The eeprom probably is a device, not a filesystem. Use dd instead. /Sven tisdag 29 september 2020 kl. 17:59:14 UTC+2 skrev Johan Lind:
> I tried with only a short (6 bytes) string but still the same behaviour. > > > tisdag 29 september 2020 kl. 17:45:47 UTC+2 skrev robert.sty...@gmail.com: > >> I suggest trying to write less than 32 bytes (the dmesg implies something >> wrong with offset or count) -- create a file of less than 32 bytes and copy >> to eeprom >> cd ~ >> echo "1234567890" > file10 >> cp -T file10 /sys/bus/w1/devices/23-000002eddd9b/eeprom >> >> In the data sheet you need a much smaller R[PU] to write than read >> https://datasheets.maximintegrated.com/en/ds/DS2433.pdf >> >> On Tuesday, 29 September 2020 at 16:03:48 UTC+1 RobertCNelson wrote: >> >>> On Tue, Sep 29, 2020 at 9:55 AM 'Johan Lind' via BeagleBoard >>> <beagl...@googlegroups.com> wrote: >>> > >>> > Yes, it does still show eeprom >>> > >>> > debian@beaglebone:~$ ls /sys/bus/w1/devices/23-000002eddd9b >>> > driver eeprom id name power subsystem uevent >>> > debian@beaglebone:~$ ls /sys/bus/w1/devices/ >>> > 23-000002eddd9b w1_bus_master1 >>> > debian@beaglebone:~$ >>> > debian@beaglebone:~$ ls -al /sys/bus/w1/devices/23-000002eddd9b/ >>> > total 0 >>> > drwxrwxr-x 3 root gpio 0 Sep 29 14:00 . >>> > drwxrwxr-x 4 root gpio 0 Sep 29 14:00 .. >>> > lrwxrwxrwx 1 root gpio 0 Sep 29 14:00 driver -> >>> ../../../bus/w1/drivers/w1_slave_driver >>> > -rw-rw-r-- 1 root gpio 512 Sep 29 14:07 eeprom >>> >>> Side note, you don't' have to be root, the "gpio" group is the default >>> for debian.. >>> >>> > -r--r--r-- 1 root gpio 4096 Sep 29 14:00 id >>> > -r--r--r-- 1 root gpio 4096 Sep 29 14:00 name >>> > drwxrwxr-x 2 root gpio 0 Sep 29 14:00 power >>> > lrwxrwxrwx 1 root gpio 0 Sep 29 14:00 subsystem -> ../../../bus/w1 >>> > -rw-rw-r-- 1 root gpio 4096 Sep 29 14:00 uevent >>> > debian@beaglebone:~$ >>> >>> not sure why you can't write... >>> >>> 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/69f994ba-cbbd-4680-840a-a353be874be9n%40googlegroups.com.
