Differences in setting up for SMBUS:
On F4, I set the following bits in CR1:
PEC
POS
ENPEC
SMBTYPE
SMBUS
On F7, are there similar bits?
I see PECEN - is that the same as ENPEC on F4?
How do you set up SMBUS on F7? (on F4, it was done with SMBTYPE and SMBUS bits.)
