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Strange I2C behavior on Netduino Plus 2

hardware i2c netduino plus 2

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#1 maliman


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Posted 11 May 2013 - 06:04 AM

Hi All, I'm having no problem using I2C on Netduino Plus board. But as soon as I use NP2 I2C, bus transaction doesn't shows in oscilloscope. After doing some digging I found out that I2C transaction will start only if I connect the I2C slave after the NP2 finish initilization process. Meaning I have to wait after NP2 finish initialize and then connect the I2C slave. It doesn't happen with NP board, where i don't have to disconnect I2C slave everytime the NP reboot process. I've upgrade my NP2 firmware to v4.2.2.2. Thanks.



#2 i182willsw



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Posted 28 July 2013 - 09:38 AM

Well you're post helped a lot... maybe, I now know how to get my i2c on my netduino 2 working. but it is a pain to have to disconnect every time and then reconnect. anybody figure this out yet?

#3 iced98lx


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Posted 30 July 2013 - 09:10 PM

Mine is not behaving in that fashion- I leave both an i2c backpack hooked to an LCD and a 16 channel PWM breakout board connected through reboots with no problem.

#4 =M=


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Posted 29 August 2013 - 12:28 AM

This is exactly how my NP2 behaves! Running latest firmware ( on VS2010 with MF4.2.

Is there a fix for this problem?

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