High speed communication to PC!!

Mar 01, 2004 3 Replies
P

Hi all,



I am working for one of the application,where the input data rate to the unit is 1.6Mbps.It is required to read this data and display it in the normal pc. I am confused how shall I cope up with this high data rate . I thought of using parallel port but I don't think that practically it would give this much data rate.I don't have USB and PCI options. Actually Unit has to sample the data@1.6Mbps in a FPGA(The datain is output of an ADC@100khz) decode it and feed it to the pc and display it. I need to have some high spped means for communication between pc and my FPGA device. Once again I don't have PCI or USB option.



Can anybody please suggest me something



Thanks and best regards



praveen deshpande


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M

Well I hate to burst your bubble but apart from magic your options are very limited. Firewire is one way and this would be on the motherboard or a pci card. You do not specify much but can you not buffer it.

It also sound as if a datalogger could also do it for you but maybe you need to spec it a bit better.

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J

Why not impliment an averaging component in the embedded system to essentually slow down the rate rate i.e. 1 point to the computer = an average of x number of ADC samples.

Another problem to your system will be graphing that much data... at some point you are going to have to reduce your data points.

Jamie

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4

1.6Mbps = 200,000 bytes per second. The parallel port can do this (done that with RTlinux for my diploma). Ok, had only 375Kpbs, but it was a 486DX100 and I used only 4 controll-lines as input).

Put a little fifo in between, so that you do not get an interrupt for every byte (Atmel/IDT have some nice, 7201 or 7208 I used)

Or: Use the ATA/IDE interface :-)

42Bastian Do not email to bastian42@yahoo.com, it's a spam-only account :-) Use @epost.de instead !
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