mcbsp.c

DEC5502_USB程序主要实现了与PC机应用程序之间的USB通讯

/****************************************************************************************/
//
// Filename:  	mcbsp.c
// Function:	config MCBSP to interface codec` data interface
//
/****************************************************************************************/

#include <csl_mcbsp.h>

// 定义McBSP的句柄
MCBSP_Handle MyMcbsp;
/*-----------------------------------------------------------------------------------*/
//
// Config McBSP:  Use McBSP to send and receive the data between DSP and AIC23B
//
/*-----------------------------------------------------------------------------------*/
MCBSP_Config Mcbsp1Config = {
  MCBSP_SPCR1_RMK(    
    MCBSP_SPCR1_DLB_OFF,  			// DLB    = 0 
    MCBSP_SPCR1_RJUST_LZF,          // RJUST  = 0,right justify the data and zero fill the MSBs
    MCBSP_SPCR1_CLKSTP_DISABLE,     // CLKSTP = 0 
    MCBSP_SPCR1_DXENA_ON,           // DXENA  = 1,DX delay enabler on 
    0,             				   	// Reserved   = 0 
    MCBSP_SPCR1_RINTM_RRDY,         // RINTM  = 0 
    MCBSP_SPCR1_RSYNCERR_NO,        // RSYNCER = 0 
    MCBSP_SPCR1_RFULL_NO,           // RFULL = 0  
    MCBSP_SPCR1_RRDY_NO,            // RRDY = 0  
    MCBSP_SPCR1_RRST_DISABLE 		// RRST   = 0; Disable receiver 
   ),
  MCBSP_SPCR2_RMK(  
    MCBSP_SPCR2_FREE_NO,            // FREE   = 0 
    MCBSP_SPCR2_SOFT_NO,            // SOFT   = 0 
    MCBSP_SPCR2_FRST_FSG,         	// FRST   = 1 ; Enable the frame-sync logic
    MCBSP_SPCR2_GRST_CLKG,         	// GRST   = 1 ; The sample rate generator is take out of its reset state 
    MCBSP_SPCR2_XINTM_XRDY,         // XINTM  = 0 
    MCBSP_SPCR2_XSYNCERR_NO,        // XSYNCER =0 
    MCBSP_SPCR2_XEMPTY_NO,          // XEMPTY = 0 
    MCBSP_SPCR2_XRDY_NO,            // XRDY   = 0             
    MCBSP_SPCR2_XRST_DISABLE 	    // XRST   = 0 Disable transimitter 
   ),
   // 单数据相，接受数据长度为16位,每相2个数据
  MCBSP_RCR1_RMK( 
  	MCBSP_RCR1_RFRLEN1_OF(1),       // RFRLEN1 = 1 
  	MCBSP_RCR1_RWDLEN1_16BIT        // RWDLEN1 = 2 
  ),
  MCBSP_RCR2_RMK(    
    MCBSP_RCR2_RPHASE_SINGLE,       // RPHASE  = 0 
    MCBSP_RCR2_RFRLEN2_OF(0),       // RFRLEN2 = 0 
    MCBSP_RCR2_RWDLEN2_8BIT,       	// RWDLEN2 = 0 
    MCBSP_RCR2_RCOMPAND_MSB,        // RCOMPAND = 0 No companding,any size data, MSB received first 
    MCBSP_RCR2_RFIG_YES,  		    // RFIG    = 1 Frame-sync ignore 
    MCBSP_RCR2_RDATDLY_1BIT  		// RDATDLY = 1 1-bit data delay 
    ),  
  MCBSP_XCR1_RMK(    
    MCBSP_XCR1_XFRLEN1_OF(1),       // XFRLEN1 = 1  
    MCBSP_XCR1_XWDLEN1_16BIT        // XWDLEN1 = 2   
 ),   
 MCBSP_XCR2_RMK(   
    MCBSP_XCR2_XPHASE_SINGLE,       // XPHASE  = 0 
    MCBSP_XCR2_XFRLEN2_OF(1),       // XFRLEN2 = 0 
    MCBSP_XCR2_XWDLEN2_8BIT,       	// XWDLEN2 = 0 
    MCBSP_XCR2_XCOMPAND_MSB,        // XCOMPAND = 0 
    MCBSP_XCR2_XFIG_YES,            // XFIG    = 1 Unexpected Frame-sync ignore 
    MCBSP_XCR2_XDATDLY_1BIT         // XDATDLY = 1 1-bit data delay 
  ),            
 MCBSP_SRGR1_DEFAULT,
 MCBSP_SRGR2_DEFAULT,				 
 MCBSP_MCR1_DEFAULT,
 MCBSP_MCR2_DEFAULT, 
 MCBSP_PCR_RMK(
   MCBSP_PCR_IDLEEN_RESET,          // IDLEEN   = 0   
   MCBSP_PCR_XIOEN_SP,              // XIOEN    = 0   
   MCBSP_PCR_RIOEN_SP,              // RIOEN    = 0   
   MCBSP_PCR_FSXM_EXTERNAL,  		// FSXM     = 0 Tranmit frame-syn is provided by AIC23B 
   MCBSP_PCR_FSRM_EXTERNAL,         // FSRM     = 0 Receive frame-syn is provided by AIC23B 
   MCBSP_PCR_CLKXM_INPUT,   		// CLKR is input 
   MCBSP_PCR_CLKRM_INPUT,           // CLKX is input 
   MCBSP_PCR_SCLKME_NO,             // SCLKME=0 CLKG is taken from the McBSP internal input clock  
   MCBSP_PCR_CLKSSTAT_0,            // The signal on the CLKS pin is low   
   MCBSP_PCR_DXSTAT_0,              // Drive the signal on the DX pin low   
   MCBSP_PCR_DRSTAT_0,              // The signal on the DR pin is low   
   MCBSP_PCR_FSXP_ACTIVEHIGH,  		// FSXP     = 1 Because a falling edge on LRCIN or LRCOUT starts data transfer  
   MCBSP_PCR_FSRP_ACTIVELOW,        // FSRP     = 1   
   MCBSP_PCR_CLKXP_FALLING,         // CLKXP    = 1   The falling edge of BCLK starts data transfer 
   MCBSP_PCR_CLKRP_RISING           // CLKRP    = 1   
 ),
 MCBSP_RCERA_DEFAULT, 
 MCBSP_RCERB_DEFAULT, 
 MCBSP_RCERC_DEFAULT, 
 MCBSP_RCERD_DEFAULT, 
 MCBSP_RCERE_DEFAULT, 
 MCBSP_RCERF_DEFAULT, 
 MCBSP_RCERG_DEFAULT, 
 MCBSP_RCERH_DEFAULT, 
 MCBSP_XCERA_DEFAULT,
 MCBSP_XCERB_DEFAULT,
 MCBSP_XCERC_DEFAULT,
 MCBSP_XCERD_DEFAULT,  
 MCBSP_XCERE_DEFAULT,
 MCBSP_XCERF_DEFAULT,  
 MCBSP_XCERG_DEFAULT,
 MCBSP_XCERH_DEFAULT
 }; 

/***************************************************************/
//
//	Functionname:	Mcbsp_Config();	
//	Function:		Realize MCBSP configuration
//
/***************************************************************/ 

extern void Mcbsp_Config(void)
  {
    /* Open McBSP port 1 and get a McBSP type handle */
	MyMcbsp = MCBSP_open(MCBSP_PORT1,MCBSP_OPEN_RESET);

    /* Config McBSP	port 1 by use previosly defined structure */
	MCBSP_config(MyMcbsp,&Mcbsp1Config);
   }  

/****************************************************************/
//
//	Functionname:	Receiv_data()	
//	Function:		Receive data from codec A/D
//
/****************************************************************/ 
extern void Receiv_data(unsigned int *DataPtr)
{		
	/* Wait for sample from handset */
	while(!MCBSP_rrdy(MyMcbsp)){};

	/* Read sample from  handset codec */
	*DataPtr = MCBSP_read16(MyMcbsp);
	DataPtr++;
	
	/* Wait for sample from handset */
	while(!MCBSP_rrdy(MyMcbsp)){};
	
	/* Read sample from  handset codec */
	*DataPtr = MCBSP_read16(MyMcbsp);
}

/****************************************************************/
//
//	Functionname:	Trans_data()	
//	Function:		Transimite data to codec D/A
//
/****************************************************************/ 
extern void Trans_data(unsigned int *DataPtr)
{
	/* Wait for transimitter pin empty */
	while(!MCBSP_xrdy(MyMcbsp)){}; 
	
	/* write back to handset codec */
    MCBSP_write16(MyMcbsp,*DataPtr);
    DataPtr++;
    
    /* Wait for transimitter pin empty */
	while(!MCBSP_xrdy(MyMcbsp)){};

	/* write back to handset codec */
    MCBSP_write16(MyMcbsp,*DataPtr);
}

/*****************************************************************/
//	No more
/*****************************************************************/