Hardware Reference
In-Depth Information
Functional description
If you take a look at the functionalities that this expansion board proposes, it will
give you an idea of why this is more than a display:
• A 7-inch screen with a resolution of 1024 x 600 pixels
• Capable of 5-point detection
• One audio out and one mic in
• Two RS232 ports
• One RS485 port
• Two analog channels
• 1 CAN port
• 1 integrated buzzer
• Five user keys
• Two user LEDs (green and blue)
• One embedded 3-axis accelerometer
Physical description
On the reverse side of the board, you can see the following components (also shown
in the following screenshot):
1. A multifunction connector with communication, acquisition, and power
connections. You'll find the same signals from COM1 (Tx, Rx) and an
additional COM port UART2 that is shared with RS485 #1, an additional
port RS482 #2, and finally a Control Area Network ( CAN ), which is a
network designed to be used in industrial conditions.
2. The COM1 serial port, which has been changed from its original
implementation. The provided systems are configured to debug to UART1
instead of UART0 on the BeagleBone, including a hardware driver. This
implies that you can directly connect a serial terminal to the DB9 connector.
3. Power and reset buttons (coming from BeagleBone for accessibility).
4. Buzzer.
5. JTAG connector.
6. P8 header.
7. P9 header.
8. Audio output/microphone input (blue- and rose-colored, respectively).
 
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