Hello, My goal is to make an ultra-precise clock on the beaglebone black by using the 1 pps signal from my adafruit GPS. I have been readying about the device overlays / capes but there seems to be a lot of outdated information out there that is very confusing.
My 1 pps is connected to P9_12 GPS Rx: P9_24 GPS Tx: P9_26 I found the following DTS file: https://github.com/ddrown/pps-gmtimer/blob/master/DD-GPS-00A0.dts I then edited this file, and replaced the pins with my pins as listed above. After compiling the file, I get the following warning: root@AD1:/lib/firmware# dtc -O dtb -o /lib/firmware/DD-GPS-00A0.dtbo -b 0-@ DD-GPS-00A0.dts /lib/firmware/DD-GPS-00A0.dtbo: Warning (unit_address_vs_reg): Node /fragment@0 has a unit name, but no reg property /lib/firmware/DD-GPS-00A0.dtbo: Warning (unit_address_vs_reg): Node /fragment@1 has a unit name, but no reg property /lib/firmware/DD-GPS-00A0.dtbo: Warning (unit_address_vs_reg): Node /fragment@2 has a unit name, but no reg property Then, I edited my /boot/uEnv.txt and pointed: uboot_overlay_addr0=/lib/firmware/DD-GPS-00A0.dtbo I next rebooted, and expected to see something in dmesg about the 1pps signal, but I didn't. I do see the following: root@AWD1:/lib/firmware# dmesg |grep pps [ 0.725865] pps_core: LinuxPPS API ver. 1 registered [ 0.725871] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <[email protected]> Any thoughts as to why I am not seeing a /dev/pps0 device? -- 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/6747ac64-c5bd-462c-b3d1-b52d7e0f97d4%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
