2812FLASH运行速度慢问题

只看该作者 · 2014-5-7 10:43

2812硬件仿真速度较快,但下载到FLASH中运行速度下降10倍左右,可能初始设置有问题,请高手帮忙.

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

//Set the Random Waitstate for the Flash
  FlashRegs.FBANKWAIT.bit.RANDWAIT = 5;

  //Set the Paged Waitstate for the Flash
  FlashRegs.FBANKWAIT.bit.PAGEWAIT = 5;

//Set number of cycles to transition from sleep to standby
  FlashRegs.FSTDBYWAIT.bit.STDBYWAIT = 0x01FF;

  //Set number of cycles to transition from standby to active
  FlashRegs.FACTIVEWAIT.bit.ACTIVEWAIT = 0x01FF;
  EDIS;

.

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

void InitPll(Uint16 val)
{
  volatile Uint16 iVol;

EALLOW;
SysCtrlRegs.PLLCR.bit.DIV = 6;
/////////////////////////////add
XintfRegs.XINTCNF2.bit.CLKOFF=1 ;//off clkout
XintfRegs.XINTCNF2.bit.WRBUFF=3 ;//
XintfRegs.XINTCNF2.bit.CLKMODE=0;//
   XintfRegs.XINTCNF2.bit.XTIMCLK=0;//=sysclk
///////////////////////////////////////////
SysCtrlRegs.HISPCP.all = 0x0007; //low clk
SysCtrlRegs.LOSPCP.all = 0x0007; //low clk
EDIS;


   for(iVol= 0; iVol< ( (131072/2)/12 ); iVol++)
{

}
  }

}