dsp28_sysctrl.c

来自「F2812实现电机控制源程序.rar」· C语言 代码 · 共 63 行

#include "DSP28_Device.h"

//---------------------------------------------------------------------------
// InitSysCtrl: 
//---------------------------------------------------------------------------
// This function initializes the System Control registers to a known state.
//初始化系统控制寄存器

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禁止看门狗
   SysCtrlRegs.WDCR= 0x0068;

// Initalize PLL
   SysCtrlRegs.PLLCR = 0x02;///锁相环产生的时钟频率定标,这里配置为30M		
   // 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;////高速外设时钟定标,这里为默认状态,为SYSCLKOUT1/2
   SysCtrlRegs.LOSPCP.all = 0x0002;	////低速外设时钟定标,这里为默认状态,为SYSCLKOUT1/4
// 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: 防止8位的看门狗计数器达到最大值,看门狗产生一时钟脉宽将DSP复位
//---------------------------------------------------------------------------
// This function resets the watchdog timer.
// Enable this function for using KickDog in the application 

void KickDog(void)///剔除看门狗函数
{
    EALLOW;
    SysCtrlRegs.WDKEY = 0x0055;
    SysCtrlRegs.WDKEY = 0x00AA;
    EDIS;
}
	
	
//===========================================================================
// No more.
//===========================================================================