dsp280x_sysctrl.c

dsp 320 dvdg do not put files on these two directory.If you do not want to upload source code

// TI File $Revision: /main/7 $
// Checkin $Date: April 4, 2007   09:01:43 $
//###########################################################################
//
// FILE:   DSP280x_SysCtrl.c
//
// TITLE:  DSP280x Device System Control Initialization & Support Functions.
//
// DESCRIPTION:
//
//         Example initialization of system resources.
//
//###########################################################################
// $TI Release: DSP280x Header Files V1.50 $
// $Release Date: September 10, 2007 $
//###########################################################################


#include "DSP280x_Device.h"     // Headerfile Include File
#include "DSP280x_Examples.h"   // Examples Include File

// Functions that will be run from RAM need to be assigned to
// a different section.  This section will then be mapped to a load and
// run address using the linker cmd file.

#pragma CODE_SECTION(InitFlash, "ramfuncs");

//---------------------------------------------------------------------------
// InitSysCtrl:
//---------------------------------------------------------------------------
// This function initializes the System Control registers to a known state.
// - Disables the watchdog
// - Set the PLLCR for proper SYSCLKOUT frequency
// - Set the pre-scaler for the high and low frequency peripheral clocks
// - Enable the clocks to the peripherals

void InitSysCtrl(void)
{

   // Disable the watchdog
   DisableDog();

   // Initialize the PLL control: PLLCR and CLKINDIV
   // DSP28_PLLCR and DSP28_CLKINDIV are defined in DSP280x_Examples.h
   InitPll(DSP28_PLLCR,DSP28_CLKINDIV);

   // Initialize the peripheral clocks
   InitPeripheralClocks();
}


//---------------------------------------------------------------------------
// Example: InitFlash:
//---------------------------------------------------------------------------
// This function initializes the Flash Control registers

//                   CAUTION
// This function MUST be executed out of RAM. Executing it
// out of OTP/Flash will yield unpredictable results

void InitFlash(void)
{
   EALLOW;
   //Enable Flash Pipeline mode to improve performance
   //of code executed from Flash.
   FlashRegs.FOPT.bit.ENPIPE = 1;

   //                CAUTION
   //Minimum waitstates required for the flash operating
   //at a given CPU rate must be characterized by TI.
   //Refer to the datasheet for the latest information.

   //Set the Paged Waitstate for the Flash
   FlashRegs.FBANKWAIT.bit.PAGEWAIT = 3;

   //Set the Random Waitstate for the Flash
   FlashRegs.FBANKWAIT.bit.RANDWAIT = 3;

   //Set the Waitstate for the OTP
   FlashRegs.FOTPWAIT.bit.OTPWAIT = 5;

   //                CAUTION
   //ONLY THE DEFAULT VALUE FOR THESE 2 REGISTERS SHOULD BE USED
   FlashRegs.FSTDBYWAIT.bit.STDBYWAIT = 0x01FF;
   FlashRegs.FACTIVEWAIT.bit.ACTIVEWAIT = 0x01FF;
   EDIS;

   //Force a pipeline flush to ensure that the write to
   //the last register configured occurs before returning.

   asm(" RPT #7 || NOP");
}


//---------------------------------------------------------------------------
// Example: ServiceDog:
//---------------------------------------------------------------------------
// This function resets the watchdog timer.
// Enable this function for using ServiceDog in the application

void ServiceDog(void)
{
    EALLOW;
    SysCtrlRegs.WDKEY = 0x0055;
    SysCtrlRegs.WDKEY = 0x00AA;
    EDIS;
}

//---------------------------------------------------------------------------
// Example: DisableDog:
//---------------------------------------------------------------------------
// This function disables the watchdog timer.

void DisableDog(void)
{
    EALLOW;
    SysCtrlRegs.WDCR= 0x0068;
    EDIS;
}

//---------------------------------------------------------------------------
// Example: InitPll:
//---------------------------------------------------------------------------
// This function initializes the PLLCR register.

void InitPll(Uint16 val, Uint16 clkindiv)
{
   volatile Uint16 iVol;

   // Make sure the PLL is not running in limp mode
   if (SysCtrlRegs.PLLSTS.bit.MCLKSTS != 0)
   {
      // Missing external clock has been detected
      // Replace this line with a call to an appropriate
      // SystemShutdown(); function.
      asm("        ESTOP0");
   }

   // CLKINDIV MUST be 0 before PLLCR can be changed from
   // 0x0000. It is set to 0 by an external reset XRSn
   if (SysCtrlRegs.PLLSTS.bit.CLKINDIV != 0)
   {
       SysCtrlRegs.PLLSTS.bit.CLKINDIV = 0;
   }

   // Change the PLLCR
   if (SysCtrlRegs.PLLCR.bit.DIV != val)
   {

      EALLOW;
      // Before setting PLLCR turn off missing clock detect logic
      SysCtrlRegs.PLLSTS.bit.MCLKOFF = 1;
      SysCtrlRegs.PLLCR.bit.DIV = val;
      EDIS;

      // Optional: Wait for PLL to lock.
      // During this time the CPU will switch to OSCCLK/2 until
      // the PLL is stable.  Once the PLL is stable the CPU will
      // switch to the new PLL value.
      //
      // This time-to-lock is monitored by a PLL lock counter.
      //
      // Code is not required to sit and wait for the PLL to lock.
      // However, if the code does anything that is timing critical,
      // and requires the correct clock be locked, then it is best to
      // wait until this switching has completed.

      // Wait for the PLL lock bit to be set.
      // Note this bit is not available on 281x devices.  For those devices
      // use a software loop to perform the required count.

      // The watchdog should be disabled before this loop, or fed within
      // the loop via ServiceDog().

	  // Uncomment to disable the watchdog
      DisableDog();

      while(SysCtrlRegs.PLLSTS.bit.PLLLOCKS != 1)
      {
	      // Uncomment to service the watchdog
          // ServiceDog();
      }

      EALLOW;
      SysCtrlRegs.PLLSTS.bit.MCLKOFF = 0;
      SysCtrlRegs.PLLSTS.bit.CLKINDIV != clkindiv;
      EDIS;
    }
}

//--------------------------------------------------------------------------
// Example: InitPeripheralClocks:
//---------------------------------------------------------------------------
// This function initializes the clocks to the peripheral modules.
// First the high and low clock prescalers are set
// Second the clocks are enabled to each peripheral.
// To reduce power, leave clocks to unused peripherals disabled
//
// Note: If a peripherals clock is not enabled then you cannot
// read or write to the registers for that peripheral

void InitPeripheralClocks(void)
{
   EALLOW;

// HISPCP/LOSPCP prescale register settings, normally it will be set to default values
   SysCtrlRegs.HISPCP.all = 0x0001;
   SysCtrlRegs.LOSPCP.all = 0x0002;

// XCLKOUT to SYSCLKOUT ratio.  By default XCLKOUT = 1/4 SYSCLKOUT
//   SysCtrlRegs.XCLK.bit.XCLKOUTDIV=2;	//XCLKOUT is sistem clock
   SysCtrlRegs.XCLK.bit.XCLKOUTDIV=3;   //XCLKOUT is off


// Peripheral clock enables set for the selected peripherals.
// If you are not using a peripheral leave the clock off
// to save on power.
//
// Note: not all peripherals are available on all 280x derivates.
// Refer to the datasheet for your particular device.
//
// This function is not written to be an example of efficient code.

   SysCtrlRegs.PCLKCR0.bit.ADCENCLK = 1;    // ADC
   SysCtrlRegs.PCLKCR0.bit.I2CAENCLK = 1;   // I2C
   SysCtrlRegs.PCLKCR1.bit.ECAP1ENCLK = 1;  // eCAP1
   SysCtrlRegs.PCLKCR1.bit.ECAP2ENCLK = 1;  // eCAP2
   SysCtrlRegs.PCLKCR1.bit.EPWM1ENCLK = 1;  // ePWM1
   SysCtrlRegs.PCLKCR1.bit.EPWM2ENCLK = 1;  // ePWM2
   SysCtrlRegs.PCLKCR1.bit.EPWM3ENCLK = 1;  // ePWM3
   SysCtrlRegs.PCLKCR0.bit.SCIAENCLK = 1;   // SCI-A
   SysCtrlRegs.PCLKCR0.bit.SPIAENCLK = 1;   // SPI-A

   if(DevEmuRegs.PARTID.bit.PARTNO != PARTNO_28015 &&
      DevEmuRegs.PARTID.bit.PARTNO != PARTNO_28016)
   {
      SysCtrlRegs.PCLKCR1.bit.EQEP1ENCLK = 1;  // eQEP1
      SysCtrlRegs.PCLKCR0.bit.SPIBENCLK = 1;   // SPI-B
   }

   if(DevEmuRegs.PARTID.bit.PARTNO != PARTNO_2801 &&
      DevEmuRegs.PARTID.bit.PARTNO != PARTNO_2802)
   {
	   SysCtrlRegs.PCLKCR1.bit.EPWM4ENCLK = 1;  // ePWM4
   }

   if(DevEmuRegs.PARTID.bit.PARTNO != PARTNO_28015)
   {
      SysCtrlRegs.PCLKCR0.bit.ECANAENCLK=1;    // eCAN-A
   }

   if(DevEmuRegs.PARTID.bit.PARTNO == PARTNO_2809 ||
      DevEmuRegs.PARTID.bit.PARTNO == PARTNO_2808 ||
      DevEmuRegs.PARTID.bit.PARTNO == PARTNO_2806 )
   {
	   SysCtrlRegs.PCLKCR1.bit.ECAP3ENCLK = 1;  // eCAP3
	   SysCtrlRegs.PCLKCR1.bit.ECAP4ENCLK = 1;  // eCAP4
	   SysCtrlRegs.PCLKCR1.bit.EPWM5ENCLK = 1;  // ePWM5
	   SysCtrlRegs.PCLKCR1.bit.EPWM6ENCLK = 1;  // ePWM6
	   SysCtrlRegs.PCLKCR0.bit.SCIBENCLK = 1;   // SCI-B
	   SysCtrlRegs.PCLKCR0.bit.SPICENCLK = 1;   // SPI-C
	   SysCtrlRegs.PCLKCR0.bit.SPIDENCLK = 1;   // SPI-D
	   SysCtrlRegs.PCLKCR1.bit.EQEP2ENCLK = 1;  // eQEP2

   }
   if(DevEmuRegs.PARTID.bit.PARTNO == PARTNO_2808 ||
      DevEmuRegs.PARTID.bit.PARTNO == PARTNO_2809)
   {
	   SysCtrlRegs.PCLKCR0.bit.ECANBENCLK=1;    // eCAN-B
   }

   SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1;       // Enable TBCLK within the ePWM

   EDIS;
}

//---------------------------------------------------------------------------
// Example: CsmUnlock:
//---------------------------------------------------------------------------
// This function unlocks the CSM. User must replace 0xFFFF's with current 
// password for the DSP. Returns 1 if unlock is successful.

#define STATUS_FAIL          0
#define STATUS_SUCCESS       1

Uint16 CsmUnlock()
{
    volatile Uint16 temp;

    // Load the key registers with the current password. The 0xFFFF's are dummy 
	// passwords.  User should replace them with the correct password for the DSP. 

    EALLOW;
    CsmRegs.KEY0 = 0xFFFF;
    CsmRegs.KEY1 = 0xFFFF;
    CsmRegs.KEY2 = 0xFFFF;
    CsmRegs.KEY3 = 0xFFFF;
    CsmRegs.KEY4 = 0xFFFF;
    CsmRegs.KEY5 = 0xFFFF;
    CsmRegs.KEY6 = 0xFFFF;
    CsmRegs.KEY7 = 0xFFFF;
    EDIS;

    // Perform a dummy read of the password locations
    // if they match the key values, the CSM will unlock

    temp = CsmPwl.PSWD0;
    temp = CsmPwl.PSWD1;
    temp = CsmPwl.PSWD2;
    temp = CsmPwl.PSWD3;
    temp = CsmPwl.PSWD4;
    temp = CsmPwl.PSWD5;
    temp = CsmPwl.PSWD6;
    temp = CsmPwl.PSWD7;

    // If the CSM unlocked, return succes, otherwise return
    // failure.
    if (CsmRegs.CSMSCR.bit.SECURE == 0) return STATUS_SUCCESS;
    else return STATUS_FAIL;

}


//===========================================================================
// End of file.
//===========================================================================