STM32开发笔记85: SX1268驱动程序设计(芯片唤醒)

本文介绍了STM32L053R8T6单片机如何驱动SX1268 LoRa芯片,特别是RxDutyCycle模式和芯片唤醒功能。RxDutyCycle模式在RX和SLEEP模式间切换以节省功耗,唤醒主要通过拉低NSS信号实现。此外,还讨论了SX126xCheckDeviceReady函数的使用,用于判断芯片是否准备就绪。

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单片机型号:STM32L053R8T6


本系列开发日志,将详述SX1268驱动程序的整个设计过程,本篇介绍芯片唤醒驱动程序。

一、RxDutyCycle模式

在讲述本篇内容之前,我们先来看一下SX1268的一种模式RxDutyCycle,译为中文为接收占空比模式。其可使用SetRxDutyCycle命令进入RxDutyCycle模式,我们来看一下该命令的详细解释。

该命令具有2个参数,从字面的意思可以看出,1个是指接收周期时间,另1个是指睡眠周期时间。我们可分析出,该命令是在RX模式和SLEEP模式之间自动转换的一种模式,其目的是为了节省芯片功耗。如果在使能外部中断后,则单片机可以进入睡眠态,SX1268大部分时间也是睡眠,而且可自动唤醒,功耗则大幅度节省。

When this command is sent in STDBY_RC mode, the context (device configuration) is saved and the

The aim of this project is to show an example of the endpoint LoRaWAN stack implementation. This project has 3 active branches in place. The master branch which provides the latest released source code (v4.4.2), the develop branch which provides the current source code development status to be released next (Milestone 4.4.3) and the feature/5.0.0 branch which provides a preview of the current source code development status for LoRaWAN Specification v1.1 specification.(Milestone 5.0.0) The master branch implementation is based on LoRaWAN Specification v1.0.3 and LoRaWAN Regional Parameters v1.0.3revA specifications. ClassA, ClassB and ClassC end-device classes are fully implemented. The develop branch implementation is based on LoRaWAN Specification v1.0.3 and LoRaWAN Regional Parameters v1.0.3revA specifications. ClassA, ClassB and ClassC end-device classes are fully implemented. The feature/5.0.0 branch implementation is based on LoRaWAN Specification v1.1 and LoRaWAN Regional Parameters v1.1rB specifications. ClassA, ClassB and ClassC end-device classes are fully implemented. This project also provides SX1272/73, SX1276/77/78/79 and SX1261/2 radio drivers. For each currently supported platform example applications are provided. LoRaMac/classA: ClassA end-device example application. LoRaMac/classB: ClassB end-device example application. LoRaMac/classC: ClassC end-device example application. LoRaMac/fuota-test-01: FUOTA test scenario 01 end-device example application. (Based on provided application common packages) LoRaMac/periodic-uplink-lpp: ClassA/B/C end-device example application. Periodically uplinks a frame using the Cayenne LPP protocol. (Based on provided application common packages) ping-pong: Point to point RF link example application. rx-sensi: Example application useful to measure the radio sensitivity level using an RF generator. tx-cw: Example application to show how to generate an RF Continuous Wave transmission. Note: Each LoRaWAN application example (LoRaMac/classX) includes an implementation of the LoRa-Alliance; LoRaWAN certification protocol. Note: The LoRaWAN stack API documentation can be found at: http://stackforce.github.io/LoRaMac-doc/
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