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I assume you meat 25 Mhz parallel data. If Its 10 bit framed 25MHz bit data then the XUarts could be used by data division with some external circuitry Assuming parallel at 25 MHz then the parallel to USB controllers are of little use. They are actually, as is suspected, embedded micro controllers. Since the clock rate is 12Mhz, the implication is obvious A Pci parallel card is an interesting option, but such a card has a couple of disadvantages: 1) The 7500 does not directly support pci so with the card, you'll pay 5 times as much in production for hardware 2) I'd have to check the actual specs on the proposed card. It could be the inputs on the
card can't keep up 3) The card is likely to have limited on board memory, so you'll have to develop a DMA based driver anyway From: mike ingle <> To: Sent: Friday, July 29, 2011 2:11 PM Subject: Re: [ts-7000] Re: Using TS-7500 SBC to collect and transfer camera data over TCP/IP I think you need to consider what you really need to do with the data. 1. You absolutely require EVERY frame to make it up to the host computer. a. You only require the data, not any real time actions on a frame per frame basis Use Jasons recommendation and get a parallel to USB solution. Its cheap and easy. b. you require real time actions on each frame. I think the USB to the host is still probably simplest, but in parallel, you would want to use an FPGA or DSP. I don't see much value of the TS7500 for this other than as a FPGA carrier. 2. You need to look at some frames, for diagnostic purposes, but really only require the processed results (data reduction) at the host computer. The TS-7500 might work for this, as it can serve up the data over ethernet or usb, and the fpga might be usable fort he processing. 3. I neglected to consider the possibility that the overall frame rate is such that while the pixel clock is 25Mhz, the overall data rate is less than say 2Mbytes per sec. I would consider the TS-7500 acceptable for that scenario, but at MUCH greater development expense than the USB-parallel One more choice would be to use a 1 lane PCI express data collection card, I have a $99
lattice ECP3 based card which manages 180Mbytes/sec. Regards Mike On Jul 29, 2011, at 10:30 AM, walter marvin wrote:
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