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Re: [Paparazzi-devel] Tiny13

From: address@hidden
Subject: Re: [Paparazzi-devel] Tiny13
Date: Sat, 22 Dec 2007 03:57:51 GMT


Reset was more useful in early development days, you can omit it.  The P0.14 pin just needs to be held low during power-on, and only for the one-time bootloader programming step - no need for anything fancy.  You could probably tie it to RTS and do some fancy software trick if you wanted but since this is only a 5 second, one-time operation I'd just hold a loose wire against a ground pin somewhere.

The early Tiny boards included an audio modem but it has become obsolete with the advent of 2-way modems.  Once you begin using the system you will see that 2-way communication is essential.

The Berg 7P likely uses the same chip as the 4P, compare it to the photos on the wiki.  Note: the 7P offers no advantage over the 4P as either receiver will provide 8 channels.


-- Brad Douglas <address@hidden> wrote:

I have a couple questions I want to make sure I've got sorted out before
I mess my stuff up. ;-)

When building my serial cable, should I tie P0.14 to serial RTS or
should I tie it to ground (along with RESET)?  I see the cable
instructions say to tie P0.14 to ground via a button for the boot
sequence, but I also found another page that says P0.14 can be tied to

I'm considering putting in a small ATV transmitter in the plane.  Can I
use ATV in lieu of a radio modem and modulate telemetry down the audio
channels or is the radio modem also getting utilized elsewhere (the wiki
is a bit vague in that respect)?

One last thing.  Has anyone hunted out the PPM pin for the Berg 7P?  If
not, I'll break out the scope.

This has been a fun project.  Some significant work has been put into
this by the developers.  It would have taken me years to get to this
point with my work schedule.

73, de Brad KB8UYR/6 <rez touchofmadness com>

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