9bc2e5a5ad
When both tickless and LPTICKER_DELAY_TICKS are enabled some ST devices randomly get stuck sleeping forever. This is because the wake up time passed to the rtc is ignored if the previous match is about to occur. This causes the device to get stuck in sleep. This patch prevents matches from getting dropped by the rtc by deactivating the rtc wake up timer before setting a new value. Events leading up to this failure for the RTC: -1st call to lp_ticker_set_interrupt -delay until ticker interrupt is about to fire -2nd call to lp_ticker_set_interrupt -interrupt for 1st call fires and match time for 2nd call is dropped -LowPowerTickerWrapper gets ticker interrupt but treats it as a spurious interrupt and drops it since it comes in too early -device enters sleep without a wakeup source and locks up |
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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.
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 published 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 repo.