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167 lines
5.4 KiB
C
167 lines
5.4 KiB
C
/*
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* rs232.h
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*
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* Ullrich von Bassewitz, 19.3.1999
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*
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* This module is based upon the public domain swiftlink module written by
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* Craig Bruce. Thanks a lot!
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*
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*/
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#ifndef _RS232_H
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#define _RS232_h
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/*****************************************************************************/
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/* Data */
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/*****************************************************************************/
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#if defined(__C64__)
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/* Baudrate settings */
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#define RS_BAUD_50 0x00
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#define RS_BAUD_110 0x01
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#define RS_BAUD_134_5 0x02
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#define RS_BAUD_300 0x03
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#define RS_BAUD_600 0x04
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#define RS_BAUD_1200 0x05
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#define RS_BAUD_2400 0x06
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#define RS_BAUD_4800 0x07
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#define RS_BAUD_9600 0x08
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#define RS_BAUD_19200 0x09
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#define RS_BAUD_38400 0x0A
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#define RS_BAUD_57600 0x0B
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#define RS_BAUD_115200 0x0C
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#define RS_BAUD_230400 0x0D
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/* Data bit settings */
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#define RS_BITS_5 0x60
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#define RS_BITS_6 0x40
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#define RS_BITS_7 0x20
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#define RS_BITS_8 0x00
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/* Parity settings */
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#define RS_PAR_NONE 0x00
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#define RS_PAR_ODD 0x20
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#define RS_PAR_EVEN 0x60
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#define RS_PAR_MARK 0xA0
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#define RS_PAR_SPACE 0xE0
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/* Bit masks to mask out things from the status returned by rs232_status */
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#define RS_STATUS_PE 0x01 /* Parity error */
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#define RS_STATUS_FE 0x02 /* Framing error */
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#define RS_STATUS_OVERRUN 0x04 /* Overrun error */
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#define RS_STATUS_RDRF 0x08 /* Receiver data register full */
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#define RS_STATUS_THRE 0x10 /* Transmit holding reg. empty */
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#define RS_STATUS_DCD 0x20 /* NOT data carrier detect */
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#define RS_STATUS_DSR 0x40 /* NOT data set ready */
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#define RS_STATUS_IRQ 0x80 /* IRQ condition */
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#elif defined(__ATARI__)
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/* Baudrate settings */
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#define RS_BAUD_300 0x00
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#define RS_BAUD_45_5 0x01
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#define RS_BAUD_50 0x02
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#define RS_BAUD_56_875 0x03
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#define RS_BAUD_75 0x04
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#define RS_BAUD_110 0x05
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#define RS_BAUD_134_5 0x06
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#define RS_BAUD_150 0x07
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/*#define RS_BAUD_300 0x08 alternative */
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#define RS_BAUD_600 0x09
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#define RS_BAUD_1200 0x0A
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#define RS_BAUD_1800 0x0B
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#define RS_BAUD_2400 0x0C
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#define RS_BAUD_4800 0x0D
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#define RS_BAUD_9600 0x0E
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/* Data bit settings */
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#define RS_BITS_5 0x30
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#define RS_BITS_6 0x20
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#define RS_BITS_7 0x10
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#define RS_BITS_8 0x00
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/* Parity settings */
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#define RS_PAR_NONE 0x00
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#define RS_PAR_ODD 0x05
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#define RS_PAR_EVEN 0x0A
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#define RS_PAR_MARK 0x03
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#define RS_PAR_SPACE 0x0C
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/* Bit masks to mask out things from the status returned by rs232_status */
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#define RS_STATUS_PE 0x20 /* Parity error */
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#define RS_STATUS_FE 0x80 /* Framing error */
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#define RS_STATUS_OVERRUN 0x40 /* Overrun error */
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#define RS_STATUS_RDRF 0x10 /* Receiver data register full */
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#endif /* __ATARI__ section */
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/* Stop bit settings */
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#define RS_STOP_1 0x00
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#define RS_STOP_2 0x80
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/* Error codes returned by all functions */
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#define RS_ERR_OK 0x00 /* Not an error - relax */
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#define RS_ERR_NOT_INITIALIZED 0x01 /* Module not initialized */
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#define RS_ERR_BAUD_TOO_FAST 0x02 /* Cannot handle baud rate */
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#define RS_ERR_BAUD_NOT_AVAIL 0x03 /* Baud rate not available */
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#define RS_ERR_NO_DATA 0x04 /* Nothing to read */
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#define RS_ERR_OVERFLOW 0x05 /* No room in send buffer */
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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unsigned char __fastcall__ rs232_init (char hacked);
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/* Initialize the serial port, install the interrupt handler. The parameter
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* must be true (non zero) for a hacked swiftlink and false (zero) otherwise.
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*/
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unsigned char __fastcall__ rs232_params (unsigned char params, unsigned char parity);
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/* Set the port parameters. Use a combination of the #defined values above. */
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unsigned char __fastcall__ rs232_done (void);
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/* Close the port, deinstall the interrupt hander. You MUST call this function
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* before terminating the program, otherwise the machine may crash later. If
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* in doubt, install an exit handler using atexit(). The function will do
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* nothing, if it was already called.
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*/
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unsigned char __fastcall__ rs232_get (char* b);
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/* Get a character from the serial port. If no characters are available, the
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* function will return RS_ERR_NO_DATA, so this is not a fatal error.
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*/
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unsigned char __fastcall__ rs232_put (char b);
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/* Send a character via the serial port. There is a transmit buffer, but
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* transmitting is not done via interrupt. The function returns
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* RS_ERR_OVERFLOW if there is no space left in the transmit buffer.
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*/
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unsigned char __fastcall__ rs232_pause (void);
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/* Assert flow control and disable interrupts. */
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unsigned char __fastcall__ rs232_unpause (void);
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/* Re-enable interrupts and release flow control */
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unsigned char __fastcall__ rs232_status (unsigned char* status,
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unsigned char* errors);
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/* Return the serial port status. */
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/* End of rs232.h */
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#endif
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