Under 3.8.13:
uname -r
3.8.13-bone77
sudo i2cdetect -l
i2c-0 i2c OMAP I2C adapter I2C adapter
i2c-1 i2c OMAP I2C adapter I2C adapter
Under 4.1.115:
uname -r
4.1.15-bone17
sudo i2cdetect -l
i2c-0 i2c OMAP I2C adapter I2C adapter
i2c-2 i2c OMAP I2C adapter I2C adapter
Has the I2C smbus at address 1 changed to address 2 as indicated by the second ‘2’ in i2c-2i2c? I’m assuming this is the second I2C bus at
pins P9_19 and P9_20? If so, would anyone know why?
Back in 4.1.15 with a cape attached:
sudo i2cdetect -y -r 2
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: – – – – – – – – – – – – –
10: – – – – – – – – – – – – – – – –
20: 20 – – – – – – – – – – – – – – –
30: – – – – – – – – – – – – – – – –
40: – – – – – – – – 48 – – – – – – –
50: – – – – UU UU UU UU – – – – – – – –
60: – – – – – – – – 68 – – – – – – –
70: 70 – – – – – – –
and in 3.8.13 with no cape:
sudo i2cdetect -y -r 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: – – – – – – – – – – – – –
10: – – – – – – – – – – – – – – – –
20: – – – – – – – – – – – – – – – –
30: – – – – – – – – – – – – – – – –
40: – – – – – – – – – – – – – – – –
50: – – – – UU UU UU UU – – – – – – – –
60: – – – – – – – – – – – – – – – –
70: – – – – – – – –
The similarity is enough to make me think the bus address has changed?