Arduino MEGA 2560 R3 User manual

USER’S MANUAL
1. AVR lab board
Figure 1 shows a picture of the assembled lab board that contains peripherals, connectors, and
the Arduino MEGA 2560 R3 microcontroller board. The serial number of my lab board is #168.
Figure 1: AVR Lab Board
2. Wiring
This wire connection worked on AVR lab borad #168.
AVR Pins (top and bottom row) Input/Output Device Pins (middle row)
Port Group Pin Port Group Pin
PORT F PF0 LCD DATA D0
PORT F PF1 LCD DATA D1
PORT F PF2 LCD DATA D2
PORT F PF3 LCD DATA D3
PORT F PF4 LCD DATA D4
PORT F PF5 LCD DATA D5
PORT F PF6 LCD DATA D6
PORT F PF7 LCD DATA D7
PORT E PE2 MOTOR Mot
PORT D RDX4 INPUTS PB0
PORT D RDX3 INPUTS PB1
PORT A PA4 LCD CTRL BE
PORT A PA5 LCD CTRL RW

PORT A PA6 LCD CTRL E
PORT A PA7 LCD CTRL RS
PORT C PC0 KEYPAD C3
PORT C PC1 KEYPAD C2
PORT C PC2 KEYPAD C1
PORT C PC3 KEYPAD C0
PORT C PC4 KEYPAD R3
PORT C PC5 KEYPAD R2
PORT C PC6 KEYPAD R1
PORT C PC7 KEYPAD R0
PORT L PL0 LED BAR LED2
PORT L PL1 LED BAR LED3
PORT L PL2 LED BAR LED4
PORT L PL3 LED BAR LED5
PORT L PL4 LED BAR LED6
PORT L PL5 LED BAR LED7
PORT L PL6 LED BAR LED8
PORT L PL7 LED BAR LED9
P11 +5V MOTOR OpE
3. Initial State
Figure 2 shows an initial state of the lab board. ‘G’ represents the initial state of the drone,
which means the drone is grounded at the beginning.

Figure 2: Initial State
4. Start
Figure 3 shows a picture of the start state. After pressing PB0 to start the program, the LED
lights is going to flash. When it flashes three times, then you can start to input the location of the
accident.
Figure 3: Start
5. Input State
Figure 4 shows a picture of Input State, which is a state waiting for the user to input.

Figure 4: Input State
6. Input Accident Location
Figure 5 ~ Figure 7 show every step of inputting accident location, which has two parameters
x and y.
Figure 5: Input the x value

Figure 5 shows what is on the LCD when the user input the x value of the accident location.
Here we take 22 as an example.
Figure 6: End of the x value
After pressing ‘*’ key, there comes a comma on the LCD. This means the input of the first
value x is finished, and the user can input next value y now.

Figure 7: Input the y value
Figure 7 shows that LCD displays what you input for y value of the accident location. Then
user can press ‘#’ to end the input of the y value, and it means user has already finished the input of
the accident location. After this operation, the search will start automatically.
7. Search State
Figure 8 shows the picture of searching procedure. The LCD displays the current location of
the drone with state ‘S’ and x, y, height in the first line. And LCD displays ‘not found’ in the second
line, and this means it have not found the location yet.
Figure 8: Searching
8. Found Accident
Figure 9 shows what displays on the LCD when the program found the location with x, y and
height, and it also has a state of the drone meaning grounded. Since the drone needs to fly back,
so the result will keep on the LCD for about 3 seconds.

Figure 9: Found the accident location
9. Fly Back
Figure 10 shows what display on the board when the drone flies back.
Figure 10: Drone flies back
10 Abort State
Figure 11 shows the Abort State. Every time user press PB1 to input ‘Abort’ state to the program,

the LCD displays Figure 11.
Figure 11: Abort State