Added code by @danieleff to delay leaving the maple_upload script (in all platforms) until the Serial device has reconnected - this helps resolve the problem of needing to close the Arduino Serial Monitor prior to upload

Author: rogerclarkmelbourne

tools/linux/maple_upload

@@ -38,3 +38,12 @@ if [ ! -x "${DFU_UTIL}" ]; then
 fi
 
 "${DFU_UTIL}" -d ${usbID} -a ${altID} -D ${binfile} ${dfuse_addr} -R
+
+echo -n Waiting for ${dummy_port_fullpath} serial...
+
+COUNTER=0
+while [ ! -c ${dummy_port_fullpath} ] && ((COUNTER++ < 40)); do
+    sleep 0.1
+done
+
+echo Done

tools/linux64/maple_upload

@@ -38,3 +38,12 @@ if [ ! -x "${DFU_UTIL}" ]; then
 fi
 
 "${DFU_UTIL}" -d ${usbID} -a ${altID} -D ${binfile} ${dfuse_addr} -R
+
+echo -n Waiting for ${dummy_port_fullpath} serial...
+
+COUNTER=0
+while [ ! -c ${dummy_port_fullpath} ] && ((COUNTER++ < 40)); do
+    sleep 0.1
+done
+
+echo Done

tools/macosx/maple_upload

@@ -51,3 +51,12 @@ if [ ! -x ${DFU_UTIL} ]; then
 fi
 
 ${DFU_UTIL} -d ${usbID} -a ${altID} -D ${binfile} -R ${dfuse_addr} -R
+
+echo -n Waiting for ${dummy_port_fullpath} serial...
+
+COUNTER=0
+while [ ! -c ${dummy_port_fullpath} ] && ((COUNTER++ < 40)); do
+    sleep 0.1
+done
+
+echo Done

tools/win/maple_upload.bat

@@ -6,3 +6,13 @@ set driverLetter=%driverLetter:~0,2%
 %driverLetter%
 cd %~dp0
 java -jar maple_loader.jar %1 %2 %3 %4 %5 %6 %7 %8 %9
+
+for /l %%x in (1, 1, 40) do (
+  ping -w 50 -n 1 192.0.2.1 > nul
+  mode %1 > nul
+  if ERRORLEVEL 0 goto comPortFound
+)
+
+echo timeout waiting for %1 serial
+
+:comPortFound