/*****************************************************************************/
/* */
/* serial.h */
/* */
/* Serial communication API */
/* */
/* */
/* */
/* (C) 2003 Ullrich von Bassewitz */
/* Römerstrasse 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* warranty. In no event will the authors be held liable for any damages */
/* arising from the use of this software. */
/* */
/* Permission is granted to anyone to use this software for any purpose, */
/* including commercial applications, and to alter it and redistribute it */
/* freely, subject to the following restrictions: */
/* */
/* 1. The origin of this software must not be misrepresented; you must not */
/* claim that you wrote the original software. If you use this software */
/* in a product, an acknowledgment in the product documentation would be */
/* appreciated but is not required. */
/* 2. Altered source versions must be plainly marked as such, and must not */
/* be misrepresented as being the original software. */
/* 3. This notice may not be removed or altered from any source */
/* distribution. */
/* */
/*****************************************************************************/
#ifndef _SERIAL_H
#define _SERIAL_H
/*****************************************************************************/
/* Data */
/*****************************************************************************/
/* Baudrate settings */
#define SER_BAUD_45_5 0x00
#define SER_BAUD_50 0x01
#define SER_BAUD_75 0x02
#define SER_BAUD_110 0x03
#define SER_BAUD_134_5 0x04
#define SER_BAUD_150 0x05
#define SER_BAUD_300 0x06
#define SER_BAUD_600 0x07
#define SER_BAUD_1200 0x08
#define SER_BAUD_1800 0x09
#define SER_BAUD_2400 0x0A
#define SER_BAUD_3600 0x0B
#define SER_BAUD_4800 0x0C
#define SER_BAUD_7200 0x0D
#define SER_BAUD_9600 0x0E
#define SER_BAUD_19200 0x0F
#define SER_BAUD_38400 0x10
#define SER_BAUD_57600 0x11
#define SER_BAUD_115200 0x12
#define SER_BAUD_230400 0x13
#define SER_BAUD_31250 0x14
#define SER_BAUD_62500 0x15
/* Data bit settings */
#define SER_BITS_5 0x00
#define SER_BITS_6 0x01
#define SER_BITS_7 0x02
#define SER_BITS_8 0x03
/* Stop bit settings */
#define SER_STOP_1 0x00 /* One stop bit */
#define SER_STOP_2 0x01 /* Two stop bits */
/* Parity settings */
#define SER_PAR_NONE 0x00
#define SER_PAR_ODD 0x01
#define SER_PAR_EVEN 0x02
#define SER_PAR_MARK 0x03
#define SER_PAR_SPACE 0x04
/* Handshake settings. The latter two may be combined. */
#define SER_HS_NONE 0x00 /* No handshake */
#define SER_HS_HW 0x01 /* Hardware (RTS/CTS) handshake */
#define SER_HS_SW 0x02 /* Software handshake */
/* Bit masks to mask out things from the status returned by ser_status.
* These are 6551 specific and must be mapped by drivers for other chips.
*/
#define SER_STATUS_PE 0x01 /* Parity error */
#define SER_STATUS_FE 0x02 /* Framing error */
#define SER_STATUS_OE 0x04 /* Overrun error */
#define SER_STATUS_DCD 0x20 /* NOT data carrier detect */
#define SER_STATUS_DSR 0x40 /* NOT data set ready */
/* Error codes returned by all functions */
#define SER_ERR_OK 0x00 /* Not an error - relax */
#define SER_ERR_NO_DRIVER 0x01 /* No driver available */
#define SER_ERR_CANNOT_LOAD 0x02 /* Error loading driver */
#define SER_ERR_INV_DRIVER 0x03 /* Invalid driver */
#define SER_ERR_NO_DEVICE 0x04 /* Device (hardware) not found */
#define SER_ERR_BAUD_UNAVAIL 0x05 /* Baud rate not available */
#define SER_ERR_NO_DATA 0x06 /* Nothing to read */
#define SER_ERR_OVERFLOW 0x07 /* No room in send buffer */
#define SER_ERR_INIT_FAILED 0x08 /* Initialization failed */
#define SER_ERR_INV_IOCTL 0x09 /* IOCTL not supported */
/* Struct containing parameters for the serial port */
struct ser_params {
unsigned char baudrate; /* Baudrate */
unsigned char databits; /* Number of data bits */
unsigned char stopbits; /* Number of stop bits */
unsigned char parity; /* Parity setting */
unsigned char handshake; /* Type of handshake to use */
};
/*****************************************************************************/
/* Code */
/*****************************************************************************/
unsigned char __fastcall__ ser_load_driver (const char* driver);
/* Load and install a serial driver. Return an error code. */
unsigned char __fastcall__ ser_unload (void);
/* Uninstall, then unload the currently loaded driver. */
unsigned char __fastcall__ ser_install (void* driver);
/* Install an already loaded driver. Return an error code. */
unsigned char __fastcall__ ser_uninstall (void);
/* Uninstall the currently loaded driver and return an error code.
* Note: This call does not free allocated memory.
*/
unsigned char __fastcall__ ser_open (const struct ser_params* params);
/* "Open" the port by setting the port parameters and enable interrupts. */
unsigned char __fastcall__ ser_close (void);
/* "Close" the port. Clear buffers and and disable interrupts. */
unsigned char __fastcall__ ser_get (char* b);
/* Get a character from the serial port. If no characters are available, the
* function will return SER_ERR_NO_DATA, so this is not a fatal error.
*/
unsigned char __fastcall__ ser_put (char b);
/* Send a character via the serial port. There is a transmit buffer, but
* transmitting is not done via interrupt. The function returns
* SER_ERR_OVERFLOW if there is no space left in the transmit buffer.
*/
unsigned char __fastcall__ ser_status (unsigned char* status);
/* Return the serial port status. */
unsigned char __fastcall__ ser_ioctl (unsigned char code, void* data);
/* Driver specific entry. */
/* End of serial.h */
#endif