working demo code for fpga board

5 files changed, 130 insertions, 0 deletions

diff --git a/src/evb-yosys-demo/ice40hx8k-evb/.gitignore b/src/evb-yosys-demo/ice40hx8k-evb/.gitignore
new file mode 100644
index 0000000..c1fa30b
--- /dev/null
+++ b/src/evb-yosys-demo/ice40hx8k-evb/.gitignore
@@ -0,0 +1,4 @@
+example.bin
+example.blif
+example.asc
+example.rpt
diff --git a/src/evb-yosys-demo/ice40hx8k-evb/Makefile b/src/evb-yosys-demo/ice40hx8k-evb/Makefile
new file mode 100644
index 0000000..1bb5bb0
--- /dev/null
+++ b/src/evb-yosys-demo/ice40hx8k-evb/Makefile
@@ -0,0 +1,49 @@
+PREFIX=../../..
+BINDIR=${PREFIX}/bin
+
+#PREBUILT=/root/projects/tim_ac3rf/prebuild/oss-cad-suite/
+#BINDIR=${PREBUILT}/libexec
+#LD_LIBRARY_PATH:="${PREBUILT}/lib:${LD_LIBRARY_PATH}"
+
+YOSYS=${BINDIR}/yosys
+NEXTPNR=${BINDIR}/nextpnr-ice40
+ICEPACK=${BINDIR}/icepack
+ICETIME=${BINDIR}/icetime
+FLASH=${BINDIR}/flash
+
+BUILDDIR  = ./build
+FPGA_TYPE = hx8k
+FPGA_PKG  = ct256
+PCF       = ice40hx8k-evb.pcf
+RMDIR     = rmdir
+
+# Targets
+example: $(BUILDDIR)/example.rpt $(BUILDDIR)/example.bin
+
+flash: $(BUILDDIR)/example.bin
+	${FLASH} $(BUILDDIR)/example.bin
+
+$(BUILDDIR)/%.json: %.v
+	@mkdir -p $(@D)
+	#LD_LIBRARY_PATH=${LD_LIBRARY_PATH}
+	${YOSYS} -ql $(subst .json,,$@).log -p 'synth_ice40 -abc9 -device u -top top -json $@' $<
+
+%.asc: %.json
+	${NEXTPNR} --${FPGA_TYPE} --package ${FPGA_PKG} --json $< --pcf ${PCF} --asc $@
+
+%.bin: %.asc
+	${ICEPACK} $< $@
+
+%.rpt: %.asc
+	${ICETIME} -d $(FPGA_TYPE) -mtr $@ $<
+
+all: example
+
+clean:
+	rm -f $(BUILDDIR)/*.asc $(BUILDDIR)/*.bin $(BUILDDIR)/*.rpt $(BUILDDIR)/*.log $(BUILDDIR)/*.json
+	$(RMDIR) $(BUILDDIR)
+
+# Uncomment this line if you want to keep the intermediate .json and .asc files
+# .PRECIOUS: $(BUILDDIR)/%.json %.asc
+
+.PHONY: all prog clean example
diff --git a/src/evb-yosys-demo/ice40hx8k-evb/README b/src/evb-yosys-demo/ice40hx8k-evb/README
new file mode 100644
index 0000000..8e2c1e0
--- /dev/null
+++ b/src/evb-yosys-demo/ice40hx8k-evb/README
@@ -0,0 +1,6 @@
+This example is for iCE40HX1K-EVB board 
+
+www.olimex.com/wiki/iCE40HX1K-EVB
+
+you need OLIMEXINO-32U4 set as programmer to program the board
+
diff --git a/src/evb-yosys-demo/ice40hx8k-evb/example.v b/src/evb-yosys-demo/ice40hx8k-evb/example.v
new file mode 100644
index 0000000..0aa36d9
--- /dev/null
+++ b/src/evb-yosys-demo/ice40hx8k-evb/example.v
@@ -0,0 +1,66 @@
+module top(						//top module

+	CLK,

+	BUT1,

+	BUT2,

+	LED1,

+	LED2

+);

+

+input			CLK;				//input 100Mhz clock

+input			BUT1;				//input signal from button 1

+input			BUT2;				//input signal from button 2

+output			LED1;				//output signal to LED1

+output			LED2;				//output signal to LED2

+

+reg			BUT1_r;				//register to keep button 1 state

+reg			BUT2_r;				//register to keep button 2 state

+reg			LED1_m0_r;			//LED1 value in mode = 0

+reg			LED2_m0_r;			//LED2 value in mode = 0

+reg			LED1_m1_r;			//LED1 value in mode = 1

+reg			LED2_m1_r;			//LED2 value in mode = 1

+reg		[14:0]	cntr;				// 15 bit counter for LED blink timing

+reg		[14:0]	rst_cnt=0;			// 15 bit counter for button debounce

+reg			mode=1;				//mode set to 1 initially

+reg		[11:0]	clk_div;			// 12 bit counter

+

+wire			clk_24KHz;			//signal with approx 24KHz clock

+wire			reset;				//used for button debounce

+

+assign reset = rst_cnt[14];				//reset signal is connected to bit15 of rst_cnt

+assign LED1 = mode ? LED1_m1_r : LED1_m0_r;		//multiplexer controlled by mode which connects LED1_m1_r or LED1_m0_r to LED1

+assign LED2 = mode ? LED2_m1_r : LED2_m0_r;		//multiplexer controlled by mode which connects LED2_m1_r or LED2_m0_r to LED2

+assign clk_24KHz = clk_div[11];				//100 000 000 Hz / 4096 = 24414 Hz

+

+always @ (posedge CLK) begin				//on each positive edge of 100Mhz clock increment clk_div

+	clk_div <= clk_div + 12'b1;

+end

+

+always @ (posedge clk_24KHz) begin			//on each positive edge of 24414Hz clock

+	BUT1_r <= BUT1;					//capture button 1 state to BUT1_r

+	BUT2_r <= BUT2;					//capture button 2 state to BUT2_r

+	cntr <= cntr + 15'd1;				//increment cntr LED blink counter

+	

+	if(reset == 1'b0) begin				//if bit15 of rst_cnt is not set yet

+		rst_cnt <= rst_cnt + 15'd1;		//increment the counter rst_cnt

+	end

+

+	if(BUT1_r == 1'b0 && BUT2_r == 1'b0 && reset == 1'b1) begin	//if bit15 of rst_cnt is set and both buttons are pressed

+		mode <= mode ^ 1'b1;					//toggle the mode

+		rst_cnt <= 15'd0;					//clear debounce rst_cnt

+	end

+	

+	LED1_m0_r <= ~BUT1_r;				//copy inversed state of button 1 to LED1_m0_r

+	LED2_m0_r <= ~BUT2_r;				//copy inversed state of button 2 to LED2_m0_r

+	

+	if(cntr == 15'd12207) begin			//when 0.5s pass

+		LED1_m1_r <=  1'b0;			//reset LED1_m1_r

+		LED2_m1_r <=  1'b1;			//set LED2_m1_r

+	end

+	if(cntr > 15'd24414) begin			//when 1.0s pass

+		cntr <= 15'd0;				//clear cntr

+		LED1_m1_r <=  1'b1;			//set LED1_m1_r

+		LED2_m1_r <=  1'b0;			//reset LED2_m1_r

+	end

+end

+

+endmodule

diff --git a/src/evb-yosys-demo/ice40hx8k-evb/ice40hx8k-evb.pcf b/src/evb-yosys-demo/ice40hx8k-evb/ice40hx8k-evb.pcf
new file mode 100644
index 0000000..3d072ff
--- /dev/null
+++ b/src/evb-yosys-demo/ice40hx8k-evb/ice40hx8k-evb.pcf
@@ -0,0 +1,5 @@
+set_io CLK J3

+set_io BUT1 K11

+set_io BUT2 P13

+set_io LED1 M12

+set_io LED2 R16