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38 Threads found on Hex Verilog
I have ABSOLUTELY no background in verilog (or digital designs for that matter). Just for ease of simulations of larger analog systems, I thought it would be better to provide hex inputs instead of long chains of binary values. So I decided to write veriloga code that spectre can understand. I know veriloga is superset of (...)
Hi, I am trying to use $readmemh in verilog,but i am getting no error. But, it displays xxxxxxxx value for input and output where I want hex numbers. My code is as: module testbench; reg a,b; reg f; wire y; wire zero; parameter vecs = 22; alu alu0 (.a(a),.b(b),.f(f),.y(y),.zero(zero));
Unlike verilog $readmemb(), there's no standard method to import ROM data to design tools. Some tools understand VHDL files for inferred ROM, some can import hex files for vendor ROM macros. Generating a *.VHD file with a constant array is probably the most portable method.
Internal number representation isn't hex or decimal, just binary. You should figure out what you mean with "concatenate". I guess you mean the operation c = a + 100*b
There are two problems involved with your question: - suitable methods to enter ROM data to HDL designs - how to enforce inference of FPGA internal memory for the ROM (provided the FPGA has built-in sufficient memory capacity, which should be checked as a first step. For the first point, verilog has the option to read binary and hex files with
Use readmemh/readmemb system functions to read from the .raw file. To confirm what is read is correct or simply see the hex contents of the raw file, use a hex editor where you can simply open the raw file and see the hex numbers.
I dont understand what you mean? Are you looking at the waveform? or do you have some text file output from your testbench? Are you just looking to see the values in hex rather than binary?
This code was implemented on a CPLD but it is not working. Please help! // This code should show the position of the push-button pressed by glowing appropriate leds. module hex(col,row,led); output reg row,led; input col; integer r,c,val; always@(col ) begin //row=1; led=0; r=3; //while (col); while(r>=
I am trying to load an srec file into to a byte-addressable memory in verilog The memory has to be one megabyte and has to have a 32-bit address input - I am running into the following issues -according to the srec format I have to load data into specific addresses. how to map hex addresses to a verilog memory like this one reg [ (...)
71715 i have a 32bit IP address in hex..say 703020F8..i have to extract first 4bits(in binary) ,do some operation with it, then extract next 4bits and so do i do it? i m a beginner so this question might sound silly.. plz help!
The code is obviously intended as simulation model. I'm not aware of a design compiler supporting textio file commands for memeory initialization, they are using proprietary data formats, e.g. hex files with memory IP. verilog initialization files are e.g. supported by Altera Quartus. Apart from the textio problem, the code is describing an asyn
I was under the impression that Quartus would support verilog $readmemh for synthesis, but I didn't try. Altera IP is however using altsyncram instances and it's init_file feature to implement initialized RAM/ROM. It's also working in Modelsim, if you are using *.hex rather than Altera specific *.mif files. There may be also an issue with different
Hello, What is the best way to read a textfile that contains decimal number (eg. 2.987) into verilog? At the moment, I convert the values to hex using matlab (using num2hex). But when I use readmemh, it assumes that the 32bit variable is a 'regular' number and not a floating number? Any suggestion will be greatly appreciated. Thanks!
Probably you want to add two numbers (BCD addition) and display them on 7seg displays. Here is the code I modified to do that.. Hope this helps! module Lab2ex2part5(A1,A0,B1,B0,S2,S1,S0,SW,hex0,hex1,hex2,hex4,hex5,hex6,hex7); input SW; input A1,A0,B1,B0; (...)
Hi....please help me complete my project..i need to write an array of hex values to sram in altera DE1 board and then read the values. please help...this is d only module that is yet incomplete... I DONT WANT TO USE NIOS II PROCESSOR thanx in advance
HI How to model a memory as 2d Memory array in verilog ?...We have to load an hex file as the programFile for a Microcontroller in the Program ROM......
When dealing with negative numbers in verilog (either decimal or hex) you must indicate explicitly that you are using signed numbers. To do that you just have to declare your variables as signed: "reg signed var" Do the same for input or output signals: "input signed var"
$readmemh is not a very good function. Try using $fread instead. Works better, can read decimal or hex numbers and has a syntax similar to C programming.
testbench I want to write a single byte(8 or 16 bits) into an hex file, but the system always replenishes it to a 32bits data with extra zeros. Part of the verilog file and my analysis are expressed below. // verilog file // Open File fp = $fopen("AF.hex", "wb");//must be binary read mode (...)
how many bits of decimal number u are getting? and from which kind of interface...? If you are getting decimal from software its better to convert it in software and take it on FPGA in hex form only....
To read array from test bench use: initial $readmemh("data.txt",mem); In above case you read hex data from data.txt file to read memory data. You can use for loop to traverse through all the location. To write data to text file use: $dumpfile("data.txt"); Hope this helps
I need help displaying the duty cycle of an incoming 1 MHz signal. The output number will be displayed as a hex value/ascii number. Please help!! For back information, I'm using a Spartan 601 starter kit board. With the use of the provided base reference design interface there is a second tab that has a user defined section. The user is allo
Hi all, I've bunch of 14-bit data points which I would like to convert in hex to use with $readmemh in verilog. Any clue how to do that? It seems there is no direct function to do that in MATLAB and Excel can not handle more than 10-bit data!! Thanks
x <= '0' Bit x <= O"57" Octal x <= X"2F" hexadecimal x <= "00000" Binary x <= B"00000" Binary x <= 1200 Decimal Note that, for instance with hexadecimal, the destination must be a vector which fits exactly (4/8/12/16/20/.... bit vectors).
I think you mean a BCD-to-7-segment decoder. Here is the 'case' statement from a digital clock project that I wrote some time ago. Maybe it will help you. 'nibble' is the 4-bit input code (similar to your BCD value), and 'segment' is an 8-bit register connected to the 7-segment display (and its unused decimal point). It displays hex digits 0
Previously I had trouble with the variations of "readmem". A testbench from last year contained the following comment. // Old commands for using ASCII hex input files // Pull the VLIW into the temporary memory array // $readmemh("sample.hex", tmpMem, 0); That testbench needed binary input data. I solved the problems and got it to work as
verilog 2001. for example, if you have a 4 bit value, lt's say, x=1111 (in binary) if you use $signed(x), it will be -1 if you use $unsigned(x), it will be f in hex (15 in decimal)
For simulation, by using verilog how can I code the programme to obtain pixel data from file hex form. Plesea show me the books, syntax, etc... Thank you very much!
Is this a student project for learning digital design? Are you inputting and outputting decimal integers, fractions, hex, or what? How many digits input and output? What type of hardware chips are you allowed to use? Wiring up TTL/CMOS chips could be torture. How about implementing your logic in an FPGA, using verilog or VHDL?
hey um zahra final yr student of NED uet ay khi pakistan is thr nebody who use modelsim as simulation of verilog codes? and can any one guide me how can i call a data or more precisely image data in modelsim i have converted ma image in hex form via a hexeditor but problem is that i cant initialize ma ram with my data i was familiar with (...)
hi everyone........ if any of you nice guys can help me out . i need some model code written in verilog for 1) hex keypad 2) 14 digit lcd plspls pls pls help me out guys my id is
Hi Ineed aprogram that covert hex file generated from kiel to a form that include full content of program memory ,so that it's easy to implement in my 8051 ROM module. Thanks in advance
I can't think of any technical advantage. When writing code, hexadecimal notation is simply more compact and usually easier to read than binary notation.
Interview question I guess :) ......... It is rather simple here the '-' sign does not denote any value .Remember that in verilog the valid values are only 1,0,X,Z . So when you assign "-" . this is treated as a string and then the ascii value of this "-" is taken which is 2D is hex. The '0' bit value of "-" is ascii is then assigned to the varia
When use @ltera LPM_ROM and @ltera ROM INITIAL FILE to generate LPM_ROM verilog Ccde(With inital value file .hex) then call synplify to produce .edf file to let altera compile to produce .sof file it show Error: Can't compile EDIF Input File due to syntax error parse error, expecting `'('' trace the error find edf syntax as follow c
Hi 1. Any assembler or hex code generator for AMD? 2. Any sample design of for example 8-bit cpus, 16-bits cpus, etc with AMD? tnx
We have to use $readmemb() to read files in binary form. $readmemh() to read hex files. I used it many-a-time, let you check out once. I hope no need of PLI or whatever mentioned....,..., regards, reddy
Hello, I have one problem. I am trying to simulate and synthetise the PIC16F84 into Spartan2 FPGA. The implementation of the PIC (I got it from Opencores) use BlockRAM as a program memory. I would like to know, how I can convert the PIC program (written in MPLAB) from hex format into verilog source which I can use for BlockRAM initialisatio