MCF8316A: Motor not spinning up by I2C

Daniel Meier

Part Number: MCF8316A

We have a MCF8316AEVM board preconfigured through the GUI. Control over I2C works there.

I'm now trying to run the motor over our own I2C implementation.
I2C communication seems to work fine. I can read registers without issues.

Now when I write into the ALGO_CTRL1 Register (OVERRIDE = 1, DIGITAL_SPEED_CTRL any high value), the motor doesn't spin up as expected.
Do I need to do something else before I can assume control over I2C?

I can control the motor with the potentiometer as long as I don't send the override over I2C. As soon as I send that, this stops working as expected. Just the motor doesn't spin up.

over 2 years ago

0 Joshua Horlander Cruz over 2 years ago

TI__Mastermind 23990 points

Hi Daniel,

I will need some time to look into this issue, I will get back to you by next Thursday.

Regards,

Joshua

0 Joshua Horlander Cruz over 2 years ago in reply to Joshua Horlander Cruz

TI__Mastermind 23990 points

Hi Daniel,

Could you provide me a read back of the ALGO_CTRL1 register after you set the OVERRIDE and DIGITAL_SPEED_CTRL bits?

If you have not already, could you try setting the OVERRIDE bit (0x80000000) and then preform another write command to set the DIGITAL_SPEED_CTRL bits (0xFFFF0000) and see if this works?

Regards,

Joshua

Motor drivers

Motor drivers forum

MCF8316A: Motor not spinning up by I2C