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I am using the SparkFun_Serial_Controlled_Motor_Driver_Arduino_Library. I used it with Arduino UNO and it worked perfectly. But when I tried to run it with Sparkfun's SAMD21 Mini, I faced a problem with the myMotorDriver.begin() function. The code stops at this line and doesn't go to the next line. I checked the function definition but I couldn't find whats the problem. Could anyone help me with this? Am I having a problem with including the SCMD library in SAMD21 Mini?