How do i convert decimal to hexadecimal for floating points
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Tousif Ahmed
il 19 Lug 2017
Commentato: Victor Tamino
il 27 Ago 2021
I have attached the screenshots, in which i have extracted HOG features for a image and found its values in floating point but when i am converting the same decimal values to hexadecimal i am getting the error. please help
8 Commenti
Guillaume
il 24 Lug 2017
@Walter,
As far as I know, all Xilinx FPGAs support single precision (and half-precision) floating-point (but not double). I commonly use single precision for some operations on my national instruments c-rio fpgas (programmed in labview). It does use a ton of gate and requires a lot more clock cycles than fixed-point though.
Stephen23
il 3 Ago 2017
See also almost this identical question:
Risposta accettata
David Goodmanson
il 19 Lug 2017
HI Tousif,
try num2hex.
6 Commenti
Walter Roberson
il 25 Ott 2018
reshape((dec2bin(typecast(single(pi), 'uint8')) - '0').', 1, [])
Note that this would be in little-endian order. You might prefer
reshape((dec2bin(typecast(swapbytes(single(pi)), 'uint8')) - '0').', 1, [])
Più risposte (2)
mansour torabi
il 18 Feb 2021
You can simply write your own floating point to hex converter, like the following:
x = 5329.675; % Floating point number
xI = floor(x); % Integer Part
HI = dec2hex(xI); % Integer Part in Hex
xF = x - xI; % Floating part
HF = ''; % Floating part in Hex (begining)
ii = 0;
while xF > 0
ii = ii + 1;
ff = xF * 16^ii;
II = floor(ff);
HF = [HF, dec2hex(II)];
xF = ff - II;
end
x_hex = [HI,'.',HF] % Concatinate both Integer and Floating Part in HEX format
1 Commento
Victor Tamino
il 27 Ago 2021
Unfortunately, this code works with errors. If we try to convert 0.45619303 answer is: '0.74C911835D980', but correct answer is 0.74C91100835D98. And another example: 0.38574379 -> '0.62C1AE2AF622C0', but correct answer is 0.62C01AE2AF622DC. As we can see, your function loses zeros in the hex fractional part.
Where is the mistake? I can't understand.
Giancarlo Soasti
il 25 Ott 2018
dec2hex is the function you are probably looking for
2 Commenti
Walter Roberson
il 25 Ott 2018
No, dec2hex only works on nonnegative integers. If you look at the images the original poster posted, they need to convert floating point numbers including fractions.
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