cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 
Highlighted
Scholar
Scholar
2,583 Views
Registered: ‎05-31-2012

Same time to write to DDR or to BRAM from Microblaze?

i'm trying to speed up microblaze write operations to do some graphics

I attached a BRAM to the AXI interconnect and a DDR memory controller.

Writing to the DDR or the BRAM takes the same time, is it normal?

I thought that writing in the BRAM was much faster!

0 Kudos
2 Replies
Highlighted
Anonymous
Not applicable
2,573 Views

How are you measuring this. You can estimate the expected latency from the DDR data sheet. The BRAM should take only a few ticks
0 Kudos
Scholar
Scholar
2,560 Views
Registered: ‎05-31-2012

in a c program, i use a for cycle to initialize some memory locations, with a timer i measure the time to get the for cycle completed

 

I have to draw text strings, i thought that if i put the font in the BRAM the write process was much faster, but it wasn't

 

i need a way to draw graphics much faster!

to delete it i use a CDMA that blanks all the graphic memory buffer and it's ok

0 Kudos