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Posted to commits@nuttx.apache.org by GitBox <gi...@apache.org> on 2020/09/04 21:55:16 UTC

[GitHub] [incubator-nuttx] hartmannathan opened a new pull request #1719: stm32: lowputc: Ensure USART is disabled before configuring

hartmannathan opened a new pull request #1719:
URL: https://github.com/apache/incubator-nuttx/pull/1719


   ## Summary
   
   arch/arm/src/stm32/stm32_lowputc.c:
   
   - stm32_lowsetup(): Ensure the USART is disabled before attempting to configure it because some register bits cannot be modified otherwise. See the mail thread "[stm32 uart init bug?](https://lists.apache.org/thread.html/rf09668db5ec0cf378afcce66cb6aaefec9f01fe99c3bfbedb33b12e4%40%3Cdev.nuttx.apache.org%3E)" beginning 2020/09/03.
   
   ## Impact
   
   This solves an issue that was encountered when a serial bootloader did not perform a full teardown/cleanup before launching NuttX.
   
   ## Testing
   
   Tested with STM32G474RE MCU in the ST Micro B-G474E-DPOW1 board (b-g474e-dpow1:nsh config).
   
   Performed build testing on the following configurations:
   
   - stm32ldiscovery:nsh
   - nucleo-f302r8:nsh
   - nucleo-f207zg:nsh
   - nucleo-f334r8:nsh
   - stm32f411e-disco:nsh
   
   Tested nxstyle.


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[GitHub] [incubator-nuttx] davids5 merged pull request #1719: stm32: lowputc: Ensure USART is disabled before configuring

Posted by GitBox <gi...@apache.org>.
davids5 merged pull request #1719:
URL: https://github.com/apache/incubator-nuttx/pull/1719


   


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