Demonstrations for ADC operation.
Prepare requirements: (1)PD6 connects to slide rheostat, external voltage
supply, temperature sensor, etc.

1. ADC_SingleShunter_Ebus_Demo: TimA generate event 0 and event 1 to
trigger ADC_CHANNEL_5 to sample and convert PD6's input, after converted,
will inform APP by interrupt event.

2. ADC_DualShunters_Ebus_Demo: TimA generate TRGO event to trigger
ADC_CHANNEL_5 and ADC_CHANNEL_6 to sample, after converted, will inform APP
by interrupt event.