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Annotation of ntddk/src/vdd/com_vdd/uart.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * UART.h
        !             3:  *
        !             4:  * Definitions for the NS8250 & compatible UARTs
        !             5:  *
        !             6:  * copyright 1990 by Insignia Solutions Ltd. Used by permission.
        !             7:  *
        !             8:  * revision history:
        !             9:  *  24-Dec-1992 John Morgan:  written based on  UART.h  written by Paul Huckle
        !            10:  *
        !            11:  */
        !            12: 
        !            13: #ifndef _UART_H
        !            14: #define _UART_H
        !            15: 
        !            16: /*
        !            17:  * ============================================================================
        !            18:  * Structure/Data definitions
        !            19:  * ============================================================================
        !            20:  */
        !            21: 
        !            22: /* register type definitions follow: */
        !            23: #ifndef WORD_BIT_FIELD
        !            24: #define WORD_BIT_FIELD WORD
        !            25: #endif
        !            26: 
        !            27: #ifndef BYTE_BIT_FIELD
        !            28: #define BYTE_BIT_FIELD BYTE
        !            29: #endif
        !            30: 
        !            31: typedef BYTE BUFFER_REG;
        !            32: 
        !            33: typedef union {
        !            34:    WORD all;
        !            35:    struct {
        !            36:       WORD_BIT_FIELD LSB:8;
        !            37:       WORD_BIT_FIELD MSB:8;
        !            38:    } byte;
        !            39: } DIVISOR_LATCH;
        !            40: 
        !            41: typedef union {
        !            42:     struct {
        !            43:          BYTE_BIT_FIELD data_available:1;
        !            44:          BYTE_BIT_FIELD tx_holding:1;
        !            45:          BYTE_BIT_FIELD rx_line:1;
        !            46:          BYTE_BIT_FIELD modem_status:1;
        !            47:          BYTE_BIT_FIELD pad:4;
        !            48:            } bits;
        !            49:     BYTE all;
        !            50:       } INT_ENABLE_REG;
        !            51: 
        !            52: // define the meaning of IIR values instead of defining its structure
        !            53: #define UART_RLS_INT    6
        !            54: #define UART_RDA_INT    4
        !            55: #define UART_THRE_INT   2
        !            56: #define UART_MS_INT     0
        !            57: #define UART_NO_INT     1
        !            58: 
        !            59: typedef union {
        !            60:     struct {
        !            61:          BYTE_BIT_FIELD word_length:2;
        !            62:          BYTE_BIT_FIELD no_of_stop_bits:1;
        !            63:          BYTE_BIT_FIELD parity_enabled:1;
        !            64:          BYTE_BIT_FIELD even_parity:1;
        !            65:          BYTE_BIT_FIELD stick_parity:1;
        !            66:          BYTE_BIT_FIELD set_break:1;
        !            67:          BYTE_BIT_FIELD DLAB:1;
        !            68:            } bits;
        !            69:     BYTE all;
        !            70:       } LINE_CONTROL_REG;
        !            71: 
        !            72: typedef union {
        !            73:     struct {
        !            74:          BYTE_BIT_FIELD DTR:1;
        !            75:          BYTE_BIT_FIELD RTS:1;
        !            76:          BYTE_BIT_FIELD OUT1:1;
        !            77:          BYTE_BIT_FIELD OUT2:1;
        !            78:          BYTE_BIT_FIELD loop:1;
        !            79:          BYTE_BIT_FIELD pad:3;
        !            80:            } bits;
        !            81:     BYTE all;
        !            82:       } MODEM_CONTROL_REG;
        !            83: 
        !            84: typedef union {
        !            85:     struct {
        !            86:          BYTE_BIT_FIELD data_ready:1;
        !            87:          BYTE_BIT_FIELD overrun_error:1;
        !            88:          BYTE_BIT_FIELD parity_error:1;
        !            89:          BYTE_BIT_FIELD framing_error:1;
        !            90:          BYTE_BIT_FIELD break_interrupt:1;
        !            91:          BYTE_BIT_FIELD tx_holding_empty:1;
        !            92:          BYTE_BIT_FIELD tx_shift_empty:1;
        !            93:          BYTE_BIT_FIELD pad:1;
        !            94:            } bits;
        !            95:     BYTE all;
        !            96:       } LINE_STATUS_REG;
        !            97: 
        !            98: typedef union {
        !            99:     struct {
        !           100:          BYTE_BIT_FIELD delta_CTS:1;
        !           101:          BYTE_BIT_FIELD delta_DSR:1;
        !           102:          BYTE_BIT_FIELD TERI:1;
        !           103:          BYTE_BIT_FIELD delta_RLSD:1;
        !           104:          BYTE_BIT_FIELD CTS:1;
        !           105:          BYTE_BIT_FIELD DSR:1;
        !           106:          BYTE_BIT_FIELD RI:1;
        !           107:          BYTE_BIT_FIELD RLSD:1;
        !           108:            } bits;
        !           109:     BYTE all;
        !           110:       } MODEM_STATUS_REG;
        !           111: 
        !           112: /* register select code definitions follow: */
        !           113: 
        !           114: #define UART_TX_RX     0
        !           115: #define UART_THR       0
        !           116: #define UART_RBR       0
        !           117: #define UART_IER       1
        !           118: #define UART_IIR       2
        !           119: #define UART_LCR       3
        !           120: #define UART_MCR       4
        !           121: #define UART_LSR       5
        !           122: #define UART_MSR       6
        !           123: #define UART_SCRATCH   7
        !           124: 
        !           125: #define UART_PARITY_ON 1   /* line control setting for parity enabled */
        !           126: #define UART_PARITY_OFF 0  /* line control setting for parity disabled */
        !           127: 
        !           128: #define UART_PARITY_ODD 0  /* line control setting for odd parity */
        !           129: #define UART_PARITY_EVEN 1 /* line control setting for even parity */
        !           130: 
        !           131: #define UART_PARITY_STICK 1  /* line control setting for stick(y) parity */
        !           132: 
        !           133: #endif /* _UART_H */

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