Dear Praveen,
We have made our own PCB based on the circuit from “Pulse Oximeter via Finger Clip Reference Design with BLE Connectivity “. We modified the firmware based on the evaluation module by simply mapping the GPIO ports (from MSP430 5529 to 5528). We also use the GUI software from the evaluation module for testing purpose.
After plugging the USB cable, the GUI detected the PCB and allows us to diagnose the finger clip or send control commands to stop/start AFE, Tx and Rx. However, there is not data collected and displayed on the “ADC Capture & Analysis”. On the PCB, the blue LED light is flashing when we send SPI command, but the Green light never flashed. What could be the issue of causing this?
Thanks a lot for your help.
Best regards,
Jack
