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- /*
- * Simple_Serial.c
- *
- * This is an example of using the serial device. First, we will attempt
- * to create a message port with CreateMsgPort(). Next, we will attempt
- * to create the IORequest with CreateExtIO(). Then, we will attempt to
- * open the serial device with OpenDevice(). If successful, we will write
- * a NULL-terminated string to it and reverse our steps. If we encounter
- * an error at any time, we will gracefully exit.
- *
- * 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 <exec/io.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 SAS CTRL/C handling */
- int chkabort(void) { return(0); } /* really */
- #endif
-
- void main(void)
- {
- struct MsgPort *SerialMP; /* pointer to our message port */
- struct IOExtSer *SerialIO; /* pointer to our IORequest */
-
- /* Create the message port */
- if (SerialMP=CreateMsgPort())
- {
- /* Create the IORequest */
- if (SerialIO = (struct IOExtSer *)
- CreateExtIO(SerialMP,sizeof(struct IOExtSer)))
- {
- /* Open the serial device */
- if (OpenDevice(SERIALNAME,0,(struct IORequest *)SerialIO,0L))
-
- /* Inform user that it could not be opened */
- printf("Error: %s did not open\n",SERIALNAME);
- else
- {
- /* device opened, write NULL-terminated string */
- SerialIO->IOSer.io_Length = -1;
- SerialIO->IOSer.io_Data = (APTR)"Amiga ";
- SerialIO->IOSer.io_Command = CMD_WRITE;
- if (DoIO((struct IORequest *)SerialIO)) /* execute write */
- printf("Write failed. Error - %ld\n",SerialIO->IOSer.io_Error);
-
- /* Close the serial device */
- CloseDevice((struct IORequest *)SerialIO);
- }
- /* Delete the IORequest */
- DeleteExtIO(SerialIO);
- }
- else
- /* Inform user that the IORequest could be created */
- printf("Error: Could create IORequest\n");
-
- /* Delete the message port */
- DeleteMsgPort(SerialMP);
- }
- else
- /* Inform user that the message port could not be created */
- printf("Error: Could not create message port\n");
- }
-
- /*
- DoIO() vs. SendIO().
- --------------------
- The above example code contains some simplifications. The DoIO()
- function in the example is not always appropriate for executing the
- CMD_READ or CMD_WRITE commands. DoIO() will not return until the I/O
- request has finished. With serial handshaking enabled, a write
- request may never finish. Read requests will not finish until
- characters arrive at the serial port. The following sections will
- demonstrate a solution using the SendIO() and AbortIO() functions.
-
- */
-