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Altera_Forum's avatar
Altera_Forum
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16 years ago

Interface to dual port ram memory

Hi, I want to access (read/write) dual port ram in my sopc system. How could I do that in my Nios II program? Thanks, Caridee
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Through the IOWR macro: 

IOWR(YOUR_DPRAM_BASE,reg,value)

Where reg is the 32-bit register number (reg = 0 will write at YOUR_DPRAM_BASE, reg = 1 will write at YOUR_DPRAM_BASE+4, etc...) and value is the 32-bit value to write.

Using pointers: 

int *myPointer = (int*)alt_remap_uncached(YOUR_DPRAM_BASE,YOUR_DPRAM_SPAN);
myPointer = value1;
myPointer = value2;

etc...