FPGA Central

Hello, I know many will say this is not an appropriate group to post
such a question, but I wasn't getting any response on the Verilog
group, so please let me apologize. I am new to Verilog and need some
help instantiating a lpm dcfifo in my code. Here is what I have so
far:

FIFIN : lpm_fifo_dc WITH (LPM_WIDTH = 64, LPM_NUMWORDS = 64,
LPM_WIDTHU = 9, RDSYNC_DELAYPIPE = 3, WRSYNC_DELAYPIPE = 3);

FIFIN.aclr = (!rstn);
FIFIN.wrclock = (clk);
FIFIN.wrreq = (wr_fiforeq);
FIFIN.data[31..0] = (dma_wrdata);
FIFIN.rdclock = (clk);
FIFIN.rdreq = (dma1_rddata);
FIFIN.q = (rd_fiforeq);


If anyone has some examples of instantiating a lpm function within
Verilog I would greatly appreciate your help.

Thanks,
joe

On May 20, 10:02 am, "jjlind...@hotmail.com" <jjlind...@hotmail.com>
wrote:
> Hello, I know many will say this is not an appropriate group to post
> such a question, but I wasn't getting any response on the Verilog
> group, so please let me apologize. I am new to Verilog and need some
> help instantiating a lpm dcfifo in my code. Here is what I have so
> far:
>
> FIFIN : lpm_fifo_dc WITH (LPM_WIDTH = 64, LPM_NUMWORDS = 64,
> LPM_WIDTHU = 9, RDSYNC_DELAYPIPE = 3, WRSYNC_DELAYPIPE = 3);
>
> FIFIN.aclr = (!rstn);
> FIFIN.wrclock = (clk);
> FIFIN.wrreq = (wr_fiforeq);
> FIFIN.data[31..0] = (dma_wrdata);
> FIFIN.rdclock = (clk);
> FIFIN.rdreq = (dma1_rddata);
> FIFIN.q = (rd_fiforeq);
>
> If anyone has some examples of instantiating a lpm function within
> Verilog I would greatly appreciate your help.
>
> Thanks,
> joe

Hello, I believe this works:

dcfifo # (
.intended_device_family ( "Stratix II GX"),
.lpm_hint ( "MAXIMIZE_SPEED=5,"),
.lpm_numwords ( 64),
.lpm_showahead ( "OFF"),
.lpm_type ( "dcfifo"),
.lpm_width ( 64),
.lpm_widthu ( 6),
.overflow_checking ( "ON"),
.rdsync_delaypipe ( 4),
.underflow_checking ( "ON"),
.use_eab ( "ON"),
.write_aclr_synch ( "OFF"),
.wrsync_delaypipe ( 4)
)

dcfifo_component (
.wrclk (wrclk),
.rdreq (rdreq),
.aclr (aclr),
.rdclk (rdclk),
.wrreq (wrreq),
.data (data),
.wrusedw (sub_wire0),
.q (sub_wire1),
.rdusedw (sub_wire2)
// synopsys translate_off
,
.rdempty (),
.rdfull (),
.wrempty (),
.wrfull ()
// synopsys translate_on
);