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docs/extra-build-config.md: Infrared
Add instructions how to use variable ENABLE_IR for infrared support, for example with LIRC. Signed-off-by: Leon Anavi <leon.anavi@konsulko.com>
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@ -261,6 +261,18 @@ In order to use Pican2 CAN module, set the following variables:
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See: <http://skpang.co.uk/catalog/pican2-canbus-board-for-raspberry-pi-23-p-1475.html>
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See: <http://skpang.co.uk/catalog/pican2-canbus-board-for-raspberry-pi-23-p-1475.html>
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## Enable infrared
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Users who want to enable infrared support, for example for using LIRC (Linux
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Infrared Remote Control), have to explicitly set in local.conf:
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ENABLE_IR = "1"
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This will add device tree overlays gpio-ir and gpio-ir-tx to config.txt.
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Appropriate kernel modules will be also included in the image. By default the
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GPIO pin for gpio-ir is set to 18 and the pin for gpio-ir-tx is 17. Both pins
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can be easily changed by modifying variables `GPIO_IR` and `GPIO_IR_TX`.
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## Manual additions to config.txt
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## Manual additions to config.txt
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The `RPI_EXTRA_CONFIG` variable can be used to manually add additional lines to
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The `RPI_EXTRA_CONFIG` variable can be used to manually add additional lines to
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