SAMD21 Connection to PC port

Products & Technology XIAO
#1

I have tried many times to connect the SAMD21 to the Arduino IDE via the USB cable, even resetting the board, but I have never been able to load a program. Can you suggest another way to upload a sketch?

#2

make sure your usb cable is data AND power and not power only… try different usb cables

#3

Hi!, my usb cable is ok. I discovered something strange. There was a wrong statement in my program that the compiler didn’t report:

attachInterrupt(digitalPinToInterrupt(PinInter),count1,FALLING) ;

When I corrected it , the upload went right away.

attachInterrupt(PinInter, count1, FALLING);

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