Hello,
I configured 2 armbian on sd card and the configuration of the i2c is the same in armbianEnv.txt. Plattform Olimex-Lime2 A20
verbosity=1
logo=disabled
console=both
disp_mode=1280x1024p50
overlay_prefix=sun7i-a20
rootdev=UUID=194e9f9a-826b-4644-9f2f-4ef388277816
rootfstype=ext4
overlays=i2c1 i2c2 uart3
usbstoragequirks=0x2537:0x1066:u,0x2537:0x1068:u
as you see, I confiugred the overlays.
But on one image I get:
#image with desktop
sudo i2cdetect -l
i2c-3 i2c mv64xxx_i2c adapter I2C adapter
i2c-1 i2c mv64xxx_i2c adapter I2C adapter
i2c-2 i2c mv64xxx_i2c adapter I2C adapter
and booting the other image I get
# headless image
sudo i2cdetect -l
i2c-3 i2c mv64xxx_i2c adapter I2C adapter
i2c-1 i2c mv64xxx_i2c adapter I2C adapter
i2c-2 i2c mv64xxx_i2c adapter I2C adapter
i2c-0 i2c sun4i_hdmi_i2c adapter I2C adapter
so I get an aditional device for i2c-0.
I don't understand what's happening. What could cause this effect? Or better: What must happen, that the i2c-0 does not appear in the list.
One more info: The first image has a runing desktop and the second one in headless. Maybe this has something to do with the issue?
Can someone give me a pointer to understand this. Btw. both versions work perfekt:
i2cdetect -y 2
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: 20 21 -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- UU -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
i2cdetect -y 3
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: 20 21 -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- UU -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
The 0x68 is a RTC which is configured. So everything is OK, but I drives me crazy not to understand what I've done "wrong". Can someone give me a pointer?
Thanks for all help.
