[FAQ] TDA4VM: Starting openVX application automatically at Linux boot

In order to start an OpenVX application automatically during Linux boot, you could call the application in a service.

Please follow the below steps to achieve this

Step 1: Boot the EVM and login as 'root'

Step 2: Create a shell script in which you call the executable for your application along with its dependencies

(A sample shell script (appl.sh) is as shown below which loads the TIDL demo)

/cfs-file/__key/communityserver-discussions-components-files/1132/1856.appl.sh

Step 3: Save this shell script in /etc/init.d/

Step 4: Create a Systemd Unit File in /lib/systemd/system/ as shown below

sudo vi /lib/systemd/system/application.service

Step 5: Add the following contents and save the file

[Unit] Description=My Shell Script

[Service] ExecStart=/etc/init.d/appl.sh

[Install] WantedBy=multi-user.target

Step 6: Enable the new service as shown below

sudo systemctl daemon-reload

sudo systemctl enable application.service

sudo systemctl start application.service

Step 7: Verify the script is up and running with the below command

sudo systemctl status application.service

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The output should look like below

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* application.service - My Shell Script
     Loaded: loaded (/lib/systemd/system/application.service; enabled; vendor preset: disabled)
     Active: active (running) since Tue 2022-08-30 11:43:32 UTC; 11min ago
   Main PID: 697 (appl.sh)
      Tasks: 9 (limit: 16491)
     Memory: 45.4M
     CGroup: /system.slice/application.service
             |-697 /bin/sh /etc/init.d/appl.sh
             |-698 /opt/vision_apps/vx_app_arm_remote_log.out
             `-746 /opt/vision_apps/vx_app_tidl.out --cfg /opt/vision_apps/app_oc.cfg

Aug 30 11:43:33 j721s2-evm appl.sh[698]: [C7x_1 ]    702.612181 s: APP: Run ... Done !!!
Aug 30 11:43:33 j721s2-evm appl.sh[698]: [C7x_1 ]    702.613379 s: IPC: Echo status: mpu1_0[x] mcu2_0[x] mcu2_1[x] C7X_1[s] C7X_2[P]
Aug 30 11:43:33 j721s2-evm appl.sh[698]: [C7x_1 ]    702.625081 s: IPC: Echo status: mpu1_0[x] mcu2_0[x] mcu2_1[P] C7X_1[s] C7X_2[P]
Aug 30 11:43:33 j721s2-evm appl.sh[698]: [C7x_1 ]    702.666312 s: IPC: Echo status: mpu1_0[x] mcu2_0[P] mcu2_1[P] C7X_1[s] C7X_2[P]
Aug 30 11:43:33 j721s2-evm appl.sh[698]: [C7x_2 ]    693.963430 s: CIO: Init ... Done !!!
Aug 30 11:43:33 j721s2-evm appl.sh[698]: [C7x_2 ]    693.963445 s: ### CPU Frequency = 1000000000 Hz
Aug 30 11:43:33 j721s2-evm appl.sh[698]: [C7x_2 ]    693.963456 s: APP: Init ... !!!
Aug 30 11:43:33 j721s2-evm appl.sh[698]: [C7x_2 ]    693.963464 s: SCICLIENT: Init ... !!!
Aug 30 11:43:33 j721s2-evm appl.sh[698]: [C7x_2 ]    693.963584 s: SCICLIENT: DMSC FW version [8.4.1--v08.04.01 (Jolly Jellyfi]
Aug 30 11:43:33 j721s2-evm appl.sh[698]: [C7x_2 ]    693.963599 s: SCICLIENT: DMSC FW revision 0x8

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Step 8: Reboot the EVM and your OpenVX application automatically runs during Linux boot

Regards,
Nikhil