MCF8315EVM: Unable to connect using GUI or spin motor using pot

Hi Keith,

May you describe what your actions are and what appears on the GUI (ex: after plugging in the USB, the bottom of the screen says failed to connect)? For spinning the motor without GUI on the EVM, I will try replicating the steps and get back to you later today.

Regards,

Hong

In the GUI (The web version since I can't install the local one). I:

• Plug in the board
• Go to the serial port configuration and make sure the COM port is selected
• Leave the baud rate as default (9600) and press OK
• Press the link on the bottom left of the screen
• GUI shows "Connecting to target ..."
• It is never able to establish a connection

Hi Keith,

You may be encountering an issue with drivers. If you are on Windows, go to Device Manager, and then Ports (COM & LPT). If the port corresponding to the EVM has a yellow caution sign on the USB symbol, try installing the FTDI VCP driver from here: https://ftdichip.com/drivers/vcp-drivers/.

Best,

Hong

Hi Hong,

The COM port did not show any issues in device manager, but I reinstalled the FTDI drivers just to verify. There was no change in behavior after reinstalling.

Hi Keith,

Does D6 turn on when you plug in the USB? Also, have you ever been able to connect or get the motor to spin on this device, or are these errors preventing you from doing so?

Regards,

Hong

Hi Hong,

D6 does turn on when USB is connected. I have been unable to spin a motor, I have even tried simply using the pot control with no results.

Hi Keith,

Just to verify, may you screenshot your device manager with the com ports expanded?

We can try to install the offline version of the GUI; when you try download GUI composer from web when installing the MCF8315A GUI, what error message shows up?

Regards,

Hong

Hi Hong,

Here is the device manager ports, I do see the port on the web GUI.

Here is what I see when I try to use the download option

Thanks!

Hi Keith,

The error may be from corporate security software blocking the web install. May you try uninstalling your current GUI composer runtime and installing from a file?

Go to https://dev.ti.com/gallery and search for MCF8315A. Hover over the download button and click "Windows runtime" to download the GUI composer installer.

Then, when installing the GUI, instead of using the download from web option, choose the windows runtime installer as the file to install from.

Let me know if there are any errors in this process and if the offline version works!

Regards,

Hong

Hi Hong,

I was able to successfully install the GUI and connect to the board.

I am able to get the motor to spin, however it is not responding to speed controls. I've tried both using 'Analog' with the pot and the I2C based control.

I first had issues with the 'MPET BEMF FAULT', but adjusting the current as directed in the steps solved this.

Under the motor status I see this:

And the motor continues to spin even if I tell it to go to 0% unless I use the break switch on the board.

Thank you for the help.

Hi Hong,

I just tried to adjust that value. It started at 15% and I tried the options up to 50% (maximum). The speed did not appear to change with different settings and the GUI indicated it was still stuck trying to measure KE.

Hi Keith,

May you upload your registers here? Go to File > Save Registers to get a JSON file. I can look over them to try and see any anomalies.

Regards,

Hong

Hi Hong,

Unfortunately I am now having connection issues with the board. I can do an initial connection through the GUI but when I do anything (reset values, read registers, etc.) it disconnects and shows me

I have tried a second USB cable with the same issue. If I can get back to where I was at previously I will save the registers

Hey Keith, 

 We will take a look at this and aim to provide feedback next week.

Best,

Akshay

Hi,

I was able to connect to a different board. It seems that the one I had been using had some problems and may be damaged/faulty.

Using the second board I ran through the setup steps. I had adjusted the 'MPET_OPEN_LOOP_CURR_REF' as suggested based on the fault, once that was updated the motor seems to be perpetually spinning, no faults but not finishing the MPET. I adjusted the 'MPET_OPEN_LOOP_SPEED_REF' as suggested, and the motor did spin faster, but it was still getting stuck at the same point.

Here are my registers

{
  "signature": "oneui-register-data",
  "data": [
    [
      {
        "idx": 0,
        "id": "isd_config",
        "value": "0x64738C20"
      },
      {
        "idx": 1,
        "id": "rev_drive_config",
        "value": "0xA8200000"
      },
      {
        "idx": 2,
        "id": "motor_startup1",
        "value": "0x0B6807D0"
      },
      {
        "idx": 3,
        "id": "motor_startup2",
        "value": "0xA306600C"
      },
      {
        "idx": 4,
        "id": "closed_loop1",
        "value": "0x0D3201B5"
      },
      {
        "idx": 5,
        "id": "closed_loop2",
        "value": "0x9BAD0000"
      },
      {
        "idx": 6,
        "id": "closed_loop3",
        "value": "0x00000000"
      },
      {
        "idx": 7,
        "id": "closed_loop4",
        "value": "0x00000168"
      },
      {
        "idx": 8,
        "id": "speed_profiles1",
        "value": "0x00000000"
      },
      {
        "idx": 9,
        "id": "speed_profiles2",
        "value": "0x00000000"
      },
      {
        "idx": 10,
        "id": "speed_profiles3",
        "value": "0x00000000"
      },
      {
        "idx": 11,
        "id": "speed_profiles4",
        "value": "0x800D0000"
      },
      {
        "idx": 12,
        "id": "speed_profiles5",
        "value": "0x00000000"
      },
      {
        "idx": 13,
        "id": "speed_profiles6",
        "value": "0x00000000"
      }
    ],
    [
      {
        "idx": 0,
        "id": "algo_ctrl1",
        "value": "0x00000000"
      },
      {
        "idx": 1,
        "id": "algo_debug1",
        "value": "0x80000000"
      },
      {
        "idx": 2,
        "id": "algo_debug2",
        "value": "0x00000000"
      },
      {
        "idx": 3,
        "id": "current_pi",
        "value": "0x03010301"
      },
      {
        "idx": 4,
        "id": "speed_pi",
        "value": "0x00000000"
      },
      {
        "idx": 5,
        "id": "dac_1",
        "value": "0x00000000"
      },
      {
        "idx": 6,
        "id": "dac_2",
        "value": "0x00000000"
      }
    ],
    [
      {
        "idx": 0,
        "id": "algorithm_state",
        "value": "0x0000000D"
      },
      {
        "idx": 1,
        "id": "fg_speed_fdbk",
        "value": "0x7FFFFFFF"
      },
      {
        "idx": 2,
        "id": "bus_current",
        "value": "0x00000000"
      },
      {
        "idx": 3,
        "id": "phase_current_a",
        "value": "0xFFF80000"
      },
      {
        "idx": 4,
        "id": "phase_current_b",
        "value": "0x00140000"
      },
      {
        "idx": 5,
        "id": "phase_current_c",
        "value": "0x000C0000"
      },
      {
        "idx": 6,
        "id": "csa_gain_feedback",
        "value": "0x00000002"
      },
      {
        "idx": 7,
        "id": "voltage_gain_feedback",
        "value": "0x00000001"
      },
      {
        "idx": 8,
        "id": "vm_voltage",
        "value": "0x0323C000"
      },
      {
        "idx": 9,
        "id": "phase_voltage_va",
        "value": "0x00045483"
      },
      {
        "idx": 10,
        "id": "phase_voltage_vb",
        "value": "0x0004C35D"
      },
      {
        "idx": 11,
        "id": "phase_voltage_vc",
        "value": "0x00045483"
      },
      {
        "idx": 12,
        "id": "sin_commutation_angle",
        "value": "0x08000000"
      },
      {
        "idx": 13,
        "id": "cos_commutation_angle",
        "value": "0x00000000"
      },
      {
        "idx": 14,
        "id": "ialpha",
        "value": "0x14840000"
      },
      {
        "idx": 15,
        "id": "ibeta",
        "value": "0x0FB94937"
      },
      {
        "idx": 16,
        "id": "valpha",
        "value": "0x00C692A2"
      },
      {
        "idx": 17,
        "id": "vbeta",
        "value": "0x000193EB"
      },
      {
        "idx": 18,
        "id": "id",
        "value": "0xFFEFD77C"
      },
      {
        "idx": 19,
        "id": "iq",
        "value": "0x07484CFE"
      },
      {
        "idx": 20,
        "id": "vd",
        "value": "0xFFE2B788"
      },
      {
        "idx": 21,
        "id": "vq",
        "value": "0x005B56B2"
      },
      {
        "idx": 22,
        "id": "iq_ref_rotor_align",
        "value": "0xE666C700"
      },
      {
        "idx": 23,
        "id": "speed_ref_open_loop",
        "value": "0xFF507155"
      },
      {
        "idx": 24,
        "id": "iq_ref_open_loop",
        "value": "0xE666C700"
      },
      {
        "idx": 25,
        "id": "speed_ref_closed_loop",
        "value": "0x00000000"
      },
      {
        "idx": 26,
        "id": "id_ref_closed_loop",
        "value": "0x00000000"
      },
      {
        "idx": 27,
        "id": "iq_ref_closed_loop",
        "value": "0x00000000"
      },
      {
        "idx": 28,
        "id": "isd_state",
        "value": "0x00000005"
      },
      {
        "idx": 29,
        "id": "isd_speed",
        "value": "0x0D342EDA"
      },
      {
        "idx": 30,
        "id": "ipd_state",
        "value": "0x00000000"
      },
      {
        "idx": 31,
        "id": "ipd_angle",
        "value": "0x07BC8D18"
      },
      {
        "idx": 32,
        "id": "ed",
        "value": "0x0002125D"
      },
      {
        "idx": 33,
        "id": "eq",
        "value": "0x003D2722"
      },
      {
        "idx": 34,
        "id": "speed_fdbk",
        "value": "0x019286CA"
      },
      {
        "idx": 35,
        "id": "theta_est",
        "value": "0xB40A8D51"
      }
    ],
    [
      {
        "idx": 0,
        "id": "fault_config1",
        "value": "0xC6C80106"
      },
      {
        "idx": 1,
        "id": "fault_config2",
        "value": "0xF0D00888"
      }
    ],
    [
      {
        "idx": 0,
        "id": "gate_driver_fault_status",
        "value": "0x00000000"
      },
      {
        "idx": 1,
        "id": "controller_fault_status",
        "value": "0x00000000"
      }
    ],
    [
      {
        "idx": 0,
        "id": "pin_config",
        "value": "0x00000002"
      },
      {
        "idx": 1,
        "id": "device_config1",
        "value": "0x00101462"
      },
      {
        "idx": 2,
        "id": "device_config2",
        "value": "0xC000F00F"
      },
      {
        "idx": 3,
        "id": "peri_config1",
        "value": "0xC1C01F00"
      },
      {
        "idx": 4,
        "id": "gd_config1",
        "value": "0x9C450100"
      },
      {
        "idx": 5,
        "id": "gd_config2",
        "value": "0x80200000"
      }
    ],
    [
      {
        "idx": 0,
        "id": "int_algo_1",
        "value": "0xA43341FD"
      },
      {
        "idx": 1,
        "id": "int_algo_2",
        "value": "0x000001A7"
      }
    ],
    [
      {
        "idx": 0,
        "id": "algo_status",
        "value": "0x0FB70004"
      },
      {
        "idx": 1,
        "id": "mtr_params",
        "value": "0x9B001E00"
      },
      {
        "idx": 2,
        "id": "algo_status_mpet",
        "value": "0xCA000000"
      }
    ]
  ]
}

Hi Joshua,

I have tried those steps and still am getting the same response. It does not appear to actually be skipping that part. Is there another configuration I need to set to do that?

Manually spinning the motor and measuring with a scope to calculate the constant.

Hi Joshua,

Going through these steps allows me to spin the motor using the pot, I2C, or PWM. It does appear that the first board I used was faulty in some way, so it did require a second board after I started to have the connection issues.

Thank you for the assistance!