VS1063 MP3 Encoding

[ravia2]

Hi,

VS1063A acting as a slave processor connected to MCU master processor communicating using SPI protocol.

Input: sine wave 5KHz 1Vpp from function generator connected to LINE1 input.

VS1063 configuration: (Master SPI clock = 1MHz, Chip Select = falling edge, MSB = First)
1. SCI_MODE = SM_SDINEW|SM_SDISHARE|SM_RESET
2. Dummy writes to AICTRL1/AICTRL2 register to make sure the device responds coming out of reset
3. CLOCKF = 0xE000 (5.0x MULT, NO Addition)
4. SCI_VOL = 0x0C0C
5. Load the latest (2.5 version) patches
6. Recording parameters
a. RECRATE = 48KHz
b. RECGAIN = 1024
c. RECMODE = RM_63_FORMAT_MP3 | RM_63_ADC_MODE_JOINT_AGC_STEREO
d. RECQUALITY = RQ_MODE_VBR | RQ_MULT_1000 | 192 ==> (translates to 192Kbps)
7. SCI_MODE = enable SM_LINE1 and SM_ENCODE
8. SCI_AIADDR = 0x0050

My software reads the SCI_HDAT1 to determine the number of valid bytes available to read from SCI_HDAT0

Observation:
I always read ZERO value on SCI_HDAT1 register (no encoded data available to read).

Could you please help me troubleshooting my problem ..

Really appreciate all VLSI staffs for their continued support on these discussion forums.

[pasi]

For 7, you still have SM_SDINEW (and SM_SDISHARE) also set (and SM_RESET clear)?

Does your patch upload work when you play files?
Have you tried to start the encoding mode without the patches? (set SM_ENCODE + SM_RESET instead of writing to AIADDR)

[ravia2]

Pasi,

Thank you for the suggestions...

Yes, step #7 both SM_SDINEW & SM_SDISHARE bits are set and SM_RESET bit is cleared.

Scope of my project is to only encode audio data using VS1063A chip thus I haven't tried playing mp3 data using this chip.

I have tried activating ENCODING without the patch (set SM_ENCODE and SM_RESET bit), still I don't see any non-zero value read from SCI_HDAT1 register.

Are there any internal register that can be read to Analog2Digital outputs (to confirm that audio signal does get into ADC peripheral) ?

[pasi]

Back to basics:
- Do you have AVDD?
- Does RCAP raise to 1.2V?
- CVDD is 1.8V?

However, you should be reading non-zero from HDAT1 regardless of analog input.