I'm using AD9910 with parallel port.
I don't know how to change frequency & Amplitude.
I can change frequency by parallel port.
Following is my code.
//Initializing register by serial.
TxENABLE = High;
F1 = 1;
F0 = 0;
P1 = 0x1A;
P0 = 0xAA;
TxEN = 0;
P1 & P0 is connected directly to parallel port(D0 ~ D15).
By this way, I can set frequency.
But I don't know how to set Amplitude.