a_graycounter_d2c.tdf

sdram读写

--a_graycounter DEVICE_FAMILY="Cyclone II" PVALUE=1 WIDTH=10 clock cnt_en q ALTERA_INTERNAL_OPTIONS=suppress_da_rule_internal=s102
--VERSION_BEGIN 9.1 cbx_a_gray2bin 2009:10:21:21:22:16:SJ cbx_a_graycounter 2009:10:21:21:22:16:SJ cbx_cycloneii 2009:10:21:21:22:16:SJ cbx_mgl 2009:10:21:21:37:49:SJ cbx_stratix 2009:10:21:21:22:16:SJ cbx_stratixii 2009:10:21:21:22:16:SJ  VERSION_END


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--  without limitation, that your use is for the sole purpose of 
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--synthesis_resources = reg 14 
OPTIONS ALTERA_INTERNAL_OPTION = "suppress_da_rule_internal=s102;{-to counter8a0} POWER_UP_LEVEL=HIGH;{-to parity9} POWER_UP_LEVEL=HIGH";

SUBDESIGN a_graycounter_d2c
( 
	clock	:	input;
	cnt_en	:	input;
	q[9..0]	:	output;
) 
VARIABLE 
	counter8a0 : dffeas
		WITH (
			power_up = "high"
		);
	counter8a1 : dffeas;
	counter8a2 : dffeas;
	counter8a3 : dffeas;
	counter8a4 : dffeas;
	counter8a5 : dffeas;
	counter8a6 : dffeas;
	counter8a7 : dffeas;
	counter8a8 : dffeas;
	counter8a9 : dffeas;
	parity9 : dffeas
		WITH (
			power_up = "high"
		);
	sub_parity10a[2..0] : dffeas;
	cntr_cout[9..0]	: WIRE;
	parity_cout	: WIRE;
	sclr	: NODE;
	updown	: NODE;

BEGIN 
	counter8a[9..0].clk = clock;
	counter8a[9..0].d = ( (counter8a[9].q $ cntr_cout[8..8]), (counter8a[8].q $ (counter8a[7].q & cntr_cout[7..7])), (counter8a[7].q $ (counter8a[6].q & cntr_cout[6..6])), (counter8a[6].q $ (counter8a[5].q & cntr_cout[5..5])), (counter8a[5].q $ (counter8a[4].q & cntr_cout[4..4])), (counter8a[4].q $ (counter8a[3].q & cntr_cout[3..3])), (counter8a[3].q $ (counter8a[2].q & cntr_cout[2..2])), (counter8a[2].q $ (counter8a[1].q & cntr_cout[1..1])), (counter8a[1].q $ (counter8a[0].q & cntr_cout[0..0])), ((cnt_en & (counter8a[0].q $ (! parity_cout))) # ((! cnt_en) & counter8a[0].q)));
	counter8a[9..0].sclr = sclr;
	parity9.clk = clock;
	parity9.d = ((cnt_en & ((sub_parity10a[0..0].q $ sub_parity10a[1..1].q) $ sub_parity10a[2..2].q)) # ((! cnt_en) & parity9.q));
	parity9.sclr = sclr;
	sub_parity10a[].clk = ( clock, clock, clock);
	sub_parity10a[].d = ( ((cnt_en & (counter8a[8..8].q $ counter8a[9..9].q)) # ((! cnt_en) & sub_parity10a[2].q)), ((cnt_en & (((counter8a[4..4].q $ counter8a[5..5].q) $ counter8a[6..6].q) $ counter8a[7..7].q)) # ((! cnt_en) & sub_parity10a[1].q)), ((cnt_en & (((counter8a[0..0].q $ counter8a[1..1].q) $ counter8a[2..2].q) $ counter8a[3..3].q)) # ((! cnt_en) & sub_parity10a[0].q)));
	sub_parity10a[].sclr = ( sclr, sclr, sclr);
	cntr_cout[] = ( B"0", (cntr_cout[7..7] & (! counter8a[7].q)), (cntr_cout[6..6] & (! counter8a[6].q)), (cntr_cout[5..5] & (! counter8a[5].q)), (cntr_cout[4..4] & (! counter8a[4].q)), (cntr_cout[3..3] & (! counter8a[3].q)), (cntr_cout[2..2] & (! counter8a[2].q)), (cntr_cout[1..1] & (! counter8a[1].q)), (cntr_cout[0..0] & (! counter8a[0].q)), (cnt_en & parity_cout));
	parity_cout = (((! parity9.q) $ updown) & cnt_en);
	q[] = counter8a[9..0].q;
	sclr = GND;
	updown = VCC;
END;
--VALID FILE