Front Panel

Tiger City IMX Industrial Computer with Linux OS 

 View of the front panel 

 

 Components of the front panel 

 

 DIP switches 

 Signal LEDs 

 OLED display 

 Joystick 

 Reset button 

 

 DIP switches 

 The device has 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 

 user-written code 

 

 DIP switches placement on the front panel 

 

 Switch options 

 

 

 

 

 Switch No. 

 

 

 Positions 

 

 

 Description 

 

 

 

 

 

 

 1 

 

 

 OFF - eMMC boot 

 ON - SD card boot 

 

 

 Boot select - switching between booting device 

 

 

 

 

 2 

 

 

 OFF - USB1 OTG 

 ON - UART4 (Linux console) 

 

 

 USB select - microUSB signal choice 

 

 

 

 

 3 

 

 

 OFF - UART1 (SOM user) 

 ON - UART4 (Linux console) 

 

 

 RS232 - SOM UART RS232 select 

 

 

 

 

 4 

 

 

 OFF - UART2 RS232 user 

 ON - ESP32 console 

 

 

 RS232 - SOM UART RS232/ESP32 select 

 

 

 

 

 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 the I2C3 interface. 

 USB1 

 The USB MUX select 1 and the USB MUX select 2 signals are connected to the multiplexer A associated with USB1. 

 Signal LEDs 

 The device is equipped with 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 

 

 

 Label 

 

 

 

 

 

 Power LED 

 

 gpiochip6 9 

 

 

 "LED_5V" 

 

 

 

 CPU LED 

 

 gpiochip0 3 

 

 

 "LED_MAINBOARD" 

 

 

 

 

 User LED 1 G 

 

 

 gpiochip6 10 

 

 

 "LED3_GREEN" 

 

 

 

 

 User LED 1 R 

 

 

 gpiochip6 5 

 

 

 "LED3_RED" 

 

 

 

 

 User LED 1 B 

 

 

 gpiochip6 12 

 

 

 "LED3_BLUE" 

 

 

 

 

 User LED 2 G 

 

 

 gpiochip6 13 

 

 

 "LED4_GREEN" 

 

 

 

 

 User LED 2 R 

 

 

 gpiochip6 11 

 

 

 "LED4_RED" 

 

 

 

 

 User LED 2 B 

 

 

 gpiochip6 15 

 

 

 "LED4_BLUE" 

 

 

 

 

 LED connection diagram 

 

 ESP32 microcontroller 

 ESP LED is connected directly to the ESP32 microcontroller. 

 GSM 

 GSM LED is connected directly to the GSM modem. 

 ETHERNET‎ 

 ETH activity LED and ETH link LED are connected directly to the ETHERNET physical layer. 

 Expander D 

 Power LED, User LED 1 and User LED2 are connected to the expander D which is connected to the CPU via the I2C3 interface. 

 OLED display 

 The device is equipped with a 0.87” black and white display with a resolution of 128x32 px. 

 OLED display placement 

 

 OLED device 

 Part number:  SCE087002-V01 

 

 OLED connections table 

 

 

 

 

 OLED pin 

 

 

 Description 

 

 

 User-space name 

 

 

 

 

 

 

 RES# 

 

 

 RESET 

 

 

  X 

 

 

 

 

 SCL 

 

 

 I2C3 clock 

 

 

  X 

 

 

 

 

 SDA 

 

 

 I2C3 data 

 

 

  X 

 

 

 

 

 VCC 

 

 

 OLED ON/OFF 

 

 

 gpiochip6 14, "OLED_EN" 

 

 

 

 

 OLED connections diagram 

 

 Expander D 

 The OLED display is connected to Expander D which is connected to the CPU via the I2C3 interface. 

 I2C3 

 The OLED display is directly connected to the CPU via the I2C3 interface. 

 Joystick 

 The device is equipped with a joystick for controlling its functions. 

 Placement 

 

 Device 

 Part number: INT-1500D 

 

 Connections table 

 

 

 

 

 Joystick signal 

 

 

 Expander D pin 

 

 

 User-space name 

 

 

 Label 

 

 

 

 

 

 

 Right 

 

 

 20 

 

 

 gpiochip6 3 

 

 

 "JOY_RIGHT" 

 

 

 

 

 Up 

 

 

 18 

 

 

 gpiochip6 1 

 

 

 "JOY_UP" 

 

 

 

 

 Left 

 

 

 17 

 

 

 gpiochip6 0 

 

 

 "JOY_LEFT" 

 

 

 

 

 Down 

 

 

 19 

 

 

 gpiochip6 2 

 

 

 "JOY_DOWN" 

 

 

 

 

 Push 

 

 

 21 

 

 

 gpiochip6 4 

 

 

 "JOY_PUSH" 

 

 

 

 

 Connection diagram 

 

 Expander D 

 Joystick is connected to the Expander D which is connected to the CPU via the I2C3 interface. 

 Reset button 

 The device has a reset button on the front panel. 

 Reset button location 

 

 Connections diagram 

 

 Watchdog + reset 

 The reset button is connected directly to the reset circuit.