Can't get fopen ("i2c0:", NULL) to work

[MikeMarynowski]

Hi,

I'm currently trying out the 52259 eval board and MQX 3.3 and the following lines:

  

ftouch = fopen ("i2c0:", NULL);   if (ftouch == NULL) {   printf ("Failed to open the I2C driver!\n");   _task_block();}

always ends up going into the failed block.  I have enabled I2C0 in user_config.h for the BSP.  I also tried the i2c sample project in MQX samples and the same thing happens.

Any idea why that might be?

Thanks,

--Mike

[MikeMarynowski · Accepted solution]

Nevermind...got it working.

[navin_b]

Hi,

    I am new to FreeScale and MQX. I am facing similar problem as described by Mike. Can some body please help me?

Thanks in advance

Message Edited by navin_b on 2010-02-08 06:44 AM

[MikeMarynowski]

You have to go through the board configuration and set the desired pins as I2C primary function instead of GPIO function.

[navin_b]

Thanks for answering but my problem is little different from yours. The example code works fine ( it does open the file successfully) but in my project (the one i create in CW) it does not happen so. Can you please say which file should i modify to change the primary function.

[navin_b]

I was doing it wrong way. sorry, mistake on my part. I forgot to build libs in config directory.

[MikeMarynowski]

Also, just tried the I2C sample in MQX 3.2, same thing. 

That version passes I2C_DEVICE_MASTER_MODE explicitly as the second parameter to fopen, so that's not the problem.

EDIT:

I can fopen the SDA0 / SCL0 pins on PORT_AS just fine as GPIO, so I'm not sure why the I2C fopen is failing.

Message Edited by MikeMarynowski on 2009-10-17 01:51 AM