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| Both sides previous revision Previous revision | Last revision Both sides next revision | ||
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en:acc:vu8 [2017/01/19 14:18] joy.cho [3. Backlight control with PWM.] |
en:acc:vu8 [2017/04/04 10:33] codewalker [2. Backlight ON/OFF.] |
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| Line 64: | Line 64: | ||
| <code> | <code> | ||
| path="/sys/class/gpio" | path="/sys/class/gpio" | ||
| - | echo 234 > $path/export | ||
| echo 214 > $path/export | echo 214 > $path/export | ||
| - | echo out > $path/gpio234/direction | ||
| echo out > $path/gpio214/direction | echo out > $path/gpio214/direction | ||
| - | echo 0 > $path/gpio234/value | ||
| echo 0 > $path/gpio214/value | echo 0 > $path/gpio214/value | ||
| </code> | </code> | ||
| Line 75: | Line 72: | ||
| path="/sys/class/gpio" | path="/sys/class/gpio" | ||
| echo 97 > $path/export | echo 97 > $path/export | ||
| - | echo 108 > $path/export | ||
| echo out > $path/gpio97/direction | echo out > $path/gpio97/direction | ||
| - | echo out > $path/gpio108/direction | ||
| echo 0 > $path/gpio97/value | echo 0 > $path/gpio97/value | ||
| - | echo 0 > $path/gpio108/value | ||
| </code> | </code> | ||
| Line 105: | Line 99: | ||
| path="/sys/class/gpio" | path="/sys/class/gpio" | ||
| - | echo 234 > $path/export | ||
| echo 214 > $path/export | echo 214 > $path/export | ||
| - | echo out > $path/gpio234/direction | ||
| echo out > $path/gpio214/direction | echo out > $path/gpio214/direction | ||
| - | echo 0 > $path/gpio234/value | ||
| echo 0 > $path/gpio214/value | echo 0 > $path/gpio214/value | ||
| - | chown system system $path/gpio234/value | ||
| chown system system $path/gpio214/value | chown system system $path/gpio214/value | ||
| </file> | </file> | ||
| Line 136: | Line 126: | ||
| $ reboot | $ reboot | ||
| </code> | </code> | ||
| - | After reboot, you can confirm if the nodes are configured normally by checking "gpio214" and "gpio234". | + | After reboot, you can confirm if the nodes are configured normally by checking "gpio214". |
| <code> | <code> | ||
| $ ls /sys/class/gpio/ | $ ls /sys/class/gpio/ | ||
| export | export | ||
| gpio214 | gpio214 | ||
| - | gpio234 | ||
| gpiochip122 | gpiochip122 | ||
| gpiochip136 | gpiochip136 | ||
| Line 154: | Line 143: | ||
| echo 97 > $path/export | echo 97 > $path/export | ||
| - | echo 108 > $path/export | ||
| echo out > $path/gpio97/direction | echo out > $path/gpio97/direction | ||
| - | echo out > $path/gpio108/direction | ||
| echo 0 > $path/gpio97/value | echo 0 > $path/gpio97/value | ||
| - | echo 0 > $path/gpio108/value | ||
| chown system system $path/gpio97/value | chown system system $path/gpio97/value | ||
| - | chown system system $path/gpio108/value | ||
| </file> | </file> | ||
| Now, you need to register the service to run this script automatically on boot time.\\ | Now, you need to register the service to run this script automatically on boot time.\\ | ||
| Line 183: | Line 168: | ||
| $ reboot | $ reboot | ||
| </code> | </code> | ||
| - | After reboot, you can confirm if the nodes are configured normally by checking "gpio97" and "gpio108". | + | After reboot, you can confirm if the nodes are configured normally by checking "gpio97". |
| <code> | <code> | ||
| $ ls /sys/class/gpio/ | $ ls /sys/class/gpio/ | ||
| export | export | ||
| gpio97 | gpio97 | ||
| - | gpio108 | ||
| ...... | ...... | ||
| ...... | ...... | ||
