www.pudn.com > cs8900a.rar > DSP28_Mcbsp.c

// 
//      TMDX ALPHA RELEASE 
//      Intended for product evaluation purposes 
// 
//########################################################################### 
// 
// FILE:	DSP28_McBSP.c 
// 
// TITLE:	DSP28 Deviec McBSP Initialization & Support Functions. 
// 
//########################################################################### 
// 
//  Ver | dd mmm yyyy | Who  | Description of changes 
// =====|=============|======|=============================================== 
//  0.55| 06 May 2002 | L.H. | EzDSP Alpha Release 
//  0.56| 20 May 2002 | L.H. | No change 
//  0.57| 27 May 2002 | L.H. | No change 
//########################################################################### 
 
#include "DSP28_Device.h" 
 
//--------------------------------------------------------------------------- 
// InitMcbsp:  
//--------------------------------------------------------------------------- 
// This function initializes the McBSP to a known state. 
// 
void InitMcbsp(void) 
{ 
/* 
	EALLOW; 
	GpioMuxRegs.GPFMUX.all = 0x3F00; 
	EDIS; 
*/	 
	 
/*	 
	 
	McbspRegs.SPCR2.all = 0x0000;  
	McbspRegs.SPCR1.all = 0x0000; 
	 
	McbspRegs.SPCR1.all = SPCR10_VAL; 
	McbspRegs.SPCR2.all = SPCR20_VAL; 
	McbspRegs.PCR1.all = PCR0_VAL; 
	 
	McbspRegs.XCR1.all = XCR10_VAL; 
	McbspRegs.XCR2.all = XCR20_VAL; 
	McbspRegs.RCR1.all = RCR10_VAL; 
	McbspRegs.RCR2.all = RCR20_VAL; 
	 
	NOP; 
	NOP; 
	McbspRegs.DXR1.all = 0; 
	 
	McbspRegs.MFFINT.bit.RINT = 1; 
	McbspRegs.SPCR1.bit.RRST = 1; 
	McbspRegs.SPCR2.bit.XRST = 1; 
	NOP; 
	NOP;*/ 
 
} 
 
void mcbsp_fifo_init()                                         
{ 
 
    McbspRegs.MFFTX.all=0x0000; 
    McbspRegs.MFFRX.all=0x001F; 
    McbspRegs.MFFCT.all=0x0; 
    McbspRegs.MFFINT.all=0x0; 
    McbspRegs.MFFST.all=0x0;   
// Bit changes as applicable  to each tests 
    McbspRegs.MFFTX.bit.MFFENA=1;                        // Enable FIFO 
    McbspRegs.MFFTX.bit.XRESET=1;                        // Enable Transmit channel 
    McbspRegs.MFFRX.bit.RRESET=1;                        // Enable Receive channel 
       
     
}   
 
unsigned int Mcbsp_TxRdy(void) 
{ 
	if(McbspRegs.SPCR2.bit.XRDY == 1) 
	{ 
		return(1); 
	} 
	else 
	{ 
		return(0); 
	} 
} 
 
unsigned int Mcbsp_RxRdy(void) 
{ 
	if(McbspRegs.SPCR1.bit.RRDY == 1) 
	{ 
		return(1); 
	} 
	else 
	{ 
		return(0); 
	} 
} 
	 
//=========================================================================== 
// No more. 
//===========================================================================