Mo 62A Quick Start Guide¶

Table of Contents¶

1. Introduction
2. What You Need
3. Flash the SD Card
4. Hardware Setup
5. First Boot
6. Network Access
7. Camera Preview (IMX219)
8. Edge AI Inference
9. 40-Pin Expansion Header
10. Common Issues & Tips

1. Introduction¶

1.1 About Mo 62A¶

Mo 62A is a single-board computer designed for edge AI inference, machine vision, and industrial control applications. It is powered by the TI AM62A7 processor — a quad-core Arm Cortex-A53 SoC with a dedicated MMA (Matrix Multiplication Accelerator) delivering up to 2 TOPS of AI inference performance.

1.2 Key Specifications¶

Feature	Specification
SoC	TI AM62A74 (Quad-core Cortex-A53 @ 1.4 GHz + Cortex-R5F)
AI Accelerator	MMA, 2 TOPS
Memory	LPDDR4 (32-bit)
Storage	Micro SD (boot / storage)
Display	Micro HDMI (up to 1080p, via SiI9022ACNU)
Networking	1 × Gigabit Ethernet RJ45
Wireless	Wi-Fi + Bluetooth (FG6221A, U.FL antenna connector)
USB	1 × USB Type-C (power + USB 2.0), 4 × USB 2.0 Type-A
Camera	22-pin FPC CSI (4-lane MIPI CSI-2)
Audio	3.5 mm combo jack (headphone + microphone)
Expansion	40-pin header (GPIO / I2C / SPI / UART / PWM)
RTC	PCF85263ATL with battery backup connector
Fan	PWM fan connector (PWM + TACH)
Power Input	USB Type-C 5 V (≥ 3 A recommended)
LEDs	Red (Power), Green (Activity)
Debug	UART0 serial console (3-pin SH1.0 connector)
OS	Debian 13 (Trixie) with XFCE desktop

1.3 Board Layout¶

Mo 62A board

Connector / Component	Location
USB Type-C (Power + USB 2.0)	Top edge, left
4 × USB 2.0 Type-A	Top edge, right
Micro HDMI	Right edge, top
RJ45 Ethernet	Right edge, bottom
Micro SD slot	Bottom edge
40-pin expansion header	Left edge
CSI camera connector	Center, FPC
3.5 mm audio jack	Front edge
Wi-Fi / BT antenna connector	U.FL, near wireless module
Debug UART (SH1.0 3-pin)	Near USB-C
Fan connector	Near 40-pin header

2. What You Need¶

The following items are required to get started:

Item	Notes
Mo 62A board
USB Type-C power supply	5 V, ≥ 3 A
Micro SD card	≥ 16 GB, Class 10 / UHS-I (U1) or faster
Micro HDMI cable	Connect to a monitor or TV
RJ45 Ethernet cable	Required for initial network setup
Host computer	Windows, macOS, or Linux — for flashing the SD card

The following items are optional but useful:

Item	Notes
IMX219 CSI camera module
USB keyboard and mouse	For direct desktop use
3.5 mm headset	Headphone output + microphone input
CR1220 coin cell battery	For RTC backup power
Wi-Fi antenna (U.FL)	Improves wireless range significantly
PWM fan	4-pin, 5 V

3. Flash the SD Card¶

3.1 Download the Image¶

Download the latest pre-built SD card image from the release page:

The image is distributed as a .img.zip file.

The full SDK source code (kernel, device tree, filesystem customisation) is available at:

GitHub: https://github.com/inhandnet/mo-62a

3.2 Flash with balenaEtcher (Windows)¶

Download and install balenaEtcher.
Click Flash from file.

Flash from file

Select the downloaded .img.zip file.

Select image file

Click Select target.

Select target

Choose the Micro SD card from the device list.

Choose SD card

Click Flash! to start writing.

Flash

Wait until Flash Complete! is shown, then safely remove the SD card.

Flash completed

Warning: All existing data on the SD card will be erased.

4. Hardware Setup¶

Insert the SD card — push the flashed Micro SD card into the card slot on the underside of the board until it clicks.
Connect the display — plug a Micro HDMI cable into the board and connect the other end to your monitor.
Connect Ethernet — plug an RJ45 cable into the Gigabit Ethernet port for network access.
Connect peripherals — attach a USB keyboard and mouse to any of the four USB 2.0 Type-A ports (optional).
Connect the camera — if using an IMX219, connect the FPC ribbon cable to the 22-pin CSI connector (see Section 7).
Apply power — connect the USB Type-C power supply last. The red Power LED will illuminate immediately.

5. First Boot¶

5.1 Boot Sequence¶

After power is applied, the board boots from the Micro SD card. A normal boot takes approximately 30–45 seconds. The green Activity LED will blink during boot.

Note — First Boot: On the very first boot, the system automatically expands the root filesystem to fill the SD card. This takes an additional 1–2 minutes, after which the board reboots automatically. The desktop will appear after the second boot completes. Subsequent boots are normal speed.

Expected sequence:

U-Boot SPL (R5) → U-Boot (A53) — brief console output
Linux kernel decompresses and loads device tree
systemd brings up services — on first boot, filesystem expansion runs here and triggers an automatic reboot
XFCE desktop appears on the HDMI display

The XFCE desktop loads automatically. Default credentials:

Field	Value
Username	`debian`
Password	`123456`

First login only: The default password is valid for one login. You will be prompted to set a new password immediately after logging in. The new password takes effect right away.

5.3 Serial Console (UART0 Debug Port)¶

If no display is available, the board can be accessed via the 3-pin UART0 debug connector (SH1.0, 1.0 mm pitch).

Pin	Signal
1	RXD
2	TXD
3	GND

Serial settings: 115200 baud, 8N1, no flow control

# Linux host example (replace /dev/ttyUSB0 with your adapter's device node)
minicom -D /dev/ttyUSB0 -b 115200

6. Network Access¶

6.1 Wired Ethernet¶

The board obtains an IP address via DHCP automatically on boot.

6.2 Find the Board's IP Address¶

From the XFCE desktop terminal:

ip addr show eth0

From a host on the same network (if mDNS is enabled):

1	`ping mo-62a.local`

ssh debian@<board-ip>
# or
ssh [email protected]

6.4 Wi-Fi Setup¶

Connect to a Wi-Fi network using nmcli:

# List available networks
nmcli device wifi list

# Connect to a network
nmcli device wifi connect "SSID" password "password"

Alternatively, use the XFCE network manager applet in the system tray.

Note: A U.FL antenna connector is provided on the board. Attaching an external antenna significantly improves wireless range.

7. Camera Preview (IMX219)¶

The Mo 62A supports the IMX219 CSI camera module (Sony IMX219) via the 22-pin FPC CSI connector.

7.1 Connect the Camera¶

Gently lift the FPC connector latch on the CSI port.
Insert the ribbon cable with the contacts facing the board (metal contacts down).
Press the latch down to lock the cable.

7.2 Run the Preview¶

The imx219-preview.sh script is pre-installed at /usr/local/bin/imx219-preview.sh.

# Basic preview at 15 fps (default)
sudo imx219-preview.sh

# Preview at 30 fps
sudo imx219-preview.sh 30

# Low-light mode (maximum gain and exposure at 5 fps)
sudo GAIN=232 imx219-preview.sh 5

The preview displays live video on the HDMI output. Press Ctrl+C to exit.

Note: The script requires root (sudo) because kmssink needs DRM master access. Any running desktop session (lightdm) is stopped automatically while the preview is running and restarted on exit.

7.3 Tuning Options¶

Variable	Default	Range	Description
`FPS`	`15`	5/8/10/15/30	Frame rate (passed as first argument)
`WB_R`	`0.5`	0.0 – 1.0	White-balance red channel reference
`WB_B`	`0.6`	0.0 – 1.0	White-balance blue channel reference
`GAIN`	`150`	0 – 232	Analogue gain (increase for low-light conditions)
`DGAIN`	`256`	256 – 4095	Digital gain (higher values increase noise)
`EXPOSURE`	auto	lines	Exposure lines (defaults to maximum for chosen FPS)

Example — warmer white balance at 10 fps:

sudo WB_R=0.4 WB_B=0.5 imx219-preview.sh 10

8. Edge AI Inference¶

The Mo 62A carries a TI C7x DSP that hardware-accelerates edge AI inference (TIDL). The image ships with a model zoo, the inference runtimes, and a complete C/C++ development SDK — so you can run demos out of the box and compile and debug your own inference programs directly on the board.

8.1 Run the Inference Demo (edgeai-demo)¶

edgeai-demo is a single entry point that drives both the Python and C/C++ backends, with either a CSI or USB camera, from the same config.

Interactive mode (pick camera → model → backend in turn):

1	`edgeai-demo`

Command-line mode:

edgeai-demo list                                   # list available models
edgeai-demo run 2 --backend cpp    --camera csi    # C/C++ backend + CSI camera
edgeai-demo run 2 --backend python --camera usb    # Python backend + USB camera
edgeai-demo status                                 # show the active camera

The inference view (with detection boxes and a performance graph) is shown on the HDMI output; press Ctrl+C to exit.

Note: initialise a CSI camera first with sudo init-imx219. edgeai-demo handles root privileges, environment variables, the C7x reset, and stopping/ restoring the desktop (lightdm) automatically — no manual steps are needed.

8.2 Develop Your Own C/C++ AI Program On-Board¶

The image ships with a complete C/C++ AI SDK, so you can compile your own inference programs directly on the board with no cross-compilation setup:

Item	Location
Headers	`/usr/include/edgeai/`
Libraries + CMake package	`/usr/lib/edgeai/`, `/usr/lib/cmake/EdgeAI/`
Example projects	`/usr/share/edgeai-cpp-examples/`
Model zoo	`/opt/model_zoo/`
Developer guide	`/usr/share/edgeai-cpp-examples/DEV_GUIDE.md`

A single CMakeLists.txt links the whole SDK (no manual include/library paths):

find_package(EdgeAI REQUIRED)
add_executable(my_infer main.cpp)
target_link_libraries(my_infer PRIVATE EdgeAI::edgeai)

Build and run the minimal example (loads a model and runs one inference, no camera needed):

cp -r /usr/share/edgeai-cpp-examples/hello_inference ~/hello_inference
cd ~/hello_inference && mkdir build && cd build
cmake .. && make
sudo LD_LIBRARY_PATH=/opt/ti/edgeai/lib ./hello_inference \
     -m /opt/model_zoo/ONR-OD-8200-yolox-nano-lite-mmdet-coco-416x416

Inference OK. confirms the model ran on the C7x DSP. A full camera → inference → HDMI pipeline example is in /usr/share/edgeai-cpp-examples/app_edgeai/; see DEV_GUIDE.md for the API and more details.

9. 40-Pin Expansion Header¶

The 40-pin expansion header provides GPIO signals at 3.3 V logic levels. All user-accessible signal pins default to GPIO mode. Optional peripheral functions (I2C, SPI, UART, PWM) can be enabled via device tree overlay.

Note: Pins 27/28 (I2C2) are permanently assigned to the internal I2C bus used by the camera module and cannot be used as general GPIO.

9.1 Pin Map¶

40-pin header

See the complete 40-pin table in Section 8.2 below.

9.2 Linux GPIO Reference¶

All 40 pins are listed below. Use gpioset / gpioget from the gpiod package for GPIO-mode pins.

Pin	Name	Default Function	gpiochip	Line	Optional Function
1	3V3	3.3 V power	—	—	—
2	5V	5 V power	—	—	—
3	GPIO2	GPIO (MCU_GPIO0_20)	gpiochip0	20	WKUP_I2C0_SDA
4	5V	5 V power	—	—	—
5	GPIO3	GPIO (MCU_GPIO0_19)	gpiochip0	19	WKUP_I2C0_SCL
6	GND	Ground	—	—	—
7	GPIO4	GPIO (GPIO0_39)	gpiochip1	39	—
8	GPIO14	GPIO (GPIO1_25)	gpiochip2	25	UART5_TXD
9	GND	Ground	—	—	—
10	GPIO15	GPIO (GPIO1_24)	gpiochip2	24	UART5_RXD
11	GPIO17	GPIO (GPIO1_23)	gpiochip2	23	—
12	GPIO18	GPIO (GPIO1_0)	gpiochip2	0	MCASP2_ACLKX
13	GPIO27	GPIO (GPIO0_42)	gpiochip1	42	—
14	GND	Ground	—	—	—
15	GPIO22	GPIO (GPIO1_22)	gpiochip2	22	—
16	GPIO23	GPIO (GPIO0_38)	gpiochip1	38	—
17	3V3	3.3 V power	—	—	—
18	GPIO24	GPIO (GPIO0_40)	gpiochip1	40	—
19	GPIO10	GPIO (GPIO1_18)	gpiochip2	18	SPI0_D0 (MOSI)
20	GND	Ground	—	—	—
21	GPIO9	GPIO (GPIO1_19)	gpiochip2	19	SPI0_D1 (MISO)
22	GPIO25	GPIO (GPIO0_14)	gpiochip1	14	—
23	GPIO11	GPIO (GPIO1_17)	gpiochip2	17	SPI0_CLK
24	GPIO8	GPIO (GPIO1_15)	gpiochip2	15	SPI0_CS0
25	GND	Ground	—	—	—
26	GPIO7	GPIO (GPIO1_16)	gpiochip2	16	SPI0_CS1
27	I2C2_SDA	I2C2 SDA (`i2c-2`)	—	—	(camera bus, fixed)
28	I2C2_SCL	I2C2 SCL (`i2c-2`)	—	—	(camera bus, fixed)
29	GPIO5	GPIO (GPIO0_36)	gpiochip1	36	—
30	GND	Ground	—	—	—
31	GPIO6	GPIO (GPIO0_33)	gpiochip1	33	—
32	GPIO12	GPIO (GPIO1_14)	gpiochip2	14	EHRPWM0_B
33	GPIO13	GPIO (GPIO1_13)	gpiochip2	13	EHRPWM0_A
34	GND	Ground	—	—	—
35	GPIO19	GPIO (GPIO0_91)	gpiochip1	91	MCASP2_AFSX
36	GPIO16	GPIO (GPIO1_9)	gpiochip2	9	EHRPWM1_A
37	GPIO26	GPIO (GPIO0_41)	gpiochip1	41	—
38	GPIO20	GPIO (GPIO1_5)	gpiochip2	5	MCASP2_AXR0
39	GND	Ground	—	—	—
40	GPIO21	GPIO (GPIO1_2)	gpiochip2	2	MCASP2_AXR1

gpiochip0 = mcu_gpio0 (MCU domain). gpiochip1 = main_gpio0 (GPIO0_x). gpiochip2 = main_gpio1 (GPIO1_x).

9.3 Voltage Levels¶

All expansion header I/O pins operate at 3.3 V. Do not connect 5 V signals directly to GPIO pins.

9.4 Quick Examples¶

The board ships with libgpiod v2.x. The -c flag is required to specify the chip.

List all GPIO chips:

1	`gpiodetect`

Read a GPIO input (example: Pin 11 / BCM GPIO23 → gpiochip2 line 23):

gpioget -c gpiochip2 23
# Output: "23"=active  (active = high, inactive = low)

Read multiple pins at once:

gpioget -c gpiochip1 39 42
gpioget -c gpiochip2 23
# Output: "39"=active "42"=active

Drive a pin high and hold (example: Pin 7 / BCM GPIO4 → gpiochip1 line 39):

# Run in the background — the pin stays driven until the process is killed
gpioset -c gpiochip1 39=1 &

# Release the pin (restores to input)
pkill gpioset

Drive a pin for a fixed duration, then release:

# Hold high for 2 seconds, then exit automatically
gpioset --hold-period=2s -c gpiochip1 39=1

Toggle a pin repeatedly (example: 500 ms high → 500 ms low → exit):

gpioset -t 500ms,500ms,0 -c gpiochip1 39=1

Monitor pin edges (example: Pin 11 → gpiochip2 line 23):

gpiomon -c gpiochip2 23           # both edges
gpiomon --edges=rising -c gpiochip2 23

Scan I2C2 bus (pins 27/28, /dev/i2c-2):

i2cdetect -y 2

SPI loopback test (short Pin 19 MOSI ↔ Pin 21 MISO, CS0 = Pin 24):

Prerequisites: 1. Boot with the microSD-periph extlinux entry (40-pin peripheral mode overlay enabled) 2. Install python3-spidev: sudo apt-get install -y python3-spidev

sudo python3 - <<'EOF'
import spidev, sys

spi = spidev.SpiDev()
spi.open(0, 0)           # spi0, CS0
spi.max_speed_hz = 1_000_000
spi.mode = 0

tx = [0xAA, 0x55, 0x12, 0x34, 0xDE, 0xAD, 0xBE, 0xEF]
rx = spi.xfer2(tx)
spi.close()

print(f"TX: {[hex(b) for b in tx]}")
print(f"RX: {[hex(b) for b in rx]}")
if tx == rx:
    print("PASS: loopback data matches")
else:
    print("FAIL: data mismatch")
    sys.exit(1)
EOF

Verify device nodes are present after booting in peripheral mode:

ls /dev/spidev*          # expect: /dev/spidev0.0
ls /sys/bus/spi/devices/ # expect: spi0.0

10. Common Issues & Tips¶

Screen Stays Blank After Boot¶

The image ships with DPMS (display power management) disabled by default. If the screen goes blank, press any key or move the mouse to check whether the display manager is still running. If the issue persists, verify:

cat /etc/X11/xorg.conf.d/10-no-dpms.conf
grep xserver-command /etc/lightdm/lightdm.conf

Camera Not Detected¶

# Check that the CSI capture device is present
v4l2-ctl --list-devices

# Check media pipeline topology
media-ctl -d /dev/media0 --print-topology

If the camera is not listed, verify that the FPC cable is fully seated in the connector and the latch is locked.

SD Card Not Found at Boot¶

Ensure the SD card is fully inserted (it should click into place).
Try a different card. Cards smaller than 16 GB or slower than Class 10 may not work reliably.
Re-flash the image and verify the write completed without errors.

Wi-Fi Antenna¶

The on-board U.FL connector requires an external antenna for reliable Wi-Fi performance. Without an antenna, range will be very limited.