main.c

本程序是中在CCS开发环境下

/*
 *  Copyright 2003 by Texas Instruments Incorporated.
 *  All rights reserved. Property of Texas Instruments Incorporated.
 *  Restricted rights to use, duplicate or disclose this code are
 *  granted through contract.
 *  
 */
/* "@(#) DSP/BIOS 4.90.270 06-11-03 (barracuda-m10)" */
/*
 *  Copyright 2001 by Texas Instruments Incorporated.
 *  All rights reserved. Property of Texas Instruments Incorporated.
 *  Restricted rights to use, duplicate or disclose this code are
 *  granted through contract.
 *  U.S. Patent Nos. 5,283,900  5,392,448
 */
/* "@(#) DSP/BIOS 4.51.0 05-23-01 (barracuda-i10)" */
/******************************************************************************\
*           Copyright (C) 2000 Texas Instruments Incorporated.
*                           All Rights Reserved
*------------------------------------------------------------------------------
* FILENAME...... main.c
* DATE CREATED.. 01/11/2000
* LAST MODIFIED. 09/27/2000
\******************************************************************************/
#include <std.h>
#include <log.h>
#include <swi.h>

#include <csl.h>
#include <csl_mcbsp.h>

/*----------------------------------------------------------------------------*/
extern far LOG_Obj LogMain;
extern far SWI_Obj SwiMain;

/*----------------------------------------------------------------------------*/
/* create a config structure for digital loopback mode */
static MCBSP_Config ConfigLoopback = {
  MCBSP_SPCR_RMK(
    MCBSP_SPCR_FREE_YES,
    MCBSP_SPCR_SOFT_YES,
    MCBSP_SPCR_FRST_NO,
    MCBSP_SPCR_GRST_NO,
    MCBSP_SPCR_XINTM_XRDY,
    MCBSP_SPCR_XSYNCERR_NO,
    MCBSP_SPCR_XRST_NO,
    MCBSP_SPCR_DLB_ON,
    MCBSP_SPCR_RJUST_RZF,
    MCBSP_SPCR_CLKSTP_DISABLE,
    MCBSP_SPCR_DXENA_OFF,
    MCBSP_SPCR_RINTM_RRDY,
    MCBSP_SPCR_RSYNCERR_NO,
    MCBSP_SPCR_RRST_NO
  ),
  MCBSP_RCR_RMK(
    MCBSP_RCR_RPHASE_SINGLE,
    MCBSP_RCR_RFRLEN2_OF(0),
    MCBSP_RCR_RWDLEN2_8BIT,
    MCBSP_RCR_RCOMPAND_MSB,
    MCBSP_RCR_RFIG_YES,
    MCBSP_RCR_RDATDLY_0BIT,
    MCBSP_RCR_RFRLEN1_OF(0), 
    MCBSP_RCR_RWDLEN1_32BIT,
    MCBSP_RCR_RWDREVRS_DISABLE
  ),
  MCBSP_XCR_RMK(
    MCBSP_XCR_XPHASE_SINGLE,
    MCBSP_XCR_XFRLEN2_OF(0),
    MCBSP_XCR_XWDLEN2_8BIT,
    MCBSP_XCR_XCOMPAND_MSB,
    MCBSP_XCR_XFIG_YES,
    MCBSP_XCR_XDATDLY_0BIT,
    MCBSP_XCR_XFRLEN1_OF(0), 
    MCBSP_XCR_XWDLEN1_32BIT,
    MCBSP_XCR_XWDREVRS_DISABLE
  ),
  MCBSP_SRGR_RMK(
    MCBSP_SRGR_GSYNC_FREE,
    MCBSP_SRGR_CLKSP_RISING,
    MCBSP_SRGR_CLKSM_INTERNAL,
    MCBSP_SRGR_FSGM_DXR2XSR,
    MCBSP_SRGR_FPER_OF(63),
    MCBSP_SRGR_FWID_OF(31),
    MCBSP_SRGR_CLKGDV_OF(15)
  ),
  MCBSP_MCR_DEFAULT,
  MCBSP_RCERE0_DEFAULT,
  MCBSP_RCERE1_DEFAULT,
  MCBSP_RCERE2_DEFAULT,
  MCBSP_RCERE3_DEFAULT,
  MCBSP_XCERE0_DEFAULT,
  MCBSP_XCERE1_DEFAULT,
  MCBSP_XCERE2_DEFAULT,
  MCBSP_XCERE3_DEFAULT,
  MCBSP_PCR_RMK(
    MCBSP_PCR_XIOEN_SP,
    MCBSP_PCR_RIOEN_SP,
    MCBSP_PCR_FSXM_INTERNAL,
    MCBSP_PCR_FSRM_EXTERNAL,
    MCBSP_PCR_CLKXM_OUTPUT,
    MCBSP_PCR_CLKRM_INPUT,
    MCBSP_PCR_CLKSSTAT_0,
    MCBSP_PCR_DXSTAT_0,
    MCBSP_PCR_DXSTAT_0,
    MCBSP_PCR_FSRP_ACTIVEHIGH,
    MCBSP_PCR_CLKXP_RISING,
    MCBSP_PCR_CLKRP_FALLING
  )
}; 

/*----------------------------------------------------------------------------*/
void main() {

  /* Initialize the chip support library, required */
  CSL_init();
  
  SWI_post(&SwiMain);
}  

/*----------------------------------------------------------------------------*/
void SwiMainFunc() {

  MCBSP_Handle hMcbsp;  
  volatile Uint32 x,y;
  int success = 1;

  LOG_printf(&LogMain,"<MCBSP1>");

  /* The following code                                         */
  /* configures the serial port for digital loopback mode. We   */
  /* then use the CPU to write/read from the port. In loopback  */
  /* mode, we should read the same value as written, this is    */
  /* checked for in a loop.                                     */
  
  /* Let's open up serial port 1 */
  hMcbsp = MCBSP_open(MCBSP_DEV1, MCBSP_OPEN_RESET);
  
  /* We'll set it up for digital loopback, 32bit mode. We have   */
  /* to setup the sample rate generator to allow self clocking.  */
  MCBSP_config(hMcbsp,&ConfigLoopback);

  /* Now that the port is setup, let's enable it in steps. */
  MCBSP_enableSrgr(hMcbsp);
  MCBSP_enableRcv(hMcbsp);
  MCBSP_enableXmt(hMcbsp);
  
  
  
  /* Now we'll loop for a while writing values out to the port */
  /* then reading them back in. This should take a few seconds.*/
  for (y=0; y<0x00080000; y++) {  
  
    /* wait until the transmitter is ready for a sample then write to it */
    while (!MCBSP_xrdy(hMcbsp));                       
    MCBSP_write(hMcbsp,y);
  
    /* now wait until the value is received then read it */
    while (!MCBSP_rrdy(hMcbsp));           
    x = MCBSP_read(hMcbsp);
    
    /* check to make sure they match */
    if (x != y) {
      success = 0;
    }
  }
  
  /* All done now, close the port. */
  MCBSP_close(hMcbsp); 
  
  LOG_printf(&LogMain,"success=%d",success);
  LOG_printf(&LogMain,"<DONE>");
}

/*----------------------------------------------------------------------------*/

/******************************************************************************\
* End of main.c
\******************************************************************************/