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serial.h

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/*!     \file include/kernel/serial.h
 *      \brief Serial/RS232 port driver header.
 *      \author Andrea Righi <drizzt@inwind.it>
 *      \date Last update: 2003-11-08
 *      \note Copyright (&copy;) 2003 Andrea Righi
 */

#ifndef SERIAL_H
#define SERIAL_H

//! Serial port base address (for COM1).
#define PORT1   0x3F8
//! Serial port base address (for COM2).
#define PORT2   0x2F8
//! Serial port base address (for COM3).
#define PORT3   0x3E8
//! Serial port base address (for COM4).
#define PORT4   0x2E8

//! COM1 port address.
#define COM1    PORT1
//! COM2 port address.
#define COM2    PORT2
//! COM3 port address.
#define COM3    PORT3
//! COM4 port address.
#define COM4    PORT4

// --- Baud rates ----------------------------------------------------- //

#define BPS_115200      0x01    //!< 115,200 BPS.
#define BPS_56700       0x02    //!< 56,700  BPS.
#define BPS_38400       0x03    //!< 38,400  BPS.
#define BPS_19200       0x06    //!< 19,200  BPS.
#define BPS_9600        0x0C    //!< 9,600   BPS.
#define BPS_4800        0x18    //!< 4,800   BPS.
#define BPS_2400        0x30    //!< 2,400   BPS.

//! RS232 buffer size.
#define RS232_BUF_DIM   256

// --- Prototypes ----------------------------------------------------- //

void rs232_handler(word port);
void init_rs232(word port, byte divisor);
void close_rs232(word port);
byte rs232_getchar();
void rs232_putchar(byte c);
void rs232_chat();

#endif

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