The test program in progs-or32/logger-test.c defines a memory mapped volatile data structure and then writes to and reads from each element of that structure.

The source code for the logger test program may be found in progs-or32/logger-test.c in the distribution. It uses the utility functions (progs-or32/utils.c and progs-or32/utils.h) and the bootloader (progs-or32/start.s).