1.- Write into m25p32 SR works: we are able to protect SPI memory space.
2.-  Starting to work in the Write Page test. Good synchronization between m25p32 controller, double buffer and SPI. Needs to load some data and check agains the serializer RX.
3.- Extra test: when an access over the SPI interface in being performed, the core doesn't allow to reconfigure the FMOH register, responsible of changing the fsm of the m25p32 controller.

General: big cleanup of the code. Everything is commented. Code size smaller.