64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
/* serial.h - mostly useful for DUART serial_init in serial.c */
|
|
|
|
#ifndef __SERIAL_H__
|
|
#define __SERIAL_H__
|
|
|
|
#if 0
|
|
|
|
#define B230400 1
|
|
#define B115200 2
|
|
#define B57600 4
|
|
#define B38400 82
|
|
#define B19200 163
|
|
#define B9600 24
|
|
#define B4800 651
|
|
#define B2400 1302
|
|
#define B1200 2604
|
|
#define B600 5208
|
|
#define B300 10417
|
|
#define B150 20833
|
|
#define B110 28409
|
|
#define BDEFAULT B115200
|
|
|
|
/* this stuff is important to initialize
|
|
the DUART channels */
|
|
|
|
#define Scale 0x01L /* distance between port addresses */
|
|
#define COM1 0x000003f8 /* Keyboard */
|
|
#define COM2 0x000002f8 /* Host */
|
|
|
|
|
|
/* Port Definitions relative to base COM port addresses */
|
|
#define DataIn (0x00*Scale) /* data input port */
|
|
#define DataOut (0x00*Scale) /* data output port */
|
|
#define BaudLsb (0x00*Scale) /* baud rate divisor least significant byte */
|
|
#define BaudMsb (0x01*Scale) /* baud rate divisor most significant byte */
|
|
#define Ier (0x01*Scale) /* interrupt enable register */
|
|
#define Iir (0x02*Scale) /* interrupt identification register */
|
|
#define Lcr (0x03*Scale) /* line control register */
|
|
#define Mcr (0x04*Scale) /* modem control register */
|
|
#define Lsr (0x05*Scale) /* line status register */
|
|
#define Msr (0x06*Scale) /* modem status register */
|
|
|
|
/* Bit Definitions for above ports */
|
|
#define LcrDlab 0x80 /* b7: enable baud rate divisor registers */
|
|
#define LcrDflt 0x03 /* b6-0: no parity, 1 stop, 8 data */
|
|
|
|
#define McrRts 0x02 /* b1: request to send (I am ready to xmit) */
|
|
#define McrDtr 0x01 /* b0: data terminal ready (I am alive ready to rcv) */
|
|
#define McrDflt (McrRts|McrDtr)
|
|
|
|
#define LsrTxD 0x6000 /* b5: transmit holding register empty (i.e. xmit OK!)*/
|
|
/* b6: transmitter empty */
|
|
#define LsrRxD 0x0100 /* b0: received data ready (i.e. got a byte!) */
|
|
|
|
#define MsrRi 0x0040 /* b6: ring indicator (other guy is ready to rcv) */
|
|
#define MsrDsr 0x0020 /* b5: data set ready (other guy is alive ready to rcv */
|
|
#define MsrCts 0x0010 /* b4: clear to send (other guy is ready to rcv) */
|
|
|
|
#define IerRda 0xf /* b0: Enable received data available interrupt */
|
|
|
|
#endif
|
|
|
|
#endif /* __SERIAL_H__ */
|