Hardware Function Usage

Debug Serial

The EC-AGXOrin has an onboard Type-C debug serial port. Just connect the device to the PC directly with a Type-C cable for serial debugging. The baud rate is 115200, and no extra USB-to-serial adapter is required.

Serial debug

USB-to-serial adapter is the abbreviation of USB-to-serial TTL adapter.

Debugging

You can connect EC-AGXOrin to a PC for serial port debugging:

Serial parameter configuration

EC-AGXOrin uses the following serial port parameters:

Baud rate: 115200
Data bits: 8
Stop bit: 1
Parity: none
Flow Control: None

Using serial port debugging on Windows

On Windows, putty or SecureCRT is generally used. Among them, we recommend using the free version of MobaXterm. This is a powerful terminal software, which is introduced here. The usage of other software is similar.

Go here download MobaXterm:

Select session as Serial.
Modify Serial port to the COM port found in Device Manager.
Set Speed (bsp) to 115200.
Click the OK button.

Serial debugging on Linux

There are several options available on Linux:

minicom
picocom
kermit

The following will introduce the use of minicom.

Install minicom:

sudo apt-get install minicom

After connecting the serial cable, see what the serial device file is. The following example is /dev/ttyUSB0:

$ ls /dev/ttyUSB*
/dev/ttyUSB0

Run:

$ sudo minicom
Welcome to minicom 2.7
OPTIONS: I18n
Compiled on Jan  1 2014, 17:13:19.
Port /dev/ttyUSB0, 15:57:00
Press CTRL-A Z for help on special keys

The above prompt CTRL-A Z is the escape key, press Ctrl-a and then z to bring up the menu:

   +-------------------------------------------------------------------+
                          Minicom Command Summary                      |
  |                                                                    |
  |              Commands can be called by CTRL-A <key>                |
  |                                                                    |
  |               Main Functions                  Other Functions      |
  |                                                                    |
  | Dialing directory..D  run script (Go)....G | Clear Screen.......C  |
  | Send files.........S  Receive files......R | cOnfigure Minicom..O  |
  | comm Parameters....P  Add linefeed.......A | Suspend minicom....J  |
  | Capture on/off.....L  Hangup.............H | eXit and reset.....X  |
  | send break.........F  initialize Modem...M | Quit with no reset.Q  |
  | Terminal settings..T  run Kermit.........K | Cursor key mode....I  |
  | lineWrap on/off....W  local Echo on/off..E | Help screen........Z  |
  | Paste file.........Y  Timestamp toggle...N | scroll Back........B  |
  | Add Carriage Ret...U                                               |
  |                                                                    |
  |             Select function or press Enter for none.               |
  +--------------------------------------------------------------------+

Press O according to the prompt to enter the setting interface, as follows:

           +-----[configuration]------+
           | Filenames and paths      |
           | File transfer protocols  |
           | Serial port setup        |
           | Modem and dialing        |
           | Screen and keyboard      |
           | Save setup as dfl        |
           | Save setup as..          |
           | Exit                     |
           +--------------------------+

Move the cursor to "Serial port setup", press enter to enter the serial port setup interface, then enter the letters indicated above, select the corresponding option, and set as follows:

   +-----------------------------------------------------------------------+
   | A -    Serial Device      : /dev/ttyUSB0                              |
   | B - Lockfile Location     : /var/lock                                 |
   | C -   Callin Program      :                                           |
   | D -  Callout Program      :                                           |
   | E -    Bps/Par/Bits       : 115200 8N1                                |
   | F - Hardware Flow Control : No                                        |
   | G - Software Flow Control : No                                        |
   |                                                                       |
   |    Change which setting?                                              |
   +-----------------------------------------------------------------------+

Note: Hardware Flow Control and Software Flow Control must be set to No, otherwise it may result in failure to input.

After the setup is complete, go back to the previous menu and select Save setup as dfl to save it as the default configuration, which will be used by default in the future.

Network

The EC-AGXOrin supports Ethernet. The default network card names in the system are as follows:

Gigabit Ethernet: eth2, enP5p1s0
10Gbps Ethernet: eno1

For the network configuration, please refer to Network Configuration.

SIM Card

The SIM card slot of the EC-AGXOrin is used together with a 4G/5G module to provide mobile network connectivity. The 4G/5G module is optional, and the SIM card function is available only after the module has been installed inside the chassis. The SIM card insertion direction is shown in the figure below. Please power off the device before inserting or removing the SIM card.

CAN

CAN (Controller Area Network) is a kind of serial communication network which can effectively support distributed control or real-time control. See the TI application report for more details.

The CAN interface of the EC-AGXOrin is led out from the 24Pin Phoenix terminal block. When wiring, connect CAN_H to CAN_H and CAN_L to CAN_L.

On Ubuntu, run apt update && apt install can-utils first to install the test tools. The communication test commands are as follows:

# Close the can0 device
ip link set can0 down
# Set the bitrate to 250Kbps
ip link set can0 type can bitrate 250000
# Open the can0 device
ip link set can0 up
# Run candump on the receiving end, blocking and waiting for frames
candump can0
# Run cansend on the sending end to send a frame
cansend can0 123#1122334455667788

If no frames are received after sending, please check whether the bus CAN_H and CAN_L are loose or reversed.

IO

INPUT

sudo su
gpioget `gpiofind "PAG.01"`

OUTPUT

Set high:

sudo su
gpioset `gpiofind "PZ.01"`=1

Set low:

sudo su
gpioset `gpiofind "PZ.01"`=0

UART (RS232 / RS485)

The EC-AGXOrin leads out the RS232, RS485 and UART interfaces through the 24Pin Phoenix terminal block. For the pin definitions, see the Interface Description in Product Introduction. When wiring, the TXD/RXD of the RS232 need to be cross-connected to the peer device, and the 485_A/485_B of the RS485 are connected to the A/B of the peer device correspondingly.

You can use ls /dev/tty* to check the serial device nodes in the system. For sending and receiving tests, you can use the cat and echo commands or serial terminal tools such as minicom (the tool usage is the same as that in the Debug Serial section).

Watchdog

The EC-AGXOrin has 1 external watchdog, corresponding to /dev/wdt_crl. Usage:

# Enable the watchdog
echo e > /dev/wdt_crl

# Set the timeout, there are 4 available values
echo 0 > /dev/wdt_crl # 0.64 sec
echo 1 > /dev/wdt_crl # 2.56 sec
echo 2 > /dev/wdt_crl # 10.24 sec
echo 3 > /dev/wdt_crl # 40.96 sec

# Disable the watchdog
echo d > /dev/wdt_crl

Audio

Users can output audio through the headphone jack and the HDMI port. You can switch between the headphone and HDMI interfaces in the system settings, selecting one for output.

In the terminal, execute cat /proc/asound/cards to view the sound cards: HDA represents the HDMI sound card, and APE represents the headphone sound card.

HDMI output:

aplay -D hw:HDA,3 hdmi.wav # hdmi.wav needs to be a dual-channel audio file

Headphone output:

aplay -D hw:APE,0 test.wav

Audio input (recording via the headphone jack):

arecord -D hw:APE,0 -c 2 -r 16000 -f S32_LE test.wav

Storage

The EC-AGXOrin supports various storage device interfaces (USB, TF card, etc.). After a storage device is inserted, it will be recognized as a node similar to /dev/sdb1, /dev/nvme0n1p1 or /dev/mmcblk1p1, which is the same as in the desktop PC Linux environment. The file systems supported include FAT, FAT32, EXT2/3/4 and NTFS. The device does not support automatic mounting, so you need to mount it manually with mount. For example, to mount a USB drive:

# create mount directory
mkdir disk
# mount
sudo mount /dev/sdb1 disk
# view the files in the USB drive
ls disk

The mounting of TF cards and PCIe SSDs is similar to that of the USB drive; the corresponding nodes are subject to the actual output of dmesg. After writing data, please use sync or umount in time, and use the sudo poweroff command when shutting down to avoid data loss.

Display

The EC-AGXOrin provides 1 HDMI2.0 display output interface (up to 4K@60Hz); the display works after the monitor is connected. It also provides 8 channels of GMSL2 interfaces, which can be connected to GMSL2 camera modules for video input.

On this page