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172 lines
7.4 KiB
C
172 lines
7.4 KiB
C
/*****************************************************************************/
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/* */
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/* serial.h */
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/* */
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/* Serial communication API */
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/* */
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/* */
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/* */
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/* (C) 2003 Ullrich von Bassewitz */
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/* Römerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#ifndef _SERIAL_H
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#define _SERIAL_H
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/*****************************************************************************/
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/* Data */
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/*****************************************************************************/
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/* Baudrate settings */
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#define SER_BAUD_45_5 0x00
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#define SER_BAUD_50 0x01
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#define SER_BAUD_75 0x02
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#define SER_BAUD_110 0x03
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#define SER_BAUD_134_5 0x04
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#define SER_BAUD_150 0x05
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#define SER_BAUD_300 0x06
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#define SER_BAUD_600 0x07
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#define SER_BAUD_1200 0x08
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#define SER_BAUD_1800 0x09
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#define SER_BAUD_2400 0x0A
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#define SER_BAUD_3600 0x0B
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#define SER_BAUD_4800 0x0C
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#define SER_BAUD_7200 0x0D
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#define SER_BAUD_9600 0x0E
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#define SER_BAUD_19200 0x0F
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#define SER_BAUD_38400 0x10
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#define SER_BAUD_57600 0x11
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#define SER_BAUD_115200 0x12
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#define SER_BAUD_230400 0x13
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/* Data bit settings */
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#define SER_BITS_5 0x00
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#define SER_BITS_6 0x01
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#define SER_BITS_7 0x02
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#define SER_BITS_8 0x03
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/* Stop bit settings */
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#define SER_STOP_1 0x00 /* One stop bit */
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#define SER_STOP_2 0x01 /* Two stop bits */
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/* Parity settings */
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#define SER_PAR_NONE 0x00
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#define SER_PAR_ODD 0x01
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#define SER_PAR_EVEN 0x02
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#define SER_PAR_MARK 0x03
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#define SER_PAR_SPACE 0x04
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/* Handshake settings. The latter two may be combined. */
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#define SER_HS_NONE 0x00 /* No handshake */
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#define SER_HS_HW 0x01 /* Hardware (RTS/CTS) handshake */
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#define SER_HS_SW 0x02 /* Software handshake */
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/* Bit masks to mask out things from the status returned by ser_status.
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* These are 6551 specific and must be mapped by drivers for other chips.
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*/
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#define SER_STATUS_PE 0x01 /* Parity error */
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#define SER_STATUS_FE 0x02 /* Framing error */
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#define SER_STATUS_OE 0x04 /* Overrun error */
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#define SER_STATUS_DCD 0x20 /* NOT data carrier detect */
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#define SER_STATUS_DSR 0x40 /* NOT data set ready */
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/* Error codes returned by all functions */
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#define SER_ERR_OK 0x00 /* Not an error - relax */
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#define SER_ERR_NO_DRIVER 0x01 /* No driver available */
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#define SER_ERR_CANNOT_LOAD 0x02 /* Error loading driver */
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#define SER_ERR_INV_DRIVER 0x03 /* Invalid driver */
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#define SER_ERR_NO_DEVICE 0x04 /* Device (hardware) not found */
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#define SER_ERR_BAUD_UNAVAIL 0x05 /* Baud rate not available */
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#define SER_ERR_NO_DATA 0x06 /* Nothing to read */
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#define SER_ERR_OVERFLOW 0x07 /* No room in send buffer */
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#define SER_ERR_INIT_FAILED 0x08 /* Initialization failed */
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#define SER_ERR_INV_IOCTL 0x09 /* IOCTL not supported */
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/* Struct containing parameters for the serial port */
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struct ser_params {
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unsigned char baudrate; /* Baudrate */
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unsigned char databits; /* Number of data bits */
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unsigned char stopbits; /* Number of stop bits */
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unsigned char parity; /* Parity setting */
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unsigned char handshake; /* Type of handshake to use */
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};
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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unsigned char __fastcall__ ser_load_driver (const char* driver);
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/* Load and install a serial driver. Return an error code. */
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unsigned char __fastcall__ ser_unload (void);
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/* Uninstall, then unload the currently loaded driver. */
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unsigned char __fastcall__ ser_install (void* driver);
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/* Install an already loaded driver. Return an error code. */
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unsigned char __fastcall__ ser_uninstall (void);
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/* Uninstall the currently loaded driver and return an error code.
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* Note: This call does not free allocated memory.
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*/
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unsigned char __fastcall__ ser_open (const struct ser_params* params);
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/* "Open" the port by setting the port parameters and enable interrupts. */
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unsigned char __fastcall__ ser_close (void);
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/* "Close" the port. Clear buffers and and disable interrupts. */
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unsigned char __fastcall__ ser_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 SER_ERR_NO_DATA, so this is not a fatal error.
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*/
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unsigned char __fastcall__ ser_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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* SER_ERR_OVERFLOW if there is no space left in the transmit buffer.
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*/
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unsigned char __fastcall__ ser_status (unsigned char* status);
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/* Return the serial port status. */
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unsigned char __fastcall__ ser_ioctl (unsigned char code, void* data);
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/* Driver specific entry. */
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/* End of serial.h */
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#endif
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