帮我看下这个代码哪里设置错了吗，我现在寄存器里drr1,drr2都为0xffff最大值，不变化了

void initmcbsp()
{

//*************** RESET MCBSP
	McbspaRegs.SPCR2.bit.GRST =0;
	McbspaRegs.SPCR2.bit.FRST=0;
	McbspaRegs.SPCR1.bit.RRST=0;
	McbspaRegs.SPCR2.all=0x0000;		// Reset FS generator, sample rate generator & transmitter
	McbspaRegs.SPCR1.all=0x0000;		// Reset Receiver, Right justify word
	McbspaRegs.SPCR1.bit.DLB = 0; 
	McbspaRegs.SPCR1.bit.RRDY=0;
	McbspaRegs.PCR.bit.FSRM=10;
	McbspaRegs.MFFINT.all=0x0;				//// Disable all interrupts
	McbspaRegs.RCR2.all=0x0000;			// Single-phase frame, 1 word/frame, No companding	(Receive)
    McbspaRegs.RCR1.all=0x0000;
//*************** Initialize McBSP Registers
// McBSP register settings for Digital loop back
 
   McbspaRegs.RCR2.all=0x0001;  // RDATDLY = 1
   McbspaRegs.RCR1.all=0x0;
   McbspaRegs.XCR2.all=0x0001;  // XDATDLY = 1
   McbspaRegs.XCR1.all=0x0;

   McbspaRegs.SRGR2.all=0x3140;
   McbspaRegs.SRGR1.all=0x010f;
   McbspaRegs.MCR2.all=0x0;
   McbspaRegs.MCR1.all=0x0;
   McbspaRegs.PCR.all=0x0A00;

   McbspaRegs.MFFINT.bit.XINT = 0; // Enable Transmit Interrupts
   McbspaRegs.MFFINT.bit.RINT = 1;
	McbspaRegs.RCR1.all=0x0000;
	McbspaRegs.RCR2.all=0x0000;
	McbspaRegs.SRGR1.all=0x0000;
	McbspaRegs.SRGR2.all=0x0000;
	McbspaRegs.PCR.all=0x0000;
	//开始设置mcbsp//
	//设置mcbsp时钟生成器，并通过硬件仿真进行观察//
	//停止模式设置成0//
	//lspclk=4,clkgdv=63使得CLKG=314khz//
	McbspaRegs.SPCR1.bit.CLKSTP=00;
	McbspaRegs.PCR.bit.SCLKME=0;
	McbspaRegs.SRGR2.bit.CLKSM=1;
	McbspaRegs.SRGR1.bit.CLKGDV=3;
	McbspaRegs.SPCR1.bit.DLB=0;
	McbspaRegs.SPCR1.bit.RJUST=01;
	McbspaRegs.SPCR1.bit.RINTM=01;
	McbspaRegs.PCR.bit.CLKRM=1;
	McbspaRegs.MCR1.bit.RMCM=0;
	McbspaRegs.SRGR2.bit.FPER=63;
	McbspaRegs.SRGR2.bit.GSYNC=0;
	McbspaRegs.PCR.bit.FSRM=1;
	McbspaRegs.SRGR1.bit.FWID=31;
	//////////////////////////////
	/////////////////////////////
	/////////////////////////////
	McbspaRegs.RCR1.bit.RFRLEN1=0;
	McbspaRegs.RCR2.bit.RFRLEN2=0;
	McbspaRegs.RCR1.bit.RWDLEN1=101;
	McbspaRegs.RCR2.bit.RWDLEN2=101;
	McbspaRegs.RCR2.bit.RPHASE=1;
	McbspaRegs.RCR2.bit.RDATDLY=1;
	McbspaRegs.RCR2.bit.RFIG=1;
	McbspaRegs.RCR2.bit.RCOMPAND=00;
	McbspaRegs.PCR.bit.FSRP=1;
	McbspaRegs.PCR.bit.CLKRP=0;
	McbspaRegs.MCR1.bit.RMCME=0;
	McbspaRegs.MCR1.bit.RMCM=0;
	McbspaRegs.MFFINT.bit.RINT=1;
	
	McbspaRegs.SPCR1.bit.RRST=1;
	McbspaRegs.SPCR2.bit.GRST=1;
	McbspaRegs.SPCR2.bit.FRST=1;

//************* Enable Sample rate generator

asm (" NOP ");      // Wait at least 2 SRG clock cycles
asm (" NOP ");  
asm (" NOP ");
asm (" NOP ");      // Wait at least 2 SRG clock cycles
	asm (" NOP ");  
   EDIS;