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Altera_Forum's avatar
Altera_Forum
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16 years ago

SDRAM Read and write address control

Dear Friends, i am trying to write and read data in SDRAM. but while writing and reading i don't have any control over address where i perform my read/write operation. i am using following ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

This is expected, since you are always writing to the same address.

The macro you use is for a PIO. To read/write any location, you can use: 

IOWR(SDRAM_BASE+address,my_data)
IORD(SDRAM_BASE+address)

Use address=0 to write at the first location, and remember that it is a byte based address, i.e. use address=4 to access the second 32-bit location, 8 for the third one, etc...