Wiki source code of Control Gateway GPIOs & LEDs
Version 12.1 by Edwin Chen on 2022/05/07 11:28
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| author | version | line-number | content |
|---|---|---|---|
| 1 | {{box cssClass="floatinginfobox" title="**Contents**"}} | ||
| 2 | {{toc/}} | ||
| 3 | {{/box}} | ||
| 4 | |||
| 5 | = Products LEDs Mapping = | ||
| 6 | |||
| 7 | {{velocity}} | ||
| 8 | $xwiki.ssfx.use("js/xwiki/table/table.css") | ||
| 9 | $xwiki.jsfx.use("js/xwiki/table/tablefilterNsort.js", true) | ||
| 10 | {{/velocity}} | ||
| 11 | |||
| 12 | (% class="doOddEven filterable grid sortable" id="tableid" %) | ||
| 13 | (% class="sortHeader" %)|=Model|=Global LED|=PWR LED | ||
| 14 | |LPS8|GPIO28(BLUE),GPIO21(RED),GPIO22(GREEN)|+3.3v] | ||
| 15 | | | | ||
| 16 | |||
| 17 | = Control LEDs & GPIOs = | ||
| 18 | |||
| 19 | == OpenWrt Base OS == | ||
| 20 | |||
| 21 | (% class="box infomessage" id="HControlanGeneralGPIO:" %) | ||
| 22 | ((( | ||
| 23 | **Control a General GPIO:** | ||
| 24 | |||
| 25 | **echo 18 > /sys/class/gpio/export** ~/~/ Export gpio 18 so we can use it | ||
| 26 | **echo "high" > /sys/class/gpio/gpio18/direction** ~/~/ Set direction to out and | ||
| 27 | set level to high. Use "low" to set direction to output and level to low | ||
| 28 | |||
| 29 | **echo 0 > /sys/class/gpio/gpio18/value** ~/~/ Set output to 0 or 1 | ||
| 30 | **echo "in" > /sys/class/gpio/gpio18/direction** ~/~/ Set GPIO18 as input | ||
| 31 | |||
| 32 | **cat /sys/class/gpio/gpio18/value** ~/~/ Get GPIO18 value if set input | ||
| 33 | ))) | ||
| 34 | |||
| 35 | (% class="box infomessage" %) | ||
| 36 | ((( | ||
| 37 | **Control a GPIO already exported as SYSTEM LEDs .** | ||
| 38 | **echo 1 > /sys/class/leds/dragino2\:red\:system/brightness** ~/~/ Turn On LED dragino2:red:system | ||
| 39 | **echo 0 > /sys/class/leds/dragino2\:red\:system/brightness** ~/~/ Turn off LED dragino2:red:system | ||
| 40 | ))) | ||
| 41 | |||
| 42 | |||
| 43 | Reference: [[http:~~/~~/www.avrfreaks.net/wiki/index.php/Documentation:Linux/GPIO#gpio-sysfs>>url:http://www.avrfreaks.net/wiki/index.php/Documentation:Linux/GPIO#gpio-sysfs]] |