From 20ef4efd8b6c969697784a31b3a5f374d882877a Mon Sep 17 00:00:00 2001
From: Piotr Esden-Tempski <piotr@esden.net>
Date: Sat, 18 Aug 2018 15:29:11 -0700
Subject: Added the FTDI cable pinout for reference.

---
 iceprog/iceprog.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/iceprog/iceprog.c b/iceprog/iceprog.c
index 42abd86..7029f00 100644
--- a/iceprog/iceprog.c
+++ b/iceprog/iceprog.c
@@ -40,6 +40,19 @@
 // MPSSE / FTDI definitions
 // ---------------------------------------------------------
 
+/* FTDI bank pinout typically used for iCE dev boards
+ * BUS IO | Signal | Control
+ * -------+--------+--------------
+ * xDBUS0 |    SCK | MPSSE
+ * xDBUS1 |   MOSI | MPSSE
+ * xDBUS2 |   MISO | MPSSE
+ * xDBUS3 |     nc |
+ * xDBUS4 |     CS | GPIO
+ * xDBUS5 |     nc |
+ * xDBUS6 |  CDONE | GPIO
+ * xDBUS7 | CRESET | GPIO
+ */
+
 static struct ftdi_context ftdic;
 static bool ftdic_open = false;
 static bool verbose = false;
-- 
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