debian@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: 30 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- UU UU UU UU -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
The slave device would not respond to commands and upon inspecting it with a scope the voltage signal is appearing lower than the high threshold and has a very high time constant it seems.
The slave device has its own internal pull-up resistors of two 4.7k resistors one on each of the buses to the 3V supply on the BBB.
The frequency of the bus is set to 400kHz on i2c-2. The BBB is being powered by USB only.
The following images are of the SCL bus
Could the issue be that the pull up resistors are too high? Does the BBB require more power via an external source?
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On Apr 4, 2018, at 10:06 PM, yassyass <yasir...@gmail.com> wrote:
Thanks Wulf, I will attempt to increase the resistor values and get back with results.
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