From bcf548583fa82acaac4f9829399cba47f21a5cf4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?King=20K=C3=A9vin?= <kingkevin@cuvoodoo.info>
Date: Mon, 4 Aug 2014 10:47:32 -0700
Subject: [PATCH] add safety: ensure button is pressed before erasing

---
 pic/MDR/MDR.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/pic/MDR/MDR.c b/pic/MDR/MDR.c
index 0b648e4..259ef08 100644
--- a/pic/MDR/MDR.c
+++ b/pic/MDR/MDR.c
@@ -362,10 +362,12 @@ static void interrupt(void) __interrupt 0
 		} else {
 			led_on();
 		}
-		/* pressed for 5s, clear memory */
+		/* button pressed for 5s, clear memory */
 		if (hold==20) {
 			led_on();
-			clear_memory();
+			if (!(PORTB&SWITCH1)) { /* ensure the button is pressed */
+				clear_memory();
+			}
 			led_off();
 			TMR4ON = 0;
 		}