Hello I am new of that forum, and also new user and VHDL programmer, but all my programs working but not optimized I have one counter 7 digit, I use that for read-out linear, whith zero point, when I push button, and the zero point arrive, I whant to frozen the display whith the number in zero point position, but inside the chip, the counters have to work normaly, when I push for second time the button, the number chenge whith real condition of counter. I using EPM240 Altera, and now working perfect, but I have one kilometer of warning, the help said CAUSE: The Quartus II software has found latches implemented using non-optimal resources (LUTs with combinational feedback). Timing Analysis will replace the combinational loop with an equivalent latch. Timing Analysis will now see this logic as a synchronous endpoint, and will not analyze the path through the node. ACTION: Altera recommends that you do not implement latches using combinational logic. Implement them instead with registers using asynchronous load and data signals, or remove them from your design. How I can do, or hiw I have to modify my software?? Thanks in advance Maurizio
> modify my software?? First: VHDL code is NO software. Its a hardware description language. > How I can do, or hiw I have to modify my software?? Just attach your code. Otherwise it makes no sense to give any hints... Try this page with babelfish or google translator (from German): http://www.lothar-miller.de/s9y/categories/36-Kombinatorische-Schleife
First: VHDL code is NO software. Its a hardware description language. Yes for you is not sofware, I know that, is hardware descrption, but it's like a software, where you write instructions like all others software, and that instructions convert yours descriptions in hardware, for that, if you have no licence, and you use the quartusII web edition, the Altera suggest "By licence software", can please to suggest to Altera, change in "By licence for hardware description language". About the file attachment, I think do not need, to see the list, just whith your answer, means, you are not able to give any hints Thanks regards Maurizio
> "By licence software", can please to suggest to Altera, change in > "By licence for hardware description language". No, there you can buy the software for translating your hardware description (maybe in Verilog or VHDL) to a bit stream. This software you can buy from Altera is also known as "toolchain". You can/do not buy a license for any hardware description language, because VHDL is a IEEE standard. > About the file attachment, I think do not need, to see the list, just > whith your answer, You're very self confident... :-/ Good luck for your further life. > means, you are not able to give any hints Nice to hear your personal opinion. But for one you can be sure: I would be able to. I already made most of your mistakes and doubtless much more. And after that I figured out why. > Thanks You are welcome.