I am using the EVAL-ADBMS6822 board. My system has the following components:
One ADBMS6822 configured as controller (MSTR=1).
One ADBMS6822 configured as peripheral (MSTR=0).
The peripheral transceiver's SPI pins are connected to an FPGA (Zybo Z7 board) in which I created a custom SPI slave in HDL.
VDD is at 3.3 V at slave side (this matches the FPGA I/O voltage).
Should be configured for Mode 3 (CPOL=1, CPHA=1) with PHAPOL.
XCVRMD is configured for standard 1 Mbps.
Common grounds are used, and isoSPI pair is connected IP
IP, IMIM.
Observation:
Using an STM32 MCU as SPI slave, the ADBMS6822 evaluates LED blinks and communication works.
Using my FPGA slave, the LED is solid.
I verified that MISO goes tri-state when CS is high.
I am stuck and i don't know what to do, looking for any clues or insights