Hi,
Yes, there will be a slight delay between bytes when using the loop method but since SPI is a synchronous bus I don't think it'll be a problem in real life. With that said I HAVE run into a device which had a minimum SPI clock frequency. In that particular case SHIFTOUT was too slow all together but if it had been just on the limit then something like this loop method MIGHT have messed with it. You'd need to scope the output to determine the actual delay and compare that to the datasheet of the device you're interfacing. I'd venture a bet that it'll work just fine.

OK, got it regarding the commas, you didn't mean to actually send them out, you're just talking about the syntax of the SHIFTOUT command, thanks.

/Henrik.