Thank you (and sorry for the double post) ! However, I still have no luck writing to the eeprom.
I have tried a couple of variations of the commands but I get error even if logged in as root. debian@beaglebone:/sys/bus/w1/devices/23-000002eddd9b$ sudo sh -c "echo 'cat /home/debian/file' > eeprom" sh: 1: echo: echo: I/O error debian@beaglebone:/sys/bus/w1/devices/23-000002eddd9b$ su Password: root@beaglebone:/sys/bus/w1/devices/23-000002eddd9b# echo 'cat /home/debian/file' > eeprom bash: echo: write error: Invalid argument root@beaglebone:/sys/bus/w1/devices/23-000002eddd9b# cat /home/debian/file > eeprom cat: write error: Invalid argument root@beaglebone:/sys/bus/w1/devices/23-000002eddd9b# exit exit debian@beaglebone:/sys/bus/w1/devices/23-000002eddd9b$ sudo cp -T /home/debian/file eeprom cp: error writing 'eeprom': Invalid argument fredag 25 september 2020 kl. 17:52:55 UTC+2 skrev robert.sty...@gmail.com: > Also the copy command > cp -T *source* *destination* > so... > sudo cp -T /home/debian/file eeprom > > On Friday, 25 September 2020 at 16:48:24 UTC+1 robert.sty...@gmail.com > wrote: > >> Wasn't the problem that the redirection of output by ">" was outside the >> sudo *command* >> The "echo" is not needed, only >> sudo sh -c "cat /home/debian/file > eeprom" >> >> On Friday, 25 September 2020 at 15:59:06 UTC+1 RobertCNelson wrote: >> >>> On Fri, Sep 25, 2020 at 9:48 AM johan.lind via BeagleBoard >>> <beagl...@googlegroups.com> wrote: >>> > >>> > I would need some help to understand why I can't write to an DS2433 >>> eeprom. >>> > >>> > System information: >>> > BBB Industrial board >>> > Debian 10 (Buster IoT Image 2020-04-06) >>> > Hardware attached are DS2482 i2c to w1 interface and DS2433 eeprom. >>> > >>> > Commands executed to set-up system: >>> > $ modprobe ds2482 >>> > $ echo ds2482 0x18 > /sys/bus/i2c/devices/i2c-1/new_device >>> > $ modprobe wire >>> > >>> > I can read the eeprom by executing >>> > $ cd /sys/bus/w1/devices/23-000002eddd9b >>> > $ cat eeprom | hexdump >>> > >>> > Getting this far I assume hardware is correct and drivers are loaded >>> correctly. >>> > >>> > debian@beaglebone:/sys/bus/w1/devices/23-000002eddd9b$ ls >>> > driver eeprom id name power subsystem uevent >>> > >>> > Should here be a directory called w1_slave? >>> > I see such a directory on some web pages searching for similar >>> problems with w1. >>> > >>> > Now to the problem. >>> > Executing the following command will fail: >>> > debian@beaglebone:/sys/bus/w1/devices/23-000002eddd9b$ sudo cat >>> /home/debian/file > eeprom >>> > [sudo] password for debian: >>> > cat: write error: Invalid argument >>> >>> https://elinux.org/Beagleboard:BeagleBoneBlack_Debian#Privileged_echo >>> >>> sudo sh -c "echo 'cat /home/debian/file' > eeprom" >>> >>> Regards, >>> >>> -- >>> Robert Nelson >>> https://rcn-ee.com/ >>> >> -- 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/6a4bf2f0-522c-4e18-8846-7dcc0ab989b4n%40googlegroups.com.
