AOM-DB3500 UART(DEBUG、COM1、M.2 E-Key)
UART
User Debian/Linux UART/serial port access is through the tty-devices. The ttydevices have different names depending on UART drivers for different boards.
| Device Node | COM Port Name |
| /dev/ttyFIQ0 | Debug |
| /dev/ttyS0 | COM1（COM1_2 connnector RS232 2-wire） |
| /dev/ttyS6 | M.2_E1（UART） |
DEBUG Port Connection
1.Connect the debug port cable on AOM-DB3500.
2.Connect it to your PC with a USB to COM Cable.
| DEBUG Pin Connector | |
| Pin | Signal |
| 1 | NC |
| 2 | RX_DEBUG |
| 3 | TX_DEBUG |
| 4 | NC |
| 5 | GND |
| 6 | NC |
| 7 | RTS# |
| 8 | CTS# |
| 9 | NC |
Debug Port Settings
AOM-3821 can communicate with a host server using serial cables. Common serial communication programs such as HyperTerminal, Tera Term, or PuTTY can be used in this case. The example below describes the serial terminal setup using HyperTerminal on a Windows host:
1. Connect AOM-3821 with your PC using a serial cable.
2. Open HyperTerminal on your Windows PC, and select the settings demonstrated in the photo below.
3. Insert a power adapter into the DC jack and power up the board. The Debug console log will be displayed on the terminal screen.
COM1_2——COM1
| COM1_2 Connector,COM1 RS232 Mode Pin Definition | |||
| Pin | Signal | I/O | Description |
| 1 | N/A | Not Applicable | |
| 2 | N/A | Not Applicable | |
| 3 | COM1_RX_485+ | O | COM1 RS232 Receive Data |
| 4 | COM1_RTS# | I | COM1 Request to Send |
| 5 | COM1_TXD_422- | I | COM1 RS232 Transmit Data |
| 6 | COM1_CTS# | O | COM1 Clear to Send |
| 7 | N/A | Not Applicable | |
| 8 | N/A | Not Applicable | |
| 9 | GND | Ground | |
| 10 | GND | Ground | |
| 11 | N/A | Not Applicable | |
| 12 | N/A | Not Applicable | |
| 13 | COM2_RX_485+ | O | COM2 RS232 Receive Data |
| 14 | COM2_RTS# | I | COM2 Request to Send |
| 15 | COM2_TXD_422- | I | COM2 RS232 Transmit Data |
| 16 | COM2_CTS# | O | COM2 Clear to Send |
| 17 | N/A | Not Applicable | |
| 18 | N/A | Not Applicable | |
| 19 | GND | Ground | |
| 20 | GND | Ground | |
M.2 E-Key