• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 30 subscribers
  • Views 316 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TM4C1294NCPDT: BUSFAULT during configure the internal pin muxes for EPI(SDRAM)

dwas dwasw
Prodigy 100 points
Part Number: TM4C1294NCPDT

Hi,

This is code

//
      // EPI0S00 ~ EPI0S03, EPI0S31 : H0 ~ 3
      //
      ui32Val = HWREG(GPIO_PORTH_BASE + GPIO_O_PCTL);
      ui32Val &= 0xFFFF0000;
      ui32Val |= 0x0000FFFF;
      HWREG(GPIO_PORTK_BASE + GPIO_O_PCTL) = ui32Val;


      //
      // EPI0S4 ~ EPI0S7: C4 ~ 7
      //
      ui32Val = HWREG(GPIO_PORTC_BASE + GPIO_O_PCTL);
      ui32Val &= 0x0000FFFF;
      ui32Val |= 0xFFFF0000;
      HWREG(GPIO_PORTC_BASE + GPIO_O_PCTL) = ui32Val;

      //
      // EPI0S8 ~ EPI0S9: A6 ~ 7
      //
      ui32Val = HWREG(GPIO_PORTA_BASE + GPIO_O_PCTL);
      ui32Val &= 0x00FFFFFF;
      ui32Val |= 0xFF000000;
      HWREG(GPIO_PORTA_BASE + GPIO_O_PCTL) = ui32Val;

      //
      // EPI0S10 ~ EPI0S11: G0 ~ 1
      //
      ui32Val = HWREG(GPIO_PORTG_BASE + GPIO_O_PCTL);
      ui32Val &= 0xFFFFFF00;
      ui32Val |= 0x000000FF;
      HWREG(GPIO_PORTG_BASE + GPIO_O_PCTL) = ui32Val;

      //
      // EPI0S12 ~ EPI0S15: M0 ~ 3
      //
      ui32Val = HWREG(GPIO_PORTM_BASE + GPIO_O_PCTL);
      ui32Val &= 0xFFFF0000;
      ui32Val |= 0x0000FFFF;
      HWREG(GPIO_PORTM_BASE + GPIO_O_PCTL) = ui32Val;

      //
      // EPI0S16 ~ EPI0S19: L0 ~ 3
      //
      ui32Val = HWREG(GPIO_PORTL_BASE + GPIO_O_PCTL);
      ui32Val &= 0xFFFF0000;
      ui32Val |= 0x0000FFFF;
      HWREG(GPIO_PORTL_BASE + GPIO_O_PCTL) = ui32Val;

      //
      // EPI0S28 : B3
      //
      ui32Val = HWREG(GPIO_PORTB_BASE + GPIO_O_PCTL);
      ui32Val &= 0xFFFF0FFF;
      ui32Val |= 0x0000F000;
      HWREG(GPIO_PORTB_BASE + GPIO_O_PCTL) = ui32Val;

      //
      // EPI0S29 ~ EPI0S30: P2 ~ 3
      //
      ui32Val = HWREG(GPIO_PORTP_BASE + GPIO_O_PCTL);
      ui32Val &= 0xFFFF00FF;
      ui32Val |= 0x0000FF00;
      HWREG(GPIO_PORTN_BASE + GPIO_O_PCTL) = ui32Val;

      //
      // EPI0S31 : K5
      //
      ui32Val = HWREG(GPIO_PORTK_BASE + GPIO_O_PCTL);
      ui32Val &= 0xFF0FFFFF;
      ui32Val |= 0x00F00000;
      HWREG(GPIO_PORTK_BASE + GPIO_O_PCTL) = ui32Val;

BUSFALUT appear at pin K5.

I enabled all use GPIO peripherals.

This line.

ui32Val = HWREG(GPIO_PORTK_BASE + GPIO_O_PCTL);

this is ROV exception window.

and this is disassembly of address that PC have.

configure for other port is work OK.

Only Port K cause problem.

  • 0
    TI__Guru 72500 points

    I suspect that you did not enable the clock to Port K. 

    We very strongly discourage the use of direct register writes like you have done in your code above. Instead, use the TivaWare library functions instead. This will reduce the number of mistakes you make and make it easier for others to assist you.