Simple calculator with FPGA
Guest
#3762254
Dear Experts, I'm a student and have a FPGA project that should be implement a simple calculator with FPGA. I'm beginner and I don'n know that how to implement it. I search in google but not found any thing about cal project. please help me that how can I implement it. The Sinclair Scientific runs on typical calculator hardware which is a bit simpler than more general purpose microcontrollers. I's recently been reverse engineered. http://webcache.googleusercontent.com/search?q=cache:vSwSiigXvvsJ:www.righto.com/sinclair+&cd=2&hl=de&ct=clnk&gl=de Essentially that's implementing a 4 bit Microcomputer and programming it as a calculator. If you want points for originality, you could implement an electronic version of a mechanical calculator. That involves having one or more "registers" which are essentially counters. One architecture would be one main register, which is also displayed at all times, as well as one that holds your input value. Make it so you can add the input number to your display register, but sending a series of impulses to it. For example if you want to add 1337, you send 7 impulses to the 10^0 digit of your display counter, 3 impulses to the 10^1 digit of your display counter, 3 impulses to the 10^2 digit of your display counter and 1 impulse to the 10^3 digit of your display counter. If you add a possibility to shift those lines, you can also easily make it able to multiply things. That way you can add the 10^0 digit of the input register to the 10^5 digit of the display counter, giving you a multiplication of 10^5. So multiplying 1234 times 5678 is fairly simple: You enter 5678 into your input register and make sure your display register is zero. Add your input register to your display register 4 times with no shift. Add your input register to your display register 3 times shifted 1 digit. Add your input register to your display register 2 times shifted 2 digits. Add your input register to your display register 1 times shifted 3 digits. What you get is: 0000 + 5678 + 5678 + 5678 + 5678 + 56780 + 56780 + 56780 + 567800 + 567800 + 5678000 =========== whatever It's like on a Curta. https://www.youtube.com/watch?v=ZDn_DDsBWws Hosein Poorhoseini wrote: > that should be implement a simple calculator with FPGA What experience do you have with FPGA? Did you do the flashing led? Did you do simple IO? Did you control a 7-segment display? What input device do you have? Where do you display the numbers? > I search in google but not found any thing about cal project. I think the purpose of YOUR project and the intention of your teacher is that you learn how to use FPGA, not that you learn how to find some code somewhere and copy some code and present it as yours. Am I right?
Guest
#3764910
Seems one of those useless projects, were things are implemented in an FPGA which should be better done in software. Students should learn to solve hardware issues with FPGAs in the first place, because we have enough "FPGA experts" thinking in software clouds only, because they were beginning with software thinking. Otherways poor Lothar et. all. will be overwhelmed by beginner's questions one time.
Guest
#3766785
Thanks for your reply. I have a teacher that no helped me and we haven't lab in our university. I searching and reading some documents but can't simulate it in Quartos software. I know some VHDL code. but I don't know about select chip model or create board for simulate. Hosein Poorhoseini wrote: > but can't simulate it in Quartos software. So start fixing this. Get the simulator running an just implement a simple counter and simulate it. Don't even try to start with "the big thing" e.g. your desired calculator. > but I don't know about select chip model or create board for simulate. You can select the hardware yourself? Or ist there a hardware platform at school (e.g. a devboard)? If so: which one? ReplyPlease log in before posting. |