I am trying to run some Python control of I2C devices on the Pocket Beagle (PB) that already run on the BBB (Rev C).
So, I set up the following comparison: ---------------------------------------------------------------- Load fresh "bone-debian-9.2-iot-armhf-2017-10-10-4gb.img" on the BBB Rev.C Linux beaglebone 4.4.91-ti-r133 #1 SMP Tue Oct 10 05:18:08 UTC 2017 armv7l GNU/Linux sudo apt update sudo apt install python-smbus python3-smbus i2cdetect -y -r 2 # reveals target part at bus 2, addr = 0x18 python2 >>> import smbus >>> b = smbus.SMBus(2) >>> print b.read_word_data(0x18,0x06) 21504 # expected result (Manufacturer ID for MPC9808 temp sensor) python3 >>> import smbus >>> b = smbus.SMBus(2) >>> print (b.read_word_data(0x18,0x06)) 21504 # expected result (Manufacturer ID for MPC9808 temp sensor) ---------------------------------------------------------------- Load fresh "bone-debian-9.2-iot-armhf-2017-10-15-4gb.img" on the PB. Linux beaglebone 4.4.91-ti-r133 #1 SMP Tue Oct 10 05:18:08 UTC 2017 armv7l GNU/Linux i2cdetect -y -r 2 # reveals target part at bus 2, addr = 0x18 sudo apt update sudo apt install python-smbus python3-smbus python >>> import smbus >>> b = smbus.SMBus(2) >>> print(b.read_word_data(0x18,0x06)) Traceback (most recent call last): File "<stdin>", line 1, in <module> IOError: [Errno 121] Remote I/O error python3 >>> import smbus >>> b = smbus.SMBus(2) >>> print(b.read_word_data(0x18,0x06)) Traceback (most recent call last): File "<stdin>", line 1, in <module> OSError: [Errno 121] Remote I/O error The only thing unique about this PB is that I am using a USB-2 to Ethernet interface for SSH access on USB1 port. Driver is already included in the kernel/img. Should not have any impact on I2C operation. I2C is not used by the Ethernet, just USB. ---------------------------------------------------------------- -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/1a7085c5-4d8b-4903-9dbc-386fc0744163%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
