pinDir REG_DIR_A

[totalretribution]

Im having an issue enabling input_pullup on IO7-0 and I might be misunderstanding the datasheet for SX1509 however looking at the code for pinDir it only seems to handle REG_DIR_B which is IO15-8.

It also looks like readPin and writePin only ever write to B registers.

[Bad-Assumptions]

We just had the same concern, but the functions read or write 16 bits starting at REG_DIR_B. Since the A registers always follow the B registers, they read and write all 16 pins at once.