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Examples
ns16550.h
Go to the documentation of this file.
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/*
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* PROJECT: ReactOS ComPort Library
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* LICENSE: BSD - See COPYING.ARM in the top level directory
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* FILE: include/reactos/drivers/serial/ns16550.h
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* PURPOSE: Header for National Semiconductor 16550 UART
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* PROGRAMMERS: ReactOS Portable Systems Group
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*/
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/* INCLUDES *******************************************************************/
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#pragma once
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/* Note: These definitions are the internal definitions used by Microsoft
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Serial Driver (see src/serial/serial/serial.h in WDK source code).
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Linux uses its own, as do most other OS.
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*/
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/* Baud master clock */
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// #define BAUD_CLOCK 1843200
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// #define CLOCKS_PER_BIT 16
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#define CLOCK_RATE 115200
// UART clock rate == BAUD_CLOCK / CLOCKS_PER_BIT
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// Define the spacing between registers.
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#if !defined(SERIAL_REGISTER_STRIDE)
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#define SERIAL_REGISTER_STRIDE 1
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#endif
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/*
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* Offsets of the various registers, from the base register address.
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*/
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#define RECEIVE_BUFFER_REGISTER ((ULONG)((0x00)*SERIAL_REGISTER_STRIDE))
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#define TRANSMIT_HOLDING_REGISTER ((ULONG)((0x00)*SERIAL_REGISTER_STRIDE))
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#define INTERRUPT_ENABLE_REGISTER ((ULONG)((0x01)*SERIAL_REGISTER_STRIDE))
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#define INTERRUPT_IDENT_REGISTER ((ULONG)((0x02)*SERIAL_REGISTER_STRIDE))
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#define FIFO_CONTROL_REGISTER ((ULONG)((0x02)*SERIAL_REGISTER_STRIDE))
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#define LINE_CONTROL_REGISTER ((ULONG)((0x03)*SERIAL_REGISTER_STRIDE))
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#define MODEM_CONTROL_REGISTER ((ULONG)((0x04)*SERIAL_REGISTER_STRIDE))
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#define LINE_STATUS_REGISTER ((ULONG)((0x05)*SERIAL_REGISTER_STRIDE))
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#define MODEM_STATUS_REGISTER ((ULONG)((0x06)*SERIAL_REGISTER_STRIDE))
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#define SCRATCH_REGISTER ((ULONG)((0x07)*SERIAL_REGISTER_STRIDE))
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#define DIVISOR_LATCH_LSB ((ULONG)((0x00)*SERIAL_REGISTER_STRIDE))
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#define DIVISOR_LATCH_MSB ((ULONG)((0x01)*SERIAL_REGISTER_STRIDE))
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#define SERIAL_REGISTER_LENGTH ((ULONG)(7*SERIAL_REGISTER_STRIDE))
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// Length of the interrupt status register.
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#define SERIAL_STATUS_LENGTH ((ULONG)(1*SERIAL_REGISTER_STRIDE))
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/*
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* Start, Data, Parity, Stop number of data bits
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* transmitted in the Serial Data Unit.
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*/
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#define SERIAL_DATA_LENGTH_5 0x00
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#define SERIAL_DATA_LENGTH_6 0x01
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#define SERIAL_DATA_LENGTH_7 0x02
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#define SERIAL_DATA_LENGTH_8 0x03
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/*
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* Masks defining the interrupts that can be enabled or disabled.
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*/
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#define SERIAL_IER_RDA 0x01
// New incoming data available.
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#define SERIAL_IER_THR 0x02
// Space available for another octet in the transmitter.
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#define SERIAL_IER_RLS 0x04
// Error occurred with incoming data.
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#define SERIAL_IER_MS 0x08
// Change occurred in the modem control line.
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/*
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* Interrupt Identification Register masks.
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*/
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#define SERIAL_IIR_RLS 0x06
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#define SERIAL_IIR_RDA 0x04
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#define SERIAL_IIR_CTI 0x0c
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#define SERIAL_IIR_THR 0x02
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#define SERIAL_IIR_MS 0x00
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#define SERIAL_IIR_FIFOS_ENABLED 0xc0
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#define SERIAL_IIR_NO_INTERRUPT_PENDING 0x01
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#define SERIAL_IIR_MUST_BE_ZERO 0x30
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/*
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* Fifo Control Register accessing masks.
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*/
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#define SERIAL_FCR_DISABLE ((UCHAR)0x00)
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#define SERIAL_FCR_ENABLE ((UCHAR)0x01)
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#define SERIAL_FCR_RCVR_RESET ((UCHAR)0x02)
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#define SERIAL_FCR_TXMT_RESET ((UCHAR)0x04)
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#define SERIAL_1_BYTE_HIGH_WATER ((UCHAR)0x00)
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#define SERIAL_4_BYTE_HIGH_WATER ((UCHAR)0x40)
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#define SERIAL_8_BYTE_HIGH_WATER ((UCHAR)0x80)
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#define SERIAL_14_BYTE_HIGH_WATER ((UCHAR)0xc0)
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/*
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* Line Control Register accessing masks.
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*/
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#define SERIAL_LCR_DLAB 0x80
// Divisor Latch Access Bit
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#define SERIAL_LCR_BREAK 0x40
// Send a break
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/*
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* Line Control Register setting bits.
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*/
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#define SERIAL_5_DATA ((UCHAR)0x00)
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#define SERIAL_6_DATA ((UCHAR)0x01)
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#define SERIAL_7_DATA ((UCHAR)0x02)
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#define SERIAL_8_DATA ((UCHAR)0x03)
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#define SERIAL_DATA_MASK ((UCHAR)0x03)
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#define SERIAL_1_STOP ((UCHAR)0x00)
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#define SERIAL_1_5_STOP ((UCHAR)0x04)
// Only valid for 5 data bits
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#define SERIAL_2_STOP ((UCHAR)0x04)
// Not valid for 5 data bits
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#define SERIAL_STOP_MASK ((UCHAR)0x04)
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#define SERIAL_NONE_PARITY ((UCHAR)0x00)
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#define SERIAL_ODD_PARITY ((UCHAR)0x08)
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#define SERIAL_EVEN_PARITY ((UCHAR)0x18)
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#define SERIAL_MARK_PARITY ((UCHAR)0x28)
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#define SERIAL_SPACE_PARITY ((UCHAR)0x38)
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#define SERIAL_PARITY_MASK ((UCHAR)0x38)
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/*
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* Modem Control Register accessing masks.
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*/
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#define SERIAL_MCR_DTR 0x01
// Controls the Data Terminal Ready line
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#define SERIAL_MCR_RTS 0x02
// Controls the Ready To Send line
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#define SERIAL_MCR_OUT1 0x04
// General purpose output
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#define SERIAL_MCR_OUT2 0x08
// General purpose output
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#define SERIAL_MCR_LOOP 0x10
// Controls the loopback testing mode
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#define SERIAL_MCR_TL16C550CAFE 0x20
// Enables Auto Flow Control on a TI TL16C550C
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/*
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* Line Status Register accessing masks.
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*/
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#define SERIAL_LSR_DR 0x01
// Data Ready indicator
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#define SERIAL_LSR_OE 0x02
// Overrun indicator
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#define SERIAL_LSR_PE 0x04
// Parity Error indicator
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#define SERIAL_LSR_FE 0x08
// Framing Error indicator
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#define SERIAL_LSR_BI 0x10
// Break Interrupt indicator
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#define SERIAL_LSR_THRE 0x20
// Transmit Holding Register Empty indicator
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#define SERIAL_LSR_TEMT 0x40
// Transmitter Empty indicator
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#define SERIAL_LSR_FIFOERR 0x80
// Fifo Error indicator
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/*
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* Modem Status Register accessing masks.
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*/
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#define SERIAL_MSR_DCTS 0x01
// Delta Clear To Send
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#define SERIAL_MSR_DDSR 0x02
// Delta Data Set Ready
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#define SERIAL_MSR_TERI 0x04
// Trailing Edge Ring Indicator
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#define SERIAL_MSR_DDCD 0x08
// Delta Data Carrier Detect
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#define SERIAL_MSR_CTS 0x10
// Clear To Send
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#define SERIAL_MSR_DSR 0x20
// Data Set Ready
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#define SERIAL_MSR_RI 0x40
// Ring Indicator
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#define SERIAL_MSR_DCD 0x80
// Data Carrier Detect
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/* EOF */
sdk
include
reactos
drivers
serial
ns16550.h
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