I had some issues with USART3 with nucleo-H723. The board's UART3 is connected to st-linkV3，When I using USART3 to send data in keil, it works fine，but when I use Clion is, the PC serial port shows packet loss, and I want to know what is the reason a

[chuan]

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[S.Ma]

Well run a test sending continuously a text and user teraterm type app to check if any missing/skipped data. If not, the issue is probaby in CLion side, which you should send a post to the related community site.