This is procedure how to build wolfssl and test project on Renesas e2studio. wolfssl: Build wolfssl.lib test: Get missing files - create DUMMY project - copy generate directory of DUMMY project under src directory of test project - uncomment "Use SIM I/O" lines in resetprg.c - set heap size in sbrk.h - set stack size in stacksct.h - replace lowlvl.src with sample project's lowlvl.src which you can download below. https://www.renesas.com/jp/ja/software/D3012028.html * copy lowlvl.c and lowlvl.h in sample project's above into src directory of test project too. Build test wolfCrypt Setting MPU: R5F565MLCxFC or R5F571MLDxFC