From 1b839d2388653b6ff850ae812adc340ddffcd514 Mon Sep 17 00:00:00 2001
From: Stefan Beller <stefanbeller@googlemail.com>
Date: Tue, 22 May 2012 20:15:07 +0200
Subject: [PATCH] TestTarget only outputs alphabet chars.

---
 firmware/main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/firmware/main.c b/firmware/main.c
index c7efef0..e321561 100755
--- a/firmware/main.c
+++ b/firmware/main.c
@@ -376,6 +376,8 @@ int main(void) {
 		SPDR = j++;
 		clockWait(1); // wait 320 us
 		SPDR = j++;
+		if (j >= 'Z')
+			j = 'A';
 	}
 #endif