1. George Hadley Kelli Hacker Sean Ma Jacob Champion
ECE 477 Group 3 The Gauntlet
George Hadley
Kelli Hacker
Sean Ma
Jacob Champion

2. Software Design Considerations
PIC24F uses a modified Harvard architecture
Program memory (Flash) holds up to 87K instructions
Data memory (RAM) holds up to 16KiB
Code is structured in an interrupt-driven design
Interrupts (timers, pin I/O, etc.) set flags and wake the uC, which acts on those flags
Saves power

3. Software Design Considerations
Multiple on-chip peripherals to initialize
3 SPI (sensors, microSD, audio)
1 I2C (character LCD)
1 UART (GPS)
1 ADC (battery)
4 interrupt pins …
Initialization also includes pin mapping

4. Main Program Flow

5. Hierarchy Diagram

6. Hierarchy Diagram

7. Hierarchy Diagram

8. Questions?