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