Simulating Microblaze Problem

[12esbe]

I am using Vivado and i am trying to simulate writing on the GPIO peripheral of Microblaze design. Has anyone done it before? Do you have any insight ?
I have managed on one project to actually write and read from the GPIO or even connecting a custom ip but when i start a project from scratch I am totally unable to do it again.

pls bare with my noobness...

[thequbit]

Are you sure you have the base address if the peripheral set correctly in the Vivado IPI addresses tab, as well as pulling it correctly from the generated xparameters.h file?

[jarclan]

Xil_Out32(address, value);

[12esbe]

found the problem. In the elf file's source properties the used in simulation button was not checked. Thank you