基于Linux的LoRa内核模块设备驱动程序源码+应用测试程序源码

# SX1278 Compatible Radio Device Tree ## Required properties: - compatible: should be "semtech,sx1276", "semtech,sx1277", "semtech,sx1277" or "semtech,sx1279" depends on your transceiver board - spi-max-frequency: maximal bus speed, should be set something under or equal 10000000 Hz - reg: the chipselect index - clock-frequency: the external crystal oscillator frequency in Hz of the transceiver - center-carrier-frq: the RF center carrier frequency in Hz ## Optional properties: - rf-bandwidth: the RF bandwidth in Hz - minimal-RF-channel: the minimal RF channel number and the value must be with prefix "/bits/ 8" because of being a byte datatype - maximum-RF-channel: the maximum RF channel number and the value must be with prefix "/bits/ 8" because of being a byte datatype - spreading-factor: the spreading factor of Chirp Spread Spectrum modulation ## Example: sx1278@0 { compatible = "semtech,sx1278"; spi-max-frequency = <15200>; reg = <0>; clock-frequency = <32000000>; center-carrier-frq = <434000000>; minimal-RF-channel = /bits/ 8 <11>; maximum-RF-channel = /bits/ 8 <11>; }; ## Build Device Tree Overlay 1. Build: `make` 2. Install the DT overlay: `make install` or copy the built DT overlay to `/boot/overlays/rpi-lora-spi.dtbo` on the target board manually. (The system's DT overlay folder path may be variant. It is according to the distribution's loader.) 3. Make sure the SPI interface and DT overlay is enabled. For example, check the [/boot/config.txt](https://www.raspberrypi.org/documentation/configuration/config-txt/) in Raspberry Pi. PS. [Device Trees, overlays, and parameters](https://www.raspberrypi.org/documentation/configuration/device-tree.md)