C6748 FIR performance compared to ADSP-21469

marten.gustafsson

Other Parts Discussed in Thread: OMAP-L138, OMAPL138, 66AK2H12

I have a prototype application running on the ADSP-21469-EZBOARD. The application is using 90% of available FIR resources, including the FIR accelerator.

AD doesn´t offer code protection, so I am looking at the C6748 which has secure boot. Is secure boot only available for C6748?

Will the C6748 match the ADSP-21469 regarding FIR performance?

I have tried to verify that the C6748 (or OMAP-L138) can handle three I2S input channels and four i2S output channels at 192 kbit/s using the one McASP port. I believe that it is possible but would like to have this confirmed. Is there a difference between C6748 and OMAP-L138 regarding McASP wires available?

I need a development board with all McASP pins available on an expansion header (or a good 6/8 channel audio codec on board). I have found the Zoom™ OMAP-L138 EVM, but it isn't clear if the McASP pins are available. Any suggestions appreciated.

Mårten

over 11 years ago

0 Sivaraj Kuppuraj over 11 years ago

TI__Mastermind 35645 points

Hi Marten,

Thanks for your post.

To address your queries, Please find my answers below:

Secure boot is available in OMAPL138 C6000 processor as well in keystone -II -based 66AK2H12 SOC device.

Reg. FIR performance of C6748, you have to use optimal way of implementing filters to compute the FIR filter co-efficents and then convert the filter co-efficents in the correct Q point format required in the C64x DSPLIB FIR functions and use those functions to compute the filtered output. But for sure, C6748 will match the ADSP for optimum FIR performance

I don't think there is difference between OMAPL138 and C6748, infact, OMAPL138 device uses the same C6748 DSP core. Both uses one McASP port to support I2S as well TDM protocols, Yes, you are right, it is possible to support I2S input and output channels.

Both in Zoom OMAPL138 EVM as well Experimentor kit, all the McASP lines are available to both baseboard audio as well audio expansion connector based on changing the S7 DIP switch position (ON/OFF)

Please also refer the below E2E threads for FIR performance with C6748:

http://e2e.ti.com/support/dsp/tms320c6000_high_performance_dsps/f/112/p/230642/835970.aspx#835970

http://e2e.ti.com/support/dsp/tms320c6000_high_performance_dsps/f/112/p/64491/236644.aspx#236644

http://e2e.ti.com/support/dsp/tms320c6000_high_performance_dsps/f/112/p/189382/680024.aspx#680024

http://e2e.ti.com/support/dsp/tms320c6000_high_performance_dsps/f/115/t/32301.aspx

Hope it helps!!

Thanks & regards,

Sivaraj K

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0 marten.gustafsson over 11 years ago in reply to Sivaraj Kuppuraj

Prodigy 30 points

Thanks Sivaraj for your reply.

So the secure boot is only available in the OMAP-L138, but not in C6748?

I have downloaded C674X-DSPLIB and looked into the refernce manual. The DSPF_sp_fircirc function seems to do what I want. But I am missing polyphase interpolation filters as well as optimized decimation filters. Am I missing something?

Mårten

0 marten.gustafsson over 11 years ago

Prodigy 30 points

How secure is secure boot? There is no internal memory on a C6748. This means that the decrypted code is kept in external memory.

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C6748 FIR performance compared to ADSP-21469