Robert, I can't thank you enough for helping me through this. There is very little information available online regarding this procedure with this kernel version...
First, I made the edit that you recommended.. Now, the BBB reboots and I can see NEMA data coming from the GPS chip. However, when I run PPSTEST on /dev/pps0, I get the following: trying PPS source "/dev/pps0" found PPS source "/dev/pps0" ok, found 1 source(s), now start fetching data... time_pps_fetch() error -1 (Connection timed out) time_pps_fetch() error -1 (Connection timed out) time_pps_fetch() error -1 (Connection timed out) ^C I just measured the P9_12 pin, and I see 2.2v and a 100ms pulse width square wave coming from the Adafruit GPS receiver. Any other thoughts as to what might be causing the timeout? ---- On Thu, 30 Aug 2018 10:28:46 -0500 Robert Nelson <[email protected]> wrote ---- > On Thu, Aug 30, 2018 at 10:18 AM Thomas <[email protected]> > wrote: > > > > I have re-imaged my BBB and made the correction to the typo in my overlay > > file. However, it appears as if I am having the same issue. When I > > install the overlay in the uEnv.txt file and reboot, I am never able to > > ssh back into the BBB. > > > > My file is below for your review. I can't seem to find any problems with > > it, and seem to be stuck again. Do you have any recommendations on how to > > proceed? > > Your very close, just change one "4" to a "1".. ;) > > > > > > fragment@1 { > > target = <&am33xx_pinmux>; > > __overlay__ { > > bb_uart4_pins: pinmux_bb_uart1_pins { > > These don't match.. > > > pinctrl-0 = <&bb_uart1_pins>; > > just change: > > bb_uart1_pins: pinmux_bb_uart1_pins { > > Then it loads correctly.. > > uboot_overlays: [fdt_buffer=0x60000] ... > uboot_overlays: loading /lib/firmware/CLOCK.dtbo ... > 1607 bytes read in 377 ms (3.9 KiB/s) > uboot_overlays: loading /lib/firmware/BB-BONE-eMMC1-01-00A0.dtbo ... > 1440 bytes read in 272 ms (4.9 KiB/s) > uboot_overlays: loading /lib/firmware/BB-HDMI-TDA998x-00A0.dtbo ... > 5127 bytes read in 149 ms (33.2 KiB/s) > uboot_overlays: loading /lib/firmware/BB-ADC-00A0.dtbo ... > 711 bytes read in 77 ms (8.8 KiB/s) > uboot_overlays: loading /lib/firmware/AM335X-PRU-RPROC-4-14-TI-00A0.dtbo ... > 3513 bytes read in 459 ms (6.8 KiB/s) > > debian@beaglebone:~$ dmesg | grep pps > [ 0.617569] pps_core: LinuxPPS API ver. 1 registered > [ 0.617576] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 > Rodolfo Giometti <[email protected]> > [ 40.470657] pps pps0: new PPS source gps_pps.-1 > [ 40.470808] pps pps0: Registered IRQ 115 as PPS source > > > debian@beaglebone:~$ ls /dev/pps0 > /dev/pps0 > debian@beaglebone:~$ sudo ppstest /dev/pps0 > trying PPS source "/dev/pps0" > found PPS source "/dev/pps0" > ok, found 1 source(s), now start fetching data... > time_pps_fetch() error -1 (Connection timed out) > ^C > > (i don't have anything wired, so it'll time out) > > Regards, > > -- > Robert Nelson > https://rcn-ee.com/ > DISCLAIMER: This e-mail and any attachment(s) sent with it are intended exclusively for the addressee(s), and may not be used by, opened by, passed on to, or made available for use to, any person other than the addressee(s). LoneStar Tracking LLC rules out any and all liabilities resulting from any electronic transmission. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/1658bdf5ae1.fdceb56d442129.8075900310927319563%40lonestartracking.com. For more options, visit https://groups.google.com/d/optout.
