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i have the values of my expression in discrete points in advance(following the same step), all i have to do is to conclude the derivative of each one
thanks a lot for answering and sorry if my english is not that good
but i found the expression i mentioned in wikipedia
https://fr.wikipedia.org/wiki/D%C3%A9riv%C3%A9e#D.C3.A9rivation_num.C3.A9rique
it's in frensh but you can see the expression in the 8th section 'dérivation numérique',is it possible to be a wrong expression ?
can you recommand any book or tutorials that can help me understand how a design work on hardware ? when it can be synthesizable and when not and why ? i feel like it's hard to write VHDL with my basic electronics knowlege
i'm so grateful,thanks for your answers
regards jojo
thanks a lot,i'm sorry for making such horrible mistakes,i need to synthesis this code,i'm going to do a number of repeated substraction until i reach a certain condition (for example a>b ..) so can you give me a suggestion in whish structure should i use to do that,knowing that i'm dealing with...
hey there ,
so in my code i need to know how many times a while loop was excuted (i don't know the number of iteration in advance and i should know it in a division algorithm )
how to know the value of I outside the process in the following example ?
process (r,b)
variable I :integer :=0...
hey i'm a newbie ,i want to have a simple substraction between two std logic vectors so i converted them into signed,but when i tested this code it didn't work correctly for example 8 +(-5) gave me (-1021) istead of 3 !!!
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all...
hi,
i have the coordinates (easting / northing) on 12bits std_logic_vector, so i'm going to use those to implement f'(x(i))=(Y(i-1)-Y(i+1))/(x(i-1)-x(i+1))
can you help me with some examples or refrences,thanks a lot.
regards
jojo26
I'm trying,this my first time writing a code of a system without its description (inputs,outputs,blocks..).i'll succeed soon..not in 5mins but soon.thanks for your help ;-)
i did some research and i read about numerical differentiation and finite difference approximation,and it is indeed the solution to derive in vhdl.but i found nothing about vhdl algorithms treating this kind of problems. can you help me with an example ?
i'm sorry i have no details about the function i'm going to work on,i was given an assignment,i should find algorithms for derivative in vhdl using multiplication,addition and division only.so if i got you right,it is possible to write this kind of VHDL algorithms ?
thank you
hi,
i know that dealing with derivative in VHDL is not that possible,but i want to ask why ? and if i have a given funcion would it be possible to do a certain approximation in order to have derivative and what are the steps to succed in that.i'm so confused.
thanks a lot.
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