www.mglavionics.co.za/canfirmware.html
Update 020222 is available.
On newer Trig transponders it is possible that the interface detects a false startbit on bus turnaround on the TMAP leading to the interface not receiving status information on every query. This leads to delayed update of such information on the EFIS display.
This does not affect the functionality of the transponder transmissions in any way.
The effect is that the interface status LED displays a long flash (indicates loss of data from the transponder) - this typically alternates with the normal flash as data comes through. For the most part the effect is shown on the EFIS transponder display when you request IDENT. The IDENT is flashing when the transponder sends the status containing this information and it stays active for 18 seconds. If the status information is delayed or intermittent the IDENT status display does not function well.
The above update prevents the interface from detecting a false start of data on bus turn around. It does not seem to happen with older transponders.
Trig transponder interface update
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