Clock input frequency is 12.288MHz. Audio input is connected to Line1, Output only the left channel. The initialization procedure is the following:
Code: Select all
void codec2_reset()
{
/* reset codec */
codec2_set_register(SCI_MODE, SM_RESET);
/* configure codec */
codec2_set_register(SCI_MODE, SM_LAYER12 | SM_SDINEW | SM_LINE1);
/* Clock */
codec2_set_register(SCI_CLOCKF, 0xc000);
/* Deactivate AAC and WMA.
* These codecs won't be supported until
* the patents have expired.
*/
codec2_write_memory(PARAM_config1, CFG1_NOAAC | CFG1_NOWMA);
codec2_write_memory(PARAM_playMode, 5) /* mono + VU-Meter */;
/* baud rate */
codec2_write_memory(PARAM_ENCODING_txUartDiv, 36); /* 1.536 MBaud */
/* Volume */
codec2_set_register(SCI_VOL, 0xfe);
}
Code: Select all
codec2_load_patches();
codec2_write_memory(PARAM_ENCODING_txUartDiv, 36); /* 1.536 MBaud */
codec2_set_register(SCI_AICTRL0, params->samplerate);
codec2_set_register(SCI_AICTRL1, 1024); /* Gain = 1 */
/* codec mode, UART, no RIFF, PCM, left channel */
codec2_set_register(SCI_AICTRL3, 0xa412);
codec2_set_register(SCI_MODE, codec2_get_register(SCI_MODE) |SM_ENCODE | SM_LINE1);
codec2_set_register(SCI_AIADDR, 0x50);
After that, nothing happens. UART_TX stays high. When not setting bit 15 in SCI_AICTRL3, audio is passed through, but still nothing on the UART.
I've connected a logic analyzer to all the signals and captured the data sent to the VS1013.
SCI-data captured during init:
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00000000 02 00 00 04 02 00 48 02 02 03 C0 00 02 07 1E 03 ......H.........
00000010 02 06 C0 00 02 07 1E 09 02 06 00 05 02 07 1E 2A ...............*
00000020 02 06 00 24 02 0B 00 FE ...$....
Code: Select all
00000000 02 0B 00 FE 02 07 80 50 02 06 00 00 02 06 00 00 .......P........
00000010 02 06 00 06 02 06 81 55 02 06 3D 00 02 06 00 24 .......U..=....$
00000020 02 06 00 01 02 06 36 95 02 06 F4 00 02 06 55 40 ......6.......U@
...
00007380 02 06 C0 1C 02 06 00 02 02 06 00 02 02 06 00 00 ................
00007390 02 06 C0 1B 02 0A 00 50 02 07 1E 2A 02 06 00 24 .......P...*...$
000073A0 02 0C BB 80 02 0D 04 00 02 0F A4 12 03 00 00 00 ................
000073B0 02 00 58 02 02 0A 00 50 02 07 1E 0C 03 06 00 00 ..X....P........