improved reset-lufa-cdc helper

2 files changed, 18 insertions, 6 deletions

diff --git a/tools/reset_lufa_cdc b/tools/reset_lufa_cdc
index d1f4a80..09cc8cb 100755
--- a/tools/reset_lufa_cdc
+++ b/tools/reset_lufa_cdc
@@ -1,9 +1,15 @@
 #!/bin/bash
 
-echo "resetting device .."
-echo $1 > /dev/ttyACM0
+DEVICE_FILE="/dev/ttyACM0"
 
-echo "waiting for device to enumerate .."
-sleep 4
+if [ -c $DEVICE_FILE ]; then
+    echo "resetting device .."
+    echo $1 > /dev/ttyACM0
+
+    echo "waiting for device to enumerate .."
+    sleep 4
+else
+    echo "'$DEVICE_FILE' not found ... device is probably already in bootloader mode - doing nothing"
+fi
 
 exit 0
diff --git a/tools/reset_lufa_cdc_nowait b/tools/reset_lufa_cdc_nowait
index 47587ac..ac47368 100755
--- a/tools/reset_lufa_cdc_nowait
+++ b/tools/reset_lufa_cdc_nowait
@@ -1,6 +1,12 @@
 #!/bin/bash
 
-echo "resetting device .."
-echo $1 > /dev/ttyACM0
+DEVICE_FILE="/dev/ttyACM0"
+
+if [ -c $DEVICE_FILE ]; then
+    echo "resetting device .."
+    echo $1 > /dev/ttyACM0
+else
+    echo "'$DEVICE_FILE' not found ... device is probably already in bootloader mode - doing nothing"
+fi
 
 exit 0