Those are the steps I have followed:
1. I flashed Debian 8.5 (http://elinux.org/Beagleboard:BeagleBon ... GB_eMMC.29) to eMMc
2. Follow this tutorial to install the IO Python library: https://learn.adafruit.com/setting-up-i ... -on-ubuntu
3. Follow this tutorial to test the BMP180: https://learn.adafruit.com/using-the-bm ... rything-up
And, when I run "sudo python simpletest.py" I get the following error:
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Traceback (most recent call last):
File "simpletest.py", line 37, in <module>
sensor = BMP085.BMP085()
File "build/bdist.linux-armv7l/egg/Adafruit_BMP/BMP085.py", line 69, in __init__
File "build/bdist.linux-armv7l/egg/Adafruit_BMP/BMP085.py", line 72, in _load_calibration
File "build/bdist.linux-armv7l/egg/Adafruit_GPIO/I2C.py", line 200, in readS16BE
File "build/bdist.linux-armv7l/egg/Adafruit_GPIO/I2C.py", line 177, in readS16
File "build/bdist.linux-armv7l/egg/Adafruit_GPIO/I2C.py", line 164, in readU16
File "build/bdist.linux-armv7l/egg/Adafruit_PureIO/smbus.py", line 173, in read_word_data
IOError: [Errno 110] Connection timed out
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Traceback (most recent call last):
File "simpletest.py", line 40, in <module>
sensor = BMP085.BMP085(busnum=2)
File "build/bdist.linux-armv7l/egg/Adafruit_BMP/BMP085.py", line 69, in __init__
File "build/bdist.linux-armv7l/egg/Adafruit_BMP/BMP085.py", line 72, in _load_calibration
File "build/bdist.linux-armv7l/egg/Adafruit_GPIO/I2C.py", line 200, in readS16BE
File "build/bdist.linux-armv7l/egg/Adafruit_GPIO/I2C.py", line 177, in readS16
File "build/bdist.linux-armv7l/egg/Adafruit_GPIO/I2C.py", line 164, in readU16
File "build/bdist.linux-armv7l/egg/Adafruit_PureIO/smbus.py", line 173, in read_word_data
IOError: [Errno 121] Remote I/O error
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GND to P9.1
Vin to P9.3
SCL to P9.19
SDA to P9.20
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The voltages are alright:
5.22V at Vin
2.50V at SCL
2.50V at SDA
1. Should I install some other distribution of debian or any other kernel?
2. Which version is the one used in https://learn.adafruit.com/setting-up-i ... -on-ubuntu by Justin Cooper?
3. The 0x77 is always "--" on every i2c bus (it doesn't matter if the sensor is psychically connected or not). I didn't applied any Device Tree Overlay. Is this the problem? How can I apply the right one?
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root@beaglebone:~# uname -a
Linux beaglebone 4.4.11-ti-r29 #1 SMP Fri May 27 22:58:36 UTC 2016 armv7l GNU/Linux
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root@beaglebone:~# dmesg | grep i2c
[ 1.521813] omap_i2c 44e0b000.i2c: could not find pctldev for node /ocp/l4_wkup@44c00000/scm@210000/pinmux@800/pinmux_i2c0_pins, deferring probe
[ 1.521861] omap_i2c 4819c000.i2c: could not find pctldev for node /ocp/l4_wkup@44c00000/scm@210000/pinmux@800/pinmux_i2c2_pins, deferring probe
[ 2.101447] i2c /dev entries driver
[ 2.220718] input: tps65217_pwr_but as /devices/platform/ocp/44e0b000.i2c/i2c-0/0-0024/input/input0
[ 2.246522] omap_i2c 44e0b000.i2c: bus 0 rev0.11 at 400 kHz
[ 2.249378] omap_i2c 4819c000.i2c: bus 2 rev0.11 at 100 kHz
[ 26.827916] omap_i2c 4802a000.i2c: bus 1 rev0.11 at 100 kHz
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root@beaglebone:~# i2cdetect -l
i2c-0 i2c OMAP I2C adapter I2C adapter
i2c-1 i2c OMAP I2C adapter I2C adapter
i2c-2 i2c OMAP I2C adapter I2C adapter
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root@beaglebone:~# i2cdetect -y -r 0
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- UU -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- 34 -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: UU -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
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root@beaglebone:~# 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: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
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root@beaglebone:~# i2cdetect -y -r 2
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: -- -- -- -- -- -- -- --
Thank you very much for your help!