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Almathera Ten Pack 3: CDPD 3
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741
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rkrm_devices
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rkrm_devices.lha
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Serial
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Complex_Serial.c
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C/C++ Source or Header
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1992-09-03
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9KB
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256 lines
/*
* Copyright (c) 1992 Commodore-Amiga, Inc.
*
* This example is provided in electronic form by Commodore-Amiga, Inc. for
* use with the "Amiga ROM Kernel Reference Manual: Devices", 3rd Edition,
* published by Addison-Wesley (ISBN 0-201-56775-X).
*
* The "Amiga ROM Kernel Reference Manual: Devices" contains additional
* information on the correct usage of the techniques and operating system
* functions presented in these examples. The source and executable code
* of these examples 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* example may not be published in printed form or distributed with any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 these examples 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.
*
*****************************************************************************
*
*
* Complex_Serial.c
*
* Complex tricky example of serial.device usage
*
* Compile with SAS C 5.10 lc -b1 -cfistq -v -y -L
*
* Run from CLI only
*/
#include <exec/types.h>
#include <exec/memory.h>
#include <dos/dos.h>
#include <devices/serial.h>
#include <clib/exec_protos.h>
#include <clib/alib_protos.h>
#include <stdio.h>
#ifdef LATTICE
int CXBRK(void) { return(0); } /* Disable Lattice CTRL/C handling */
int chkabort(void) { return(0); } /* really */
#endif
VOID main(VOID);
void main()
{
struct MsgPort *SerialMP; /* Define storage for one pointer */
struct IOExtSer *SerialIO; /* Define storage for one pointer */
#define READ_BUFFER_SIZE 32
char SerialReadBuffer[READ_BUFFER_SIZE]; /* Reserve SIZE bytes of storage */
struct IOExtSer *SerialWriteIO = 0;
struct MsgPort *SerialWriteMP = 0;
ULONG Temp;
ULONG WaitMask;
if (SerialMP=CreatePort(0,0) )
{
if (SerialIO=(struct IOExtSer *)
CreateExtIO(SerialMP,sizeof(struct IOExtSer)) )
{
SerialIO->io_SerFlags=0; /* Example of setting flags */
if (OpenDevice(SERIALNAME,0L,SerialIO,0) )
printf("%s did not open\n",SERIALNAME);
else
{
SerialIO->IOSer.io_Command = SDCMD_SETPARAMS;
SerialIO->io_SerFlags &= ~SERF_PARTY_ON;
SerialIO->io_SerFlags |= SERF_XDISABLED;
SerialIO->io_Baud = 9600;
if (Temp=DoIO(SerialIO))
printf("Error setting parameters - code %ld!\n",Temp);
SerialIO->IOSer.io_Command = CMD_WRITE;
SerialIO->IOSer.io_Length = -1;
SerialIO->IOSer.io_Data = (APTR)"Amiga.";
SendIO(SerialIO);
printf("CheckIO %lx\n",CheckIO(SerialIO));
printf("The device will process the request in the background\n");
printf("CheckIO %lx\n",CheckIO(SerialIO));
WaitIO(SerialIO);
SerialIO->IOSer.io_Command = CMD_WRITE;
SerialIO->IOSer.io_Length = -1;
SerialIO->IOSer.io_Data = (APTR)"Save the whales! ";
DoIO(SerialIO); /* execute write */
SerialIO->IOSer.io_Command = CMD_WRITE;
SerialIO->IOSer.io_Length = -1;
SerialIO->IOSer.io_Data = (APTR)"Life is but a dream.";
DoIO(SerialIO); /* execute write */
SerialIO->IOSer.io_Command = CMD_WRITE;
SerialIO->IOSer.io_Length = -1;
SerialIO->IOSer.io_Data = (APTR)"Row, row, row your boat.";
SerialIO->IOSer.io_Flags = IOF_QUICK;
BeginIO(SerialIO);
if (SerialIO->IOSer.io_Flags & IOF_QUICK )
{
/*
* Quick IO could not happen for some reason; the device processed
* the command normally. In this case BeginIO() acted exactly
* like SendIO().
*/
printf("Quick IO\n");
}
else
{
/* If flag is still set, IO was synchronous and is now finished.
* The IO request was NOT appended a reply port. There is no
* need to remove or WaitIO() for the message.
*/
printf("Regular IO\n");
}
WaitIO(SerialIO);
SerialIO->IOSer.io_Command = CMD_UPDATE;
SerialIO->IOSer.io_Length = -1;
SerialIO->IOSer.io_Data = (APTR)"Row, row, row your boat.";
SerialIO->IOSer.io_Flags = IOF_QUICK;
BeginIO(SerialIO);
if (0 == SerialIO->IOSer.io_Flags & IOF_QUICK )
{
/*
* Quick IO could not happen for some reason; the device processed
* the command normally. In this case BeginIO() acted exactly
* like SendIO().
*/
printf("Regular IO\n");
WaitIO(SerialIO);
}
else
{
/* If flag is still set, IO was synchronous and is now finished.
* The IO request was NOT appended a reply port. There is no
* need to remove or WaitIO() for the message.
*/
printf("Quick IO\n");
}
/* 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 << SerialMP->mp_SigBit;
SerialIO->IOSer.io_Command = CMD_READ;
SerialIO->IOSer.io_Length = READ_BUFFER_SIZE;
SerialIO->IOSer.io_Data = (APTR)&SerialReadBuffer[0];
SendIO(SerialIO);
printf("Sleeping until CTRL-C, CTRL-F, or serial input\n");
while (1)
{
Temp = Wait(WaitMask);
printf("Just woke up (YAWN!)\n");
if (SIGBREAKF_CTRL_C & Temp)
break;
if (CheckIO(SerialIO) ) /* If request is complete... */
{
WaitIO(SerialIO); /* clean up and remove reply */
printf("%ld bytes received\n",SerialIO->IOSer.io_Actual);
break;
}
}
AbortIO(SerialIO); /* Ask device to abort request, if pending */
WaitIO(SerialIO); /* Wait for abort, then clean up */
/*
* If two tasks will use the same device at the same time, it is preferred
* use two OpenDevice() calls and SHARED mode. If exclusive access mode
* is required, then you will need to copy an existing IO request.
*
* Remember that two separate tasks will require two message ports.
*/
SerialWriteMP = CreatePort(0,0);
SerialWriteIO = (struct IOExtSer *)
CreateExtIO( SerialWriteMP,sizeof(struct IOExtSer) );
if (SerialWriteMP && SerialWriteIO )
{
/* Copy over the entire old IO request, then stuff the
* new Message port pointer.
*/
CopyMem( SerialIO, SerialWriteIO, sizeof(struct IOExtSer) );
SerialWriteIO->IOSer.io_Message.mn_ReplyPort = SerialWriteMP;
SerialWriteIO->IOSer.io_Command = CMD_WRITE;
SerialWriteIO->IOSer.io_Length = -1;
SerialWriteIO->IOSer.io_Data = (APTR)"A poet's food is love and fame";
DoIO(SerialWriteIO);
}
if (SerialWriteMP)
DeletePort(SerialWriteMP);
if (SerialWriteIO)
DeleteExtIO(SerialWriteIO);
CloseDevice(SerialIO);
}
DeleteExtIO(SerialIO);
}
else
printf("Unable to create IORequest\n");
DeletePort(SerialMP);
}
else
printf("Unable to create message port\n");
}