VKSDK-MODBUS

This codebase was designed to incorporate the vkl-m12 system along with a radxa zero 3w. UART4 is assumed to be used as well GPIO pin 113 (gpiochip 3 pin 17).

Setup

1. Install vk-system.

2. Edit vkl-m12-color_arm.json file. Edit path to blob file

   "blob_path": "<path_to_yolov8s_openvino_2022.1_7shave.blob>",
   

3. Install dependencies

   sudo apt install libgpiod-dev
   

4. Set up UART4 on Radxa zero 3w

   sudo armbian-add-overlay rk356x-uart4-m1.dts
   sudo reboot now
   

ttyS4 should now be listed under /dev/

Compiling

mkdir build && cd build
cmake ..
make

Running the program

1. Start camera driver using the config file "vkl-m12-color_arm.json"
2. Run sudo ./main <modbus_id> e.g. sudo ./main 10

Reading from modbus

MODBUS RTU PROTOCOL

Field	Value
Baudrate	115200
Databits	8
Parity	even
Input register data type	16-bits
Modbus ID	user defined
Input register	1 - Detection, "1" for target detected "0" for no target detected 2 - Heartbeat of camera driver, "1" for camera driver heart beat received, "0" for no heartbeat received

**When there is no heartbeat received from camera driver, Detection value should be thrown away.

Operating System used

Linux radxa-zero3 6.1.43-vendor-rk35xx #1 SMP Thu Jun 20 10:33:36 UTC 2024 aarch64 GNU/Linux

Distributor ID: Debian Description: Armbian 24.5.3 bookworm Release: 12 Codename: bookworm