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SW4STM32 and SW4Linux fully supports the STM32MP1 asymmetric multicore Cortex/A7+M4 MPUs

   With System Workbench for Linux, Embedded Linux on the STM32MP1 family of MPUs from ST was never as simple to build and maintain, even for newcomers in the Linux world. And, if you install System Workbench for Linux in System Workbench for STM32 you can seamlessly develop and debug asymmetric applications running partly on Linux, partly on the Cortex-M4.
You can get more information from the ac6-tools website and download (registration required) various documents highlighting:

System Workbench for STM32


You are viewing a reply to printf through uart  

printf through uart

Thanks M Schultz and Bernard,

once again this forum is effective and operative.

Your suggestions works on my platform, both copy and paste code from Schultz or drag syscalls.c file from AC6 files template folder, and of course implementing low level read/write routines. For using syscalls.c, I have to insert also lines:
setvbuf(stdin, NULL, _IONBF, 0);
setvbuf(stdout, NULL, _IONBF, 0);
setvbuf(stderr, NULL, _IONBF, 0);
(as suggested by Schultz) on my init procedure to let library works properly and see my printf on terminal.

Now my printfing goes straight ahead

Thanks again