--- /dev/null
+TARGET = POSLink
+VLOGS = POSLink.v
+VLOGS_ALL = $(VLOGS)
+
+all: fpga_target
+
+scancodes.unshifted.hex: scancodes.txt
+ cut -f3 -d, scancodes.txt > scancodes.unshifted.hex
+
+scancodes.shifted.hex: scancodes.txt
+ cut -f4 -d, scancodes.txt > scancodes.shifted.hex
+
+BITGEN_OPTS = \
+ -w \
+ -g DebugBitstream:No \
+ -g Binary:no \
+ -g CRC:Enable \
+ -g ConfigRate:1 \
+ -g ProgPin:PullUp \
+ -g DonePin:PullUp \
+ -g TckPin:PullUp \
+ -g TdiPin:PullUp \
+ -g TdoPin:PullUp \
+ -g TmsPin:PullUp \
+ -g UnusedPin:PullDown \
+ -g UserID:0xFFFFFFFF \
+ -g DCMShutdown:Disable \
+ -g StartUpClk:CClk \
+ -g DONE_cycle:4 \
+ -g GTS_cycle:5 \
+ -g GWE_cycle:6 \
+ -g LCK_cycle:NoWait \
+ -g Security:None \
+ -g DonePipe:No \
+ -g DriveDone:No
+
+fpga_target: $(TARGET).svf
+
+$(TARGET).ngc: $(TARGET).xst $(VLOGS_ALL)
+ @mkdir -p xst/projnav.tmp
+ @echo work > $(TARGET).lso
+ @rm -f $(TARGET).prj
+ @for i in $(VLOGS); do echo verilog work '"'$$i'"' >> $(TARGET).prj; done
+ xst -ifn $(TARGET).xst -ofn $(TARGET).syr
+
+$(TARGET).ngd: $(TARGET).ngc $(TARGET).ucf
+ ngdbuild -dd _ngo -uc $(TARGET).ucf -nt timestamp -p xc3s1200e-fg320-5 "$(TARGET).ngc" $(TARGET).ngd
+
+$(TARGET)_map.ncd: $(TARGET).ngd
+ map -p xc3s1200e-fg320-5 -cm area -pr off -k 4 -c 100 -o $(TARGET)_map.ncd $(TARGET).ngd $(TARGET).pcf
+
+$(TARGET).ncd: $(TARGET)_map.ncd
+ par -w -ol std -t 1 $(TARGET)_map.ncd $(TARGET).ncd $(TARGET).pcf
+
+$(TARGET).twr: $(TARGET)_map.ncd
+ trce -e 3 -s 5 -xml $(TARGET) $(TARGET).ncd -o $(TARGET).twr $(TARGET).pcf -ucf $(TARGET).ucf
+
+$(TARGET).bit: $(TARGET).ncd
+ bitgen $(BITGEN_OPTS) $(TARGET).ncd
+
+$(TARGET).svf: $(TARGET).bit impact.cmd
+ sed -e s/XXX/$(subst .bit,,$<)/ < impact.cmd > tmp.cmd
+ impact -batch tmp.cmd
+
+clean:
+ rm -f $(TARGET).bgn $(TARGET).ngc $(TARGET).svf $(TARGET).ngd $(TARGET).bit $(TARGET).twr $(TARGET).ncd $(TARGET)_map.ncd $(TARGET)_map.*
+ rm -f $(TARGET).bld $(TARGET).drc $(TARGET)_ngdbuild.xrpt $(TARGET)_pad.* $(TARGET).pad $(TARGET).par $(TARGET)_par.xrpt $(TARGET).ngr
+ rm -f $(TARGET).pcf $(TARGET)_summary.xml $(TARGET).unroutes $(TARGET)_usage.xml $(TARGET)_xst.xrpt $(TARGET).syr $(TARGET).ptwx $(TARGET).xpi
+ rm -rf xst
+ rm -rf xlnx_auto_*
+ rm -rf _ngo
+ rm -f tmp.cmd
+ rm -f _impactbatch.log
+ rm -f $(TARGET).prj
+ rm -f $(TARGET).lso
+
--- /dev/null
+NET "xtal" LOC="b8";
+
+NET "tos_inputs_e2<0>" LOC="H16";
+NET "tos_inputs_e2<1>" LOC="G13";
+NET "tos_inputs_e2<2>" LOC="J16";
+NET "tos_output" LOC="G15";
+NET "leds<0>" LOC="J14";
+NET "leds<1>" LOC="J15";
+NET "leds<2>" LOC="K15";
+NET "leds<3>" LOC="K14";
+NET "sw<0>" LOC="G18";
+NET "sw<1>" LOC="H18";
+NET "sw<2>" LOC="K18";
+NET "sw<3>" LOC="K17";
--- /dev/null
+module POSLink(
+ input xtal,
+ input [2:0] tos_inputs_e2,
+ input [3:0] sw,
+ output reg [3:0] leds,
+ output reg tos_output);
+
+ reg [2:0] tos_inputs_e;
+ reg [2:0] tos_inputs;
+ wire [2:0] tos_good;
+
+ always @(posedge xtal) begin
+ tos_inputs_e <= tos_inputs_e2;
+ tos_inputs <= tos_inputs_e;
+ end
+
+ /* 100ns -> 1000ns */
+
+ always @(*) begin
+ leds[3:0] = 4'h0;
+
+ if (sw[2] || (tos_good[2] && ~sw[1] && ~sw[0])) begin
+ tos_output = tos_inputs[2];
+ leds[2] = 1;
+ end else if (sw[1] | (tos_good[1] && ~sw[0])) begin
+ tos_output = tos_inputs[1];
+ leds[1] = 1;
+ end else if (sw[0] | tos_good[0]) begin
+ tos_output = tos_inputs[0];
+ leds[0] = 1;
+ end else
+ tos_output = sw[3];
+ leds[3] = tos_output;
+ end
+
+ TOS_Detect detect[2:0](.xtal(xtal), .tos_input(tos_inputs), .tos_good(tos_good));
+endmodule
+
+/* xtal: 50MHz (==20ns)
+ * Minimum: 100ns (we'll allow 60ns for good measure)
+ * 5 cycles (we'll allow 3 for good measure)
+ * Maximum: 1000ns (we'll allow 1200ns for good measure)
+ * 50 cycles (we'll allow 60 for good measure)
+ */
+module TOS_Detect(
+ input xtal,
+ input tos_input,
+ output reg tos_good = 0);
+
+ reg tos_input_1a = 0;
+ always @(posedge xtal)
+ tos_input_1a <= tos_input;
+ wire transition = tos_input ^ tos_input_1a;
+
+ reg [5:0] lasttx = 0;
+ always @(posedge xtal) begin
+ if (transition) begin
+ if (lasttx < 3) /* Too soon! */
+ tos_good <= 0;
+ else if (lasttx > 60) /* Too late! */
+ tos_good <= 0;
+ else /* OK by me. */
+ tos_good <= 1;
+ lasttx <= 0;
+ end else begin
+ if (lasttx != 63)
+ lasttx <= lasttx + 1;
+ else
+ tos_good <= 0;
+ end
+ end
+endmodule
--- /dev/null
+set -tmpdir "xst/projnav.tmp"
+set -xsthdpdir "xst"
+run
+-ifn POSLink.prj
+-ifmt mixed
+-ofn POSLink
+-ofmt NGC
+-p xc3s500e-5-fg320
+-top POSLink
+-opt_mode Speed
+-opt_level 1
+-iuc NO
+-lso POSLink.lso
+-keep_hierarchy NO
+-netlist_hierarchy as_optimized
+-rtlview Yes
+-glob_opt AllClockNets
+-read_cores YES
+-write_timing_constraints NO
+-cross_clock_analysis NO
+-hierarchy_separator /
+-bus_delimiter <>
+-case maintain
+-slice_utilization_ratio 100
+-bram_utilization_ratio 100
+-verilog2001 YES
+-fsm_extract YES -fsm_encoding Auto
+-safe_implementation No
+-fsm_style lut
+-ram_extract Yes
+-ram_style Auto
+-rom_extract Yes
+-mux_style Auto
+-decoder_extract YES
+-priority_extract YES
+-shreg_extract YES
+-shift_extract YES
+-xor_collapse YES
+-rom_style Auto
+-auto_bram_packing NO
+-mux_extract YES
+-resource_sharing YES
+-async_to_sync NO
+-mult_style auto
+-iobuf YES
+-max_fanout 500
+-bufg 24
+-register_duplication YES
+-register_balancing No
+-slice_packing YES
+-optimize_primitives NO
+-use_clock_enable Yes
+-use_sync_set Yes
+-use_sync_reset Yes
+-iob auto
+-equivalent_register_removal YES
+-slice_utilization_ratio_maxmargin 5
--- /dev/null
+setMode -bs
+setCable -port svf -file "XXX.svf"
+addDevice -p 1 -file "XXX.bit"
+addDevice -p 2 -part xcf04s
+Program -p 1 -defaultVersion 0
+quit
+
git.joshuawise.com / poslink.git / commitdiff