From a91c8b1b04bcd313978d18c2a71fd084dd180824 Mon Sep 17 00:00:00 2001
From: Todd Fleming <tbfleming@gmail.com>
Date: Wed, 18 Jan 2017 13:51:47 -0500
Subject: [PATCH] flash: only write when something changed

---
 grbl-lpc/flash.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/grbl-lpc/flash.cpp b/grbl-lpc/flash.cpp
index 0355d04..a42b843 100644
--- a/grbl-lpc/flash.cpp
+++ b/grbl-lpc/flash.cpp
@@ -35,6 +35,8 @@ void eeprom_init()
 
 void eeprom_commit()
 {
+    if (!memcmp(flash_buffer, flash_memory, flash_size))
+        return;
     unsigned prepCommand[5] = {
         50,
         flash_sector,