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Recent content by Elnaz

  1. E

    absolute value in fixed-point

    Right, but how can I use dynamic memory in case of fixed-point? With floating-type I was using malloc. Is there a way to do the same with fixed-type? Elnaz
  2. E

    absolute value in fixed-point

    Thanks FvM. You're absolutely right. I have another question as well. I don't know why I'm getting a "corruption of the heap" error when I "free" the menory of a fixed-point variable? I was always doing this after I'm done with a floating point variable but with the fixed-point it doesn't work...
  3. E

    absolute value in fixed-point

    Hi all, In order to calculate the absolute value of a number in fixed-point, I'm doing num = num & ~(1<<BP) where num is a 64 bit signed fixed-point value (32 integer bits plus 32 fractional bits) and BP is the wordlength=64. But running the C code in VS 2010 I end up getting the same negative...
  4. E

    Fixed-point division in C

    Hi all, Does anyone know of a division function in C for fixed-point numbers? I am using ac_fixed header but apparently that doesn't work since I'm getting zeros when I do 1/a where "a" is a fixed-type with values between 30-60. Thank you, Elnaz
  5. E

    FIT filter in VHDL code

    Hi all, I need a vhdl code for a 4 coefficient FIR filter but I don't have the "Filter Design HDL Coder" installed on my FDAtool. Is there anyway around this issue? I am looking for a vhdl code based on distributed arithmetic. Thanks Elnaz
  6. E

    Distributed Arithmetic in VHDL

    Thanks, but this FIR is the standard implementation not the one with distributed arithmetic method and lookup table etc.
  7. E

    Distributed Arithmetic in VHDL

    I had seen that doc before; but I don't have access to the codes which that lab is all about.
  8. E

    Distributed Arithmetic in VHDL

    Hi everybody, I need a simple vhdl code for signed distributed arithmetic. I want to calculate the result of an inner product with distributed arithmetic (FIR filter). Can you guide me to some sources please?
  9. E

    mapping an irregular shape to represent monitor screen

    Hi everyone, I have captured movements inside an irregular shape and need to map it on the monitor's screen to control cursor position. The input space is a 2D shape with 4 boundaries and these boundaries are not straight lines but irregular and nonlinear. The 2nd space is simply a 2D screen...
  10. E

    Mfile for SFFS implementation

    Hi Does any one know if there is an mfile based implementation of "sequential floating forward" feature selection algorithm available? ( except the one in "PRTOOLS package" ofcourse) Thanks
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