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Original question:

DRV8703-Q1EVM: DRV8703-Q1EVM

DRV8703-Q1EVM: SPI CODE FOR SETTINGS IN DRV8703

UMA SANKAR K S
Prodigy 40 points
Part Number: DRV8703-Q1EVM
Other Parts Discussed in Thread: DRV8703-Q1,

I am using drv8703 to drive. We dont how to alter Idrive using  spi

I need  spi code

  • 0
    TI__Guru** 114905 points
    Hi Uma,

    We have recently found a bug in the DRV8703-Q1 GUI that resets the registers when transitioning from the register page back to the main motor control page. The bug is currently being addressed but in the short term, there is a workaround.

    After opening the GUI and waking the device:
    1. Set the desired MODE
    2. Wake the device
    3. Go to the register page and set the desired values for the test
    4. Select File -> Save registers as. Name the file.
    5. Go to the main page – the registers are reset when switching from the register page to the main page. There is a command in the GUI that issues a nSLEEP pulse. We will look into removing that command. In addition, VREF and Duty cycles are reset when changing from the register page to the main page.
    6. Select File -> Load registers. Select the file named in step 4. The registers are now set to the proper values
    7. Run the device as intended using the VREF and Duty Cycle.

    FYI -- The SPI code is available in the file www.ti.com/.../slvc673. This file contains the GUI and the DRV8703-Q1EVM firmware