Hi all,
This is first time I am using Beaglebone black for a development. I am using Beaglebone Black RevC with Debian Jessie image. I want an application "shaft_cam" to run at bootup of BBB. For that I created a .service file in /lib/systemd/system/ folder. [Unit] Description=Shaft Cam [Service] WorkingDirectory=/root/ ExecStart=/root/./start.sh SyslogIdentifier=shaft_cam Restart=on-failure RestartSec=5 [Install] WantedBy=multi-user.target And my start.sh contains the following #!/bin/bash #sudo su -c "echo BB-UART4 > /sys/devices/platform/bone_capemgr/slots" #sudo sh -c "echo BB-I2C1 > /sys/devices/platform/bone_capemgr/slots" echo 44 > /sys/class/gpio/export echo 45 > /sys/class/gpio/export echo 23 > /sys/class/gpio/export echo 26 > /sys/class/gpio/export echo 47 > /sys/class/gpio/export echo 46 > /sys/class/gpio/export echo 27 > /sys/class/gpio/export echo 65 > /sys/class/gpio/export echo 22 > /sys/class/gpio/export echo 49 > /sys/class/gpio/export /root/./shaft_cam So in my start.sh, adding BB-UART4 overlay is done, before calling shaft_cam. But after restart shaft_cam is executed, but UART4 is not working. But at the same time when I examine the folder /sys/devices/platform/bone_capemgr/, slot-4 (for BB-UART4) and slot-5(BB-I2C1) exists there. This is happening at every power up. That is the shaft_cam which includes UART4 operation is running(as indicated by LEDs), but UART4 operation is not happening. After booting is completed, if I kill shaft_cam, and run it in one terminal with the command ./shaft_cam, everything is working (without any other changes). After restart only UART4 operations are not working. Stopping it and invoking from a terminal everything including UART4 operations are working. When I captured bootup messages through Putty, I observed the following (the messages are given in the attached file BOOTUP MESSAGE.docx ) BB-UART4 capemgr is executed after shaft_cam (as seen in BOOTUP MESSAGE.docx) Whether UART4 is not working at bootup because of this ? If so how can I make capemgr executed before shaft_cam ? Thanks & Regards, Sajeevan.K -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/979889b8-7c13-4b95-870b-fbd70890eb2b%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
BOOTUP MESSAGE.docx
Description: MS-Word 2007 document
