bcdemo5.c

1553B总线应用设计中BC模式示例

/* ILC Data Device Corp.
 *
 *        Advanced Communication Engine Integerated 1553 Terminal
 *        (ACE) 'C' Software Library
 *
 *        BUS-69080 rel 2.3 01-JAN-1996
 *
 *        Copyright (c) 1995, 1996 by ILC Data Device Corp.
 *        All Rights Reserved.
 *
 * bcdemo5.c
 *          This program demonstrates the use of BuBCRecallMinor. This
 *          function loads a minor frame from disk and does all the
 *          necessary message and minor frame creation. BuBCReadStk is
 *          then demonstrated to load the results of the minor frame into
 *          the BcStk buffer. This is then decoded and displayed using
 *          the BuBCDecodeStk and DisplayMsg routines.
 */

#include <stdio.h>
#include <stdlib.h>
#include <conio.h>

/* uncomment the following if using the 'ACEWIN31.DLL' Dynamic Link Library */

//#define __IMPORTDLL__

#include <stdace.h>


/* setup 8k stack */

#define BCSTKSIZE 8*1024

U16BIT BcStk[BCSTKSIZE];
U16BIT BcStkLen;


void DisplayMsg(MsgType*Msg);

void main ()
{
  BuConf_t  Conf; /* ACE library configuration type */
  BuError_t Err;  /* ACE library error status type */
  MsgType msg;
  int j;

  BCMinorFrmHandle myframe;  /* each minor frame has a handle */

  clrscr();

  /* display revision info */

  printf("%s\n\n",BuRev());

  /* load configuration from "ace.cfg" file and open ACE library */

  Err=BuInit("ace.cfg",&Conf);

  if(Err) {
          printf("BuError %d %s\n",Err,BuErrorStr(Err));
          return;
  }

  if(BuValid()) {

       /* enter bus controller mode of operation */
       BuBCOpen();

       /* recall minor frame to file */
       if(BuBCRecallMinor("test.frm",&myframe)==0) {
         printf("error loading .frm file\n");
         BuBCClose();
         BuClose();
         return;
       }

       /* set response timeout to 50.5 us */
       BuTimeout(RESPONSE_505);

       /* load minor frame into ACE stack */
       BuBCLoadMinor(BU_BCFRMBUFA,myframe);

       /* run frame */
       BuBCRunMinor(BU_BCFRMBUFA,BU_BCSINGLE);

       while(BuBCIsFrmActive());

       /* BcStkLen is modified to reflect the (used) stack size */
       BcStkLen=BCSTKSIZE;

       /* Read Frame A, into BcStk buffer, use BCmode storage */
       Err=BuBCReadStk(myframe,BcStk,&BcStkLen,BCmode);

       if(Err) {
         printf("BuError %d %s\n",Err,BuErrorStr(Err));
       }

       if(!Err) {
         /* BcStkLen and BcStk ptr are changed, so make a copy */
         U16BIT TempStkLen=BcStkLen;
         U16BIT *TempStkPtr=BcStk;

         while(TempStkLen&&(!kbhit())) {

           /* decode one message off the stack */
	         Err=BuBCDecodeStk(&TempStkPtr,&TempStkLen,&msg);
           /* display */
	         if(!Err)DisplayMsg(&msg);
           else printf("Error decoding stack (Error #0x%x)\n",Err);
         }

       } else {
         if(Err==BU_ERROR_BCBUFEMPTY) printf("Stack empty\n");
         else printf("*** Error reading stack (Error #0x%x)\n",Err);
       }

       /* free minor frame and associated messages */
       BuBCFreeMinor(myframe,TRUE);

       /* should be called to close bus controller mode */
       BuBCClose();

  } else printf("error communicating with pc card\n");

  BuClose();

}


void DisplayMsg(MsgType*Msg)
{
  U16BIT i;

  printf("Message Type = %s",BuMsgTypeStr(Msg->Type));
  if(Msg->BlockStatus&MT_ERR)printf(" (EXCEPTION)\n");else printf("\n");


  printf(" Cmd1 %04X %s\n",Msg->CmdWord1,BuCmdStr(Msg->CmdWord1));

  if(Msg->CmdWord2flag) {
       printf(" Cmd2 %04X %s\n",Msg->CmdWord2,BuCmdStr(Msg->CmdWord2));
  }

  printf(" Time %u uS\n",Msg->TimeTag*2); /*2us resolution*/
  printf(" GapT %u uS\n",Msg->GapTime); /*1us resolution*/
  printf(" BSW  %04X %s\n",Msg->BlockStatus,BuBCBSWErrorStr(Msg->BlockStatus));
  printf(" Ctrl %04X \n",Msg->ControlWord);

  for(i=0;i<Msg->DataLength;++i) {
         if(i==0)printf(" Data ");
         printf("%04X  ",Msg->Data[i]);
         if((i%6)==5)printf("\n      ");
  }
  if(Msg->Status1flag)printf("\n Sta1 %04X",Msg->Status1);
  if(Msg->Status2flag)printf("\n Sta2 %04X",Msg->Status2);
  if(Msg->LoopBack1flag)printf("\n Lpb1 %04X",Msg->LoopBack1);
  if(Msg->LoopBack2flag)printf("\n Lpb2 %04X",Msg->LoopBack2);
  printf("\n\n");
}