An embedded systems project to tackle the real-world problem of the high computational power requirement of AoA (Angle of Arrival) devices using the TM123GH6PM microcontroller under low power and low cost.
| Components | Qty |
|---|---|
| TM123GH6PM Tiva Board | 1 |
| LM2902 Op-amp | 1 |
| CMC-9745-44P Mic | 4 |
| 2.2kΩ resistor | 4 |
| 1kΩ resistor | 4 |
| 10kΩ resistor | 4 |
| 100kΩ resistor | 4 |
| 0.1μF capacitor | 2 |
| 1μF capacitor | 4 |
| 10μF capacitor | 1 |
Each microphone utilizes this circuit
| Peripherals used |
|---|
| ADC0 (Sequence Sampler) |
| ADC1 (Digital Comparator) |
| Timers |
| NVIC |
| DMA |
| UART |
Using UART, these commands can be given as input to the microcontroller.
reset: This command sends a request to the M4F board to reset the hardware. The reset request is performed viaNVIC_APINT_SYSRESREQaverage: Displays an average value of each microphone in DAC units.level: Sets the threshold detection range for the digital comparator.aoa: Displays the most current value of the Angle of Arrival of an event.aoa always: Displays the Angle of Arrival every time an event is detected.tdoa: Displays the Time Difference of Arrival information of the mics for an event.