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Discussion Groups | FPGA-CPU | Re: Re: why FPGA?
This list is for discussion of the design and implementation of field-programmable gate array based processors and integrated systems. It is also for discussion and community support of the XSOC Project (see http://www.fpgacpu.org/xsoc).
Re: Re: why FPGA? - Jeff Brower - Jan 14 12:44:00 2005
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Eric- > > I just ripped the 220 Rs out of a Mini PCI design and found enough > > board space for switches. > > Austin wrote: > > P.S. BTW, are you making a 5V only, or a "universal" card (3.3V and 5V)? > > MiniPCI is 3.3V only. We have a requirement to plug the card on an adapter and use in PCs. -Jeff |
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RE: Re: why FPGA? - Austin Franklin - Jan 14 19:01:00 2005
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Hi Jeff/Eric, > > > I just ripped the 220 Rs out of a Mini PCI design and found enough > > > board space for switches. > > > > Austin wrote: > > > P.S. BTW, are you making a 5V only, or a "universal" card > (3.3V and 5V)? > > > > MiniPCI is 3.3V only. Sorry, you're right. For some reason the "Mini" stated right above slipped my mind when I wrote that. > We have a requirement to plug the card on an adapter and use in PCs. Who makes the adapter? The odds is the adapter only plugs into a 3.3V slot, or the adapter provides the 5V to 3.3V translation (using quickswitches probably ;-). Regards, Austin |
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Re: Re: why FPGA? - Kathy Quinlan - Jan 14 19:48:00 2005
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OK in this thread, I am lost and wondering if I want to use an FPGA to get data into and out of a PCI bus, how do I do it ? What are the recomended ways ? I do not have any projects right now, but I always have a project on the back burner for a universal i/o board (a bit like the old 8255 pio's of the isa era) Regards, Kat. -- --------------------------------------------------------------- K.A.Q. Electronics Website: www.kaqelectronics.dyndns.org IM: Yahoo: PinkyDwaggy MSN: For Everything Electronics Phone: 0419 923 731 --------------------------------------------------------------- -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.6.12 - Release Date: 14/01/2005 |
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RE: Re: why FPGA? - Austin Franklin - Jan 15 9:21:00 2005
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Hi Kat, > OK in this thread, I am lost and wondering if I want to use an FPGA to > get data into and out of a PCI bus, how do I do it ? What are the > recomended ways ? FPGAs work just fine, providing you follow/understand the implementation recommendations. There are some free PCI FPGA cores out there, that may take a little work to do what you want, but that depends on what you want. If your requirements are a target only (as in, your board gets accessed typically by instructions from the CPU), it is very easy. Master (where the PCI card initiates the PCI bus accesses) are somewhat more difficult. 33MHz is easy, 66MHz is somewhat more difficult. I might suggest discussing this more on the comp.arch.fpga news group, or on the PCI SIG email reflector, or in the Open Cores email reflector. You are more than welcome to ask me questions off-list if you want. Regards, Austin |
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