Floating Point Transmission

[MicroManiac]

Hello,
does anyone have any idea how i can send variables of type float or double via the usb while preserving the decimal point?
Thank you

Regards
_________________
"Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction."
Albert Einstein

[RLScott]

What are you sending the variables to? If it is not a PIC programmed by the same compiler, then you cannot be sure the internal binary format of the variable is compatible. In general, if you are sending to a totally different program (like a receiving program on a PC) then it is safer to format the variable as string (using sprint or something similar). It uses more characters, but it is more easily understood across diverse platforms.

I just realized that you said "via USB", which makes it unlikely you are sending to another PIC. In that case, I would say it is even more strongly suggested that you use decimal string format.
_________________
Robert Scott
Real-Time Specialties
Embedded Systems Consulting

[MicroManiac]

Well, i am a newbie regarding this matter.
Can you please elaborate more on your idea, or you can send me some pointers in order to start writing the code.
Thank you
_________________
"Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction."
Albert Einstein

[RLScott]

[MicroManiac]

ok
I am not a newbie using Microchip product and developing usb devices, i am a newbie sending floating point via any interface.
I have some intensive calculations that needs to be done on the embedded level.
After these calculations are finished, i need to send the result via the USB to the PC, this is why i need to send floating point units via the USB
The data will be somehow similar to calculating the average of several points.
_________________
"Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction."
Albert Einstein

[PICoHolic]

If the float representation is similar to the CCS's just send the 4 bytes as raw data ..

Note: there are several representations for float

Good luck

[SherpaDoug]

A serial port, whether RS232 or USB, just sends a stream of bytes. These bytes can represent numbers or strings or any number of data formats. A floating point number is just another data format. Have the PIC turn the float into bytes, send the bytes serially, and the processor on the other end will have to turn the bytes into its version of a float.
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The search for better is endless. Instead simply find very good and get the job done.

[RLScott]

You're getting some good advice on http://forum.microchip.com/tm.aspx?m=394373&mpage=1&. Just follow it.