Semihosting Error (L6915E)

Hi all!

I am looking to read from a file within Keil µVision (v5.22.0.0). To be more specific, I just have a function which loops through said file with fgetc( ) (it can actually just be reproduced with one call to fgetc( ) in the start of main( )). However, I am met with the following compiler error:

Error: L6915E: Library reports error: __use_no_semihosting_swi was requested, but a semihosting fgetc was linked in

I have read through this post as well as other similar posts with the same error, but I could not get much from there. I have also gone through these (this, that, and this) pages in the support guide, too. From those pages, I think I have a better understanding of what is going on and what needs to be done. Essentially, (please correct me if I'm wrong!) fgetc( ) is a semihosting function and it is contradicting with the __use_no_semihosting_swi macro being imported.

From the support guide pages referred above, it looks like I would need to retarget the call to fgetc( ) to my own implementation of it in Retarget.c. The problem is, I am not sure how to write my own implementation of fgetc( ) without using fgetc( ), or any of the other semihosting functions for that matter (fgets( ), scanf( ), etc.).

Here are some other tidbits that may (or may not) be helpful:

• The said file from the beginning is in the same directory where the code is to read that file.
• The C compiler, as well as the assembler, linker and other parts, are on v5.06 update 4 (build 422)
• The MDK-Lite version is 5.22

Any direction on this would be greatly appreciated!

Thank you,

- Dan