added spi pcf

Author: perigoso

firmware/Makefile

@@ -14,7 +14,7 @@ SOURCEDIR = src
 # u4k	set device type to iCE5LP4K
 DEVICE = lp384
 PACKAGE = SG32
-TOPVFILE = top
+TOPMODULE = top
 
 # Sources
 SRCFILES := $(addsuffix /*, $(SOURCEDIR))
@@ -33,11 +33,11 @@ synthesize: make-dir $(TARGETBIN)
 
 $(TARGETBLIF): $(VSOURCES)
 	@echo Synthesizing blif file...
-	@yosys -q -p "synth_ice40 -top $(TOPVFILE) -asc $@" $(VSOURCES)
+	@yosys -q -p "synth_ice40 -top $(TOPMODULE) -asc $@" $(VSOURCES)
 
 $(TARGETJSON): $(VSOURCES)
 	@echo Synthesizing json file...
-	@yosys -q -p "synth_ice40 -top $(TOPVFILE) -json $@" $(VSOURCES)
+	@yosys -q -p "synth_ice40 -top $(TOPMODULE) -json $@" $(VSOURCES)
 
 $(TARGETASC): $(TARGETJSON) $(PCFILE)
 	@echo Runing place and route...
@@ -61,7 +61,7 @@ erase:
 
 timing: $(TARGETASC)
 	@echo Running timing analysis tool...
-	@icetime -tmd $(DEVICE) -r $(TARGETDIR)/$@.txt $<
+	@icetime -tmd $(DEVICE) -r $(TARGETDIR)/$(TARGET_NAME)-timing.txt $<
 
 make-dir:
 	@mkdir -p $(TARGETDIR)

firmware/src/constraints.pcf

@@ -1,2 +1,45 @@
-set_io clk_25mhz 2
-set_io led 1
+###############################################################################
+#
+# icy-gecko constraint file (.pcf)
+# SG32 package
+#
+###############################################################################
+
+####
+# icy-gecko information: https://github.com/
+####
+
+# BANK 3
+#set_io --warn-no-port IOL_2A 2
+#set_io --warn-no-port IOL_2B 1 # LED
+#set_io --warn-no-port IOL_4A 5
+#set_io --warn-no-port IOL_4B_GBIN7 6
+#set_io --warn-no-port IOL_5A_GBIN6 8
+#set_io --warn-no-port IOL_5B 7
+
+# BANK 1
+#set_io --warn-no-port IOR_34 18
+#set_io --warn-no-port IOR_35_GBIN3 19
+#set_io --warn-no-port IOR_36_GBIN2 20
+#set_io --warn-no-port IOR_38 22
+#set_io --warn-no-port IOR_39 23
+
+# BANK 0
+#set_io --warn-no-port IOT_45 26
+#set_io --warn-no-port IOT_47 27
+#set_io --warn-no-port IOT_49_GBIN0 29
+#set_io --warn-no-port IOT_50_GBIN1 30  # CLK_25MHZ
+#set_io --warn-no-port IOT_52 32
+#set_io --warn-no-port IOT_53 31
+
+# SPI
+#set_io --warn-no-port IOB_24_SDO 12
+#set_io --warn-no-port IOB_25_SDI 13
+#set_io --warn-no-port IOB_26_SCK 15
+#set_io --warn-no-port IOB_27_SS 14
+
+# LED
+set_io --warn-no-port LED 1
+
+# 25MHz clock
+set_io --warn-no-port CLK_25MHZ 30 # input

firmware/src/ice40-dev.v

@@ -0,0 +1,7 @@
+module top(input CLK_25MHZ, output LED);
+
+reg [23:0] counter = 0;
+assign LED = counter[23];
+always @(posedge CLK_25MHZ) counter <= counter + 1;
+
+endmodule