a_dpfifo_8t21.tdf

verilog代码读写SDRAM 不带仿真

--a_dpfifo ALLOW_RWCYCLE_WHEN_FULL="OFF" DEVICE_FAMILY="Cyclone II" LPM_NUMWORDS=64 LPM_SHOWAHEAD="OFF" lpm_width=8 lpm_widthu=6 OVERFLOW_CHECKING="OFF" UNDERFLOW_CHECKING="OFF" aclr clock data empty full q rreq sclr usedw wreq CARRY_CHAIN="MANUAL" CARRY_CHAIN_LENGTH=48 CYCLONEII_M4K_COMPATIBILITY="ON" LOW_POWER_MODE="AUTO" lpm_hint="RAM_BLOCK_TYPE=AUTO" RAM_BLOCK_TYPE="AUTO"
--VERSION_BEGIN 7.2SP2 cbx_altdpram 2007:04:25:14:55:30:SJ cbx_altsyncram 2007:08:27:07:35:30:SJ cbx_cycloneii 2007:06:13:15:47:32:SJ cbx_fifo_common 2007:04:09:14:30:26:SJ cbx_lpm_add_sub 2007:08:06:16:01:34:SJ cbx_lpm_compare 2007:06:21:15:54:06:SJ cbx_lpm_counter 2007:08:07:01:40:08:SJ cbx_lpm_decode 2007:03:12:19:01:52:SJ cbx_lpm_mux 2007:05:11:14:07:38:SJ cbx_mgl 2007:08:03:15:48:12:SJ cbx_scfifo 2007:04:06:15:45:12:SJ cbx_stratix 2007:10:18:20:36:46:SJ cbx_stratixii 2007:10:19:15:30:42:SJ cbx_stratixiii 2007:06:28:17:15:56:SJ cbx_util_mgl 2007:11:07:17:40:20:SJ  VERSION_END


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FUNCTION a_fefifo_7cf (aclr, clock, rreq, sclr, wreq)
RETURNS ( empty, full, usedw_out[5..0]);
FUNCTION dpram_5h21 (data[7..0], inclock, outclock, outclocken, rdaddress[5..0], wraddress[5..0], wren)
RETURNS ( q[7..0]);
FUNCTION cntr_fjb (aclr, clock, cnt_en, sclr)
RETURNS ( q[5..0]);

--synthesis_resources = lut 18 M4K 1 reg 20 
SUBDESIGN a_dpfifo_8t21
( 
	aclr	:	input;
	clock	:	input;
	data[7..0]	:	input;
	empty	:	output;
	full	:	output;
	q[7..0]	:	output;
	rreq	:	input;
	sclr	:	input;
	usedw[5..0]	:	output;
	wreq	:	input;
) 
VARIABLE 
	fifo_state : a_fefifo_7cf;
	FIFOram : dpram_5h21;
	rd_ptr_count : cntr_fjb;
	wr_ptr : cntr_fjb;
	rd_ptr[5..0]	: WIRE;
	valid_rreq	: WIRE;
	valid_wreq	: WIRE;

BEGIN 
	fifo_state.aclr = aclr;
	fifo_state.clock = clock;
	fifo_state.rreq = rreq;
	fifo_state.sclr = sclr;
	fifo_state.wreq = wreq;
	FIFOram.data[] = data[];
	FIFOram.inclock = clock;
	FIFOram.outclock = clock;
	FIFOram.outclocken = (valid_rreq # sclr);
	FIFOram.rdaddress[] = ((! sclr) & rd_ptr[]);
	FIFOram.wraddress[] = wr_ptr.q[];
	FIFOram.wren = valid_wreq;
	rd_ptr_count.aclr = aclr;
	rd_ptr_count.clock = clock;
	rd_ptr_count.cnt_en = valid_rreq;
	rd_ptr_count.sclr = sclr;
	wr_ptr.aclr = aclr;
	wr_ptr.clock = clock;
	wr_ptr.cnt_en = valid_wreq;
	wr_ptr.sclr = sclr;
	empty = fifo_state.empty;
	full = fifo_state.full;
	q[] = FIFOram.q[];
	rd_ptr[] = rd_ptr_count.q[];
	usedw[] = fifo_state.usedw_out[];
	valid_rreq = rreq;
	valid_wreq = wreq;
END;
--VALID FILE