Hi!
I solved the problem, but still don't understand the source of the error.
that's what I did:
1. connected the sensor to PI15 without any modifying dts/dtb, as i wrote in previous post. result - negative.
2. modified dts/dtb to define PI16 as w1_bus_master, according to nkahl's manual (great thanks to him!). I received two directories w1_bus_master1 and w1_bus_master2 and up to five directories like 00-хх000000000 but nothing like real sensor response
3. a lot of thought...
4. hooked up saleae logic analyzer to PI16 to see how bus master seaches slaves - nothing activity! on one side, I've seen messages in dmesg where bus_master is searching slaves, on other side - no any signal on pin
5. a lot of thought... again
6. exported PG0 as gpio output, test with "echo 1 > ... echo 0 > ..." - everything worked, did the same with PI16 - nothing worked. system executed my commands without any effect in real. I wrote value "1", then read it - really "1", but real state of the pin was LOW.
7. a little thought
8. modified dts/dtb to define PG0 as w1_bus_master, connected sensor and..... BLISS!!!!! I finally found out the temperature in the room
in fact i understood that must avoid using pins PIxx
I have two proposals about this abnormality 1) it is a little bug in armbian (or, may be, an unknown to me feature) 2) hardware error, however my cubieboard is absolutely new
I will be glad to hear any comments
