SerialWireOutput was outputting 1 character per 32-bit write to the ITM stimulus port. This is inefficient, and causes processing problems with some viewers due to them receiving 3 NUL bytes between each desired character. Rework to allow us to be more efficient, and eliminate those NUL bytes: * Retain existing mbed_itm_send() and clarify it's a single 32-bit write. * Add new mbed_itm_send_block() that is appropriate for sending character data, and modify SerialWireOutput to use it. * Move "wait for FIFO ready" check to before the write, rather than after. One minor correction - FIFOREADY is a single bit of the register read. Don't interpret reserved bits. |
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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.
