How do i convert decimal to hexadecimal for floating points
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Tousif Ahmed
el 19 de Jul. de 2017
Comentada: Victor Tamino
el 27 de Ag. de 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 comentarios
Guillaume
el 24 de Jul. de 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
el 3 de Ag. de 2017
See also almost this identical question:
Respuesta aceptada
David Goodmanson
el 19 de Jul. de 2017
HI Tousif,
try num2hex.
6 comentarios
Walter Roberson
el 25 de Oct. de 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, [])
Más respuestas (2)
mansour torabi
el 18 de Feb. de 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 comentario
Victor Tamino
el 27 de Ag. de 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
el 25 de Oct. de 2018
dec2hex is the function you are probably looking for
2 comentarios
Walter Roberson
el 25 de Oct. de 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.
Giancarlo Soasti
el 26 de Oct. de 2018
Yep. You are right. I should have paid attention to the images.
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