SPI interface with bhi260ap and ATSAMD51 MCU

[rajesh_s]

Hi,

I am using bhi260ap IMU for my project from command line as well as low level interface i can able to communicate with imu via I2C, but if i try to do the same with SPI i couldn't able to do it with either way.please help me with this issue.

Steps followed:

1.Directly connected IMU sensor with MCU which is having 1.8V as supply and communication voltage(Not working).
2.Using a level shifter, connected 3.3V supply MCU to IMU. connected MISO,MOSI,SCK,SS and VDD,VDDIO(1.8V given) and ground connected(Not working).

NOTE: Above two steps are working fine with I2C interface with their respective connections.

We have gone through the entire Datasheet and still this issue persisit. Is there any other connection required for SPI?

[BSTRobin]

Hi rajesh_s,

Could you send out your hardware schematic and let us review it?

[rajesh_s]

Hi,
I have attached schematics of both IMU carrier board and MCU.please find the attachment.

[rajesh_s]

Hi,

As per the datasheet(BHI260AP) of yours we have gone through a point

In page 25 of BHI260AP datasheet it detailed mention the Connection Diagram  and In Notes(1) it written to connect the Hostboot to VDDIO.

1.Hostboot should be HIGH (it select the host interface) in page 26 Topic-(Physical Primary Host Interface).

But in our case the Hostboot is LOW does it impact in SPI communication As it shows in your page 2 of your schematic(BHI260AP).

Can you please suggest us what to do with this query.

[rajesh_s]

Hi,
We are waiting for your reply.Please guide us through this issue.
Additional info: we configured our master (samd51) with spi mode 0 and connected all connections without any pullup or pulldown resistor (as per datasheet). we have tried frequency in a range starting from 1MHZ to 50 MHZ none of them are working.