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/4ddb5659-5513-4ed6-a282-6ed727b9173an%40googlegroups.com.
