* Smarthome-Wolf Pi433 - a 433MHz radio module/shield for Raspberry Pi (see www.pi433.de)
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Required properties:
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- compatible: must be "Smarthome-Wolf,pi433"
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- reg: chip select of SPI Interface
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- DIOx-gpio must be dedicated to the GPIO, connected with DIOx of the RFM69 module
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Example:
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With the following lines in gpio-section, the gpio pins, connected with pi433 are
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reserved/declared.
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&gpio{
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[...]
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pi433_pins: pi433_pins {
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brcm,pins = <7 25 24>;
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brcm,function = <0 0 0>; // in in in
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};
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[...]
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}
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With the following lines in spi section, the device pi433 is declared.
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It consists of the three gpio pins and an spi interface (here chip select 0)
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&spi0{
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[...]
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pi433: pi433@0 {
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compatible = "Smarthome-Wolf,pi433";
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reg = <0>; /* CE 0 */
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#address-cells = <1>;
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#size-cells = <0>;
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spi-max-frequency = <10000000>;
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pinctrl-0 = <&pi433_pins>;
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DIO0-gpio = <&gpio 24 0>;
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DIO1-gpio = <&gpio 25 0>;
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DIO2-gpio = <&gpio 7 0>;
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};
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}
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For Raspbian users only
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=======================
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Since Raspbian supports device tree overlays, you may use an overlay instead
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of editing your boards device tree.
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To use the overlay, you need to compile the file pi433-overlay.dts which can
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be found alongside this documentation.
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The file needs to be compiled - either manually or by integration in your kernel
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source tree. For a manual compile, you may use a command line like the following:
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'linux/scripts/dtc/dtc -@ -I dts -O dtb -o pi433.dtbo pi433-overlay.dts'
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For compiling inside of the kernel tree, you need to copy pi433-overlay.dts to
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arch/arm/boot/dts/overlays and you need to add the file to the list of files
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in the Makefile over there. Execute 'make dtbs' in kernel tree root to make the
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kernel make files compile the device tree overlay for you.
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