dsp28_sysctrl.c

这是DSP2812关于系统控制以及配置元程序,对DSP初学者非常有用,希望大家一起学习进步!

/*************************************************************************************
** 文件名:DSP28_SysCtrl.c

** Copyright (c) 2006-2006 CHEM

** 创建人:辛书辉

** 日  期:2006-10-01

** 修改人:辛书辉

** 日  期:2006-10-01

** 版  本:DSP2812.1

** 用  途: DSP28 Device System Control.

** 范  围: Initialization & Support Functions.

*************************************************************************************/

#include "DSP28_Device.h"

//---------------------------------------------------------------------------
// InitSysCtrl: 
//---------------------------------------------------------------------------
// This function initializes the System Control registers to a known state.
//
void InitSysCtrl(void)
{
   Uint16 i;
   EALLOW;
   
// On TMX samples, to get the best performance of on chip RAM blocks M0/M1/L0/L1/H0 internal
// control registers bit have to be enabled. The bits are in Device emulation registers.
   DevEmuRegs.M0RAMDFT = 0x0300;
   DevEmuRegs.M1RAMDFT = 0x0300;
   DevEmuRegs.L0RAMDFT = 0x0300;
   DevEmuRegs.L1RAMDFT = 0x0300;
   DevEmuRegs.H0RAMDFT = 0x0300;
   
           
// Disable watchdog module
   SysCtrlRegs.WDCR= 0x0068;
// Enable watchdog module
//   SysCtrlRegs.WDCR= 0x002F;   

// Initalize PLL
   SysCtrlRegs.PLLCR = 0x000A;
   //SysCtrlRegs.PLLCR = 0x00;
   //SysCtrlRegs.PLLCR = 0x10;   
   // Wait for PLL to lock
   for(i= 0; i< 5000; i++){}
       
// HISPCP/LOSPCP prescale register settings, normally it will be set to default values
   SysCtrlRegs.HISPCP.all = 0x0001;
   SysCtrlRegs.LOSPCP.all = 0x0002;	
// Peripheral clock enables set for the selected peripherals.   
   SysCtrlRegs.PCLKCR.bit.EVAENCLK=1;
   SysCtrlRegs.PCLKCR.bit.EVBENCLK=1;
   SysCtrlRegs.PCLKCR.bit.SCIENCLKA=1;
   SysCtrlRegs.PCLKCR.bit.SCIENCLKB=1;
   
   SysCtrlRegs.PCLKCR.bit.ADCENCLK=1;//使能ADC外设内部的高速时钟
				
   EDIS;
	
}

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

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

	
//===========================================================================
// No more.
//===========================================================================