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: $ 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 To me the error looks like the device doesn't have a write function implemented, however looking at the source it looks like it does. $ dmesg | grep w1 [2329228.747219] w1_master_driver w1_bus_master1: Attaching one wire slave 23.000002eddd9b crc c8 [2493821.327176] w1_slave_driver 23-000002eddd9b: invalid offset/count off=0 cnt=140 [2514308.615437] w1_slave_driver 23-000002eddd9b: invalid offset/count off=0 cnt=140 Is there some kind of write protect that needs to be handled? Is the w1 system capable of writing to a DS2433 eeprom? Should I rather try using owfs? -- 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/b7776b8b-38aa-4f70-8fe0-8a494ef2cfceo%40googlegroups.com.
