Compiling WIZ750SR on Linux

Question

Anyone compiling WIZ750SR on Linux? Or at least without Keil on Windows? A

winaw90106 · Answer

I made a makefile and compiled the "S2E_App". An unexpected result was that the binary file is 92kB while the binary file stored to the project file is about 60kB. I believe the project file was compiled using Keil 5. I do not see any debug options enabled. The gcc compiler/linker I used is 10.3 (also tried 4.9 which is the one mentioned on Wiznet documentation).

TheoIm · Answer

Hello, WIZ750SR firmware is officially supported only in the Keil µVision 5 environment. To obtain the same build output as the official firmware, you must use the Keil toolchain, which requires a valid Keil license. When compiling the S2E_App with GCC, it is normal for the resulting binary to be larger. Keil and GCC use very different optimization and linking strategies, so reproducing the ~60 kB Keil output exactly with GCC is practically very difficult. Thanks

winaw90106 · Answer

Looks like my port of 1.45 only works with bootloaders <= 1.29. According to a quick analysis it seems that 1.30+ bootloaders do not copy ISR vector area to 0x00 anymore. Just wondering how this is now done? Vectors are copied as part of the APP startup code or vector address is changed in the APP start procedure?

kbenyous · Answer

Hello. I have forked the WIZ750SR Github repository, and started implementing a port from ARM Keil to GCC. I use ARM-GNU-GCC and CMake, and it runs fine with VSCode in WSL. https://github.com/kbenyous/WIZ750SR/tree/feature/gcc_cmake Comments are welcomed, do not hesitate to open an issue.