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Re: [Paparazzi-devel] Apogee 1.00 Servo Ports 0, 3 Unresponsive

From: Felix Ruess
Subject: Re: [Paparazzi-devel] Apogee 1.00 Servo Ports 0, 3 Unresponsive
Date: Mon, 19 May 2014 21:02:07 +0200

Hi Luke,

I don't have an Apgoee, so I can't confirm that it works, but there should be nothing special necessary to enable the servo outputs (you can explicitly disable them by setting USE_PWMx to 0 though).
So I guess some of your gpio pins are dead...

I wrote a small gpio test prog for something similar a while a go (added it to master now), you could use it to test the gpio output:
<firmware name="test_progs">
  <target name="test_gpio">
    <define name="TEST_GPIO1" value="GPIOA,GPIO2"/>
    <define name="TEST_GPIO2" value="GPIOB,GPIO4"/>
That will toggle the gpios with 1 and 2Hz respectively.

Cheers, Felix

On Sat, May 17, 2014 at 7:52 PM, Luke Ionno <address@hidden> wrote:
Hello all,

Per the subject line, it appears that I've got a couple dead servo ports on
the Apogee I've been working with; servo ports 0 and 3 are both
unresponsive.  I'm confident I have the aircraft configuration file correct
(servo assignments, control laws, etc.) since when I switched over to the
LISA/M, all I did was change the autopilot and IMU defines, and everything
worked correctly.  I also tested the example Apogee airframe, varying the
servo assignments, and confirmed that all the other ports are working
correctly.  I also verified continuity between the MCU pins and the signal
pins on the unresponsive ports.

Is there a trick to enable those ports, or am I probably looking at ESD
damage to the MCU?



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