Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Recent content by andrew257

  1. A

    TL431 driving a P mosfet help

    Solved. TL431 requires 1mA current to stabalise.
  2. A

    how to make a square colour

    Hi All, looking for a windows XP app. Am after a 1cm x 1cm square that flashes between black and white. No boarders or anything just a plain square. flash rate around 0.5s. If anyone can help or start me off with the code. thanks
  3. A

    Voltage outpur or current output DAC?

    current output dac Hi all, ive recently come across current output DACs and i was wondering what they might be used in. The ones i have seen always seem to have a current to voltage converter which seems rather pointless if you could use a voltage output DAc in first place. Are there any...
  4. A

    Question about sampling an input sine wave to system using A/D

    hi all i am sampling an input sine wave to my system using an A/D, i am then measuring using a scope the output from my D/A. The problem i have is with a 1khz sine wave going in from my function generator the output looks distorted and does not look like the input signal. Now i was aware i...
  5. A

    Check my math on this memory size problem

    hi all can someone double check my math here on this memory size problem. i am storing sampled data into memory. the memory is 8M X16 bits. i am not using all of this memory only from address 0 to 3FFFFF =(4194303) now i am storing my data in memory unitl it is full. Using a stop watch i...
  6. A

    Synthesizable adder in Verilog language

    Re: sythesizable adder Yeah FvM you are correct i am using offset binary, i forgot to mension that in an earlier post. the data is coming on a databus, all 8 bits at a time. stored in a reg and then added together. if i declar the reg as signed will it automaticaly change the MSB for me i.e...
  7. A

    Synthesizable adder in Verilog language

    Re: sythesizable adder hi echo, thanks for the reply, what about adding signed numbers. i know there is a signed statement in verilog that can be used but is it synthesizable? basically i need to add two sets of numbers together. both are 8 bits. however i first need to convert the bits to...
  8. A

    Synthesizable adder in Verilog language

    hi all, is it possible to use the "+" in verilog language and expect the compiler to make the logic for an adder. e.g input a; input b; output c; assign c = a + b; is code like this synthesizable or would i actually have to look at making an adder from logic gates etc. thanks
  9. A

    How to fix multi source errors in Verilog code?

    hi all, i keep getting an error message when i try to compile my verilog code. it refers to a multi source. Now i can see where the error is occuring but i dont know how to fix it. basically i have the outputs of 3 modules all connecting to the same input on another module. e.g output1...
  10. A

    NEXYS2 Spartan 3E LED issue.

    spartan 3e verilog you are correct with your pin assignments. If you use the provided reference manual it shows all the pin outs for all the peripherals the board contains. Are you sure its the board and not your code? Have you simulated your code to see if it runs as you require? As you have...
  11. A

    Questions about submodels of instantiated top model in testbench

    if i make a test bench and instantiate a top module i do not get any change in waveforms. They all stay to what they are initialised to. my top module has three modules instantiated into it. Does that mean my test bench needs all three sub modules for it to work. i was under the impression...
  12. A

    Unexpected token error in a code

    Re: unexpected token actually that was a typo in my haste to post the problem. my code actually has it assigned as a 5 bit reg. reg [4:0] count = 16; always @ (posedge clk) begin if (start) count = (count > 0) ? count-1 : count =16; else count = 16; end now call me stupid but i...
  13. A

    Unexpected token error in a code

    unexpected token what is wrong with following code? i keep getting an unexpected token error message pointing to the condition statement, something to do with '=' ????? reg count = 16; always @ (posedge clk) begin if (start) count = (count > 0) ? count-1 : count =16; else count = 16; end
  14. A

    What does it mean that a chips has 8M x 16 bits memory?

    Re: memory do all memory addresses start from zero or do they start from address one. Only the board i am using has 24 bit address but address zero has no connection acording to the user manual. therefore its a 23 bit address starting from 1 and going to 23.
  15. A

    What does it mean that a chips has 8M x 16 bits memory?

    Re: memory thanks for the fast reply, i was wondering about the 23 addresses becasue one source says [22:0] and another says it is a 24 bit address but the extra bit must be for individual bits. Thanks why do they describe the memory as 8m x 16, and 8m x 2 x 8 is still confussing?
See more

Part and Inventory Search

Back
Top