Finish USBDevice.detach() placeholder. #397
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The ide fails to make the attempt to upload a sketch if the COM port is down after detaching the USB serial CDC endpoint. The RunnerException in SerialUploader.java:152 should be cought and handle the error that occurs when the COM port is not available. A console output should be given instructioning the user to press the reset button, power cycle, or plug the board into a USB port so that the bootloader can upload a sketch from the IDE. This would allow a devolper to upload sketches even when the sketch disables usb, or takes full controll of the keyboard or mouse preventing the user from using their computer.
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Is there any reason this has not been merged yet? I was stuck on USBDevice.detach() not working for like 10h until I found this. |
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Only have Arduino Micro board to test on.
The ide fails to make the attempt to upload a sketch if the COM port is unavailable after detaching the USB serial CDC endpoint.
The RunnerException error in SerialUploader.java:152 should be caught and handled when attempting to upload to a nonexistent COM port. A console output should be given instructing the user to press the reset button, power cycle, or plug the board into a USB port so that the bootloader can upload a sketch from the IDE. This would allow a developer to upload sketches even when the sketch disables USB, or takes full control of the keyboard or mouse preventing the user from using their computer.
For example; if USBDevice.detach() is called in setup() a user would need to instruct avrdude on the command line and then get the device into the bootloader to upload a sketch. In practice the CDC endpoint resets the device and the IDE waits for the bootloader to upload the code. The bootloader can be physically triggered and a sketch uploaded if the IDE ignores the error when attempting to open the serial port and send the reset signal.