outputSin(amp,freq,offset)

Function description: Generate a Vo=Voffset+Vp*sin(2*pi*f*t) sine waveform. When

Vo>REF_VOLTAGE, Vo=REF_VOLTAGE; When Vo<0, Vo=0.

amp: unit in mV. Set the amplitude Vp of the sine wave. The value range 0 ~ REF_VOLTAGE. When

this value is larger than REF_VOLTAGE, amp=REF_VOLTAGE. When amp is set to 0, the function

return a DC signal with amplitude determined by offset.

freq: unit in Hz. Set the frequency of the sine wave . The value ranges 0 ~ 40. When this value is

larger than 40, it takes 100; when it is equal to 0, the function returns a DC signal.

offset: unit in mV. Set the DC offset Voffset of the sine wave. The value ranges 0 ~ REF_VOLTAGE.

When this value is larger than REF_VOLTAGE, amp=REF_VOLTAGE.