read/write in bram block

Hi all, i am designing a system in which we have a bram block,microblaze processor and other essential component. i have written a verilog code for bram controller (successfully compiled)to interface bram block to opb i have to write a c code to perform read write operation in bram block.i have written following code

#include #include #include int main(){ printf("Hello this is the start, printing using print\n"); volatile char *pointer = ( volatile char *) 0x10013405; *pointer = 'c'; char temp = *pointer; printf("%c %c\n",temp , *pointer); return 0 ; }

which is not working so regarding this i have following question

1-in c ,is it possible to assign address to a pointer according to us ???? 2-is it necessary to use gpio function to read write operation in a peripheral ??

if you find some conceptual mistake in code then please reply

with regards Ajay

Reply to
Loading thread data ...

You shouldn't need a cast here and both volatile keywords add nothing additional in this context and could hide errors. You should also look into xil_printf()'s.

But, you never said what the output of the printf() actually was.

Yes, it's valid but not because of C, but because you are using a flat non-managed memory model. Try this kind of shenanigans in Windows and you most likely will get a SEG Fault.

You could write your own.

Reply to
Matthew Hicks

Could it be the IP core you wrote? Why write custom BRAM interface controller when one already comes with EDK (opb_bram_if_cntlr)? Alternatively, if you have no other masters that need access to the BRAM other than the Microblaze, you might want to consider interfacing via the LMB through the lmb_bram_if_cntlr. This approach has better performance since the single-master nature of the LMB requires no arbitration.

Reply to

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.