NU32v2: Output Compare, PWM, and Analog Output

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Code for PWM: 

OpenTimer2(T2_ON | T2_PS_1_4, 1000); // for 20kHz PWM: 80000000Hz / 4ps / 20000Hz = 1000
OpenOC1(OC_ON | OC_TIMER2_SRC | OC_PWM_FAULT_PIN_DISABLE, 0, 0); // PWM output on Pin D1
SetDCOC1PWM(duty); // unsigned int duty from 0-1000
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