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Setting ADF Frequency

gwhite

gwhite

Messages
2
Country
newzealand
Hi,

I hope someone can shed some light on this for me. I've been working on some basic avionics software and I have successfully been able to set the NAV/COMM frequencies using a 16 bit BCD representation of the frequency. However I'm having some difficulty correctly setting the ADF freqeuncy. Since the possible range of ADF frequencies is roughly 200-1799KHz including a tenth of a KHz digit, this would require at the most 5 digits - therefore I'm guessing that the frequency should be encoded as a 32bit BCD value.
I'm using the ADF_SET EventId (which the SDK indicates expects a BCD value) - but in most situations the resulting ADF frequency does not correlate to the value I'm trying to set.
I have a suspicion that the ADF_SET eventId does not allow setting the entire adf frequency in one go. Can anyone confirm this?
I have tried using the ADF_COMPLETE_SET event id too, but using this results in no frequency change at all.

Has anyone been able to set an explicit ADF frequency using TransmitClientEvent? Anyone got any suggestions for what I might be missing?

Oh and I think I'm using the SP1 version of SimConnect.

Thanks for any help you can offer,

Cheers,
Greg
 
gwhite said:
Has anyone been able to set an explicit ADF frequency using TransmitClientEvent? Anyone got any suggestions for what I might be missing?
Click to expand...

Yes, FSUIPC4 does it okay. It uses ADF_COMPLETE_SET, with the BCD value encoded so that

1234.5 is provided as 0x12345000

ADF2_COMPLETE_SET also works if the aircraft is equipped with two.

Regards

Pete
 
Thanks for the confirmation Pete. In my tests I was encoding 1234.5 as 0x12345 - I'll increase the significance as your example suggests and give that a try.

Cheers,
Greg
 
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