I2C protocol interfacing Accelerometer MMA7660fc

[mdrasool_yadwad]

Hello,

  I was interfacing the K60 microcontroller with the accelerometer MMA7660FC which is available on the tower board using I2C . I am configuring Microcontroller as master and MMA78451Q accelerometer as slave.

When I am transmitting in master mode the slave address is transmitting correctly by setting interrupt flag in status register but when i transmit register address it is not transmitting it is hanging there only when is check interrupt flag in while loop. I am not getting whats the issue. Please help me out.

Iam using I2C baud of 100k. I am attaching my code please check it once

Thanking You

[nxf56274]

Hi,

Sorry for the late. We have the latest library in our website "https://mcuxpresso.nxp.com/en/select ", you can try it. Please tell me which register you can't write.

Have a great day,
TIC

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[mdrasool_yadwad]

Hello Da Li,

   Sir actually the problem is when i debug by using break points it is updating but once i run without break point is not working. When i check the status register the interrupt flag is not raising after sending the register address of the slave.

And one more thing when i configure accelerometer by writing to the register 07 to change to the active mode and starts reading the accelerometer it is not giving the output. whether i need any configurations to update.

Thanking You,

Mohammedrasool

[nxf56274]

Hi,

You would be better to try the latest library in our website "https://mcuxpresso.nxp.com/en/select ". And using debugger to debug the communication protocol will influence the timing sequence of i2c. Use logic analyzer or  oscilloscope to watch wave.

Have a great day,

TIC

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[mdrasool_yadwad]

Hello,

I have taken screenshot let you see this. After giving values for few iterations the master switches to the slave automatically.

[nxf56274]

Hi,

We no longer support the codewarrior. If the code have some problems, please use the latest library and our free tool MCUXpresso. 

Have a great day,

TIC

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