From 72f5e640af8bdccb641bb561757021c0a3d83edb Mon Sep 17 00:00:00 2001
From: David Shah <davey1576@gmail.com>
Date: Sat, 9 Jun 2018 19:38:37 +0200
Subject: Adding basic placement constraints

Specify the attribute (* LOC="bel_name" *) on any cell to constrain its
placement to that bel.

Signed-off-by: David Shah <davey1576@gmail.com>
---
 ice40/blinky.v | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 77 insertions(+), 3 deletions(-)

(limited to 'ice40')

diff --git a/ice40/blinky.v b/ice40/blinky.v
index 6b97c5a9..80f92b06 100644
--- a/ice40/blinky.v
+++ b/ice40/blinky.v
@@ -7,24 +7,98 @@ module blinky (
 	output led5_pin
 );
 	wire clk, led1, led2, led3, led4, led5;
+	
+	(* LOC="0_3_lc0" *)	
+	SB_IO #(
+		.PIN_TYPE(6'b 0110_01),
+		.PULLUP(1'b0),
+		.NEG_TRIGGER(1'b0)
+	) led1_iob (
+		.PACKAGE_PIN(led1_pin),
+		.LATCH_INPUT_VALUE(),
+		.CLOCK_ENABLE(),
+		.INPUT_CLK(),
+		.OUTPUT_CLK(),
+		.OUTPUT_ENABLE(),
+		.D_OUT_0(led1),
+		.D_OUT_1(),
+		.D_IN_0(),
+		.D_IN_1()
+	);
+	
+	(* LOC="0_3_lc1" *)	
+	SB_IO #(
+		.PIN_TYPE(6'b 0110_01),
+		.PULLUP(1'b0),
+		.NEG_TRIGGER(1'b0)
+	) led2_iob (
+		.PACKAGE_PIN(led2_pin),
+		.LATCH_INPUT_VALUE(),
+		.CLOCK_ENABLE(),
+		.INPUT_CLK(),
+		.OUTPUT_CLK(),
+		.OUTPUT_ENABLE(),
+		.D_OUT_0(led2),
+		.D_OUT_1(),
+		.D_IN_0(),
+		.D_IN_1()
+	);
+
+	(* LOC="5_17_lc1" *)	
+	SB_IO #(
+		.PIN_TYPE(6'b 0110_01),
+		.PULLUP(1'b0),
+		.NEG_TRIGGER(1'b0)
+	) led3_iob (
+		.PACKAGE_PIN(led3_pin),
+		.LATCH_INPUT_VALUE(),
+		.CLOCK_ENABLE(),
+		.INPUT_CLK(),
+		.OUTPUT_CLK(),
+		.OUTPUT_ENABLE(),
+		.D_OUT_0(led3),
+		.D_OUT_1(),
+		.D_IN_0(),
+		.D_IN_1()
+	);
+
+	(* LOC="10_0_lc1" *)	
+	SB_IO #(
+		.PIN_TYPE(6'b 0110_01),
+		.PULLUP(1'b0),
+		.NEG_TRIGGER(1'b0)
+	) led4_iob (
+		.PACKAGE_PIN(led4_pin),
+		.LATCH_INPUT_VALUE(),
+		.CLOCK_ENABLE(),
+		.INPUT_CLK(),
+		.OUTPUT_CLK(),
+		.OUTPUT_ENABLE(),
+		.D_OUT_0(led4),
+		.D_OUT_1(),
+		.D_IN_0(),
+		.D_IN_1()
+	);
 
+	(* LOC="12_17_lc0" *)	
 	SB_IO #(
 		.PIN_TYPE(6'b 0110_01),
 		.PULLUP(1'b0),
 		.NEG_TRIGGER(1'b0)
-	) led_iob [4:0] (
-		.PACKAGE_PIN({led1_pin, led2_pin, led3_pin, led4_pin, led5_pin}),
+	) led5_iob (
+		.PACKAGE_PIN(led5_pin),
 		.LATCH_INPUT_VALUE(),
 		.CLOCK_ENABLE(),
 		.INPUT_CLK(),
 		.OUTPUT_CLK(),
 		.OUTPUT_ENABLE(),
-		.D_OUT_0({led1, led2, led3, led4, led5}),
+		.D_OUT_0(led5),
 		.D_OUT_1(),
 		.D_IN_0(),
 		.D_IN_1()
 	);
 
+	(* LOC="0_6_lc0" *)
 	SB_IO #(
 		.PIN_TYPE(6'b 0000_01),
 		.PULLUP(1'b0),
-- 
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