Front Panel
View of the front panel
Components of the front panel
DIP switch
The device has a DIP switches on the front panel which enable the control of various key functions such as:
- booting mode choice
- microUSB signal choice
- choosing Linux console or RS232 signal
- realisation of a user written code
DIP switch placement on front panel
Switch options
|
Switch No. |
Positions |
Descripton |
|---|---|---|
|
1 |
OFF- eMMC boot ON - USB boot |
Boot select - switching between booting device |
|
2 |
2: OFF 3: OFF - SOM USB 2: ON 3: OFF - none 2: OFF 3: ON - UART4 (Linux console) 2: ON 3: ON - ESP UART |
USB select - microUSB signal choice |
|
3 |
||
|
4-5 |
Unassigned |
Currently not used |
|
6-8 |
OFF/ON |
User options |
Connections diagram
Expander D
User defined DIP-Switch options are connected to the expander D which is connected to the CPU via I2C4 interface.
USB1
USB select 1 and USB select 2 signals are connected to the multiplexer A associated with USB1.
Signal LEDs
The device is equipped with total of 8 LEDs. 2 of these LEDs are placed on the mainboard, while the other 6 are on the front panel of the HMI board.
LEDs location
LEDs connections
|
Description |
User space name |
|---|---|
|
CPU Led |
gpiochip8 8 |
|
User Led 1 G |
gpiochip7 10 |
|
User Led 1 R |
gpiochip7 5 |
|
User Led 1 B |
gpiochip7 12 |
|
User Led 2 G |
gpiochip7 13 |
|
User Led 2 R |
gpiochip7 11 |
|
User Led 2 B |
gpiochip7 15 |
LEDs connection diagram
ESP32
ESP LED is connected directly to the GSM modem.
GSM
GSM LED is connected directly to the GSM modem.
ETHERNET PHY
ETH activity LED and ETH link LED are connected directly to the ETHERNET physical layer.
Expander B
CPU LED is connected to the expander B which is connected with CPU via SPI1 interface.
Expander D
Power LED, User LED 1 and User LED2 are connected to the expander D which is connected with CPU via I2C4 interface.