Hi everyone, we are planing to update our system prototype. I've been taking a look into TI Products but its difficult to choose the proper OMAP solution, mostly because of the processing requirements. Here are some bullet points with the requirements we need:
- Execution of a calculation algorithm that requires around 600000 root square calculations/second
- In this point is where I don't know which clock frequency would give the performance needed without saturate the DSP/MCU load. According to the MATHLIB of the DSP, a sqrtsp takes 72 cycles in a single operation and 9 cycles in pipelined execution.
- TDM serial audio stream input , minimun 32 inputs.
- Demultiplexion of all TDM Sources and execution of a delay buffer for each of the sources of approx. 1s
32 sources x 48000 samples/s x 24 bits = 36864000 bits /8 = 4500 Kbytes (Here I guess we need to use DRAM) - SPI or uPP (universal parallel port) for FPGA communication
- UART (Universal Asynchronous Receiver/Transmitter) for Bluetooth communication
- EMAC (Ethernet MAC) for wireless communication (TCP/IP protocol)
- Timing and clock sync
- Audio EQ and filtering
- Touch LCD screen for simple controls
The devices I pre-selected are; OMAP-L1x, OMAP3525 and maybe DaVinci. From the peripheral point of view I think most of the OMAP families fulfil the requirements but the mayor question would be the performance. The processing chain is like follows:
Receive TDM streams -> demultiplex them -> delay them with independent values -> filtering -> put them back in TDM format and going to the output
In parallel a mathematical calculations algorithm should run, here is where the 600000 sqrt are requested, the result of this algorithm is the DATA needed for the FPGA functioning.
The system should have real time operation but I think most of the load is going on the DSP shoulders. Is there any Math library for ARM such as MATHLIB for the DSP where I could see the benchmark of sqrt? Which task could the ARM take part of? My doubt is basically whether OMAP-L1x would be enough or should we go for higher speed clock DSP?
Thanks in advance, I really appreciate any hint.
Greetings!
