On Sun, 2011-08-07 at 20:33 -0400, Derrick Washington wrote:
> Hi
>
> I need to know if the inputs coming from FG, while using a generic
> protocol having binary mode set to true, are coming in as integers
> that need to be converted to floating point or is FG actually sending
> in a floating point word, a byte at a time? So my code to receive FG
> data looks something like this....
>
>
> for ( int i = 0; i <= 3; i++ ) { dummy_var = (dummy_var << 8) |
> rs232_uart1; }
>
>
>
> return ( (float) dummy_var);
>
> What I am wondering is, is the " return ( (float) dummy_var); " cast
> to a float necessary, or is the number already in floating point
> format, if so then I need to instruct my hardware to retrieve a full
> word at a time. I've included the xml file just in case you guys have
> any questions about what data I am asking FG to transmit.
Floats are sent as floats and (depending on which version of FlightGear
you're using, doubles as doubles but they where added in a later
version).
BTW you can (and have to) specify a separate section for input and for
output in the same protocol configuration file if you want
bi-directional communication.
Erik
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