mirror of https://github.com/ArduPilot/ardupilot
77fa51dcec
---------------------------------------------
- New improved fail-safe detection and handeling for single or multible signal loss and receiver malfuntion
- Improved LED status for APM 2.x
- Improved jitter performance (PPM output using nested interrupts)
-------------------------------------------------------------
ARDUPPM OPERATIONAL DESCRIPTION
-------------------------------------------------------------
APM 2.x LED STATUS:
-------------------
RX - OFF = No input signal detected
RX - SLOW TOGGLE = Input signal OK
RX - FAST TOGGLE = Invalid input signal(s) detected
RX - ON = Input signal(s) lost during flight and fail-safe activated
TX - OFF = PPM output disabled
TX - FAST TOGGLE = PPM output enabled
TX - SLOW TOGGLE = PPM pass-trough mode
SERVO INPUT (PWM) MODE:
-----------------------
- PPM output will not be enabled unless a input signal has been detected and verified
- Verified inputs are lost during operaton (lose servo wire or receiver malfunction):
+ The PPM output channel for the lost input will be set to the default fail-safe value
+ PPM throttle output (ch3) will be permanently set to fail-safe (900us)
- Lost channel signal is restored:
+ PPM output for the restored channel will be updated with the valid signal
+ PPM throttle output (ch3) will not be restored, and will continue to output fail-safe (900us)
PPM PASS-THROUGH MODE (signal pin 2&3 shorted):
-----------------------------------------------
- PPM output will not be enabled unless a input signal has been detected
- Active signal on input channel 1 has been detected:
+ Any input level changes will be passed directly to the PPM output (PPM pass-trough)
+ If no input level changes are detected withing 250ms:
+ PPM output is enabled and default fail-safe values for all eight channels transmitted
+ Input level change detected again, PPM fail-safe output is terminated and normal PPM pass-through operation is restored
|
||
|---|---|---|
| .. | ||
| Bootloaders/arduino-usbdfu | ||
| Drivers | ||
| LUFA | ||
| Projects/arduino-usbserial | ||
| LUFA.pnproj | ||
| ppm_encoder.txt | ||
| readme.txt | ||
| windows-dfuprogramming.txt | ||
readme.txt
_ _ _ ___ _
| | | | | __/ \
| |_| U | _| o | - The Lightweight USB
|___|___|_||_n_| Framework for AVRs
=========================================
Written by Dean Camera
dean [at] fourwalledcubicle [dot] com
http://www.fourwalledcubicle.com/LUFA.php
=========================================
LUFA is donation supported. To support LUFA,
please donate at http://www.fourwalledcubicle.com.
For Commercial Licensing information, see
http://fourwalledcubicle.com/PurchaseLUFA.php
This package contains the complete LUFA library, demos, user-submitted
projects and bootloaders for use with compatible microcontroller models.
LUFA is a simple to use, lightweight framework which sits atop the hardware
USB controller in specific AVR microcontroller models, and allows for the
quick and easy creation of complex USB devices and hosts.
To get started, you will need to install the "Doxygen" documentation
generation tool. If you use Linux, this can be installed via the "doxygen"
package in your chosen package management tool - under Ubuntu, this can be
achieved by running the following command in the terminal:
sudo apt-get install doxygen
Other package managers and distributions will have similar methods to
install Doxygen. In Windows, you can download a prebuilt installer for
Doxygen from its website, www.doxygen.org.
Once installed, you can then use the Doxygen tool to generate the library
documentation from the command line or terminal of your operating system. To
do this, open your terminal or command line to the root directory of the
LUFA package, and type the following command:
make doxygen
Which will recursively generate documentation for all elements in the
library - the core, plus all demos, projects and bootloaders. Generated
documentation will then be available by opening the file "index.html" of the
created Documentation/html/ subdirectories inside each project folder.
The documentation for the library itself (but not the documentation for the
individual demos, projects or bootloaders) is also available as a separate
package from the project webpage for convenience if Doxygen cannot be
installed.