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A simple digital lock with attempted audio guidance
Dependencies: FATFileSystem TextLCD mbed
Fork of Digital_Lock_with_audio by
Diff: main.cpp
- Revision:
- 4:74d697416c75
- Parent:
- 2:9bdba6204bb4
- Child:
- 5:d45608f231d3
--- a/main.cpp Sat May 11 18:37:21 2013 +0000 +++ b/main.cpp Sun May 12 09:04:10 2013 +0000 @@ -100,6 +100,9 @@ short block_align; short sig_bps; } FMT_STRUCT; + + + void play_wave(char *wavname) { unsigned chunk_id,chunk_size,channel; @@ -123,9 +126,12 @@ DAC_on=0; led1=led2=led3=led4=0; +lcd.cls(); +lcd.printf("Playing wave file '%s'\n",wavname); wavfile=fopen(wavname,"rb"); if (!wavfile) { + lcd.cls(); printf("Unable to open wav file '%s'\n",wavname); exit(1); } @@ -133,27 +139,74 @@ fread(&chunk_id,4,1,wavfile); fread(&chunk_size,4,1,wavfile); while (!feof(wavfile)) { + + + lcd.cls(); + lcd.printf("Read chunk ID 0x%x, size 0x%x\n",chunk_id,chunk_size); switch (chunk_id) { case 0x46464952: fread(&data,4,1,wavfile); + lcd.cls(); + lcd.printf("RIFF chunk\n"); + wait(1); + lcd.cls(); + lcd.printf(" chunk size %d (0x%x)\n",chunk_size,chunk_size); + lcd.cls(); + lcd.printf(" RIFF type 0x%x\n",data); break; case 0x20746d66: fread(&wav_format,sizeof(wav_format),1,wavfile); + lcd.cls(); + lcd.printf("FORMAT chunk\n"); + wait(1); + lcd.cls(); + lcd.printf(" chunk size %d (0x%x)\n",chunk_size,chunk_size); + wait(1); + lcd.cls(); + lcd.printf(" compression code %d\n",wav_format.comp_code); + wait(1); + lcd.cls(); + lcd.printf(" %d channels\n",wav_format.num_channels); + wait(1); + lcd.cls(); + lcd.printf(" %d samples/sec\n",wav_format.sample_rate); + wait(1); + lcd.cls(); + lcd.printf(" %d bytes/sec\n",wav_format.avg_Bps); + wait(1); + lcd.cls(); + lcd.printf(" block align %d\n",wav_format.block_align); + wait(1); + lcd.cls(); + lcd.printf(" %d bits per sample\n",wav_format.sig_bps); if (chunk_size > sizeof(wav_format)) fseek(wavfile,chunk_size-sizeof(wav_format),SEEK_CUR); // create a slice buffer large enough to hold multiple slices slice_buf=(char *)malloc(wav_format.block_align*SLICE_BUF_SIZE); if (!slice_buf) { + lcd.cls(); + lcd.printf("Unable to malloc slice buffer"); exit(1); } break; case 0x61746164: slice_buf=(char *)malloc(wav_format.block_align*SLICE_BUF_SIZE); if (!slice_buf) { + lcd.cls(); + lcd.printf("Unable to malloc slice buffer"); exit(1); } num_slices=chunk_size/wav_format.block_align; + lcd.cls(); + lcd.printf("DATA chunk\n"); + lcd.cls(); + lcd.printf(" chunk size %d (0x%x)\n",chunk_size,chunk_size); + lcd.cls(); + lcd.printf(" %d slices\n",num_slices); + lcd.cls(); + lcd.printf(" Ideal sample interval=%d\n",(unsigned)(1000000.0/wav_format.sample_rate)); samp_int=1000000/(wav_format.sample_rate); - + lcd.cls(); + lcd.printf(" programmed interrupt tick interval=%d\n",samp_int); // starting up ticker to write samples out -- no printfs until tick.detach is called tick.attach_us(&dac_out, samp_int); DAC_on=1; @@ -161,6 +214,8 @@ for (slice=0;slice<num_slices;slice+=SLICE_BUF_SIZE) { fread(slice_buf,wav_format.block_align*SLICE_BUF_SIZE,1,wavfile); if (feof(wavfile)) { + lcd.cls(); + lcd.printf("Oops -- not enough slices in the wave file\n"); exit(1); } data_sptr=(short *)slice_buf; @@ -187,19 +242,27 @@ DAC_on=0; led2=0; tick.detach(); + lcd.cls(); + lcd.printf("Ticker detached\n"); led3=1; free(slice_buf); break; case 0x5453494c: + lcd.cls(); + lcd.printf("INFO chunk, size %d\n",chunk_size); fseek(wavfile,chunk_size,SEEK_CUR); break; default: + lcd.cls(); + lcd.printf("unknown chunk type 0x%x, size %d\n",chunk_id,chunk_size); data=fseek(wavfile,chunk_size,SEEK_CUR); break; } fread(&chunk_id,4,1,wavfile); fread(&chunk_size,4,1,wavfile); } + lcd.cls(); + lcd.printf("Done with wave file\n"); fclose(wavfile); led1=0; } @@ -266,7 +329,8 @@ //------------------------------------------------to start enter new password which user wants to set lcd.cls(); lcd.printf("enter your new password\n"); -play_wave("/sd/forest.wav"); + +//play_wave("/sd/forest.wav"); wait(0.5); int k; @@ -290,7 +354,7 @@ AGAIN: lcd.cls(); lcd.printf("1-open door\n2-reset password"); - //play_wave("/sd/forest.wav"); + play_wave("/sd/forest.wav"); interrupt.fall(&fallInterrupt); interrupt.mode(PullUp); @@ -302,7 +366,7 @@ lcd.cls(); //---------------------------------------------------enter the password lcd.printf("enter your password\n"); - //play_wave("/sd/forest.wav"); + play_wave("/sd/forest.wav"); wait(1); while(1) @@ -328,7 +392,7 @@ wait(1); lcd.cls(); lcd.printf("opening door...\n"); - // play_wave("/sd/forest.wav"); + play_wave("/sd/forest.wav"); myled = 1; myled1 = 0; wait(5);