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SPI mode confusing in between LaunchpadXL and BoosterXL DRV8301

user4246147
Prodigy 190 points
Other Parts Discussed in Thread: DRV8301, MOTORWARE

Between processor and driver board, there is SPI connection to set the registers in DRV8301 chip.

In lab05b GPIO is initialized at hal.c like this:

  // SPI-SIMO or OCTWn
  GPIO_setMode(obj->gpioHandle,GPIO_Number_16,GPIO_16_Mode_TZ2_NOT);

  // SPI-SOMI or FAULTn
  GPIO_setMode(obj->gpioHandle,GPIO_Number_17,GPIO_17_Mode_TZ3_NOT);

  // SPI-STE or SDI
  GPIO_setMode(obj->gpioHandle,GPIO_Number_19,GPIO_19_Mode_GeneralPurpose);


why pins are NOT configured as SPI like this ? :


  GPIO_16_Mode_SPISIMOA,           //!< Denotes a SPISIMOA function

  GPIO_17_Mode_SPISOMIA,           //!< Denotes a SPISOMIA function

  GPIO_19_Mode_SPISTEA_NOT,        //!< Denotes a SPISTEA_NOT function
 
 

How these pins can control SPI bus of DRV8301  when they are initialized  like so ?

  • 0
    TI__Guru** 118000 points

    I don't think you are looking at the correct file.

    from

    C:\ti\motorware\motorware_1_01_00_14\sw\modules\hal\boards\boostxldrv8301_revB\f28x\f2802x\src\hal.c

      // SPI_SDI if JP4 is soldered, No Connection if JP4 is not soldered
      GPIO_setMode(obj->gpioHandle,GPIO_Number_16,GPIO_16_Mode_SPISIMOA);

      // SPI_SDO if JP6 is soldered, No Connection if JP6 is not soldered
      GPIO_setMode(obj->gpioHandle,GPIO_Number_17,GPIO_17_Mode_SPISOMIA);

      // SPI_CLK
      GPIO_setMode(obj->gpioHandle,GPIO_Number_18,GPIO_18_Mode_SPICLKA);

      // SPI_SCS
      GPIO_setMode(obj->gpioHandle,GPIO_Number_19,GPIO_19_Mode_SPISTEA_NOT);

    or from

    C:\ti\motorware\motorware_1_01_00_14\sw\modules\hal\boards\boostxldrv8301_revB\f28x\f2806x\src\hal.c

      // SPIA SIMO
      GPIO_setMode(obj->gpioHandle,GPIO_Number_16,GPIO_16_Mode_SPISIMOA);

      // SPIA SOMI
      GPIO_setMode(obj->gpioHandle,GPIO_Number_17,GPIO_17_Mode_SPISOMIA);

      // SPIA CLK
      GPIO_setMode(obj->gpioHandle,GPIO_Number_18,GPIO_18_Mode_SPICLKA);

      // SPIA CS
      GPIO_setMode(obj->gpioHandle,GPIO_Number_19,GPIO_19_Mode_SPISTEA_NOT);