Any ever use those I2C to SPI bridges? I have an a multiplying DAC (8bits)...actually 5 of them, but none of them seem to come in I2C only in SPI. I can use another arduino and have it convert it. If I do this, do I need to wrote code, or will the hardware do it for me? Would the the code be easy? The best thing about the arduino is that one chip can do all 5 instead of one chip each or 2 chips to service 5. The other option is to use a NXP SC18IS602. My worry with this is that the NXP device uses a 3.3V supply. I think my other I2C signals are 5V to 0. Will the 3.3V have the same logic high threshold as the 5V? With this option I will need two chips or simply have one chip for each DAC.
The other thing I found was this...http://www.latticesemi.com/documents/rd1094.pdf
and I found something from Cypress also.
I am confused though....are those just a out of the box solutions? Or do they require additional programming?
What i am looking for is the easiest solution that will have the least amount of bugs.