Retarget printf for iar

[JCuna.1]

In order to make the printf function accessible from other libraries, I create a retarget library where I call stdio and write my own implementation of _write function using UART peripheral. So when I want to use printf in another library. I add include "dev_serial.h" and then is possible to use it.

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However I am trying to make the same thing in iar. First of all, I now that iar use fputc instead of _write. So, I follow the example UART printf stm32g0cb and then call dev_serial.h​ but printf is not showing nothing in UART port. Also I activate in iar option the full option for printf. But I continue without see nothing in UART port.

[JCuna.1]

I already tested the UART implementation used in fputc function, and this work​.