Fix firmware uploading to Arduino Leonardo-based boards // Resolve #40

platformio/builder/scripts/atmelavr.py

@@ -58,7 +58,6 @@ env.Replace(
 
     UPLOADER=join("$PIOPACKAGES_DIR", "tool-avrdude", "avrdude"),
     UPLOADERFLAGS=[
-        "-V",  # do not verify
         "-q",  # suppress progress output
         "-D",  # disable auto erase for flash memory
         "-p", "$BOARD_MCU",
@@ -118,7 +117,19 @@ def before_upload():
         rpi_sysgpio("/sys/class/gpio/gpio18/value", 0)
         rpi_sysgpio("/sys/class/gpio/unexport", 18)
     else:
-        return env.FlushSerialBuffer("$UPLOAD_PORT")
+        upload_options = env.get("BOARD_OPTIONS", {}).get("upload", {})
+
+        if not upload_options.get("disable_flushing", False):
+            env.FlushSerialBuffer("$UPLOAD_PORT")
+
+        before_ports = [i['port'] for i in get_serialports()]
+
+        if (upload_options.get("use_1200bps_touch", False) and
+                "UPLOAD_PORT" in env):
+            env.TouchSerialPort("$UPLOAD_PORT", 1200)
+
+        if upload_options.get("wait_for_upload_port", False):
+            env.Replace(UPLOAD_PORT=env.WaitForNewSerialPort(before_ports))
 
 
 CORELIBS = env.ProcessGeneral()
@@ -174,7 +185,7 @@ if is_uptarget:
         for item in get_serialports():
             if "VID:PID" in item['hwid']:
                 print "Auto-detected UPLOAD_PORT: %s" % item['port']
-                env['UPLOAD_PORT'] = item['port']
+                env.Replace(UPLOAD_PORT=item['port'])
                 break
 
     if "UPLOAD_PORT" not in env:

platformio/builder/tools/platformio.py

@@ -2,14 +2,17 @@
 # See LICENSE for details.
 
 import atexit
+import platform
 import re
 from os import getenv, listdir, remove, walk
 from os.path import basename, isdir, isfile, join
 from time import sleep
 
-from SCons.Script import SConscript, SConscriptChdir
+from SCons.Script import Exit, SConscript, SConscriptChdir
 from serial import Serial
 
+from platformio.util import get_serialports
+
 
 def ProcessGeneral(env):
     corelibs = []
@@ -187,6 +190,36 @@ def FlushSerialBuffer(env, port):
     s.close()
 
 
+def TouchSerialPort(env, port, baudrate):
+    s = Serial(port=env.subst(port), baudrate=baudrate)
+    s.close()
+    if platform.system() != "Darwin":
+        sleep(0.3)
+
+
+def WaitForNewSerialPort(env, before):
+    new_port = None
+    elapsed = 0
+    while elapsed < 10:
+        now = [i['port'] for i in get_serialports()]
+        diff = list(set(now) - set(before))
+        if diff:
+            new_port = diff[0]
+            break
+
+        before = now
+        sleep(0.25)
+        elapsed += 0.25
+
+    if not new_port:
+        Exit("Error: Couldn't find a board on the selected port. "
+             "Check that you have the correct port selected. "
+             "If it is correct, try pressing the board's reset "
+             "button after initiating the upload.")
+
+    return new_port
+
+
 def exists(_):
     return True
 
@@ -202,4 +235,6 @@ def generate(env):
     env.AddMethod(VariantDirRecursive)
     env.AddMethod(ConvertInoToCpp)
     env.AddMethod(FlushSerialBuffer)
+    env.AddMethod(TouchSerialPort)
+    env.AddMethod(WaitForNewSerialPort)
     return env