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> software that would allow you to take a standard PAL JEDEC and convert > Later Lattice came out with GALs and others copied them with devices > your PAL programmer needed to know about the vendor.
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These were interchangeable from a code standpoint, although > that came from multiple sources and used a standard JEDEC file format to > In the very old days there were PALs, one-time fuse-programmable devices
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The tool usually translate it first in a generic (target independent) netlist and converts than to a library dependen netlist but for the user the intermediate result is not accessible.Įspecially the "free" (in terms of no cost) versions that are available from major FPGA vendors allow only the usage of dedicated libraries, while a full blown synthesizer license would usually allow to include self written libraries (and therefore the possibility eg to write out a netlist converted in NAND2, if you design a library containing only nand2 and Flipflop). Synthesis means usually you translate a v(hdl) description into a library dependend structural netlist containing only library primitives of the target library. > - are the synthesised files compatible across different vendors' chips?
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> - what software (preferably but not necessarily free as in speech and open-source) should I use for that? I have 16V8 and 20V8 chips from Lattice, Atmel and one or two more vendors (don't remember exactly now). Now, I'd like to synthesise it and then comes some questions: I wrote VHDL design and testbench and successfully tested it on. Nine inputs to five outputs, purely combinatorial, non-clocked. > I'd like to make use of GAL chips for a relatively simple logic I need to build.
![synplify pro me on vm synplify pro me on vm](https://cdn.vhdlwhiz.com/wp-content/uploads/2021/02/iCEcube2-ModelSim.png)
Seems like a lot more work than you want, though.Īm Mittwoch, 15. Lucky, you can then throw those equations into the Atmel software and These equations are reduced to sum-of-products, so youĬan easily see how many product terms are used. Synthesize your VHDL, "fit" the device and view the resulting equations Their XC9500-series, which have a PAL-like architecture. Xilinx ISE allows you to target a CPLD like I don't remember using CUPL, although I have used similar languages likeĪbel, MachXL, and PALASM. > I'd be grateful for some clues/hints/pointers.
![synplify pro me on vm synplify pro me on vm](https://user-images.githubusercontent.com/13059545/66709141-1cce7f00-ed12-11e9-8fd6-d9f68d0bf96e.png)
Therefore rewriting the design into CUPL is probably the last resort. > I know there is a CUPL software available from Atmel, and it should be able to synthesise designs for GALs but I would prefer to stick to VHDL, which I assume is going to stay with me for some time to come. > Error executing Synplicity VHDL/Verilog HDL Synthesizer with code 2 > Error output EDIF file c:/documents and settings/silverdr/my documents/sources/vhdl/r512/r512vhdl.edi > Copyright (c) 1991-2010 Lattice Semiconductor Corporation, All rights reserved. > Starting: 'C:\ispLEVER_Classic2_0\ispcpld\bin\Synpwrap.exe -e r512vhdl -target ispGAL -pro ' The problem is that when I try to do some synthesis using ispLEVER/PureVHDL/Synplify/ project I get output like: > So far I downloaded and installed the ispLEVER from Lattice, which is still available and supports "obsolete" devices like GALs.
![synplify pro me on vm synplify pro me on vm](https://i.ytimg.com/vi/qzmxDjmngu0/maxresdefault.jpg)
I'd be grateful for some clues/hints/pointers. I know there is a CUPL software available from Atmel, and it should be able to synthesise designs for GALs but I would prefer to stick to VHDL, which I assume is going to stay with me for some time to come. Starting: 'C:\ispLEVER_Classic2_0\ispcpld\bin\Synpwrap.exe -e r512vhdl -target ispGAL -pro 'Ĭopyright (c) 1991-2010 Lattice Semiconductor Corporation, All rights reserved.Įrror output EDIF file c:/documents and settings/silverdr/my documents/sources/vhdl/r512/r512vhdl.ediĮrror executing Synplicity VHDL/Verilog HDL Synthesizer with code 2 So far I downloaded and installed the ispLEVER from Lattice, which is still available and supports "obsolete" devices like GALs. If there is a GAL (16V8 for example) which has eight inputs and eight Output Logic MacroCells, can some of those OLMCs/pins be configured and used as inputs too? Judging by the specs/datasheet "yes" but would like to confirm that. are the synthesised files compatible across different vendors' chips? what software (preferably but not necessarily free as in speech and open-source) should I use for that? I have 16V8 and 20V8 chips from Lattice, Atmel and one or two more vendors (don't remember exactly now). I'd like to make use of GAL chips for a relatively simple logic I need to build. Hello group (and please have understanding for a newbie in the subject).