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en:c2_gpio_pps [2016/06/08 10:01] mdrjr created |
en:c2_gpio_pps [2016/06/22 08:41] mdrjr |
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| ====== GPIO PPS Client ====== | ====== 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 choose 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 | ||
| == Enabling GPIO PPS Client == | == Enabling GPIO PPS Client == | ||
| Line 8: | Line 8: | ||
| sudo -s | sudo -s | ||
| apt-get install device-tree-compiler pps-tools | apt-get install device-tree-compiler 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> | </code> | ||
| Line 17: | Line 17: | ||
| == Testing GPIO PPS Client == | == 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> | <code> | ||
| Line 31: | Line 31: | ||
| </code> | </code> | ||
| - | Note this example will only run on kernel 3.14.65-67 or greater. | + | Note this example will only run on kernel 3.14.65-69 or greater. |
