Added iCEZUM example

examples/icezum/.gitignore

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+example.bin
+example.blif
+example.asc
+example.rpt

examples/icezum/Makefile

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+PROJ = example
+PIN_DEF = icezum.pcf
+DEVICE = hx1k
+
+all: $(PROJ).rpt $(PROJ).bin
+
+%.blif: %.v
+	yosys -p 'synth_ice40 -top top -blif $@' $<
+
+%.asc: $(PIN_DEF) %.blif
+	arachne-pnr -d $(subst hx,,$(subst lp,,$(DEVICE))) -o $@ -p $^
+
+%.bin: %.asc
+	icepack $< $@
+
+%.rpt: %.asc
+	icetime -d $(DEVICE) -mtr $@ $<
+
+prog: $(PROJ).bin
+	iceprog $<
+
+sudo-prog: $(PROJ).bin
+	@echo 'Executing prog as root!!!'
+	sudo iceprog $<
+
+clean:
+	rm -f $(PROJ).blif $(PROJ).asc $(PROJ).rpt $(PROJ).bin
+
+.SECONDARY:
+.PHONY: all prog clean

examples/icezum/example.v

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+module top (
+	input  clk,
+	output LED0,
+	output LED1,
+	output LED2,
+	output LED3,
+	output LED4,
+	output LED5,
+	output LED6,
+	output LED7
+);
+
+	localparam BITS = 3;
+	localparam LOG2DELAY = 20;
+
+	reg [BITS+LOG2DELAY-1:0] counter = 0;
+	reg [BITS-1:0] outcnt;
+
+	always@(posedge clk) begin
+		counter <= counter + 1;
+		outcnt <= counter >> LOG2DELAY;
+	end
+
+	assign {LED7, LED6, LED5, LED4, LED3, LED2, LED1, LED0} = 1 << outcnt;
+endmodule

examples/icezum/icezum.pcf

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+set_io LED0 95
+set_io LED1 96
+set_io LED2 97
+set_io LED3 98
+set_io LED4 99
+set_io LED5 101
+set_io LED6 102
+set_io LED7 104
+set_io clk 21