kdcom.h

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/*++
 
Copyright (c) Microsoft Corporation.  All rights reserved.
 
Module Name:
 
    kdcom.h
 
Abstract:
 
    Contains constants used when interacting with 16550-based serial ports.
 
Author:
 
    Bryan M. Willman (bryanwi) 24-Sep-1990
 
Revision History:
 
    John Vert (jvert) 19-Jul-1991
        Moved into HAL
 
--*/
 
#pragma once
 
#define COM1_PORT 0x03F8
#define COM2_PORT 0x02F8
#define COM3_PORT 0x03E8
#define COM4_PORT 0x02E8
 
#define COM_DAT 0x00
#define COM_IEN 0x01           // interrupt enable register
#define COM_FCR 0x02           // fifo control register
#define COM_LCR 0x03           // line control register
#define COM_MCR 0x04           // modem control register
#define COM_LSR 0x05           // line status register
#define COM_MSR 0x06           // modem status register
#define COM_SCR 0x07           // scratch register
#define COM_DLL 0x00           // divisor latch least sig
#define COM_DLM 0x01           // divisor latch most sig
 
#define COM_BI 0x10            // Break detect
#define COM_FE 0x08            // Framing error
#define COM_PE 0x04            // Parity error
#define COM_OE 0x02            // Overrun error
 
#define LC_DLAB 0x80           // LCR divisor latch access bit
 
#define CLOCK_RATE 115200      // Hardware base clock frequency
 
#define MC_DTRRTS   0x03       // Control bits to assert DTR and RTS
#define MS_DSRCTSCD 0xB0       // Status bits for DSR, CTS and CD
#define MS_CD       0x80       // MSR bit to indicate carrier detect
 
#define FC_ENABLE         0x01 // FCR control bit to enable the FIFO
#define FC_CLEAR_RECEIVE  0x02 // FCR control bit to clear receive FIFO
#define FC_CLEAR_TRANSMIT 0x04 // FCR control bit to clear transmit FIFO
 
#define COM_OUTRDY 0x20        // LSR bit to indicate transmitter is empty
#define COM_DATRDY 0x01        // LSR bit to indicate data is available
 
#define BD_150    150
#define BD_300    300
#define BD_600    600
#define BD_1200   1200
#define BD_2400   2400
#define BD_4800   4800
#define BD_9600   9600
#define BD_14400  14400
#define BD_19200  19200
#define BD_56000  56000
#define BD_57600  57600
#define BD_115200 115200
 
//
// This bit controls the loopback testing mode of the device.  Basically
// the outputs are connected to the inputs (and vice versa).
//
 
#define SERIAL_MCR_LOOP 0x10
 
//
// This bit is used for general purpose output.
//
 
#define SERIAL_MCR_OUT1 0x04
 
//
// This bit contains the (complemented) state of the clear to send
// (CTS) line.
//
 
#define SERIAL_MSR_CTS 0x10
 
//
// This bit contains the (complemented) state of the data set ready
// (DSR) line.
//
 
#define SERIAL_MSR_DSR 0x20
 
//
// This bit contains the (complemented) state of the ring indicator
// (RI) line.
//
 
#define SERIAL_MSR_RI 0x40
 
//
// This bit contains the (complemented) state of the data carrier detect
// (DCD) line.
//
 
#define SERIAL_MSR_DCD 0x80
 
#define SERIAL_LSR_NOT_PRESENT 0xff