Some news. I have uploaded a simple example at https://hilbert.systella.fr/public/test_uecc.tar.gz
This tarball contains minimal code to trigger this issue, makefile and two asmb output : - ok.asm - ko.asm ok.asm runs as expected and was built with #define uECC_PLATFORM uECC_arch_other in uECC.h. ko.asm doesn't run as expected and was built with #define uECC_PLATFORM uECC_avr Help will be welcome... Best regards, JB