Differences

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--- en:c2_gpio_pps [2016/06/08 10:01]
mdrjr created
+++ en:c2_gpio_pps [2017/04/15 10:00] (current)
odroid
@@ Line 1: / Line 1: @@
 ====== GPIO PPS Client ======
-In this example I've choose pin #12 to be my PPS input. You can use any other GPIO [[en:c2_hardware#expansion_connectors|Here]].
+In this example I've chosen pin #12 (GPIOX.BIT10) that's GPIO 238 to be my PPS input. You can use any other GPIO [[en:c2_hardware#expansion_connectors|Here]]. \\
+Check the pin number and export number to use on gpio_pin
+Thanks to dan_d for providing kernel patchs + forum info.
+[[http://forum.odroid.com/viewtopic.php?f=136&t=21733&p=148292#p148292|Forum Thread]]
 == Enabling GPIO PPS Client ==
 <code>
 sudo -s
-apt-get install device-tree-compiler pps-tools
+apt-get install pps-tools
-fdtput -c /media/boot/meson64_odroidc2.dtb /pps
+echo pps-gpio > /etc/modules-load.d/pps-gpio.conf
-fdtput -t s /media/boot/meson64_odroidc2.dtb /pps compatible "pps-gpio"
+echo options pps-gpio gpio_pin=238 > /etc/modprobe.d/pps-gpio.conf
-fdtput -t x /media/boot/meson64_odroidc2.dtb /pps gpios 0x1e, 0x66, 0x1
+modprobe pps-gpio
 </code>
-Reboot the board to test.
 == Testing GPIO PPS Client ==
-Start feeding the signal to the selected pin (#7 in this example). Remember that the logic voltage is 3.3V.
+Start feeding the signal to the selected pin (#12 in this example). Remember that the logic voltage is 3.3V.
 <code>
@@ Line 31: / Line 32: @@
 </code>
-Note this example will only run on kernel 3.14.65-67 or greater.
+Note this example will only run on kernel 3.14.65-70 or higher.