Alright, the DAC is working fine, this FL5160 chip is a real pain in my ass as it always has been!  as I expected, things just do not work like they show in the datasheet; trying to power the chip from the AC mains just doesn't work right.   As I was saying, this chip is very strange and is very touchy.

As much as I tried numerous things to smooth the supply for the chip when using their circuit, the chip just wasn't happy.  It would startup but die.  I'm not sure which approach I'll end up with, but for now I'm moving on and will work on the rest of the code, circuit, and LCD panel.

Since the easiest fix I did with my oven right now, with the Pic32 board, was to just replace their cheap 9v AC transformer with a 12v one, that may end up being the requirement I'll end up with this board as well.

If the stupid 5160 ran off normal 5v/3.3v supply, then it would be so easy.  But since it needs about 10-12vdc for it's main supply, it becomes a pain with this oven because they ship it with a cheap 9V ac transformer that outputs around 9-11vdc, but isn't consistent.

So with a good 12v ac trans, we have all the dc we need for the board and the 5160.   I hate using this chip because its such a pain in the ass, but it works awesome once the circuit is right.  And I am not aware of anything else out there that does what this chip does all in one package.  I could put a zero-cross detection into the cpu via a GPIO reading the aC mains, but then you have to account for a timer for that, and more overhead firing the FETs for just stupid fan control.  Makes so much more sense to have that offloaded as I'm doing with the 5160.

So on to the rest of the board, I'll update more once I dig into LCD stuff and the meat of the thing...