 0:004cb0595aa8 75 led2 = !led2;
roryhand 0:004cb0595aa8 76 }
roryhand 0:004cb0595aa8 77
roryhand 0:004cb0595aa8 78
roryhand 0:004cb0595aa8 79 void isr()
roryhand 0:004cb0595aa8 80 {
roryhand 7:fb47ff047ac7 81 //buffer[0] = (*data_sptr)>>1;
roryhand 7:fb47ff047ac7 82 //myled = 1;
roryhand 7:fb47ff047ac7 83 //int bufflen = sizeof(buffer);
roryhand 5:5b120a2d9249 84 if(verbosity){
roryhand 4:1a9482a07ee2 85 printf("buffer data: %d \n\r",buffer);
roryhand 7:fb47ff047ac7 86 printf("data_sptr data: %d",data_sptr);
roryhand 7:fb47ff047ac7 87 short value = Buffer1[0];
roryhand 7:fb47ff047ac7 88 printf("value: %d",value);
roryhand 5:5b120a2d9249 89 }
roryhand 7:fb47ff047ac7 90 //t.start();
roryhand 6:fd6ae534d120 91
roryhand 7:fb47ff047ac7 92 //t.stop();
roryhand 7:fb47ff047ac7 93 //printf("The time taken was %f seconds\n", t.read());
roryhand 7:fb47ff047ac7 94 //t.reset();
roryhand 7:fb47ff047ac7 95 //myled = 0;
roryhand 7:fb47ff047ac7 96 if(flag1 == 0)
roryhand 7:fb47ff047ac7 97 {
roryhand 7:fb47ff047ac7 98 //access double buffer pt1
roryhand 7:fb47ff047ac7 99 value[0] = Buffer1[place_hold1];
roryhand 7:fb47ff047ac7 100 i2s.write(value,1);//Send next PWM value to amp
roryhand 7:fb47ff047ac7 101 place_hold1 = place_hold1 + 1;
roryhand 7:fb47ff047ac7 102 if(place_hold1 == 8)
roryhand 7:fb47ff047ac7 103 {
roryhand 7:fb47ff047ac7 104 place_hold1 = 0;
roryhand 7:fb47ff047ac7 105 place_hold2 = 0;
roryhand 7:fb47ff047ac7 106 flag1 = 1;
roryhand 7:fb47ff047ac7 107 flag2 = 0;
roryhand 7:fb47ff047ac7 108 flag3 = 1;
roryhand 7:fb47ff047ac7 109 }
roryhand 7:fb47ff047ac7 110 if(verbosity == 1)
roryhand 7:fb47ff047ac7 111 {
roryhand 7:fb47ff047ac7 112 printf("value Buffer1: %d\n\r",value[0]);
roryhand 7:fb47ff047ac7 113 }
roryhand 7:fb47ff047ac7 114 }
roryhand 7:fb47ff047ac7 115 else if(flag2 == 0)
roryhand 7:fb47ff047ac7 116 {
roryhand 7:fb47ff047ac7 117 //access double buffer pt2
roryhand 7:fb47ff047ac7 118 value[0] = Buffer1[place_hold2];
roryhand 7:fb47ff047ac7 119 i2s.write(value,1);//Send next PWM value to amp
roryhand 7:fb47ff047ac7 120 place_hold2 = place_hold2 + 1;
roryhand 7:fb47ff047ac7 121 if(place_hold2 == 8)
roryhand 7:fb47ff047ac7 122 {
roryhand 7:fb47ff047ac7 123 place_hold1 = 0;
roryhand 7:fb47ff047ac7 124 place_hold2 = 0;
roryhand 7:fb47ff047ac7 125 flag1 = 0;
roryhand 7:fb47ff047ac7 126 flag2 = 1;
roryhand 7:fb47ff047ac7 127 flag3 = 1;
roryhand 7:fb47ff047ac7 128 }
roryhand 7:fb47ff047ac7 129 if(verbosity == 1)
roryhand 7:fb47ff047ac7 130 {
roryhand 7:fb47ff047ac7 131 printf("value Buffer2: %d\n\r",value[0]);
roryhand 7:fb47ff047ac7 132 }
roryhand 0:004cb0595aa8 133 }
roryhand 7:fb47ff047ac7 134
roryhand 7:fb47ff047ac7 135 }
roryhand 0:004cb0595aa8 136
roryhand 1:ec4e2020522c 137
roryhand 0:004cb0595aa8 138
roryhand 0:004cb0595aa8 139 void wm8731_setup(int chip_addr, int addr, int cmd){
roryhand 0:004cb0595aa8 140 addr = addr << 1;
roryhand 0:004cb0595aa8 141 addr = addr|((cmd >> 8 ))& 0x01;//mess around with order of operations
roryhand 0:004cb0595aa8 142 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 143 i2c.start();
roryhand 0:004cb0595aa8 144 i2c.write( chip_addr );
roryhand 0:004cb0595aa8 145 i2c.write( addr );
roryhand 0:004cb0595aa8 146 i2c.write( cmd );
roryhand 0:004cb0595aa8 147 i2c.stop();
roryhand 0:004cb0595aa8 148 }
roryhand 0:004cb0595aa8 149
roryhand 0:004cb0595aa8 150
roryhand 0:004cb0595aa8 151 void wm8731_config(void){
roryhand 0:004cb0595aa8 152 wm8731_setup( WM8731_ADDRESS, WM8731_REG_RESET, _WM8731_RESET );//1
roryhand 0:004cb0595aa8 153 wm8731_setup( WM8731_ADDRESS, WM8731_REG_LLINE_IN, _WM8731_LEFT_LINEIN );//2
roryhand 0:004cb0595aa8 154 wm8731_setup( WM8731_ADDRESS, WM8731_REG_RLINE_IN, _WM8731_RIGHT_LINEIN );//3
roryhand 0:004cb0595aa8 155 wm8731_setup( WM8731_ADDRESS, WM8731_REG_LHPHONE_OUT, _WM8731_LEFT_HP );//4
roryhand 0:004cb0595aa8 156 wm8731_setup( WM8731_ADDRESS, WM8731_REG_RHPHONE_OUT, _WM8731_RIGHT_HP );//5
roryhand 0:004cb0595aa8 157 wm8731_setup( WM8731_ADDRESS, WM8731_REG_ANALOG_PATH, _WM8731_ANALOGAUDIO );//6
roryhand 0:004cb0595aa8 158 wm8731_setup( WM8731_ADDRESS, WM8731_REG_DIGITAL_PATH, _WM8731_DIGITALAUDIO );//7
roryhand 0:004cb0595aa8 159 wm8731_setup( WM8731_ADDRESS, WM8731_REG_PDOWN_CTRL, _WM8731_POWER );//8
roryhand 0:004cb0595aa8 160 wm8731_setup( WM8731_ADDRESS, WM8731_REG_DIGITAL_IF, _WM8731_DAIF );//9
roryhand 0:004cb0595aa8 161 wm8731_setup( WM8731_ADDRESS, WM8731_REG_SAMPLING_CTRL, _WM8731_SAMPLING );//10
roryhand 0:004cb0595aa8 162 }
roryhand 0:004cb0595aa8 163
roryhand 0:004cb0595aa8 164 void wm8731_configTEST(void){
roryhand 0:004cb0595aa8 165 int addr = WM8731_REG_RESET;
roryhand 0:004cb0595aa8 166 int cmd = _WM8731_RESET;
roryhand 0:004cb0595aa8 167 addr = addr << 1;
roryhand 0:004cb0595aa8 168 addr = addr|((cmd >> 8 ))& 0x01;//mess around with order of operations
roryhand 0:004cb0595aa8 169 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 170 i2c.start();
roryhand 0:004cb0595aa8 171 i2c.write( WM8731_ADDRESS );
roryhand 0:004cb0595aa8 172 i2c.write( addr );
roryhand 0:004cb0595aa8 173 i2c.write( cmd );
roryhand 0:004cb0595aa8 174 i2c.stop();
roryhand 0:004cb0595aa8 175
roryhand 0:004cb0595aa8 176 addr = WM8731_REG_LLINE_IN;
roryhand 0:004cb0595aa8 177 cmd = _WM8731_LEFT_LINEIN;
roryhand 0:004cb0595aa8 178 addr = addr << 1;
roryhand 0:004cb0595aa8 179 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 180 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 181 i2c.start();
roryhand 0:004cb0595aa8 182 i2c.write( WM8731_ADDRESS );//take Fergus' suggestion and declare these to known values EARLIER in program
roryhand 0:004cb0595aa8 183 i2c.write( addr );
roryhand 0:004cb0595aa8 184 i2c.write( cmd );
roryhand 0:004cb0595aa8 185 i2c.stop();
roryhand 0:004cb0595aa8 186
roryhand 0:004cb0595aa8 187
roryhand 0:004cb0595aa8 188 addr = WM8731_REG_RLINE_IN;
roryhand 0:004cb0595aa8 189 cmd = _WM8731_RIGHT_LINEIN;
roryhand 0:004cb0595aa8 190 addr = addr << 1;
roryhand 0:004cb0595aa8 191 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 192 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 193 i2c.start();
roryhand 0:004cb0595aa8 194 i2c.write( WM8731_ADDRESS );//take Fergus' suggestion and declare these to known values EARLIER in program
roryhand 0:004cb0595aa8 195 i2c.write( addr );
roryhand 0:004cb0595aa8 196 i2c.write( cmd );
roryhand 0:004cb0595aa8 197 i2c.stop();
roryhand 0:004cb0595aa8 198
roryhand 0:004cb0595aa8 199
roryhand 0:004cb0595aa8 200 //4
roryhand 0:004cb0595aa8 201 addr = WM8731_REG_LHPHONE_OUT;
roryhand 0:004cb0595aa8 202 cmd = _WM8731_LEFT_HP;
roryhand 0:004cb0595aa8 203 addr = addr << 1;
roryhand 0:004cb0595aa8 204 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 205 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 206 i2c.start();
roryhand 0:004cb0595aa8 207 i2c.write( WM8731_ADDRESS );
roryhand 0:004cb0595aa8 208 i2c.write( addr );//WM8731_REG_LHPHONE_OUT, _WM8731_LEFT_HP
roryhand 0:004cb0595aa8 209 i2c.write(cmd);
roryhand 0:004cb0595aa8 210 i2c.stop();
roryhand 0:004cb0595aa8 211
roryhand 0:004cb0595aa8 212 //5
roryhand 0:004cb0595aa8 213 addr = WM8731_REG_RHPHONE_OUT;
roryhand 0:004cb0595aa8 214 cmd = _WM8731_RIGHT_HP;
roryhand 0:004cb0595aa8 215 addr = addr << 1;
roryhand 0:004cb0595aa8 216 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 217 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 218 i2c.start();
roryhand 0:004cb0595aa8 219 i2c.write( WM8731_ADDRESS );//WM8731_REG_RHPHONE_OUT, _WM8731_RIGHT_HP
roryhand 0:004cb0595aa8 220 i2c.write( addr );
roryhand 0:004cb0595aa8 221 i2c.write( cmd );
roryhand 0:004cb0595aa8 222 i2c.stop();
roryhand 0:004cb0595aa8 223
roryhand 0:004cb0595aa8 224
roryhand 0:004cb0595aa8 225 //6
roryhand 0:004cb0595aa8 226 addr = WM8731_REG_ANALOG_PATH;
roryhand 0:004cb0595aa8 227 cmd = _WM8731_ANALOGAUDIO;
roryhand 0:004cb0595aa8 228 addr = addr << 1;
roryhand 0:004cb0595aa8 229 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 230 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 231 i2c.start();
roryhand 0:004cb0595aa8 232 i2c.write( WM8731_ADDRESS );//WM8731_REG_ANALOG_PATH, _WM8731_ANALOGAUDIO
roryhand 0:004cb0595aa8 233 i2c.write( addr );
roryhand 0:004cb0595aa8 234 i2c.write( cmd );
roryhand 0:004cb0595aa8 235 i2c.stop();
roryhand 0:004cb0595aa8 236
roryhand 0:004cb0595aa8 237 //7
roryhand 0:004cb0595aa8 238 addr = WM8731_REG_DIGITAL_PATH;
roryhand 0:004cb0595aa8 239 cmd = _WM8731_DIGITALAUDIO;
roryhand 0:004cb0595aa8 240 addr = addr << 1;
roryhand 0:004cb0595aa8 241 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 242 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 243 i2c.start();
roryhand 0:004cb0595aa8 244 i2c.write( WM8731_ADDRESS );//WM8731_REG_DIGITAL_PATH, _WM8731_DIGITALAUDIO
roryhand 0:004cb0595aa8 245 i2c.write( addr );
roryhand 0:004cb0595aa8 246 i2c.write( cmd );
roryhand 0:004cb0595aa8 247 i2c.stop();
roryhand 0:004cb0595aa8 248
roryhand 0:004cb0595aa8 249 //8
roryhand 0:004cb0595aa8 250 addr = WM8731_REG_PDOWN_CTRL;
roryhand 0:004cb0595aa8 251 cmd = _WM8731_POWER;
roryhand 0:004cb0595aa8 252 addr = addr << 1;
roryhand 0:004cb0595aa8 253 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 254 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 255 i2c.start();
roryhand 0:004cb0595aa8 256 i2c.write( WM8731_ADDRESS );//WM8731_REG_PDOWN_CTRL, _WM8731_POWER)
roryhand 0:004cb0595aa8 257 i2c.write( addr );
roryhand 0:004cb0595aa8 258 i2c.write( cmd );
roryhand 0:004cb0595aa8 259 i2c.stop();
roryhand 0:004cb0595aa8 260
roryhand 0:004cb0595aa8 261
roryhand 0:004cb0595aa8 262 //9
roryhand 0:004cb0595aa8 263 addr = WM8731_REG_DIGITAL_IF;
roryhand 0:004cb0595aa8 264 cmd = _WM8731_DAIF;
roryhand 0:004cb0595aa8 265 addr = addr << 1;
roryhand 0:004cb0595aa8 266 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 267 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 268 i2c.start();
roryhand 0:004cb0595aa8 269 i2c.write( WM8731_ADDRESS );
roryhand 0:004cb0595aa8 270 i2c.write( addr );//WM8731_REG_DIGITAL_IF, _WM8731_DAIF
roryhand 0:004cb0595aa8 271 i2c.write( cmd );
roryhand 0:004cb0595aa8 272 i2c.stop();
roryhand 0:004cb0595aa8 273
roryhand 0:004cb0595aa8 274
roryhand 0:004cb0595aa8 275 //10
roryhand 0:004cb0595aa8 276 addr = WM8731_REG_SAMPLING_CTRL;
roryhand 0:004cb0595aa8 277 cmd = _WM8731_SAMPLING;
roryhand 0:004cb0595aa8 278 addr = addr << 1;
roryhand 0:004cb0595aa8 279 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 280 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 281 i2c.start();
roryhand 0:004cb0595aa8 282 i2c.write( WM8731_ADDRESS );//WM8731_REG_SAMPLING_CTRL, _WM8731_SAMPLING
roryhand 0:004cb0595aa8 283 i2c.write( addr );
roryhand 0:004cb0595aa8 284 i2c.write( cmd );
roryhand 0:004cb0595aa8 285 i2c.stop();
roryhand 0:004cb0595aa8 286
roryhand 0:004cb0595aa8 287
roryhand 0:004cb0595aa8 288
roryhand 0:004cb0595aa8 289
roryhand 0:004cb0595aa8 290 //11
roryhand 0:004cb0595aa8 291 addr = WM8731_REG_ACTIVE_CTRL;
roryhand 0:004cb0595aa8 292 cmd = _WM8731_ACTIVATE;
roryhand 0:004cb0595aa8 293 addr = addr << 1;
roryhand 0:004cb0595aa8 294 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 295 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 296 i2c.start();
roryhand 0:004cb0595aa8 297 i2c.write( WM8731_ADDRESS );//WM8731_REG_SAMPLING_CTRL, _WM8731_SAMPLING
roryhand 0:004cb0595aa8 298 i2c.write( addr );
roryhand 0:004cb0595aa8 299 i2c.write( cmd );//there is also a deactive version!!
roryhand 0:004cb0595aa8 300 i2c.stop();
roryhand 0:004cb0595aa8 301
roryhand 0:004cb0595aa8 302
roryhand 0:004cb0595aa8 303
roryhand 0:004cb0595aa8 304 }
roryhand 0:004cb0595aa8 305
roryhand 0:004cb0595aa8 306 int main() {
roryhand 0:004cb0595aa8 307 FMT_STRUCT wav_format;
roryhand 0:004cb0595aa8 308 char data[2];
roryhand 0:004cb0595aa8 309 pc.printf("Beginning of program\n");
roryhand 0:004cb0595aa8 310 data[0] = 0x0F;
roryhand 0:004cb0595aa8 311 data[1] = 0x00;
roryhand 0:004cb0595aa8 312 FILE *my_wav;
roryhand 0:004cb0595aa8 313 //my_wav = fopen("/sd/mydir/gp40.wav", "rb");//i think that it is "w" for write, "r" for read.
roryhand 7:fb47ff047ac7 314 my_wav = fopen("/sd/mydir/gp40_48K.wav", "rb");//i think that it is "w" for write, "r" for read.
roryhand 5:5b120a2d9249 315 //my_wav = fopen("/sd/mydir/gp40_48K_quieter.wav", "rb");//i think that it is "w" for write, "r" for read.
roryhand 7:fb47ff047ac7 316 //my_wav = fopen("/sd/mydir/gp40_8K.wav","rb");
roryhand 7:fb47ff047ac7 317 //my_wav = fopen("/sd/mydir/gp40_8K_2018.wav","rb");
roryhand 5:5b120a2d9249 318 //my_wav = fopen("/sd/mydir/emd_645.wav", "rb");
roryhand 0:004cb0595aa8 319 fseek(my_wav, 20, SEEK_SET); // set pointer to byte 20
roryhand 0:004cb0595aa8 320 fread(&AudioFormat, 2, 1, my_wav); // check file is PCM
roryhand 0:004cb0595aa8 321 if (AudioFormat==0x01) {
roryhand 0:004cb0595aa8 322 printf("Wav file is PCM data\n\r");
roryhand 0:004cb0595aa8 323 }
roryhand 0:004cb0595aa8 324 else {
roryhand 0:004cb0595aa8 325 printf("Wav file is not PCM data\n\r");
roryhand 0:004cb0595aa8 326 }
roryhand 0:004cb0595aa8 327
roryhand 0:004cb0595aa8 328 fseek (my_wav,20,SEEK_SET);
roryhand 0:004cb0595aa8 329 fread(&wav_format,sizeof(wav_format),1,my_wav);
roryhand 0:004cb0595aa8 330 printf("%d block align\n",wav_format.block_align);
roryhand 0:004cb0595aa8 331 printf(" %d channels\n",wav_format.num_channels);
roryhand 0:004cb0595aa8 332
roryhand 0:004cb0595aa8 333
roryhand 0:004cb0595aa8 334 fseek(my_wav, 36, SEEK_SET);
roryhand 0:004cb0595aa8 335 fread(&wav_data.subchunk2_ID,4,1,my_wav);
roryhand 0:004cb0595aa8 336 fseek(my_wav, 40, SEEK_SET);
roryhand 0:004cb0595aa8 337 fread(&wav_data.subchunk2_size,4,1,my_wav);
roryhand 0:004cb0595aa8 338 printf("DATA chunck\n");
roryhand 0:004cb0595aa8 339 printf(" %d subchunk 2 ID\n",wav_data.subchunk2_ID);
roryhand 0:004cb0595aa8 340 printf(" %d subchunk 2 size\n",wav_data.subchunk2_size);
roryhand 0:004cb0595aa8 341
roryhand 0:004cb0595aa8 342
roryhand 0:004cb0595aa8 343
roryhand 0:004cb0595aa8 344
roryhand 0:004cb0595aa8 345
roryhand 0:004cb0595aa8 346
roryhand 0:004cb0595aa8 347 i2c.frequency(100000);
roryhand 0:004cb0595aa8 348 long j = 0;
roryhand 0:004cb0595aa8 349
roryhand 0:004cb0595aa8 350 printf("set up the codec\n\r");
roryhand 3:6fba0a044d85 351 while(j <1000){
roryhand 0:004cb0595aa8 352 wm8731_configTEST();
roryhand 3:6fba0a044d85 353 j = j + 1;
roryhand 3:6fba0a044d85 354 }
roryhand 0:004cb0595aa8 355 //i2s audio data transfer code??
roryhand 0:004cb0595aa8 356 i2s.stereomono(I2S_STEREO);
roryhand 0:004cb0595aa8 357 i2s.masterslave(I2S_MASTER);//MASTER definitely works!
roryhand 0:004cb0595aa8 358 i2s.frequency(sample_freq);
roryhand 0:004cb0595aa8 359 int yes = i2s.setup_ok();
roryhand 0:004cb0595aa8 360 pc.printf("Setup went ok?: %d\n", yes);//0 = ack, 1 = Nack*/
roryhand 0:004cb0595aa8 361 printf("can we get to this point? 1\n\r");
roryhand 0:004cb0595aa8 362 led3 = 1;
roryhand 0:004cb0595aa8 363 //myled = 1;
roryhand 0:004cb0595aa8 364 led2 = 1;
roryhand 0:004cb0595aa8 365 printf("can we get to this point? 2\n\r");
roryhand 0:004cb0595aa8 366
roryhand 0:004cb0595aa8 367 myled = 1;
roryhand 0:004cb0595aa8 368 i2s.start();
roryhand 0:004cb0595aa8 369 //while (1) {
roryhand 0:004cb0595aa8 370 fread(&wav_format,sizeof(wav_format),1,my_wav);
roryhand 0:004cb0595aa8 371 printf("wav_format %d\n\r",wav_format);
roryhand 1:ec4e2020522c 372
roryhand 0:004cb0595aa8 373
roryhand 0:004cb0595aa8 374 fseek(my_wav,20,SEEK_SET);
roryhand 0:004cb0595aa8 375 fread(&wav_format,sizeof(wav_format),1,my_wav);
roryhand 0:004cb0595aa8 376 fseek(my_wav,36,SEEK_SET);
roryhand 0:004cb0595aa8 377 fread(&wav_data,sizeof(wav_data),1,my_wav);
roryhand 2:05b426733282 378 int num_slices = wav_data.subchunk2_size/wav_format.block_align;
roryhand 0:004cb0595aa8 379 printf("wav_data.subchunk2_size: %d\n\r",wav_data.subchunk2_size);
roryhand 0:004cb0595aa8 380 printf("wav_format.block_align: %d\n\r",wav_format.block_align);
roryhand 0:004cb0595aa8 381 printf("num_slices: %d\n\r",num_slices);
roryhand 0:004cb0595aa8 382 printf("num_slices*wav_format.block_align %d\n\r",num_slices*wav_format.block_align);
roryhand 0:004cb0595aa8 383 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 384 printf("chunk_size - sizeof(wav_format) %d\n\r",wav_data.subchunk2_size-sizeof(wav_format));
roryhand 0:004cb0595aa8 385 printf("sizeof(wav_format): %d\n\r",sizeof(wav_format));
roryhand 3:6fba0a044d85 386 printf("do we egt to this point:\n\r");
roryhand 6:fd6ae534d120 387 if (interrupt_condition == 1)
roryhand 6:fd6ae534d120 388 {
roryhand 7:fb47ff047ac7 389 sampletick.attach(&isr,1.0/16000); //1/16000
roryhand 7:fb47ff047ac7 390 }
roryhand 3:6fba0a044d85 391 slice_buf=(char *)malloc(wav_format.block_align);
roryhand 7:fb47ff047ac7 392 while(1){
roryhand 7:fb47ff047ac7 393 slice = 0;
roryhand 7:fb47ff047ac7 394 while(flag3 == 1)
roryhand 7:fb47ff047ac7 395 {
roryhand 7:fb47ff047ac7 396 //for (slice=0;slice<num_slices;slice+=1)
roryhand 7:fb47ff047ac7 397 while(slice<num_slices){
roryhand 7:fb47ff047ac7 398 //t2.start();
roryhand 3:6fba0a044d85 399 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 400 //I do not understand why he is not "seeking" through the file first though...
roryhand 3:6fba0a044d85 401 if (feof(my_wav)){
roryhand 2:05b426733282 402 printf("Oops -- not enough slices in the wave file\n");
roryhand 2:05b426733282 403 exit(1);
roryhand 2:05b426733282 404 }
roryhand 5:5b120a2d9249 405 data_sptr=(short *)slice_buf; // 16 bit samples
roryhand 2:05b426733282 406 data_bptr=(unsigned char *)slice_buf; // 8 bit samples
roryhand 2:05b426733282 407 data_wptr=(int *)slice_buf; // 32 bit samples
roryhand 5:5b120a2d9249 408 slice_value[1]=0;
roryhand 2:05b426733282 409 for (channel=0;channel<wav_format.num_channels;channel++) {
roryhand 2:05b426733282 410 switch (wav_format.sig_bps) {
roryhand 2:05b426733282 411 case 16:
roryhand 7:fb47ff047ac7 412 //int mybuffer[1];
roryhand 7:fb47ff047ac7 413 //mybuffer[0] = data_sptr[channel];// - 32768;
roryhand 7:fb47ff047ac7 414 if(flag1 == 1)
roryhand 7:fb47ff047ac7 415 {
roryhand 7:fb47ff047ac7 416 Buffer1[place_hold1] = data_sptr[channel];
roryhand 7:fb47ff047ac7 417 place_hold1 = place_hold1 + 1;
roryhand 7:fb47ff047ac7 418 if(place_hold1 == 8)
roryhand 7:fb47ff047ac7 419 {
roryhand 7:fb47ff047ac7 420 flag4 = 1;
roryhand 7:fb47ff047ac7 421 break;
roryhand 7:fb47ff047ac7 422 }
roryhand 7:fb47ff047ac7 423
roryhand 7:fb47ff047ac7 424 }
roryhand 7:fb47ff047ac7 425 else if(flag2 == 0)
roryhand 7:fb47ff047ac7 426 {
roryhand 7:fb47ff047ac7 427 Buffer2[place_hold2] = data_sptr[channel];
roryhand 7:fb47ff047ac7 428 place_hold2 = place_hold2 + 1;
roryhand 7:fb47ff047ac7 429 if(place_hold2 == 8)
roryhand 7:fb47ff047ac7 430 {
roryhand 7:fb47ff047ac7 431 flag4 = 1;
roryhand 7:fb47ff047ac7 432 break;
roryhand 7:fb47ff047ac7 433 }
roryhand 7:fb47ff047ac7 434
roryhand 7:fb47ff047ac7 435 }
roryhand 7:fb47ff047ac7 436
roryhand 6:fd6ae534d120 437 if(interrupt_condition==1)
roryhand 6:fd6ae534d120 438 {
roryhand 6:fd6ae534d120 439
roryhand 6:fd6ae534d120 440
roryhand 6:fd6ae534d120 441 }
roryhand 6:fd6ae534d120 442 else
roryhand 6:fd6ae534d120 443 {
roryhand 6:fd6ae534d120 444 if(verbosity == 1)
roryhand 6:fd6ae534d120 445 {
roryhand 6:fd6ae534d120 446 t.start();
roryhand 6:fd6ae534d120 447 i2s.write(data_sptr,2);
roryhand 6:fd6ae534d120 448 t.stop();
roryhand 6:fd6ae534d120 449 printf("The time taken was %f seconds\n", t.read());
roryhand 6:fd6ae534d120 450 t.reset();
roryhand 6:fd6ae534d120 451 }
roryhand 6:fd6ae534d120 452
roryhand 6:fd6ae534d120 453 else
roryhand 6:fd6ae534d120 454 {
roryhand 6:fd6ae534d120 455
roryhand 6:fd6ae534d120 456 i2s.write(data_sptr,2);
roryhand 6:fd6ae534d120 457
roryhand 6:fd6ae534d120 458 }
roryhand 6:fd6ae534d120 459
roryhand 6:fd6ae534d120 460 if(sampling_freq == 48000)
roryhand 6:fd6ae534d120 461 {
roryhand 6:fd6ae534d120 462 wait_us(0.1);
roryhand 6:fd6ae534d120 463 }
roryhand 6:fd6ae534d120 464 else if(sampling_freq == 8000)
roryhand 6:fd6ae534d120 465 {
roryhand 6:fd6ae534d120 466 wait_us(2);
roryhand 6:fd6ae534d120 467 }
roryhand 6:fd6ae534d120 468 }
roryhand 6:fd6ae534d120 469
roryhand 6:fd6ae534d120 470
roryhand 6:fd6ae534d120 471
roryhand 6:fd6ae534d120 472
roryhand 6:fd6ae534d120 473
roryhand 2:05b426733282 474 if (verbosity)
roryhand 5:5b120a2d9249 475 printf("16 bit channel %d data=%d\n\r ",channel,data_sptr[channel]);
roryhand 5:5b120a2d9249 476 slice_value[1]+=data_sptr[channel];
roryhand 2:05b426733282 477 break;
roryhand 2:05b426733282 478 case 32:
roryhand 2:05b426733282 479 if (verbosity)
roryhand 2:05b426733282 480 printf("32 bit channel %d data=%d ",channel,data_wptr[channel]);
roryhand 5:5b120a2d9249 481 slice_value[1]+=data_wptr[channel];
roryhand 2:05b426733282 482 break;
roryhand 2:05b426733282 483 case 8:
roryhand 2:05b426733282 484 if (verbosity)
roryhand 2:05b426733282 485 printf("8 bit channel %d data=%d ",channel,(int)data_bptr[channel]);
roryhand 5:5b120a2d9249 486 slice_value[1]+=data_bptr[channel];
roryhand 2:05b426733282 487 break;
roryhand 2:05b426733282 488 }
roryhand 2:05b426733282 489 }
roryhand 7:fb47ff047ac7 490 if(flag4 == 1)
roryhand 7:fb47ff047ac7 491 {
roryhand 7:fb47ff047ac7 492 flag4 = 0;
roryhand 7:fb47ff047ac7 493 break;
roryhand 7:fb47ff047ac7 494 }
roryhand 5:5b120a2d9249 495 slice_value[1]/=wav_format.num_channels;
roryhand 2:05b426733282 496
roryhand 2:05b426733282 497 // slice_value is now averaged. Next it needs to be scaled to an unsigned 16 bit value
roryhand 2:05b426733282 498 // with DC offset so it can be written to the DAC.
roryhand 2:05b426733282 499 switch (wav_format.sig_bps) {
roryhand 5:5b120a2d9249 500 case 8: slice_value[1]<<=8;
roryhand 2:05b426733282 501 break;
roryhand 5:5b120a2d9249 502 case 16: slice_value[1]+=32768;
roryhand 2:05b426733282 503 break;
roryhand 5:5b120a2d9249 504 case 32: slice_value[1]>>=16;
roryhand 5:5b120a2d9249 505 slice_value[1]+=32768;
roryhand 2:05b426733282 506 break;
roryhand 2:05b426733282 507 }
roryhand 5:5b120a2d9249 508 if (verbosity)
roryhand 5:5b120a2d9249 509 {
roryhand 5:5b120a2d9249 510 printf("data_sptr data: %d \n\r",data_sptr);
roryhand 5:5b120a2d9249 511 printf("slice_value data: %d \n\r",slice_value);
roryhand 5:5b120a2d9249 512 }
roryhand 7:fb47ff047ac7 513 slice = slice + 1;
roryhand 5:5b120a2d9249 514 //i2s.write(data_sptr,2);
roryhand 7:fb47ff047ac7 515 //t2.stop();
roryhand 7:fb47ff047ac7 516 //printf("The time taken was %f seconds\n", t2.read());
roryhand 7:fb47ff047ac7 517 //t2.reset();
roryhand 3:6fba0a044d85 518 }
roryhand 7:fb47ff047ac7 519 printf("we must have filled the buffer");
roryhand 7:fb47ff047ac7 520 }
roryhand 7:fb47ff047ac7 521 }
roryhand 7:fb47ff047ac7 522
roryhand 7:fb47ff047ac7 523
roryhand 3:6fba0a044d85 524 /* dac_data=(short unsigned)slice_value;
roryhand 2:05b426733282 525 if (verbosity)
roryhand 2:05b426733282 526 printf("sample %d wptr %d slice_value %d dac_data %u\n",slice,DAC_wptr,(int)slice_value,dac_data);
roryhand 2:05b426733282 527 DAC_fifo[DAC_wptr]=dac_data;
roryhand 2:05b426733282 528 DAC_wptr=(DAC_wptr+1) & 0xff;
roryhand 2:05b426733282 529 while (DAC_wptr==DAC_rptr) {
roryhand 2:05b426733282 530 }
roryhand 3:6fba0a044d85 531 }*/
roryhand 3:6fba0a044d85 532
roryhand 2:05b426733282 533
roryhand 6:fd6ae534d120 534 if(interrupt_condition == 1)
roryhand 6:fd6ae534d120 535 {
roryhand 6:fd6ae534d120 536
roryhand 6:fd6ae534d120 537 sampletick.detach();
roryhand 6:fd6ae534d120 538 }
roryhand 6:fd6ae534d120 539
roryhand 0:004cb0595aa8 540 i2s.stop();
roryhand 0:004cb0595aa8 541
roryhand 0:004cb0595aa8 542 fclose(my_wav);
roryhand 0:004cb0595aa8 543 printf("File is now closed.");
roryhand 0:004cb0595aa8 544 return 0;
roryhand 0:004cb0595aa8 545 }
roryhand 0:004cb0595aa8 546