VS1103 datasheet(41/61 Pages) VLSI

41 / 61 page

VS1103b Datasheet

OPERATION

void RecordAdpcm1103(void) { /* VS1003b/VS1023 */

u_int16 w = 0, idx = 0, n = 0;

s_int32 adpcmBlocks = -1;

...

/* Check and locate free space on disk */

WriteMp3SpiReg(SCI_CLOCKF, 0xC3E8); /* 4.0x 12.288MHz */

WaitForDreq();

/* Wait for DREQ to go up again */

WriteMp3SpiReg(SCI_MODE,

0x0804); /* Normal SW reset + other bits */

WaitForDreq();

/* Wait for DREQ to go up again */

WriteMp3SpiReg(SCI_VOL,

0x1414); /* Recording monitor volume */

WriteMp3SpiReg(SCI_BASS,

0); /* Bass/treble disabled */

WriteMp3SpiReg(SCI_MIXERVOL, 0x8000U | (23<<10) | (23<<5) | (23));

WriteMp3SpiReg(SCI_ADPCMRECCTL,25+20); /* Auto gain to max +20 dB */

WriteMp3SpiReg(SCI_MODE,

0x08c8); /* Line in, SDI MIDI, SCI ADPCM, 8 kHz */

for (idx=0; idx < sizeof(header); idx++)

/* Save header first */

db[idx] = header[idx];

db[24] = sampleRate;

/* Set sample rate */

db[25] = samplRate>>8;

/* Synchronize */

do {

n = 8 * ((ReadMp3SpiReg(SCI_IN1) >> 8) & 0xFF);

Yield(1);

/* Give control to other processes for 1 ms */

} while (n >= 480);

/* whole buffer size = 512 words */

/* Record loop */

while (recording_on) {

while (idx < 512) {

do {

n = 8 * ((ReadMp3SpiReg(SCI_IN1) >> 8) & 0xFF);

Yield(1);

/* Give control to other processes for 1 ms */

} while (n < 16); /* Only load data if >= 16 words available */

while (n--) {

w = ReadMp3SpiReg(SCI_IN0);

db[idx++] = w>>8;

db[idx++] = w&0xFF;

}

idx = 0;

write_block(datasector++, db); /* Write one disk block */

adpcmBlocks+=2;

/* Disk block contains 2 adpcm blocks */

}

if (adpcmBlocks >= 0) {

/* The previous algorithm will always write an unfinished ADPCM block.

It doesn't matter as we consistently only tell of the data until

the last completely written block. */

dataSizeD

= adpcmBlocks*256;

chunkSizeF

= dataSizeD+52:

numOfSamplesS = adpcmBlocks*505;

...

/* Fix WAV header information */

}

Version: 1.04, 2018-03-16

VS1103 Datasheet(PDF) 41 Page - VLSI Solution Oy

VS1103 Datasheet(HTML) 41 Page - VLSI Solution Oy

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61

Datasheet Download

Link URL