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Original question:

DRV8235: DRV8235 I2C Control for 24V 3.5A Brushed DC Motor

DRV8235: DRV8235 IIC interface is not working

Manoj E
Prodigy 20 points
Part Number: DRV8235

Tool/software:

Hi,

I am trying to establish an IIC communication between the DRV8235EVM Motor driver and Renesas RA Microcontroller.
Since I am using an external microcontroller, I removed the jumper pins in DRV8235 at SDA, SCL  for IIC communication and A0, A1 for slave selection. (This cuts down the control of on board MSP microcontroller present in EVM)

A0 and A1 pins are pulled low by connecting it to ground, making it 0,0 values. SDA and SCL pins are connected to the respective SDA and SCL pins in the Renesas MCU board. DRV8235EVM is connected to PC using USB cable provided by TI.

Slave address is being selected as 0x60h while configuring Renesas MCU.

After flashing the firmware in expectation of IIC communication, the IIC communication is getting aborted with this Error code : I2C_MASTER_EVENT_ABORTED.

I would like to know the issues in the setup or if anything else wrong in my approach.

Any extra suggestions regarding this would be highly appreciated !

  • 0
    TI__Mastermind 19230 points

    Hello,

    If possible, could you please send a picture of the setup. It sounds like the issue could be with the MCU connection. If using an external MCU then the USB should be connected to the MCU not the EVM.

    Have you tried connecting Renesas RA Microcontroller to PC then only supplying VM supply voltage to EVM?

    Best,

    David