Generate patterns through CPLD(MAXII)?

How long is the pattern you need to generate?

Is a fixed pattern or do you need to change it?

In the simplest cases a CPLD would be enough: I mean if you have a medium-short fixed pattern or a well defined set of short patterns.

The more complex is the pattern generator, the bigger the device you'll need.

I'd suggest a device like EP3C16F484 or similar range if you want a generator with a lot of features, possibly controlled through Ethernet or serial port.

If you instead need only a simple push-button-and-generate-pattern device, stick on a CPLD.