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arduino / ArduinoCore-sam

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Fix the problem of unusable programming port for some Due boards #123

Open zhengqi-wang opened 3 years ago

zhengqi-wang commented 3 years ago

Fix the problem of unusable programming port for some Due boards by making the erase time longer. https://forum.arduino.cc/t/cannot-upload-to-arduino-due-except-when-pressing-button-erase/517605

Add some readme information based on https://petervanhoyweghen.wordpress.com/2013/02/25/modifying-the-atmega16u2-firmware-on-the-due/

By adopting the proposed changes, the problem is generally solved. The problem will only occur when a heavy serial port usage is in the running program. It is reasonable and it can be overcome by pressing the erase button or clicking upload more times.

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