Hi,
I have just installed the latest version (1.6.12) of the Arduino SAM package for the Cortex-M3 into the latest version (1.8.13) of The Arduino development environment into Widows 7. When I plug in the two ports on the Arduino Due, Windows loads the usbser.sys driver for the both ports.
Device Manager reports the programming port as an Arduino Programming Port and show it assigned to COM13. It reports the other port AS an AT91 USB to Serial Converter on COM14.
However, when I try to upload a sketch, the Arduino development environment reports:
No Device found on COM13
The fact that the ports are identified and assigned drivers implies that the cables are OK and the ports on both the Arduino and the host are working.
When I plug in the two ports on the Arduino Due,.. ??????
Select Arduino DUE (Programming Port) with Tools/Board.
Select the correct COM port for Arduino DUE(Programming Port) with Tools/Port
Push the Erase button for 3 seconds, then push the Reset button for 3 seconds (not necessary in normal condition though)
Upload a basic sketch.
If this manipulaton fails, you may have had an issue during the uploading sequence of Arduino DUE compiler version.
Try this out:
Delete the sam folder that you see here:
...packages/arduino/hardware/sam
Then select Tools/board/Board manager. Do not select the last version but a previous one. Try again the above manipulation