Hello,
I’m working with a F28335 and the experimenter kit and I’m trying to connect the ADC-pins with a microphone (Roga MI-17 1/4'' free-field-microphone with BNC connection). I’m not really sure which pins I have to use. The first pin is the ADCINA0, but I’m not sure about the ground pin. Is it a “normal” GND pin or an ADC Analog Ground Pin (see http://www.ti.com/lit/ds/sprs439m/sprs439m.pdf at page 25), for example pin 33 (which equals GPIO 12). Which pins do I have to use? And is it possible to connect the microphone with the pins directly without using a low-pass filter or something else?
I’m “coding” with Simulink, which as far as I know is not very common in the TI community. I’m not really sure if the model I use is correct. At the moment I can’t get any signals out of the microcontroller, and I don’t know if some signals from the microphone are going in.
I would really appreciate any advice
Max