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- /* parallel.c - Simple, abortable example of parallel.device usage
- *
- * Copyright (c) 1990 Commodore-Amiga, Inc.
- *
- * This example is provided in electronic form by Commodore-Amiga, Inc. for
- * use with the 1.3 revisions of the Addison-Wesley Amiga reference manuals.
- * The 1.3 Addison-Wesley Amiga Reference Manual series contains additional
- * information on the correct usage of the techniques and operating system
- * functions presented in this example. The source and executable code of
- * this example may only be distributed in free electronic form, via bulletin
- * board or as part of a fully non-commercial and freely redistributable
- * diskette. Both the source and executable code (including comments) must
- * be included, without modification, in any copy. This example may not be
- * published in printed form or distributed with any commercial product.
- * However, the programming techniques and support routines set forth in
- * this example may be used in the development of original executable
- * software products for Commodore Amiga computers.
- * All other rights reserved.
- * This example is provided "as-is" and is subject to change; no warranties
- * are made. All use is at your own risk. No liability or responsibility
- * is assumed.
- *
- * Compile with Lattice 5.04: LC -Lt -catsfq
- */
- #include <exec/types.h>
- #include <devices/parallel.h>
- #include <libraries/dos.h>
- #ifdef LATTICE
- #include <proto/exec.h>
- #include <stdio.h>
- int CXBRK(void) { return(0); } /* Disable Lattice CTRL-C handling */
- void main(void);
- #endif
-
- #define DEVICE_NAME "parallel.device"
- #define UNIT_NUMBER 0
-
- void main()
- {
- struct MsgPort *ParallelMP; /* Define storage for one pointer */
- struct IOExtPar *ParallelIO; /* Define storage for one pointer */
- ULONG WaitMask; /* Collect all signals here */
- ULONG Temp; /* Hey, we all need pockets :-) */
-
- if( ParallelMP=CreatePort(0,0) )
- {
- if( ParallelIO=(struct IOExtPar *)
- CreateExtIO(ParallelMP,sizeof(struct IOExtPar)) )
- {
- ParallelIO->io_ParFlags=0; /* Example of setting flags */
-
- if ( OpenDevice(DEVICE_NAME,UNIT_NUMBER,ParallelIO,0) )
- printf("Parallel.device did not open\n");
- else
- {
- /* Precalculate a wait mask for the CTRL-C, CTRL-F and message
- * port signals. When one or more signals are received,
- * Wait() will return. Press CTRL-C to exit the example.
- * Press CTRL-F to wake up the example without doing anything.
- * NOTE: A signal may show up without an associated message!
- */
- WaitMask = SIGBREAKF_CTRL_C|
- SIGBREAKF_CTRL_F|
- 1L << ParallelMP->mp_SigBit;
-
- ParallelIO->IOPar.io_Command = CMD_WRITE;
- ParallelIO->IOPar.io_Length = -1;
- ParallelIO->IOPar.io_Data = (APTR)"Hey, Jude! \015\012";
- SendIO(ParallelIO); /* execute write */
-
- printf("Sleeping until CTRL-C, CTRL-F, or write finish\n");
- while(1)
- {
- Temp = Wait(WaitMask);
- printf("Just woke up (YAWN!)\n");
-
- if( SIGBREAKF_CTRL_C & Temp)
- break;
-
- if( CheckIO(ParallelIO) ) /* If request is complete... */
- {
- WaitIO(ParallelIO); /* clean up and remove reply */
- printf("%ld bytes sent\n",ParallelIO->IOPar.io_Actual);
- break;
- }
- }
-
- AbortIO(ParallelIO); /* Ask device to abort request, if pending */
- WaitIO(ParallelIO); /* Wait for abort, then clean up */
-
- CloseDevice(ParallelIO);
- }
- DeleteExtIO(ParallelIO);
- }
- DeletePort(ParallelMP);
- }
- }
-