From f1592d01eeb73b23d628bc802f242ac49f30d33e Mon Sep 17 00:00:00 2001
From: Kalle Raiskila <kraiskil@iki.fi>
Date: Sun, 31 Jan 2016 12:51:34 +0200
Subject: Allow DESTDIR and PREFIX overrides from environment.

---
 config.mk | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/config.mk b/config.mk
index b6c0f6a..fa17007 100644
--- a/config.mk
+++ b/config.mk
@@ -1,4 +1,4 @@
 CXX = clang
 CC = $(CXX)
-DESTDIR =
-PREFIX = /usr/local
+DESTDIR ?=
+PREFIX ?= /usr/local
-- 
cgit v1.2.3


From 438c0b55aea79da73f9be6ace4ddf2b77b749774 Mon Sep 17 00:00:00 2001
From: Kalle Raiskila <kraiskil@iki.fi>
Date: Sun, 31 Jan 2016 13:01:18 +0200
Subject: Port example to iceblink40 board.

---
 examples/iceblink/Makefile     | 26 ++++++++++++++++++++++++++
 examples/iceblink/README       | 10 ++++++++++
 examples/iceblink/example.v    | 24 ++++++++++++++++++++++++
 examples/iceblink/iceblink.pcf |  5 +++++
 4 files changed, 65 insertions(+)
 create mode 100644 examples/iceblink/Makefile
 create mode 100644 examples/iceblink/README
 create mode 100644 examples/iceblink/example.v
 create mode 100644 examples/iceblink/iceblink.pcf

diff --git a/examples/iceblink/Makefile b/examples/iceblink/Makefile
new file mode 100644
index 0000000..8f908a8
--- /dev/null
+++ b/examples/iceblink/Makefile
@@ -0,0 +1,26 @@
+PROJ = example
+PIN_DEF = iceblink.pcf
+DEVICE = 1k
+
+all: $(PROJ).bin
+
+%.blif: %.v
+	yosys -p 'synth_ice40 -top top -blif $@' $<
+
+%.asc: $(PIN_DEF) %.blif
+	arachne-pnr -d $(DEVICE) -o $@ -p $^ -P vq100
+
+%.bin: %.asc
+	icepack $< $@
+
+prog: $(PROJ).bin
+	iCEburn.py  -e -v -w  $<
+
+sudo-prog: $(PROJ).bin
+	@echo 'Executing prog as root!!!'
+	iCEburn.py  -e -v -w  $<
+
+clean:
+	rm -f $(PROJ).blif $(PROJ).asc $(PROJ).bin
+
+.PHONY: all prog clean
diff --git a/examples/iceblink/README b/examples/iceblink/README
new file mode 100644
index 0000000..d43a7ae
--- /dev/null
+++ b/examples/iceblink/README
@@ -0,0 +1,10 @@
+Note, there are at least two similar looking versions of the iCEblink40 evaluation board:
+-iCEblink40-HX1K
+-iCEblink40-LP1K
+
+This example assumes the iCEblink40-HX1K board.
+
+The iCEblink40 boards have an on-board programmer with USB interface from Digilent.
+You need iCEburn to program the FPGA via this interface (or the original vendor 
+tools).
+https://github.com/davidcarne/iceBurn
diff --git a/examples/iceblink/example.v b/examples/iceblink/example.v
new file mode 100644
index 0000000..6bccc1e
--- /dev/null
+++ b/examples/iceblink/example.v
@@ -0,0 +1,24 @@
+/* Binary counter displayed on LEDs (the 4 green ones on the right).
+ * Changes value about once a second.
+ */
+module top (
+	input  clk,
+	output LED2,
+	output LED3,
+	output LED4,
+	output LED5
+);
+
+	localparam BITS = 4;
+	localparam LOG2DELAY = 22;
+
+	reg [BITS+LOG2DELAY-1:0] counter = 0;
+	reg [BITS-1:0] outcnt;
+
+	always@(posedge clk) begin
+		counter <= counter + 1;
+		outcnt <= counter >> LOG2DELAY;
+	end
+
+	assign {LED2, LED3, LED4, LED5} = outcnt;
+endmodule
diff --git a/examples/iceblink/iceblink.pcf b/examples/iceblink/iceblink.pcf
new file mode 100644
index 0000000..0d5e6c1
--- /dev/null
+++ b/examples/iceblink/iceblink.pcf
@@ -0,0 +1,5 @@
+set_io LED2 59
+set_io LED3 56
+set_io LED4 53
+set_io LED5 51
+set_io clk 13
-- 
cgit v1.2.3