topic Re: fopen() and fprintf() with Semihosting on Kinetis K10 in Kinetis Microcontrollers

fopen() and fprintf() with Semihosting on Kinetis K10

peterkrause — Fri, 24 Oct 2014 07:47:36 GMT

Hello,

I want to do some automated unit testing of my firmware modules. I'm using Sput Unit Testing Framework and want to save the results in a text file via Semihosting. For this purpose I need fopen() and fprintf() to open a file and write text to it. At the moment I'm able to output my reults to the console via printf (I changed all fprintf() to printf() in Sput Framework). But I was not able to get working fopen() and fprintf(). In the EWL C reference manual is a chapter about the configuration of the library. I set "_EWL_OS_DISK_FILE_SUPPORT" macro to "1" in the "ansi_prefix.ARM.h" header file to enable supoort of the functions, but it didn't work.

How can I enable the file support?

My setup:

Kinetis MK10DX256VLH7

Segger J-Link Debugger

CodeWarrior 10.6

Windows 7 64-Bit

Re: fopen() and fprintf() with Semihosting on Kinetis K10

peterkrause — Tue, 28 Oct 2014 13:36:09 GMT

Is there no one with an idea?

Re: fopen() and fprintf() with Semihosting on Kinetis K10

Rick_Li — Wed, 29 Oct 2014 07:32:40 GMT

to enable the file support, an OS and a filesystem is needed first.

if you do not use OS such like MQX in your application, then, a file name and his path can not be resolved and fopen can not recognize it.

regarding your case, even if Marco "_EWL_OS_DISK_FILE_SUPPORT" is enable, you can't use fopen this feature in your application.

Re: fopen() and fprintf() with Semihosting on Kinetis K10

peterkrause — Wed, 29 Oct 2014 07:44:17 GMT

OK, thanks for your answer. With this info I'm not able to enable the file support, but I know the problem now.

At the moment I send my results to the console via printf() and save the console in a text file using the retarget option in the debugger.