Requesting for an Actel library

[irfan.mohammed]

Hi ,

I am a student in T.U Braunschweig (in Germany). I am new in VHDL and
want to implement a project. I am working on VHDL with Actel Libero.
In my previous implementation, I have used the "RAMB4_S1_S1"(4K-Bit
Data Dual Port Block RAM) and "RAMB4_S1"(4K-Bit Data Single Port Block
RAM) which are implemented in the "UNISIM" in Xilinx.
Could you please provide me with the information of an equivalent
library that implement these RAMs in Actel Libero ?

Thanks in advance

Best regards
Adamou

 

[D Stanford]

Could you please provide me with the information of an equivalent
library that implement these RAMs in Actel Libero ?

You'd probably be better off doing a behavioral design of the RAM so
that switching target FPGAs does not break things again.

 

[Jeremy Ralph]

Creating technology independent, behavioural RAM models as Stanford
suggested is a good idea.

Another good practice is to create generic RAM wrappers which share a
common entity declaration. Then you can have different architectures
for behavioural modelling and specific library technologies. You can
use VHDL configuration files to select the architecture without having
to change existing code. Thus, if you were to switch to a different
FPGA or library vendor all you need to do is create an architecture
that wraps that vendor's RAM instance and glues it to your generic
RAM interface.

Unfortunately I can't provide you with any info on Actel Libero RAMs as
I don't know much about that.

Hope this helps,
Jeremy

PS Braunschweig is a nice town -- I was there once on a work assignment
(for a large US company which has a site there), coding Verilog though
rather than VHDL.

 

[Thomas Stanka]

Hi,

I am a student in T.U Braunschweig (in Germany). I am new in VHDL and
want to implement a project. I am working on VHDL with Actel Libero.
In my previous implementation, I have used the "RAMB4_S1_S1"(4K-Bit
Data Dual Port Block RAM) and "RAMB4_S1"(4K-Bit Data Single Port Block
RAM) which are implemented in the "UNISIM" in Xilinx.
Could you please provide me with the information of an equivalent
library that implement these RAMs in Actel Libero ?

Actgen is the name of the actel core generator, just use the generated
core. A second way would be a look in your libray macro cell
documentation.

bye Thomas