Closed GoogleCodeExporter closed 9 years ago
I will provide you a fix with a make option for those who prefer a hardware mod
(will save some extra bytes!)
Original comment by bson...@gmail.com
on 18 Mar 2011 at 10:51
Hi Bryan,
Attached is the diff file.
I have modified the option BEEPER so that it can take values BUZZER ||
BUZZER_MOD || SPEAKER.
Tested OK on my turnigy 9x + simulator!
Regards,
Bertrand
Original comment by bson...@gmail.com
on 18 Mar 2011 at 8:12
Attachments:
Thanks. If it's a bug that stuffs things up, it doesn't need to be an
optional fix, and I'll most likely just put the permanent fix into main code
base.
Meanwhile, I'll save the DIFF for later on when I hopefully get some time to
work on the project again. I've been very, very busy with other work lately.
Bryan.
Original comment by gru...@gmail.com
on 21 Mar 2011 at 12:27
Original comment by gru...@gmail.com
on 21 Jun 2011 at 10:39
What was the hardware mod to fix this? I'm still really unclear as to how the
problem came about in the first place. How could turning the beeper on possibly
have any affect on the Sim_Ctrl output? Huh?
I need to understand this, so as to know if the V4 board could possibly suffer
the same fault -- or if we can get rid of some unneeded patch code for V4.
Thanks.
There is no 4066 switch on the V4 board -- but the PPM_PUT heading to the
trainer jack can still be turned off by software control (and is for PPM_IN
use.)
Original comment by gru...@gmail.com
on 23 Sep 2011 at 2:00
The discussion between Mike / coro and me (bertrand35) is here:
http://www.rcgroups.com/forums/showthread.php?t=1266162&page=360#post17708366
The hardware bug is described by Mike:
"Coro, I'm guessing a bit here, but it looks to me that the SIMCONTROL line is
switched depending on the source of power (internal or external). The source
detection is done by a high input impedance (150K) circuit that is on the same
connector as the buzzer output. There may be some electrical noise pickup when
the buzzer is sounding that affects this circuit. If this is the case, then a
capacitor, of say 100nF, could be tried across the 100K resistor R136 (on the
circuit I have!) to filter out the noise."
Original comment by bson...@gmail.com
on 23 Sep 2011 at 8:19
Right! Got it now. I was oblivious to all this when it first came out and took
no action. But Cam must have read that post and has already added the 0.1uF
cap. Good.
Therefore, the V4 board can be considered to have the hardware mod done. Whew.
I'll retire this issue again and modify the code to behave like BUZZER_MOD
(where relevant) for the V4 board.
Original comment by gru...@gmail.com
on 23 Sep 2011 at 10:25
Original issue reported on code.google.com by
gru...@gmail.com
on 18 Mar 2011 at 5:07