This section details the features of the EVM GUI Software. The GUI is written in GUI Composer and is available on the development software gallery at dev.ti.com/gallery.

Figure 3-1 DRV8334EVM GUI Software

The GUI connects and programs the C2000 MCU on the LAUNCHXL-F280049C board when launched, assuming the board is connected/powered.

Once the hardware is connected, the FAULT Status and Voltage Monitors match the EVM. If these do not match, then please remove EVM power and recheck the setup.

To spin the motor:

1. Launch the GUI located on dev.ti.com/gallery.
2. Take the DRV8334 out of sleep mode by toggling nSLEEP to WAKE.
3. Enable the PWM using the Output Enable toggle switch.
   1. The DRV8334 reports no faults (Fault LED green on GUI, no red nFAULT LED on the EVM) and VMOTOR/GVDD voltage is reported by the GUI.
4. Set acceleration (update rate) of Duty cycle and increase PWM Duty Cycle using the slider or text input.
5. The motor now spins.

To Read and Write SPI registers:

1. Enter the Address in Hex (0x00) in the Address (0x00) field.
2. Enter the data (for write transaction) in the Data (0x0000) field. For Read transactions, the data is Don’t Care and is ignored.
3. Click anywhere on the screen to deselect the text input field.
4. Click SPI WRITE or SPI READ to send the command to the DRV8334. If the text field is not deselected first, then click the SPI WRITE or SPI READ a second time to execute the transaction.
5. If the complete SPI readback is needed for a Read transaction, then the user can enable the full SPI readback including the address/data/CRC using the checkbox.