DRV8313EVM: Change position control using MSP430 via SPI

May

Part Number: DRV8313EVM
Other Parts Discussed in Thread: DRV8313, MSP430G2553

Hi,

Customer want to know how to if it possible to control the position from a second MSP430-FR5994 via SPI instead of the on-board potentiometer. Please see details below.

I am running the standalone example that TI provides for the board. I was hoping to change the program to control the position from a second MSP430-FR5994 via SPI instead of the on-board potentiometer.

I've seen elsewhere that the motor control code is proprietary or can't be shared. I was wondering if I would be able to change the provided code to send the duty cycle to the DRV8313 for control instead of using the potentiometer with these limitations. If it is possible, what would the general steps be for making this conversion? Is there documentation available that would show which variables I need to work with for modifying the duty cycle during standalone use?

Thank you.

Regards,
Maynard

over 2 years ago

0 Andrew Liu over 2 years ago

TI__Mastermind 18916 points

Hi Maynard,

We will review the info above & aim to give a response by early next week

Best Regards,
Andrew

0 May over 2 years ago in reply to Andrew Liu

TI__Genius 9880 points

Hi Andrew,

Looking forward to your update.

Thank you.

Regards,
Maynard

0 Anthony Lodi over 2 years ago in reply to May

TI__Mastermind 19885 points

Hi Maynard,

Thanks for your patience on this! Unfortunately I do not see a way to implement the speed control on this EVM using SPI communication from a second MSP430 device since the SPI pins on the MSP430G2553 on the EVM are being used for other tasks. If you are not wanting to use the potentiometer, the only other option is to control it directly from the GUI by setting the control mode to either Duty Cycle or Velocity as described in section 3.2 of the User's Guide.

Regards,

Anthony Lodi

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DRV8313EVM: Change position control using MSP430 via SPI