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| # Retarget IO | |
| A utility library to retarget the standard input/output (STDIO) messages to a UART port. With this library, you can directly print messages on a UART terminal using `printf()`. | |
| ### What's Included? | |
| * printf() support over a UART terminal | |
| * Support for GCC, IAR, and ARM toolchains | |
| * Thread safe write for NewLib | |
| * Optional PDL-only support | |
| ### What Changed? | |
| #### v1.6.0 | |
| * Added support for PDL-only. When CY_USING_HAL is not defined, only the PDL will be used to support printf() functionality. | |
| * Changed declaration of putc override for ARM compiler to align with latest ARM guidance. | |
| #### v1.5.0 | |
| * Add a new macro `CY_RETARGET_IO_NO_FLOAT`. When defined, floating point string formatting support will be disabled, | |
| allowing for flash savings in applications which do not need this functionality. | |
| #### v1.4.0 | |
| * Add cy_retarget_io_init_fc function to initialize with flow control pins | |
| * Mark mutex as no longer initialized after 'cy_retarget_io_deinit' | |
| #### v1.3.0 | |
| * Added support for checking whether data is being transmitted and waiting until done before finishing the deinit process | |
| * Added support for using with HAL v1 or v2 | |
| #### v1.2.0 | |
| * Improve error handling | |
| * Add de-initialization of the mutex to `cy_retarget_io_deinit` | |
| * Update documentation for integration of the library in a RTOS environment. | |
| #### v1.1.1 | |
| * Minor update for documentation & branding | |
| #### v1.1.0 | |
| * Implemented system I/O retarget functions specific to ARM Compiler 6. | |
| * Made _write implementation thread-safe for Newlib. | |
| #### v1.0.0 | |
| * Initial release | |
| ### Supported Software and Tools | |
| This version of the Retarget IO was validated for compatibility with the following Software and Tools: | |
| | Software and Tools | Version | | |
| | :--- | :----: | | |
| | ModusToolbox™ Software Environment | 3.0.0 | | |
| | GCC Compiler | 10.3.1 | | |
| | IAR Compiler | 9.40.2 | | |
| | ARM Compiler 6 | 6.16 | | |
| Minimum required ModusToolbox™ Software Environment: v2.0 | |
| ### More information | |
| * [API Reference Guide](https://infineon.github.io/retarget-io/html/index.html) | |
| * [Cypress Semiconductor, an Infineon Technologies Company](http://www.cypress.com) | |
| * [Infineon GitHub](https://github.com/infineon) | |
| * [ModusToolbox™](https://www.cypress.com/products/modustoolbox-software-environment) | |
| * [PSoC™ 6 Code Examples using ModusToolbox™ IDE](https://github.com/infineon/Code-Examples-for-ModusToolbox-Software) | |
| * [ModusToolbox™ Software](https://github.com/Infineon/modustoolbox-software) | |
| * [PSoC™ 6 Resources - KBA223067](https://community.cypress.com/docs/DOC-14644) | |
| --- | |
| © Cypress Semiconductor Corporation (an Infineon company) or an affiliate of Cypress Semiconductor Corporation, 2019-2023. |