DRV8899-Q1: DRV8899-Q1_Motor control

user6507123

Prodigy 50 points

Part Number: DRV8899-Q1

HI Team,

We tried to use GUI and DRV8899-Q1 to control the motor. It is confirmed that TOOL is connected,

but the motor will not rotate after setting. I want to ask if there is anything that needs attention, thanks

over 3 years ago

0 Ryan Kehr over 3 years ago

TI__Guru 54645 points

Hello,

Can you share some screen captures of the settings you have and the steps you have taken after connecting the GUI to the EVM?

Also, picture of motor connections would be helpful.

0 user6507123 over 3 years ago in reply to Ryan Kehr

Prodigy 50 points

HI Ryan,

We tried the GUI again to make the motor move, but the motor can only rotate in a single direction.

We choose another direction and it cannot be locked. How can I set the GUI to make it rotate forward and backward, thanks

0 Ryan Kehr over 3 years ago in reply to user6507123

TI__Guru 54645 points

Hello,

Did you check the software user guide?

I took a screen capture showing how to change direction.

0 Ryan Kehr over 3 years ago in reply to Ryan Kehr

TI__Guru 54645 points

0 user6507123 over 3 years ago in reply to Ryan Kehr

Prodigy 50 points

Hi Ryan,

The message at the bottom left of the GUI keeps showing "Connecting to target …." for more than ten minutes…

1.VBAT has been given 5V, and GND is also connected.

2. COM port driver can also be detected (Figure 2)

Please help confirm if there are any other things that need attention,Thanks

0 Ryan Kehr over 3 years ago in reply to user6507123

TI__Guru 54645 points

For GUI 1.1.1 or later version, please try changing the baud rate to 115200. I believe it will connect then. This is mentioned in the user guide I linked above.

0 user6507123 over 3 years ago in reply to Ryan Kehr

Prodigy 50 points

hi Ryan,

about DRV8899 test, if we want to connect to other MCU,

remove (R3, R4, R6, R7, R9, R11, R12, R14, R15, R16, and R17),

then MCU needs to connect to those points of the DRV8899, To make the MCU and DRV8899 work normally, thank you

0 Ryan Kehr over 3 years ago in reply to user6507123

TI__Guru 54645 points

That is correct. You can connect to external MCU over the J3 header.

0 user6507123 over 3 years ago in reply to Ryan Kehr

Prodigy 50 points

HI Ryan,

Because we changed other MCUs to connect with DRV8899, but Motor can’t rotate, please remove (R3, R4, R6, R7, R9, R11, R12, R14, R15, R16, and R17), then when using other MCU, Whether (R3, R4, R6, R7, R9, R11, R12, R14, R15, R16, and R17), also have to be returned, we want to inquire about this, please help confirm, thank you

0 Ryan Kehr over 3 years ago in reply to user6507123

TI__Guru 54645 points

Removing those resistors physically disconnects the onboard MCU signals from the DRV8899 driver and allows an external MCU to drive the control pins on the DRV8899.

1) How have you connected the external MCU?

2) Have you checked that you have power going to the DRV8899?

3) Have you used a scope to check the STEP input on the device?

4) Are you getting SPI communication between your external MCU and the DRV8899...able to write and read back registers?

5) Have you checked the state of the nFAULT pin on the DRV8899?

6) What is the state of nSLEEP and DRVOFF? nSLEEP should be HIGH and DRVOFF should be LOW.

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DRV8899-Q1: DRV8899-Q1_Motor control