More robust AVR programming

diff --git a/scripts/avr109-flash.py b/scripts/avr109-flash.py
index 7aeb6e01d3c85fe0ae9e02eae86cc41f51472f17..87b919d0d14b1ec0362035ec0fbc228fad2df497 100755 (executable)
--- a/scripts/avr109-flash.py
+++ b/scripts/avr109-flash.py
@@ -93,10 +93,12 @@ call(['gpio', '-g', 'write', '27', '1'])
 time.sleep(0.1)
 
 # Sync
-send('\x1b')
+for i in range(10): send('\x1b')
 
 # Flush serial
-recv(sp.in_waiting)
+try:
+    recv(sp.in_waiting)
+except: pass
 
 # Get bootloader ID
 send('S')