dsp28_sysctrl.c

来自「合众达2812开发例程」· C语言 代码 · 共 53 行

#include "DSP28_Device.h"

//---------------------------------------------------------------------------
// InitSysCtrl: 
//---------------------------------------------------------------------------
// This function initializes the System Control registers to a known state.
//
void InitSysCtrl(void)
{
   Uint16 i;
   EALLOW;
       
// Disable watchdog module
   SysCtrlRegs.WDCR= 0x0068;

// Initalize PLL
   SysCtrlRegs.PLLCR = 0xA;
   // 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;
				
   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.
//===========================================================================