I am interfacing a slave MAX30003 analog front end ECG (Devolpement board, MAX30003) to a master SPBTLE-1S BLE microcontroller (Devolpement board, SPBTLE-1S). However, I am unable to see any data during a read operations.
Attached is a logic analyzer trace. The logic snapshot is an attempt to read the CNFG_GEN (0x10) register:
As you can see, the MISO line doesn't reply with data. From the datasheet, the MISO line should at least by at a high state.
When I tried to use a pull-up resistor to force its state to high (as suggested here), I got the following result:
Any help would be greatly appreciated!