[wilsonh]

I wrote a python script to switch the multiplexer to the correct bioreactor manually and then took apart the reactor and manually supplied 3.3V to where the regulator should have been giving it. After running i2cdetect -y -r 2 and I was able to see two other devices:

root@beaglebone:~# i2cdetect -y -r 2
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- 1b -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: 60 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: 70 -- -- -- 74 -- -- --

I am now just trying to figure out if the 0x60 and 0x70 I am seeing are valid, I’m thinking that the the 0x60 is the (PCA9685) PWM chip and I cannot figure out what the B1 is on the PCB, but maybe that is the other one? The zip on the website that contains the PCB files are all V1.0, while my bioreactor is V1.2. Would I be able to get the updated files in a .zip so that I could know what these parts are?

Also, a weird thing that I am running into is after attempting to run bash cb.sh and it failing the no I2C device works until I unplug the beagle bone and re-power it back up. Must be that when I CTRL-C some master device is holding onto the bus? Any ideas on why this might be?

[wilsonh]

I also ran i2cdetect -l to see what i2c busses were present. Here is the output from running i2cdetect 0; i2cdetect 1; i2cdetect 2:

root@beaglebone:~/chibio# i2cdetect 0; i2cdetect 1; i2cdetect 2
Warning: Can't use SMBus Quick Write command, will skip some addresses
WARNING! This program can confuse your I2C bus, cause data loss and worse!
I will probe file /dev/i2c-0.
I will probe address range 0x03-0x77.
Continue? [Y/n] y
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:                                                 
10:                                                 
20:                                                 
30: -- -- -- -- 34 -- -- --                         
40:                                                 
50: UU -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60:                                                 
70:                                                 
Warning: Can't use SMBus Quick Write command, will skip some addresses
WARNING! This program can confuse your I2C bus, cause data loss and worse!
I will probe file /dev/i2c-1.
I will probe address range 0x03-0x77.
Continue? [Y/n] y
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:                                                 
10:                                                 
20:                                                 
30: -- -- -- -- -- -- -- --                         
40:                                                 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60:                                                 
70:                                                 
Warning: Can't use SMBus Quick Write command, will skip some addresses
WARNING! This program can confuse your I2C bus, cause data loss and worse!
I will probe file /dev/i2c-2.
I will probe address range 0x03-0x77.
Continue? [Y/n] y
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:                                                 
10:                                                 
20:                                                 
30: -- -- -- -- -- -- -- --                         
40:                                                 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60:                                                 
70:                                                 
root@beaglebone:~/chibio# 

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