Could we get some support regarding SPI on the AFE5809EVM board?

We are controlling the SPI from an ARM chip with the following configuration:

SCLK - 128 kHz

Data Width - 24 bits

Shift direction - MSB first

The data that comes out has been verified with an oscilloscope.

However, when the signals are connected to the SCLK, SEN, SDATA, GND pins, we are not able to have it working.

We use the exact same series of command as used by the AFE5809 EVM GUI (as it allows us to record its commands). The USB is disconnected and we are purely running the SPI from the on board pins.

Any suggestions as to why it might not be working?



13 Replies