155 lines
3.4 KiB
C
155 lines
3.4 KiB
C
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/*++ BUILD Version: 0002 // Increment this if a change has global effects
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Module Name:
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jnsnserp.h
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Abstract:
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This header file defines the Alpha/Jensen serial port registers.
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Author:
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David N. Cutler (davec) 28-Apr-1991
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Revision History:
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15-April-1992 John DeRosa [DEC]
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Made this file from David's MIPS version.
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*/
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#ifndef _JNSNSERP_
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#define _JNSNSERP_
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// Define serial port read registers structure.
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typedef struct _SP_READ_REGISTERS {
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UCHAR ReceiveBuffer;
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UCHAR InterruptEnable;
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UCHAR InterruptId;
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UCHAR LineControl;
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UCHAR ModemControl;
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UCHAR LineStatus;
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UCHAR ModemStatus;
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UCHAR ScratchPad;
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} SP_READ_REGISTERS, *PSP_READ_REGISTERS;
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// Define define serial port write registers structure.
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typedef struct _SP_WRITE_REGISTERS {
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UCHAR TransmitBuffer; // also DLL
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UCHAR InterruptEnable; // also DLM
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UCHAR Reserved0;
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UCHAR LineControl;
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UCHAR ModemControl;
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UCHAR Reserved1;
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UCHAR Reserved2;
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UCHAR ScratchPad;
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} SP_WRITE_REGISTERS, *PSP_WRITE_REGISTERS;
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// Define serial port interrupt enable register structure.
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typedef struct _SP_INTERRUPT_ENABLE {
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UCHAR ReceiveEnable : 1;
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UCHAR TransmitEnable : 1;
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UCHAR LineStatusEnable : 1;
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UCHAR ModemStatusEnable : 1;
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UCHAR Reserved1 : 4;
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} SP_INTERRUPT_ENABLE, *PSP_INTERRUPT_ENABLE;
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// Define serial port interrupt id register structure.
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typedef struct _SP_INTERRUPT_ID {
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UCHAR InterruptPending : 1;
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UCHAR Identification : 2;
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UCHAR Reserved : 5;
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} SP_INTERRUPT_ID, *PSP_INTERRUPT_ID;
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// Define serial port line control register structure.
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typedef struct _SP_LINE_CONTROL {
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UCHAR CharacterSize : 2;
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UCHAR StopBits : 1;
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UCHAR ParityEnable : 1;
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UCHAR EvenParity : 1;
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UCHAR StickParity : 1;
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UCHAR SetBreak : 1;
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UCHAR DivisorLatch : 1;
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} SP_LINE_CONTROL, *PSP_LINE_CONTROL;
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// Line status register character size definitions.
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#define FIVE_BITS 0x0 // five bits per character
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#define SIX_BITS 0x1 // six bits per character
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#define SEVEN_BITS 0x2 // seven bits per character
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#define EIGHT_BITS 0x3 // eight bits per character
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// Line speed divisor definition.
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#define BAUD_RATE_9600 12 // divisor for 9600 baud
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#define BAUD_RATE_19200 6 // divisor for 19200 baud
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// Define serial port modem control register structure.
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typedef struct _SP_MODEM_CONTROL {
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UCHAR DataTerminalReady : 1;
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UCHAR RequestToSend : 1;
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UCHAR Reserved1 : 1;
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UCHAR Interrupt : 1;
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UCHAR loopBack : 1;
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UCHAR Reserved2 : 3;
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} SP_MODEM_CONTROL, *PSP_MODEM_CONTROL;
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// Define serial port line status register structure.
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typedef struct _SP_LINE_STATUS {
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UCHAR DataReady : 1;
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UCHAR OverrunError : 1;
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UCHAR ParityError : 1;
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UCHAR FramingError : 1;
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UCHAR BreakIndicator : 1;
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UCHAR TransmitHoldingEmpty : 1;
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UCHAR TransmitEmpty : 1;
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UCHAR Reserved0 : 1;
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} SP_LINE_STATUS, *PSP_LINE_STATUS;
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// Define serial port modem status register structure.
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typedef struct _SP_MODEM_STATUS {
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UCHAR DeltaClearToSend : 1;
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UCHAR DeltaDataSetReady : 1;
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UCHAR TrailingRingIndicator : 1;
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UCHAR DeltaReceiveDetect : 1;
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UCHAR ClearToSend : 1;
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UCHAR DataSetReady : 1;
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UCHAR RingIndicator : 1;
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UCHAR ReceiveDetect : 1;
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} SP_MODEM_STATUS, *PSP_MODEM_STATUS;
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#endif // _JNSNSERP_
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