Some questions for your ADuC7026

Dear Sir/Madam,

I came from you another site AD7794. And I got one source cord for AD7794's from you.

We are controling for our product by your ADuC7026. So I refered your source code AD7794 to our development.
The source code AD7794 you sent seem to communicate with ADC via I/O port pin.

So why dont you use SPI-controler on ADuC7026 for this communication?

Now we are getting the trouble of the control by SPI-controler on ADuC7026.
Can we use your SPI-controler of ADuC7026 for any control?