I have been working on some code to communicate with an NFC chip (PN532) from my MSP430F5659 for a while now and the code works great. we recently got our main bored in so its time to move from the development bored to the main bored. however even with the same value of pull up resistors and everything being exactly the same im having erratic behavior on both the SDA and SDL lines. im running the exact same code with nothing else added to the code for anything else on the board. nothing else is on the sda and sdl line at the moment. iv checked and rechecked and everything should be fine but on rising edges it gets screwed up. any thoughts?