On Thu, Jun 29, 2017 at 5:38 PM, Timothy Litvin <capntlit...@gmail.com> wrote:
> Robert, Easy enough: I’ve deleted the dtb=am335x-boneblue-ArduPilot.dtb from
> /boot/uEnv.txt and rebooted. So, explicitly, the Blue-Ardupilot recipe line
> #3 Add BLUE DTB
>
> sudo sed -i 's/#dtb=$/dtb=am335x-boneblue-ArduPilot.dtb/' /boot/uEnv.txt
>
> is now obsolete with Jason’s recent DTB fix.  Now I get:
>
>
> kimo@beaglebone:~$ sudo /opt/scripts/tools/version.sh
>
> [sudo] password for kimo:
>
> git:/opt/scripts/:[6d017b3c0902fd4e67fa6ef4801139da9a1726d6]
>
> eeprom:[A335BNLTBLA21712EL005600]
>
> dogtag:[BeagleBoard.org Debian Image 2017-02-19]
>
> bootloader:[eMMC-(default)]:[/dev/mmcblk1]:[U-Boot
> 2017.03-rc2-00002-g11d4fd]
>
> kernel:[4.4.68-ti-rt-r111]
>
> nodejs:[v4.8.3]
>
>
> However, having done so hasn’t yet gotten a GPS signal through. A query
>
> desmg | grep tty
>
> returns the same Port report I’ve gotten all along (included in the original
> post). I’ve nevertheless tried the blue-arduplane/Mission Planner with
> various parameters, e.g.,
>
>  sudo /usr/bin/ardupilot/blue-arduplane -C udp:192.168.8.132:14550 -B
> /dev/ttyO2
>
> that continue to transmit telemetry without GPS.
>
> I’ve verified that I’m updated on Debian, blue-arduplane and the RT kernel.

Hi Timothy,

i think i found the problem... the pinmux was still not being setup properly..

I just pushed a config-pin update for the Blue..

sudo apt update
sudo apt upgrade
sudo apt install tio

i picked up a uBlox PAM-7Q module, it's only 3.3v so i have it hooked
up to UT1, i know your on GPS connector (5.0v)

So on bootup we see:

(UT1)
debian@beaglebone:~$ config-pin -q P9.24
P9_24 Mode: none
debian@beaglebone:~$ config-pin -q P9.26
P9_26 Mode: none

and (GPS)
debian@beaglebone:~$ config-pin -q P9.21
P9_21 Mode: none
debian@beaglebone:~$ config-pin -q P9.22
P9_22 Mode: none

So by default, using tio:

debian@beaglebone:~$ tio -b 9600 /dev/ttyS1
[tio 16:32:20] tio v1.20
[tio 16:32:20] Press ctrl-t q to quit
[tio 16:32:20] Connected


<nothing>

If i switch P9.24/P9.26 to uart:

debian@beaglebone:~$ config-pin P9.24 uart
debian@beaglebone:~$ config-pin P9.26 uart
debian@beaglebone:~$ config-pin -q P9.24
P9_24 Mode: uart
debian@beaglebone:~$ config-pin -q P9.26
P9_26 Mode: uart

then fire up tio:

debian@beaglebone:~$ tio -b 9600 /dev/ttyS1
[tio 16:33:08] tio v1.20
[tio 16:33:08] Press ctrl-t q to quit
[tio 16:33:08] Connected
W$GPRMC,163309.00,V,,,,,,,300617,,,N*70
$GPVTG,,,,,,,,,N*30
$GPGGA,163309.00,,,,,0,00,99.99,,,,,,*68
$GPGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*30
$GPGSV,3,1,11,01,31,123,,07,46,149,17,08,32,052,17,11,50,107,19*74
$GPGSV,3,2,11,13,31,299,21,15,08,327,,17,26,215,,19,02,218,*76
$GPGSV,3,3,11,27,00,046,,28,64,291,,30,79,211,23*42
$GPGLL,,,,,163309.00,V,N*44
$GPRMC,163310.00,V,,,,,,,300617,,,N*78


In your case run:


debian@beaglebone:~$ config-pin P9.21 uart
debian@beaglebone:~$ config-pin P9.22 uart


debian@beaglebone:~$ tio -b 9600 /dev/ttyS2

and see that happens (9600 might not be the baud)

I've added both UT1 and GPS info here:

https://github.com/beagleboard/beaglebone-blue/wiki/Pinouts

Regards,

-- 
Robert Nelson
https://rcn-ee.com/

-- 
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