400mA at 3.3V or 1.32 Watts !! Are you kidding me !!
And that's with all of the peripherals running as well !!
And there is more !! 60 bucks for an ICE. Ebay number 350473496337. Check it out
Is this a question?
And there is more !! 60 bucks for an ICE. Ebay number 350473496337. Check it out
Again, no. Steph's XMC4500 Relax board with two CPUs on it is under half that price here. As well as much lower power consumption.
the price and power is not an issue at all at 1 watt and you know how it is, there will always be someone who wants a 4-way active crossover
Time to practice with the sole and only member that's curently available, the XMC4500? Time to buy a few XMC4500 Relax Lite Kits from Hitex? XMC4500 Relax Lite Kit
Why would that someone want an XO though that consumes more power, rather than less?
that's like asking what is the price of fish is on mars. The power has no relevance whatsoever unless you are running it from batteries which I don't think is a requirement here. There are plenty here who run dsp crossovers on their PC hardware. What power do you think they consume ? A lot more than a TMS320F28335 !!
The TI dsps are well documented and well supported and have been for decades which is more than I can say for these cortex M4 devices.
I'm not following you. Perhaps explain the steps you used to reach this analogy?
Why not go for the lowest power and lowest price, all other things being equal? Don't just assert, explain why power isn't relevant. In any case even though you don't find it relevant, I most certainly do and it was you pitching the product.
So what? Plenty of people leave windows open with the aircon running.
Relevance? TI will be dead long before ARM gives up the ghost - have you checked the relative corporate performance of the two any time recently? Investing effort in learning TI proprietary hardware isn't a long-term investment at all.
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I found a seller on Taobao for 180rmb so I'll go that route for now. However I have something of a back-log of devboards here....
So we can all assume that there will be another 51 pages filled up with links to cortex M4 eval boards and not one practical implementation of a dsp crossover ??
Maybe better to rename the thread to "Lets just talk about dsp's"
You're free to assume what you want. If you'd go back to the beginning of the thread, you'll see its not intended to result in a particular physical incarnation of a DSP crossover, rather to assist and encourage the design of digital filters on relatively simple hardware - the practical implementation being decided by the individual DIYer. If you're frustrated and in need of actual hardware may I suggest miniDSP?
Maybe the simplest way to implement a DSP crossover is to use the TI PCM5142 DACs (chained, the DAC has also an I2S output, or actually several, so you can also use any other DAC as converter) with built-in miniDSP (which for some reason TI didn't trademark so miniDSP.com can use the name as well even though they are using Analog Devices products):
Audio Converter - Audio DAC - PCM5142 - TI.com
Well, you have to program the coefficients using SPI/I2C interface to DAC, and for multiway xover you need another DAC but the parts count will remain low and the DACs are better quality than the DACs which were built into the now obsole TAS3xxx chips (which Hypex are still using).
Audio Converter - Audio DAC - PCM5142 - TI.com
Well, you have to program the coefficients using SPI/I2C interface to DAC, and for multiway xover you need another DAC but the parts count will remain low and the DACs are better quality than the DACs which were built into the now obsole TAS3xxx chips (which Hypex are still using).
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This discussion should be renamed "non-Linux Open Source DSP XOs" because what's regarding Linux, the choice is now obvious thanks to Richard Taylor implementation on Ubuntu. Please check post #37 in the following discussion: http://www.diyaudio.com/forums/multi-way/183879-pc-crossover-software-4.html#post3683332
They actually publish the design files for their 60 buck XDS100V2, so you can build one yourself if you want - or you can buy a Dangerous Prototypes "Bus Blaster" and reprogram it with the VID/PID and CPLD code of the XDS100, as the hardware's pretty much the same. I'm actually using this setup currently for C55x development.400mA at 3.3V or 1.32 Watts !! Are you kidding me !!
And that's with all of the peripherals running as well !!
And there is more !! 60 bucks for an ICE. Ebay number 350473496337. Check it out
I haven't looked into how open sourceable the C55x series are, but if a free version of CCS is available or an open source compiler can be used, you could build an open DSP card using a C5509 or similar DSP which comes in a LQFP.
Another thing to consider, is an I2S port available on a Beagleboard or Beaglebone?
Did TI ever bother to document the capabilities of a miniDSP device? Last I checked there was nothing published as to precision or number of biquads available. Lots of customers have asked in TI's forums for the instruction set and been turned down. So the platform's not exactly what one might call open. Neither is SigmaDSP. But at least Analog is clear about the MAC and MIPS.
As an aside, I think you've some confusion as to the capabilities of the TAS3108 Hypex uses on the DLCP as well as the DLCP BOM. Might want to take a closer look.
Yeah it's quite difficult to even get the software tools without buying their evaluation kits. I think the miniDSP capabilities are easiest to find by experimenting a desing in PurePath Studio "Home" version GDE which supports the DAC or reading the data sheet of PCM5142 which tells there are room for 512 24-bit coefficients which means over 100 biquads can be used. I'm quite sure that with a single PCM5142 and two PCM5102's you could implement a stereo three-way crossover easily. In addition it is possible to implement some miniDSP code (but the support is generally not so good I agree, at least if you are just a hobbyist). I know there are some DIYers working @TI (like the guy who defined the PCM51xx parts) but guess they can't do anything to bring up the tools like PurePath Studio to hobbyists (it's not downloadable directly, you have to apply for it separately, and at least earlier you had to be representing a company), or to opening up the programming interfaces for the miniDSP parts.
Regarding TAS3108 I just meant it's obsolete, the parts with DACs are TAS3204 and TAS3208 with SNR of 97dB.
The datasheet says (p.41): "The miniDSP can run up to 1024 instructions on every audio sample at a 48kHz sample rate."
Interesting chip btw, and first time I hear of it, thx.
Here you can find a document showing the PurePath Studio GDE so you get kind of feeling how it works:
http://www.ti.com/lit/an/slaa541/slaa541.pdf
With the PCM5142 you are not restricted to the ROM code and processing flow so you can actually edit the flows and add more I2S outputs for external DAC's (they are mapped to GPIO pins on PCM5142).
TI had already published an application note for MSP430 to be used to control the audio products (slaa605) but seems they have taken it off the web. Anyway it's not that complicated if you can first play with the PPS and study the exported data. However, you have to get access to TI extranet (pps.ext.ti.com) first, not sure if they will give it everyone asking though.
http://www.ti.com/lit/an/slaa541/slaa541.pdf
With the PCM5142 you are not restricted to the ROM code and processing flow so you can actually edit the flows and add more I2S outputs for external DAC's (they are mapped to GPIO pins on PCM5142).
TI had already published an application note for MSP430 to be used to control the audio products (slaa605) but seems they have taken it off the web. Anyway it's not that complicated if you can first play with the PPS and study the exported data. However, you have to get access to TI extranet (pps.ext.ti.com) first, not sure if they will give it everyone asking though.
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