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- /***********************************************************/
- /* */
- /* Amiga C Encyclopedia (ACE) V3.0 Amiga C Club (ACC) */
- /* ------------------------------- ------------------ */
- /* */
- /* Book: ACM Devices Amiga C Club */
- /* Chapter: Serial Device Tulevagen 22 */
- /* File: Example1.c 181 41 LIDINGO */
- /* Author: Anders Bjerin SWEDEN */
- /* Date: 92-04-26 */
- /* Version: 1.00 */
- /* */
- /* Copyright 1992, Anders Bjerin - Amiga C Club (ACC) */
- /* */
- /* Registered members may use this program freely in their */
- /* own commercial/noncommercial programs/articles. */
- /* */
- /***********************************************************/
-
-
-
- /* This program demonstrates how you can use the Serial Device */
- /* to read and write information from and to the Serial Port. */
- /* Since I do not know what you have connected to your serial */
- /* port, this program does not do very much. However, the */
- /* functions are easy to call, so it should not be hard for */
- /* you to change this program into a nice serial communication */
- /* package. */
- /* */
- /* If you have a Sharp JX-100 scanner you can run this program */
- /* since it will try to turn the lamp on and then off again. */
- /* Very useful! (hmmm...) The progarm does not check if there */
- /* is any contact with the scanner, nor if the lamp really was */
- /* turned on or not. */
-
-
-
- #include <exec/types.h> /* STRPTR */
- #include <devices/serial.h> /* Serial Device */
-
-
-
- /* Size of our data buffer: */
- #define MY_BUFFER_SIZE 200
-
- /* Size of the Serial Device's own input buffer: (Must be */
- /* at least 512 bytes, but more is recommended.) */
- #define INPUT_BUFFER_SIZE 1024
-
- /* Read 8 bits/character: */
- #define READ_LENGTH 8
-
- /* Write 8 bits/character: */
- #define WRITE_LENGTH 8
-
- /* Sen 1 stop bit between each character: */
- #define STOP_LENGTH 1
-
- /* Break time in microseconds: (1/2 sec) */
- #define BREAK_TIME 500000
-
- /* Baud rate: */
- #define BAUD_RATE 9600
-
- /* Serial flags: (Parity enabled, checking for end of file characters.) */
- #define SERIAL_FLAGS SERF_PARTY_ON|SERF_EOFMODE
-
- /* Additional flags: (Mark-space parity not used.) */
- #define ADDITIONAL_FLAGS 0
-
-
-
-
-
- /* Declare a pointer to our reply port: */
- struct MsgPort *replymp = NULL;
-
- /* Declare a pointer to our serial request block: */
- struct IOExtSer *serial_req = NULL;
-
- /* Store the serial device error here: */
- UWORD serial_dever = TRUE;
-
- /* Declare our data buffer: */
- BYTE buffer[ MY_BUFFER_SIZE ];
-
-
-
-
- /* Declare our functions: */
-
- /* Our main function: */
- void main();
-
- /* Clears and removes everything nice and neatly: */
- void clean_up( UBYTE error, STRPTR text );
-
- /* Sets serial parameters: */
- UBYTE SetSerParams(
- struct IOExtSer *ioreq,
- ULONG buffer_length,
- ULONG baud_rate,
- ULONG break_time,
- UBYTE read_length,
- UBYTE write_length,
- UBYTE stop_length,
- UBYTE serial_flags,
- ULONG extended_flags,
- UBYTE *eof_chars
- );
-
- /* Prints some information about the error: */
- void SerError( UBYTE error );
-
- /* Sends data to the Serial Port: */
- UBYTE SerWrite(
- struct IOExtSer *ioreq,
- BYTE *data,
- ULONG length
- );
-
- /* Reads data from the Serial Port: */
- UBYTE SerRead(
- struct IOExtSer *ioreq,
- BYTE *data,
- ULONG length
- );
-
-
-
- void main()
- {
- /* Error number: */
- UBYTE error;
-
- /* The eight end-of-file characters: */
- /* They MUST be in descending order! */
- UBYTE eof_char[8]={ 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00, 0x00 };
-
-
-
- /* Get a reply port: (No name, priority 0) */
- replymp = (struct MsgPort *)
- CreatePort( NULL, 0 );
- if( !replymp )
- clean_up( 0, "Could not create the reply port!" );
-
-
-
- /* Create a serial request block: */
- serial_req = (struct IOExtSer *)
- CreateExtIO( replymp, sizeof( struct IOExtSer ) );
- if( !serial_req )
- clean_up( 0, "Not enough memory for the serial request block!" );
-
-
-
- /* Open the Serial Device: */
- serial_dever = OpenDevice( SERIALNAME, 0, serial_req, 0 );
- if( serial_dever )
- clean_up( 0, "Could not open the Serial Device!" );
-
-
-
- error = (UBYTE) SetSerParams(
- serial_req, /* Pointer to our serial request block. */
- INPUT_BUFFER_SIZE, /* Size of the Serial Device's own input buffer. */
- BAUD_RATE, /* Baud rate (read and write). [112 - 292000] */
- BREAK_TIME, /* Break time in microseconds. */
- READ_LENGTH, /* # of bits/char (1-8). Parity not included. */
- WRITE_LENGTH, /* # of bits/char (1-8). Parity not included. */
- STOP_LENGTH, /* # of stop bits between the characters. (1-2) */
- SERIAL_FLAGS, /* Serial flags. */
- ADDITIONAL_FLAGS, /* Additional flags. */
- eof_char /* Pointer to an array of eight end-of-file chr. */
- );
-
- /* OK? */
- if( error )
- clean_up( error, "Could not set the serial parameters!" );
-
-
-
- /* These two bytes will turn on the lamp on a Sharp JX-100 */
- /* color scanner, if it happens to be connected to your */
- /* serial port: (It is a nice scanner...) */
- buffer[ 0 ] = 0x4C;
- buffer[ 1 ] = 0x31;
-
- /* Send 2 bytes to the serial port: */
- error = SerWrite( serial_req, buffer, 2 );
- if( error )
- SerError( error ); /* ERROR */
- else
- printf( "Lamp ON!\n" ); /* OK */
-
-
-
- /* These two bytes will turn off the lamp on the scanner: */
- buffer[ 0 ] = 0x4C;
- buffer[ 1 ] = 0x30;
-
- /* Send 2 bytes to the serial port: */
- error = SerWrite( serial_req, buffer, 2 );
- if( error )
- SerError( error ); /* ERROR */
- else
- printf( "Lamp OFF!\n" ); /* OK */
-
-
-
- /* Clean up and quit: */
- clean_up( 0, "The End!" );
- }
-
-
-
- /* Close and return everything that has been */
- /* opened and allocated before we quit: */
-
- void clean_up( UBYTE error, STRPTR text )
- {
- /* Print some information about the problem: */
- if( error )
- SerError( error );
-
- /* Close the Serial Device: */
- if( !serial_dever )
- CloseDevice( serial_req );
-
- /* Deallocate the serial request block: */
- if( serial_req )
- DeleteExtIO( serial_req, sizeof( struct IOExtSer ) );
-
- /* Remove the replyport: */
- if( replymp )
- DeletePort( replymp);
-
- /* Print the message: */
- printf( "\n%s\n", text );
-
- /* Quit: */
- exit( 0 );
- }
-
-
-
- /* SetSerParams() sets the serial parameters. It initializes a IOExtSer */
- /* structure, and does a SDCMD_SETPARAMS commad. If everything is OK it */
- /* returns NULL, else an error number is returned. */
- /* */
- /* Synopsis: er = SetSerParams( io, bl, br, bt, rl, wl, sl, sf, ef, chr ); */
- /* */
- /* er: (UBYTE) SetSerParams() returns 0 if everything was OK, else */
- /* an error value is returned. See function SerError() for more */
- /* information. */
- /* */
- /* io: (struct IOExtSer *) Pointer to the serial request block you */
- /* want to initialize. */
- /* */
- /* bl: (ULONG) Size of the internal serial buffer which will be used */
- /* when you read data. Must be at least 512 (bytes), but more is */
- /* recommended. The faster and more data you want to read, the */
- /* bigger should the internal buffer be. Some recommended sizes: */
- /* 512, 1024, 2048, 4096, 8192 or 16384. */
- /* */
- /* br: (ULONG) Baud rate. Can be anything between 110 and 292000. */
- /* (Up to 292000 is all right for the hardware, but the software */
- /* can not cope with this, especially since other tasks may be */
- /* running at the same time. You should therefore not use baud */
- /* rates above 31250.) Some recommended values: 110, 300, 1200, */
- /* 2400, 4800, 9600, 19200 or 31250 (the last is a bit though). */
- /* */
- /* bt: (ULONG) Break time in micro seconds. All break requests will */
- /* be set to this time. */
- /* */
- /* rl: (UBYTE) How many bits chould be read for each character. */
- /* Usually 7 or 8 bits. */
- /* */
- /* wl: (UBYTE) How many bits chould be written for each character. */
- /* Usually 7 or 8 bits. */
- /* */
- /* sl: (UBYTE) How many stop bits shoud be written or expected. */
- /* Normally set to 1, but you may set it to 2 if rl/wl = 7. */
- /* */
- /* sf: (UBYTE) You may use the following serial flags: */
- /* */
- /* SERF_PARTY_ON Parity checking/writing is turned on. (The */
- /* sum of all data bits are divided by two, and */
- /* the remainder is the parity bit. If even */
- /* parity is used the bit will be set to 1 if */
- /* the remainder is even. If odd parity is used */
- /* the parity bit will be set to 0 if the */
- /* remainder is even. */
- /* */
- /* SERF_PARTY_ODD Set this flag if you want to use odd parity. */
- /* (The default setting is even parity.) */
- /* */
- /* SERF_7WIRE This flag should only be used when you call */
- /* the OpenDevice(), and not by this function. */
- /* If the flag is set, seven-wire "handshaking" */
- /* will be used. (Default is three-wire.) */
- /* */
- /* SERF_QUEUEDBRK Set this flag if you want break commands to */
- /* be queued along with all other signals. The */
- /* default is that a break command interrupts */
- /* the process immediately. */
- /* */
- /* SERF_RAD_BOOGIE Set this bit if you want high speed mode. */
- /* This can be useful when you want to send and */
- /* receive signals at high speed. When this flag */
- /* is set no parity is used, xON/xOFF handling */
- /* is turned off, no break signals are allowed, */
- /* and finally only eight-bit characters are */
- /* used. */
- /* */
- /* SERF_SHARED Set this falg if you want to allow other */
- /* tasks running at the same time to use the */
- /* serial device. The default is exclusive- */
- /* access. (If some other task is using the */
- /* serial device with the shared bit set, and */
- /* you call this function with exclusive access, */
- /* your request will fail.) */
- /* */
- /* SERF_EOFMODE Set this flag if you want to check for end of */
- /* file characters. (You may use up to eight end */
- /* of file characters, which are specified */
- /* below.) */
- /* */
- /* SERF_XDISABLED xOn/xOFF handling is turned off. (Default is */
- /* on.) */
- /* */
- /* ef: (ULONG) You may use the following extra flags: */
- /* */
- /* SEXTF_MSPON Set this flag if you want to use mark-space */
- /* parity rather than odd-even parity. */
- /* */
- /* SEXTF_MARK If this and the SEXTF_MSPON flag is set, it */
- /* will mark. */
- /* */
- /* chr: (UBYTE *) Pointer to an array containing eight end of file */
- /* characters. If the serial flag "SERF_EOFMODE" is set, the */
- /* serial device will check each character which is sent or */
- /* received, and if it matches one of the end of file characters */
- /* the read/wite request is terminated. */
-
- UBYTE SetSerParams(
- struct IOExtSer *ioreq, /* Pointer to our serial request block. */
- ULONG buffer_length, /* Size of the Serial Device's own input buffer. */
- ULONG baud_rate, /* Baud rate (read and write). [110 - 292000] */
- ULONG break_time, /* Break time in microseconds. */
- UBYTE read_length, /* Nr of bits, read (1-8). Parity not included. */
- UBYTE write_length, /* Nr of bits, write (1-8). Parity not included. */
- UBYTE stop_length, /* Nr of bits, stop (1 or 2). */
- UBYTE serial_flags, /* Serial flags. */
- ULONG extended_flags, /* Additional serial flags. */
- UBYTE *eof_chars /* Pointer to an array containing eight end-of- */
- /* file characters. */
- )
- {
- int loop; /* Used in the loop. */
- UBYTE *ptr; /* Unsigned byte pointer. */
-
-
- /* Set the size of the Serial Device's own input buffer: */
- ioreq->io_RBufLen = buffer_length;
-
- /* Set baud rate: */
- ioreq->io_Baud = baud_rate;
-
- /* Set break time (in microseconds): */
- ioreq->io_BrkTime = break_time;
-
- /* Nr of bits to read per character: */
- ioreq->io_ReadLen = read_length;
-
- /* Nr of bits to write per character: */
- ioreq->io_WriteLen = write_length;
-
- /* Nr of stop bits: (Normally 1, if write_length is */
- /* equal to 7 you may set stop_length to 2.) */
- ioreq->io_StopBits = stop_length;
-
- /* Set serial flags: */
- ioreq->io_SerFlags = serial_flags;
-
- /* Set additional flags: */
- ioreq->io_ExtFlags = extended_flags;
-
-
- /* Get the address of the IOTArray: */
- ptr = (UBYTE *) &(ioreq->io_TermArray);
-
- /* Set all eight end of file characters: */
- for( loop=0; loop < 8; loop++ )
- {
- /* Copy character after character: */
- *ptr = eof_chars[ loop ];
-
- /* Step one byte foreward: */
- ptr++;
- }
-
-
- /* All values have now been set, lets do a SDCMD_SETPARAMS request: */
- ioreq->IOSer.io_Command = SDCMD_SETPARAMS;
-
- /* Do our request, and when complete return 0 if */
- /* OK, else an error value: */
- return( (UBYTE) DoIO( ioreq ) );
- }
-
-
- /* SerError() tells the user what went wrong. You give it the error code */
- /* you received, and SerError() will print a short description of the */
- /* problem. Useful when debugging. */
- /* */
- /* Synopsis: SerError( error ); */
- /* */
- /* error: (UBYTE) The error value you want to have explained. */
-
- void SerError( UBYTE error )
- {
- switch( error )
- {
- case SerErr_DevBusy:
- printf( "Some other task is already using the Serial Device!\n" );
- break;
- case SerErr_BufErr:
- printf( "Not enough memory for the new input buffer!\n" );
- break;
- case SerErr_InvParam:
- printf( "Invalid parameters!\n" );
- break;
- case SerErr_LineErr:
- printf( "Line error!\n" );
- break;
- case SerErr_ParityErr:
- printf( "Problems with the parity!\n" );
- break;
- case SerErr_TimerErr:
- printf( "Timer error!\n" );
- break;
- case SerErr_BufOverflow:
- printf( "Buffer overflowed!\n" );
- break;
- case SerErr_NoDSR:
- printf( "No DSR!\n" );
- break;
- case SerErr_DetectedBreak:
- printf( "A break was detected!\n" );
- break;
- default:
- printf( "An unknown error was reported! Error nr: %d\n", error );
- }
- }
-
-
-
- /* SerWrite() sends some data to the Serial Port. You only have to */
- /* give it a pointer to the data you want to write and tell it how */
- /* many bytes you want to transfer. */
- /* */
- /* Synopsis: error = SerWrite( io, data, length ); */
- /* */
- /* error: (UBYTE) SerWrite() returns 0 if everything was OK, */
- /* else an error number is returned. */
- /* */
- /* io: (struct IOExtSer *) Pointer to an initialized serial */
- /* request block. */
- /* */
- /* data: (BYTE *) Pointer to the first byte of the data you */
- /* want to send (write). */
- /* */
- /* length: (ULONG) How many bytes you want to transfer. If you */
- /* want to continue to send data until we have received */
- /* an end-of-file character, set the length to -1. (Note */
- /* that it will then ONLY stop when it receives one of */
- /* the end-of-file characters.) */
-
- UBYTE SerWrite(
- struct IOExtSer *ioreq, /* Pointer to our serial request block. */
- BYTE *data, /* Pointer to the data you want to send. */
- ULONG length /* The length of the data you want to send. */
- )
- {
- /* We want to send (write) some data: */
- ioreq->IOSer.io_Command = CMD_WRITE;
-
- /* Give the start address of our data: */
- ioreq->IOSer.io_Data = (APTR) data;
-
- /* Set the length of the message: (If you want to continue */
- /* to write until you have received an end-of-file character, */
- /* set length to -1.) */
- ioreq->IOSer.io_Length = length;
-
- /* Do our request, and return 0 if everything is OK, else */
- /* return an error number: */
- return( (UBYTE) DoIO( ioreq ) );
- }
-
-
-
- /* SerRead() reads some data from the Serial Port. You only have to */
- /* give it a pointer to some memory where the data should be stored, */
- /* and tell it how many bytes you want to read. The rest is done */
- /* automatically. */
- /* */
- /* Synopsis: error = SerRead( io, data, length ); */
- /* */
- /* error: (UBYTE) SerRead() returns 0 if everything was OK, eles */
- /* an error number is returned. */
- /* */
- /* io: (struct IOExtSer *) Pointer to an initialized serial */
- /* request block. */
- /* */
- /* data: (BYTE *) Pointer to the memory buffer where you want to */
- /* store all data. */
- /* */
- /* length: (ULONG) How many bytes you want to read. If you want to */
- /* continue to send data until we have received an end-of- */
- /* file character, set the length to -1. (Note that it */
- /* will then ONLY stop when it receives one of the end-of- */
- /* file characters.) */
-
- UBYTE SerRead(
- struct IOExtSer *ioreq, /* Pointer to our serial request block. */
- BYTE *data, /* Where the data should be placed. */
- ULONG length /* How many bytes you want to read. */
- )
- {
- /* We want to read some data: */
- ioreq->IOSer.io_Command = CMD_READ;
-
- /* Give the start address of our data: */
- ioreq->IOSer.io_Data = (APTR) data;
-
- /* Set how many bytes you want to read. (If you want to continue */
- /* to read data until you have received an end-of-file character, */
- /* set length to -1.) */
- ioreq->IOSer.io_Length = length;
-
- /* Do our request, and return 0 if everything is OK, else */
- /* return an error number: */
- return( (UBYTE) DoIO( ioreq ) );
- }
-
-