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@10:5048aebc394e, 2018-12-02 (annotated)

Committer:
roryhand
Date:
Sun Dec 02 17:33:43 2018 +0000
Revision:
10:5048aebc394e
Parent:
8:40f37287589a 
Version does not work yet.  This has been published so as I can import on mbed command line interface (CLI).

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 8:40f37287589a 11 #define sample_freq 8000
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 8:40f37287589a 55 int verbosity2 = 0;
roryhand 7:fb47ff047ac7 56 int interrupt_condition = 1;
roryhand 8:40f37287589a 57 int sampling_freq = 8000;
roryhand 7:fb47ff047ac7 58 short Buffer1[8];
roryhand 7:fb47ff047ac7 59 short Buffer2[8];
roryhand 7:fb47ff047ac7 60 short place_hold1 = 0;
roryhand 7:fb47ff047ac7 61 short place_hold2 = 0;
roryhand 7:fb47ff047ac7 62 int flag1 = 1;
roryhand 7:fb47ff047ac7 63 int flag2 = 0;
roryhand 7:fb47ff047ac7 64 int flag3 = 1;
roryhand 7:fb47ff047ac7 65 int flag4 = 0;
roryhand 7:fb47ff047ac7 66 short value[1];
roryhand 0:004cb0595aa8 67 //long long slice_value;
roryhand 5:5b120a2d9249 68 int slice_value[1];
roryhand 0:004cb0595aa8 69 FILE *my_wav;
roryhand 0:004cb0595aa8 70 FMT_STRUCT wav_format;
roryhand 0:004cb0595aa8 71 DATA_STRUCT wav_data;
roryhand 0:004cb0595aa8 72
roryhand 0:004cb0595aa8 73 Ticker flipper;
roryhand 0:004cb0595aa8 74 //test
roryhand 0:004cb0595aa8 75 void flip() {
roryhand 0:004cb0595aa8 76 led2 = !led2;
roryhand 0:004cb0595aa8 77 }
roryhand 0:004cb0595aa8 78
roryhand 0:004cb0595aa8 79
roryhand 0:004cb0595aa8 80 void isr()
roryhand 0:004cb0595aa8 81 {
roryhand 7:fb47ff047ac7 82 //buffer[0] = (*data_sptr)>>1;
roryhand 7:fb47ff047ac7 83 //myled = 1;
roryhand 7:fb47ff047ac7 84 //int bufflen = sizeof(buffer);
roryhand 5:5b120a2d9249 85 if(verbosity){
roryhand 4:1a9482a07ee2 86 printf("buffer data: %d \n\r",buffer);
roryhand 7:fb47ff047ac7 87 printf("data_sptr data: %d",data_sptr);
roryhand 7:fb47ff047ac7 88 short value = Buffer1[0];
roryhand 7:fb47ff047ac7 89 printf("value: %d",value);
roryhand 5:5b120a2d9249 90 }
roryhand 7:fb47ff047ac7 91 //t.start();
roryhand 6:fd6ae534d120 92
roryhand 7:fb47ff047ac7 93 //t.stop();
roryhand 7:fb47ff047ac7 94 //printf("The time taken was %f seconds\n", t.read());
roryhand 7:fb47ff047ac7 95 //t.reset();
roryhand 7:fb47ff047ac7 96 //myled = 0;
roryhand 10:5048aebc394e 97 led2 = !led2;
roryhand 7:fb47ff047ac7 98 if(flag1 == 0)
roryhand 7:fb47ff047ac7 99 {
roryhand 7:fb47ff047ac7 100 //access double buffer pt1
roryhand 7:fb47ff047ac7 101 value[0] = Buffer1[place_hold1];
roryhand 7:fb47ff047ac7 102 i2s.write(value,1);//Send next PWM value to amp
roryhand 7:fb47ff047ac7 103 place_hold1 = place_hold1 + 1;
roryhand 7:fb47ff047ac7 104 if(place_hold1 == 8)
roryhand 7:fb47ff047ac7 105 {
roryhand 7:fb47ff047ac7 106 place_hold1 = 0;
roryhand 7:fb47ff047ac7 107 place_hold2 = 0;
roryhand 7:fb47ff047ac7 108 flag1 = 1;
roryhand 7:fb47ff047ac7 109 flag2 = 0;
roryhand 7:fb47ff047ac7 110 flag3 = 1;
roryhand 7:fb47ff047ac7 111 }
roryhand 8:40f37287589a 112 if(verbosity2 == 1)
roryhand 7:fb47ff047ac7 113 {
roryhand 7:fb47ff047ac7 114 printf("value Buffer1: %d\n\r",value[0]);
roryhand 7:fb47ff047ac7 115 }
roryhand 7:fb47ff047ac7 116 }
roryhand 7:fb47ff047ac7 117 else if(flag2 == 0)
roryhand 7:fb47ff047ac7 118 {
roryhand 7:fb47ff047ac7 119 //access double buffer pt2
roryhand 7:fb47ff047ac7 120 value[0] = Buffer1[place_hold2];
roryhand 7:fb47ff047ac7 121 i2s.write(value,1);//Send next PWM value to amp
roryhand 7:fb47ff047ac7 122 place_hold2 = place_hold2 + 1;
roryhand 7:fb47ff047ac7 123 if(place_hold2 == 8)
roryhand 7:fb47ff047ac7 124 {
roryhand 7:fb47ff047ac7 125 place_hold1 = 0;
roryhand 7:fb47ff047ac7 126 place_hold2 = 0;
roryhand 7:fb47ff047ac7 127 flag1 = 0;
roryhand 7:fb47ff047ac7 128 flag2 = 1;
roryhand 7:fb47ff047ac7 129 flag3 = 1;
roryhand 7:fb47ff047ac7 130 }
roryhand 8:40f37287589a 131 if(verbosity2 == 1)
roryhand 7:fb47ff047ac7 132 {
roryhand 7:fb47ff047ac7 133 printf("value Buffer2: %d\n\r",value[0]);
roryhand 7:fb47ff047ac7 134 }
roryhand 0:004cb0595aa8 135 }
roryhand 7:fb47ff047ac7 136
roryhand 7:fb47ff047ac7 137 }
roryhand 0:004cb0595aa8 138
roryhand 1:ec4e2020522c 139
roryhand 0:004cb0595aa8 140
roryhand 0:004cb0595aa8 141 void wm8731_setup(int chip_addr, int addr, int cmd){
roryhand 0:004cb0595aa8 142 addr = addr << 1;
roryhand 0:004cb0595aa8 143 addr = addr|((cmd >> 8 ))& 0x01;//mess around with order of operations
roryhand 0:004cb0595aa8 144 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 145 i2c.start();
roryhand 0:004cb0595aa8 146 i2c.write( chip_addr );
roryhand 0:004cb0595aa8 147 i2c.write( addr );
roryhand 0:004cb0595aa8 148 i2c.write( cmd );
roryhand 0:004cb0595aa8 149 i2c.stop();
roryhand 0:004cb0595aa8 150 }
roryhand 0:004cb0595aa8 151
roryhand 0:004cb0595aa8 152
roryhand 0:004cb0595aa8 153 void wm8731_config(void){
roryhand 0:004cb0595aa8 154 wm8731_setup( WM8731_ADDRESS, WM8731_REG_RESET, _WM8731_RESET );//1
roryhand 0:004cb0595aa8 155 wm8731_setup( WM8731_ADDRESS, WM8731_REG_LLINE_IN, _WM8731_LEFT_LINEIN );//2
roryhand 0:004cb0595aa8 156 wm8731_setup( WM8731_ADDRESS, WM8731_REG_RLINE_IN, _WM8731_RIGHT_LINEIN );//3
roryhand 0:004cb0595aa8 157 wm8731_setup( WM8731_ADDRESS, WM8731_REG_LHPHONE_OUT, _WM8731_LEFT_HP );//4
roryhand 0:004cb0595aa8 158 wm8731_setup( WM8731_ADDRESS, WM8731_REG_RHPHONE_OUT, _WM8731_RIGHT_HP );//5
roryhand 0:004cb0595aa8 159 wm8731_setup( WM8731_ADDRESS, WM8731_REG_ANALOG_PATH, _WM8731_ANALOGAUDIO );//6
roryhand 0:004cb0595aa8 160 wm8731_setup( WM8731_ADDRESS, WM8731_REG_DIGITAL_PATH, _WM8731_DIGITALAUDIO );//7
roryhand 0:004cb0595aa8 161 wm8731_setup( WM8731_ADDRESS, WM8731_REG_PDOWN_CTRL, _WM8731_POWER );//8
roryhand 0:004cb0595aa8 162 wm8731_setup( WM8731_ADDRESS, WM8731_REG_DIGITAL_IF, _WM8731_DAIF );//9
roryhand 0:004cb0595aa8 163 wm8731_setup( WM8731_ADDRESS, WM8731_REG_SAMPLING_CTRL, _WM8731_SAMPLING );//10
roryhand 0:004cb0595aa8 164 }
roryhand 0:004cb0595aa8 165
roryhand 0:004cb0595aa8 166 void wm8731_configTEST(void){
roryhand 0:004cb0595aa8 167 int addr = WM8731_REG_RESET;
roryhand 0:004cb0595aa8 168 int cmd = _WM8731_RESET;
roryhand 0:004cb0595aa8 169 addr = addr << 1;
roryhand 0:004cb0595aa8 170 addr = addr|((cmd >> 8 ))& 0x01;//mess around with order of operations
roryhand 0:004cb0595aa8 171 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 172 i2c.start();
roryhand 0:004cb0595aa8 173 i2c.write( WM8731_ADDRESS );
roryhand 0:004cb0595aa8 174 i2c.write( addr );
roryhand 0:004cb0595aa8 175 i2c.write( cmd );
roryhand 0:004cb0595aa8 176 i2c.stop();
roryhand 0:004cb0595aa8 177
roryhand 0:004cb0595aa8 178 addr = WM8731_REG_LLINE_IN;
roryhand 0:004cb0595aa8 179 cmd = _WM8731_LEFT_LINEIN;
roryhand 0:004cb0595aa8 180 addr = addr << 1;
roryhand 0:004cb0595aa8 181 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 182 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 183 i2c.start();
roryhand 0:004cb0595aa8 184 i2c.write( WM8731_ADDRESS );//take Fergus' suggestion and declare these to known values EARLIER in program
roryhand 0:004cb0595aa8 185 i2c.write( addr );
roryhand 0:004cb0595aa8 186 i2c.write( cmd );
roryhand 0:004cb0595aa8 187 i2c.stop();
roryhand 0:004cb0595aa8 188
roryhand 0:004cb0595aa8 189
roryhand 0:004cb0595aa8 190 addr = WM8731_REG_RLINE_IN;
roryhand 0:004cb0595aa8 191 cmd = _WM8731_RIGHT_LINEIN;
roryhand 0:004cb0595aa8 192 addr = addr << 1;
roryhand 0:004cb0595aa8 193 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 194 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 195 i2c.start();
roryhand 0:004cb0595aa8 196 i2c.write( WM8731_ADDRESS );//take Fergus' suggestion and declare these to known values EARLIER in program
roryhand 0:004cb0595aa8 197 i2c.write( addr );
roryhand 0:004cb0595aa8 198 i2c.write( cmd );
roryhand 0:004cb0595aa8 199 i2c.stop();
roryhand 0:004cb0595aa8 200
roryhand 0:004cb0595aa8 201
roryhand 0:004cb0595aa8 202 //4
roryhand 0:004cb0595aa8 203 addr = WM8731_REG_LHPHONE_OUT;
roryhand 0:004cb0595aa8 204 cmd = _WM8731_LEFT_HP;
roryhand 0:004cb0595aa8 205 addr = addr << 1;
roryhand 0:004cb0595aa8 206 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 207 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 208 i2c.start();
roryhand 0:004cb0595aa8 209 i2c.write( WM8731_ADDRESS );
roryhand 0:004cb0595aa8 210 i2c.write( addr );//WM8731_REG_LHPHONE_OUT, _WM8731_LEFT_HP
roryhand 0:004cb0595aa8 211 i2c.write(cmd);
roryhand 0:004cb0595aa8 212 i2c.stop();
roryhand 0:004cb0595aa8 213
roryhand 0:004cb0595aa8 214 //5
roryhand 0:004cb0595aa8 215 addr = WM8731_REG_RHPHONE_OUT;
roryhand 0:004cb0595aa8 216 cmd = _WM8731_RIGHT_HP;
roryhand 0:004cb0595aa8 217 addr = addr << 1;
roryhand 0:004cb0595aa8 218 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 219 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 220 i2c.start();
roryhand 0:004cb0595aa8 221 i2c.write( WM8731_ADDRESS );//WM8731_REG_RHPHONE_OUT, _WM8731_RIGHT_HP
roryhand 0:004cb0595aa8 222 i2c.write( addr );
roryhand 0:004cb0595aa8 223 i2c.write( cmd );
roryhand 0:004cb0595aa8 224 i2c.stop();
roryhand 0:004cb0595aa8 225
roryhand 0:004cb0595aa8 226
roryhand 0:004cb0595aa8 227 //6
roryhand 0:004cb0595aa8 228 addr = WM8731_REG_ANALOG_PATH;
roryhand 0:004cb0595aa8 229 cmd = _WM8731_ANALOGAUDIO;
roryhand 0:004cb0595aa8 230 addr = addr << 1;
roryhand 0:004cb0595aa8 231 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 232 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 233 i2c.start();
roryhand 0:004cb0595aa8 234 i2c.write( WM8731_ADDRESS );//WM8731_REG_ANALOG_PATH, _WM8731_ANALOGAUDIO
roryhand 0:004cb0595aa8 235 i2c.write( addr );
roryhand 0:004cb0595aa8 236 i2c.write( cmd );
roryhand 0:004cb0595aa8 237 i2c.stop();
roryhand 0:004cb0595aa8 238
roryhand 0:004cb0595aa8 239 //7
roryhand 0:004cb0595aa8 240 addr = WM8731_REG_DIGITAL_PATH;
roryhand 0:004cb0595aa8 241 cmd = _WM8731_DIGITALAUDIO;
roryhand 0:004cb0595aa8 242 addr = addr << 1;
roryhand 0:004cb0595aa8 243 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 244 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 245 i2c.start();
roryhand 0:004cb0595aa8 246 i2c.write( WM8731_ADDRESS );//WM8731_REG_DIGITAL_PATH, _WM8731_DIGITALAUDIO
roryhand 0:004cb0595aa8 247 i2c.write( addr );
roryhand 0:004cb0595aa8 248 i2c.write( cmd );
roryhand 0:004cb0595aa8 249 i2c.stop();
roryhand 0:004cb0595aa8 250
roryhand 0:004cb0595aa8 251 //8
roryhand 0:004cb0595aa8 252 addr = WM8731_REG_PDOWN_CTRL;
roryhand 0:004cb0595aa8 253 cmd = _WM8731_POWER;
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_PDOWN_CTRL, _WM8731_POWER)
roryhand 0:004cb0595aa8 259 i2c.write( addr );
roryhand 0:004cb0595aa8 260 i2c.write( cmd );
roryhand 0:004cb0595aa8 261 i2c.stop();
roryhand 0:004cb0595aa8 262
roryhand 0:004cb0595aa8 263
roryhand 0:004cb0595aa8 264 //9
roryhand 0:004cb0595aa8 265 addr = WM8731_REG_DIGITAL_IF;
roryhand 0:004cb0595aa8 266 cmd = _WM8731_DAIF;
roryhand 0:004cb0595aa8 267 addr = addr << 1;
roryhand 0:004cb0595aa8 268 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 269 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 270 i2c.start();
roryhand 0:004cb0595aa8 271 i2c.write( WM8731_ADDRESS );
roryhand 0:004cb0595aa8 272 i2c.write( addr );//WM8731_REG_DIGITAL_IF, _WM8731_DAIF
roryhand 0:004cb0595aa8 273 i2c.write( cmd );
roryhand 0:004cb0595aa8 274 i2c.stop();
roryhand 0:004cb0595aa8 275
roryhand 0:004cb0595aa8 276
roryhand 0:004cb0595aa8 277 //10
roryhand 0:004cb0595aa8 278 addr = WM8731_REG_SAMPLING_CTRL;
roryhand 0:004cb0595aa8 279 cmd = _WM8731_SAMPLING;
roryhand 0:004cb0595aa8 280 addr = addr << 1;
roryhand 0:004cb0595aa8 281 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 282 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 283 i2c.start();
roryhand 0:004cb0595aa8 284 i2c.write( WM8731_ADDRESS );//WM8731_REG_SAMPLING_CTRL, _WM8731_SAMPLING
roryhand 0:004cb0595aa8 285 i2c.write( addr );
roryhand 0:004cb0595aa8 286 i2c.write( cmd );
roryhand 0:004cb0595aa8 287 i2c.stop();
roryhand 0:004cb0595aa8 288
roryhand 0:004cb0595aa8 289
roryhand 0:004cb0595aa8 290
roryhand 0:004cb0595aa8 291
roryhand 0:004cb0595aa8 292 //11
roryhand 0:004cb0595aa8 293 addr = WM8731_REG_ACTIVE_CTRL;
roryhand 0:004cb0595aa8 294 cmd = _WM8731_ACTIVATE;
roryhand 0:004cb0595aa8 295 addr = addr << 1;
roryhand 0:004cb0595aa8 296 addr = addr|((cmd >> 8 )) & 0x01;
roryhand 0:004cb0595aa8 297 cmd = cmd&0xFF;
roryhand 0:004cb0595aa8 298 i2c.start();
roryhand 0:004cb0595aa8 299 i2c.write( WM8731_ADDRESS );//WM8731_REG_SAMPLING_CTRL, _WM8731_SAMPLING
roryhand 0:004cb0595aa8 300 i2c.write( addr );
roryhand 0:004cb0595aa8 301 i2c.write( cmd );//there is also a deactive version!!
roryhand 0:004cb0595aa8 302 i2c.stop();
roryhand 0:004cb0595aa8 303
roryhand 0:004cb0595aa8 304
roryhand 0:004cb0595aa8 305
roryhand 0:004cb0595aa8 306 }
roryhand 0:004cb0595aa8 307
roryhand 0:004cb0595aa8 308 int main() {
roryhand 0:004cb0595aa8 309 FMT_STRUCT wav_format;
roryhand 0:004cb0595aa8 310 char data[2];
roryhand 0:004cb0595aa8 311 pc.printf("Beginning of program\n");
roryhand 0:004cb0595aa8 312 data[0] = 0x0F;
roryhand 0:004cb0595aa8 313 data[1] = 0x00;
roryhand 0:004cb0595aa8 314 FILE *my_wav;
roryhand 0:004cb0595aa8 315 //my_wav = fopen("/sd/mydir/gp40.wav", "rb");//i think that it is "w" for write, "r" for read.
roryhand 8:40f37287589a 316 //my_wav = fopen("/sd/mydir/gp40_48K.wav", "rb");//i think that it is "w" for write, "r" for read.
roryhand 5:5b120a2d9249 317 //my_wav = fopen("/sd/mydir/gp40_48K_quieter.wav", "rb");//i think that it is "w" for write, "r" for read.
roryhand 7:fb47ff047ac7 318 //my_wav = fopen("/sd/mydir/gp40_8K.wav","rb");
roryhand 8:40f37287589a 319 my_wav = fopen("/sd/mydir/gp40_8K_2018.wav","rb");
roryhand 5:5b120a2d9249 320 //my_wav = fopen("/sd/mydir/emd_645.wav", "rb");
roryhand 0:004cb0595aa8 321 fseek(my_wav, 20, SEEK_SET); // set pointer to byte 20
roryhand 0:004cb0595aa8 322 fread(&AudioFormat, 2, 1, my_wav); // check file is PCM
roryhand 0:004cb0595aa8 323 if (AudioFormat==0x01) {
roryhand 0:004cb0595aa8 324 printf("Wav file is PCM data\n\r");
roryhand 0:004cb0595aa8 325 }
roryhand 0:004cb0595aa8 326 else {
roryhand 0:004cb0595aa8 327 printf("Wav file is not PCM data\n\r");
roryhand 0:004cb0595aa8 328 }
roryhand 0:004cb0595aa8 329
roryhand 0:004cb0595aa8 330 fseek (my_wav,20,SEEK_SET);
roryhand 0:004cb0595aa8 331 fread(&wav_format,sizeof(wav_format),1,my_wav);
roryhand 0:004cb0595aa8 332 printf("%d block align\n",wav_format.block_align);
roryhand 0:004cb0595aa8 333 printf(" %d channels\n",wav_format.num_channels);
roryhand 0:004cb0595aa8 334
roryhand 0:004cb0595aa8 335
roryhand 0:004cb0595aa8 336 fseek(my_wav, 36, SEEK_SET);
roryhand 0:004cb0595aa8 337 fread(&wav_data.subchunk2_ID,4,1,my_wav);
roryhand 0:004cb0595aa8 338 fseek(my_wav, 40, SEEK_SET);
roryhand 0:004cb0595aa8 339 fread(&wav_data.subchunk2_size,4,1,my_wav);
roryhand 0:004cb0595aa8 340 printf("DATA chunck\n");
roryhand 0:004cb0595aa8 341 printf(" %d subchunk 2 ID\n",wav_data.subchunk2_ID);
roryhand 0:004cb0595aa8 342 printf(" %d subchunk 2 size\n",wav_data.subchunk2_size);
roryhand 0:004cb0595aa8 343 i2c.frequency(100000);
roryhand 0:004cb0595aa8 344 long j = 0;
roryhand 0:004cb0595aa8 345 printf("set up the codec\n\r");
roryhand 3:6fba0a044d85 346 while(j <1000){
roryhand 0:004cb0595aa8 347 wm8731_configTEST();
roryhand 3:6fba0a044d85 348 j = j + 1;
roryhand 3:6fba0a044d85 349 }
roryhand 0:004cb0595aa8 350 //i2s audio data transfer code??
roryhand 0:004cb0595aa8 351 i2s.stereomono(I2S_STEREO);
roryhand 0:004cb0595aa8 352 i2s.masterslave(I2S_MASTER);//MASTER definitely works!
roryhand 0:004cb0595aa8 353 i2s.frequency(sample_freq);
roryhand 0:004cb0595aa8 354 int yes = i2s.setup_ok();
roryhand 0:004cb0595aa8 355 pc.printf("Setup went ok?: %d\n", yes);//0 = ack, 1 = Nack*/
roryhand 0:004cb0595aa8 356 printf("can we get to this point? 1\n\r");
roryhand 0:004cb0595aa8 357 led3 = 1;
roryhand 0:004cb0595aa8 358 //myled = 1;
roryhand 0:004cb0595aa8 359 led2 = 1;
roryhand 0:004cb0595aa8 360 printf("can we get to this point? 2\n\r");
roryhand 0:004cb0595aa8 361
roryhand 0:004cb0595aa8 362 myled = 1;
roryhand 0:004cb0595aa8 363 i2s.start();
roryhand 0:004cb0595aa8 364 //while (1) {
roryhand 0:004cb0595aa8 365 fread(&wav_format,sizeof(wav_format),1,my_wav);
roryhand 0:004cb0595aa8 366 printf("wav_format %d\n\r",wav_format);
roryhand 8:40f37287589a 367
roryhand 0:004cb0595aa8 368 fseek(my_wav,20,SEEK_SET);
roryhand 0:004cb0595aa8 369 fread(&wav_format,sizeof(wav_format),1,my_wav);
roryhand 0:004cb0595aa8 370 fseek(my_wav,36,SEEK_SET);
roryhand 0:004cb0595aa8 371 fread(&wav_data,sizeof(wav_data),1,my_wav);
roryhand 2:05b426733282 372 int num_slices = wav_data.subchunk2_size/wav_format.block_align;
roryhand 0:004cb0595aa8 373 printf("wav_data.subchunk2_size: %d\n\r",wav_data.subchunk2_size);
roryhand 0:004cb0595aa8 374 printf("wav_format.block_align: %d\n\r",wav_format.block_align);
roryhand 0:004cb0595aa8 375 printf("num_slices: %d\n\r",num_slices);
roryhand 0:004cb0595aa8 376 printf("num_slices*wav_format.block_align %d\n\r",num_slices*wav_format.block_align);
roryhand 0:004cb0595aa8 377 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 378 printf("chunk_size - sizeof(wav_format) %d\n\r",wav_data.subchunk2_size-sizeof(wav_format));
roryhand 0:004cb0595aa8 379 printf("sizeof(wav_format): %d\n\r",sizeof(wav_format));
roryhand 3:6fba0a044d85 380 printf("do we egt to this point:\n\r");
roryhand 6:fd6ae534d120 381 if (interrupt_condition == 1)
roryhand 6:fd6ae534d120 382 {
roryhand 7:fb47ff047ac7 383 sampletick.attach(&isr,1.0/16000); //1/16000
roryhand 7:fb47ff047ac7 384 }
roryhand 3:6fba0a044d85 385 slice_buf=(char *)malloc(wav_format.block_align);
roryhand 8:40f37287589a 386 slice = 0;
roryhand 7:fb47ff047ac7 387 while(1){
roryhand 8:40f37287589a 388
roryhand 7:fb47ff047ac7 389 while(flag3 == 1)
roryhand 7:fb47ff047ac7 390 {
roryhand 7:fb47ff047ac7 391 //for (slice=0;slice<num_slices;slice+=1)
roryhand 7:fb47ff047ac7 392 while(slice<num_slices){
roryhand 7:fb47ff047ac7 393 //t2.start();
roryhand 3:6fba0a044d85 394 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 395 //I do not understand why he is not "seeking" through the file first though...
roryhand 3:6fba0a044d85 396 if (feof(my_wav)){
roryhand 2:05b426733282 397 printf("Oops -- not enough slices in the wave file\n");
roryhand 2:05b426733282 398 exit(1);
roryhand 2:05b426733282 399 }
roryhand 5:5b120a2d9249 400 data_sptr=(short *)slice_buf; // 16 bit samples
roryhand 2:05b426733282 401 data_bptr=(unsigned char *)slice_buf; // 8 bit samples
roryhand 2:05b426733282 402 data_wptr=(int *)slice_buf; // 32 bit samples
roryhand 5:5b120a2d9249 403 slice_value[1]=0;
roryhand 2:05b426733282 404 for (channel=0;channel<wav_format.num_channels;channel++) {
roryhand 2:05b426733282 405 switch (wav_format.sig_bps) {
roryhand 2:05b426733282 406 case 16:
roryhand 7:fb47ff047ac7 407 //int mybuffer[1];
roryhand 7:fb47ff047ac7 408 //mybuffer[0] = data_sptr[channel];// - 32768;
roryhand 7:fb47ff047ac7 409 if(flag1 == 1)
roryhand 7:fb47ff047ac7 410 {
roryhand 7:fb47ff047ac7 411 Buffer1[place_hold1] = data_sptr[channel];
roryhand 7:fb47ff047ac7 412 place_hold1 = place_hold1 + 1;
roryhand 7:fb47ff047ac7 413 if(place_hold1 == 8)
roryhand 7:fb47ff047ac7 414 {
roryhand 7:fb47ff047ac7 415 flag4 = 1;
roryhand 7:fb47ff047ac7 416 break;
roryhand 7:fb47ff047ac7 417 }
roryhand 7:fb47ff047ac7 418
roryhand 7:fb47ff047ac7 419 }
roryhand 7:fb47ff047ac7 420 else if(flag2 == 0)
roryhand 7:fb47ff047ac7 421 {
roryhand 7:fb47ff047ac7 422 Buffer2[place_hold2] = data_sptr[channel];
roryhand 7:fb47ff047ac7 423 place_hold2 = place_hold2 + 1;
roryhand 7:fb47ff047ac7 424 if(place_hold2 == 8)
roryhand 7:fb47ff047ac7 425 {
roryhand 7:fb47ff047ac7 426 flag4 = 1;
roryhand 7:fb47ff047ac7 427 break;
roryhand 7:fb47ff047ac7 428 }
roryhand 7:fb47ff047ac7 429
roryhand 7:fb47ff047ac7 430 }
roryhand 7:fb47ff047ac7 431
roryhand 6:fd6ae534d120 432 if(interrupt_condition==1)
roryhand 6:fd6ae534d120 433 {
roryhand 6:fd6ae534d120 434
roryhand 6:fd6ae534d120 435
roryhand 6:fd6ae534d120 436 }
roryhand 6:fd6ae534d120 437 else
roryhand 6:fd6ae534d120 438 {
roryhand 6:fd6ae534d120 439 if(verbosity == 1)
roryhand 6:fd6ae534d120 440 {
roryhand 6:fd6ae534d120 441 t.start();
roryhand 6:fd6ae534d120 442 i2s.write(data_sptr,2);
roryhand 6:fd6ae534d120 443 t.stop();
roryhand 6:fd6ae534d120 444 printf("The time taken was %f seconds\n", t.read());
roryhand 6:fd6ae534d120 445 t.reset();
roryhand 6:fd6ae534d120 446 }
roryhand 6:fd6ae534d120 447
roryhand 6:fd6ae534d120 448 else
roryhand 6:fd6ae534d120 449 {
roryhand 6:fd6ae534d120 450
roryhand 6:fd6ae534d120 451 i2s.write(data_sptr,2);
roryhand 6:fd6ae534d120 452
roryhand 6:fd6ae534d120 453 }
roryhand 6:fd6ae534d120 454
roryhand 6:fd6ae534d120 455 if(sampling_freq == 48000)
roryhand 6:fd6ae534d120 456 {
roryhand 6:fd6ae534d120 457 wait_us(0.1);
roryhand 6:fd6ae534d120 458 }
roryhand 6:fd6ae534d120 459 else if(sampling_freq == 8000)
roryhand 6:fd6ae534d120 460 {
roryhand 6:fd6ae534d120 461 wait_us(2);
roryhand 6:fd6ae534d120 462 }
roryhand 6:fd6ae534d120 463 }
roryhand 6:fd6ae534d120 464
roryhand 6:fd6ae534d120 465
roryhand 6:fd6ae534d120 466
roryhand 6:fd6ae534d120 467
roryhand 6:fd6ae534d120 468
roryhand 2:05b426733282 469 if (verbosity)
roryhand 5:5b120a2d9249 470 printf("16 bit channel %d data=%d\n\r ",channel,data_sptr[channel]);
roryhand 5:5b120a2d9249 471 slice_value[1]+=data_sptr[channel];
roryhand 2:05b426733282 472 break;
roryhand 2:05b426733282 473 case 32:
roryhand 2:05b426733282 474 if (verbosity)
roryhand 2:05b426733282 475 printf("32 bit channel %d data=%d ",channel,data_wptr[channel]);
roryhand 5:5b120a2d9249 476 slice_value[1]+=data_wptr[channel];
roryhand 2:05b426733282 477 break;
roryhand 2:05b426733282 478 case 8:
roryhand 2:05b426733282 479 if (verbosity)
roryhand 2:05b426733282 480 printf("8 bit channel %d data=%d ",channel,(int)data_bptr[channel]);
roryhand 5:5b120a2d9249 481 slice_value[1]+=data_bptr[channel];
roryhand 2:05b426733282 482 break;
roryhand 2:05b426733282 483 }
roryhand 2:05b426733282 484 }
roryhand 7:fb47ff047ac7 485 if(flag4 == 1)
roryhand 7:fb47ff047ac7 486 {
roryhand 7:fb47ff047ac7 487 flag4 = 0;
roryhand 7:fb47ff047ac7 488 break;
roryhand 7:fb47ff047ac7 489 }
roryhand 5:5b120a2d9249 490 slice_value[1]/=wav_format.num_channels;
roryhand 2:05b426733282 491
roryhand 2:05b426733282 492 // slice_value is now averaged. Next it needs to be scaled to an unsigned 16 bit value
roryhand 2:05b426733282 493 // with DC offset so it can be written to the DAC.
roryhand 2:05b426733282 494 switch (wav_format.sig_bps) {
roryhand 5:5b120a2d9249 495 case 8: slice_value[1]<<=8;
roryhand 2:05b426733282 496 break;
roryhand 5:5b120a2d9249 497 case 16: slice_value[1]+=32768;
roryhand 2:05b426733282 498 break;
roryhand 5:5b120a2d9249 499 case 32: slice_value[1]>>=16;
roryhand 5:5b120a2d9249 500 slice_value[1]+=32768;
roryhand 2:05b426733282 501 break;
roryhand 2:05b426733282 502 }
roryhand 5:5b120a2d9249 503 if (verbosity)
roryhand 5:5b120a2d9249 504 {
roryhand 5:5b120a2d9249 505 printf("data_sptr data: %d \n\r",data_sptr);
roryhand 5:5b120a2d9249 506 printf("slice_value data: %d \n\r",slice_value);
roryhand 5:5b120a2d9249 507 }
roryhand 7:fb47ff047ac7 508 slice = slice + 1;
roryhand 5:5b120a2d9249 509 //i2s.write(data_sptr,2);
roryhand 7:fb47ff047ac7 510 //t2.stop();
roryhand 7:fb47ff047ac7 511 //printf("The time taken was %f seconds\n", t2.read());
roryhand 7:fb47ff047ac7 512 //t2.reset();
roryhand 3:6fba0a044d85 513 }
roryhand 7:fb47ff047ac7 514 printf("we must have filled the buffer");
roryhand 7:fb47ff047ac7 515 }
roryhand 7:fb47ff047ac7 516 }
roryhand 7:fb47ff047ac7 517
roryhand 7:fb47ff047ac7 518
roryhand 3:6fba0a044d85 519 /* dac_data=(short unsigned)slice_value;
roryhand 2:05b426733282 520 if (verbosity)
roryhand 2:05b426733282 521 printf("sample %d wptr %d slice_value %d dac_data %u\n",slice,DAC_wptr,(int)slice_value,dac_data);
roryhand 2:05b426733282 522 DAC_fifo[DAC_wptr]=dac_data;
roryhand 2:05b426733282 523 DAC_wptr=(DAC_wptr+1) & 0xff;
roryhand 2:05b426733282 524 while (DAC_wptr==DAC_rptr) {
roryhand 2:05b426733282 525 }
roryhand 3:6fba0a044d85 526 }*/
roryhand 3:6fba0a044d85 527
roryhand 2:05b426733282 528
roryhand 6:fd6ae534d120 529 if(interrupt_condition == 1)
roryhand 6:fd6ae534d120 530 {
roryhand 6:fd6ae534d120 531
roryhand 6:fd6ae534d120 532 sampletick.detach();
roryhand 6:fd6ae534d120 533 }
roryhand 6:fd6ae534d120 534
roryhand 0:004cb0595aa8 535 i2s.stop();
roryhand 0:004cb0595aa8 536
roryhand 0:004cb0595aa8 537 fclose(my_wav);
roryhand 0:004cb0595aa8 538 printf("File is now closed.");
roryhand 0:004cb0595aa8 539 return 0;
roryhand 0:004cb0595aa8 540 }
roryhand 0:004cb0595aa8 541