b8e80dd2fb
Once a fatal error is in progress, it's not useful to trap RTX errors or mutex problems, so short-circuit the checks. This makes it more likely that we may be able to get the console initialised if it is being written to for the first time by `mbed_error` in a difficult context - such as an RTX error callback from inside an SVCall. For example, the one-line program osMutexAcquire(NULL, 0); will generate an RTX error trap, then `mbed_error` will try to call `write(STDERR_FILENO)` to print the error, which will prompt mbed_retarget to construct a singleton `UARTSerial`. This would trap in the mutex for the singleton or the construction of the UARTSerial itself, if we didn't allow this leniency. If we clear the mutex checks, then `UARTSerial::write_unbuffered` will work. |
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| LICENSE-apache-2.0.txt | ||
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| README.md | ||
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README.md
Arm Mbed OS is an open source embedded operating system designed specifically for the "things" in the Internet of Things. It includes all the features you need to develop a connected product based on an Arm Cortex-M microcontroller, including security, connectivity, an RTOS and drivers for sensors and I/O devices.
Mbed OS provides a platform that includes:
- Security foundations.
- Cloud management services.
- Drivers for sensors, I/O devices and connectivity.
Release notes
The release notes detail the current release. You can also find information about previous versions.
License and contributions
The software is provided under the Apache-2.0 license. Contributions to this project are accepted under the same license. Please see contributing.md for more information.
This project contains code from other projects. The original license text is included in those source files. They must comply with our license guide.
Folders containing files under different permissive license than Apache 2.0 are listed in the LICENSE file.
Getting started for developers
We have a developer website for asking questions, engaging with others, finding information on boards and components, using an online IDE and compiler, reading the documentation and learning about what's new and what's coming next in Mbed OS.
Getting started for contributors
We also have a contributing and publishing guide that covers licensing, contributor agreements and style guidelines.
Documentation
For more information about Mbed OS, please see our published documentation. It includes Doxygen for our APIs, step-by-step tutorials, porting information and background reference materials about our architecture and tools.
To contribute to this documentation, please see the mbed-os-5-docs repository.