Using GPIO pins to interface to RI-R6C-001A -- Texas Instruments HF Reader system Series 6000- Transceiver IC

[EMars]

Hi all -

I'm not sure where this post belongs-- so I will post in different areas in attempt to find someone that may have done this:

I am trying to port and old design to a STM32F103VCT6. Not sure if anyone out there has done this. I can currently read and write to registers using 4 GPIO pins connected to RI-R6C-001A

DIN

DOUT

SCLK

M_ERROR

Currently having issues with command 0x28 broadcasting to RF TAG-- I M_ERROR goes high after the first three bits of data after 0x28 command.