Nothing in Received Data Register (RDR)

[janieleung]

Hi,

We have been trying to set up SPI communication with a Arduino Uno Master and Teensy 4.1 Slave. After checking with an oscilloscope, we can see that the signals coming from the Master are fine, but the slave end just isn't able to read the number being transmitted correctly and stop reading after 1 byte.

Our current wiring is 10-10, 11-12, 12-11, 13-13. Any idea on how to resolve this? Thanks.