[ac7d5ef0] | 1 | /* |
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| 2 | * This file contains the MVME136 console IO package. |
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| 3 | * |
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| 4 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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| 5 | * On-Line Applications Research Corporation (OAR). |
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| 6 | * All rights assigned to U.S. Government, 1994. |
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| 7 | * |
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| 8 | * This material may be reproduced by or for the U.S. Government pursuant |
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| 9 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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| 10 | * notice must appear in all copies of this file and its derivatives. |
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| 11 | * |
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| 12 | * $Id$ |
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| 13 | */ |
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| 14 | |
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| 15 | #define M136_INIT |
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| 16 | |
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| 17 | #include <rtems.h> |
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| 18 | #include "console.h" |
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| 19 | #include "bsp.h" |
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| 20 | |
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| 21 | /* console_initialize |
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| 22 | * |
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| 23 | * This routine initializes the console IO driver. |
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| 24 | * |
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| 25 | * Input parameters: NONE |
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| 26 | * |
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| 27 | * Output parameters: NONE |
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| 28 | * |
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| 29 | * Return values: |
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| 30 | */ |
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| 31 | |
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| 32 | rtems_device_driver console_initialize( |
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| 33 | rtems_device_major_number major, |
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| 34 | rtems_device_minor_number minor, |
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| 35 | void *arg, |
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| 36 | rtems_id self, |
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| 37 | rtems_unsigned32 *status |
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| 38 | ) |
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| 39 | { |
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| 40 | _Write_m681 = ( struct w_m681_info * ) M681ADDR; |
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| 41 | _Read_m681 = ( struct r_m681_info * ) M681ADDR; |
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| 42 | *status = RTEMS_SUCCESSFUL; |
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| 43 | } |
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| 44 | |
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| 45 | |
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| 46 | /* is_character_ready |
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| 47 | * |
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| 48 | * This routine returns TRUE if a character is available. |
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| 49 | * |
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| 50 | * Input parameters: NONE |
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| 51 | * |
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| 52 | * Output parameters: NONE |
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| 53 | * |
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| 54 | * Return values: |
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| 55 | */ |
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| 56 | |
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| 57 | rtems_boolean is_character_ready( |
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| 58 | char *ch |
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| 59 | ) |
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| 60 | { |
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| 61 | if ( !(_Read_m681->srb & RXRDYB) ) |
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| 62 | return(FALSE); |
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| 63 | |
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| 64 | *ch = _Read_m681->rbb; |
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| 65 | return(TRUE); |
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| 66 | } |
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| 67 | |
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| 68 | /* inbyte |
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| 69 | * |
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| 70 | * This routine reads a character from the UART. |
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| 71 | * |
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| 72 | * Input parameters: NONE |
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| 73 | * |
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| 74 | * Output parameters: NONE |
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| 75 | * |
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| 76 | * Return values: |
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| 77 | * character read from UART |
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| 78 | */ |
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| 79 | |
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| 80 | char inbyte( void ) |
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| 81 | { |
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| 82 | while ( !(_Read_m681->srb & RXRDYB) ); |
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| 83 | return _Read_m681->rbb; |
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| 84 | } |
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| 85 | |
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| 86 | |
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| 87 | /* outbyte |
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| 88 | * |
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| 89 | * This routine transmits a character out the M68681. It supports |
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| 90 | * XON/XOFF flow control. |
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| 91 | * |
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| 92 | * Input parameters: |
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| 93 | * ch - character to be transmitted |
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| 94 | * |
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| 95 | * Output parameters: NONE |
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| 96 | */ |
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| 97 | |
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| 98 | void outbyte( |
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| 99 | char ch |
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| 100 | ) |
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| 101 | { |
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| 102 | while ( ! (_Read_m681->srb & TXRDYB) ) ; |
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| 103 | while ( _Read_m681->srb & RXRDYB ) /* must be an XOFF */ |
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| 104 | if ( _Read_m681->rbb == XOFF ) |
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| 105 | do { |
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| 106 | while ( ! (_Read_m681->srb & RXRDYB) ) ; |
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| 107 | } while ( _Read_m681->rbb != XON ); |
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| 108 | |
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| 109 | _Write_m681->tbb = ch; |
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| 110 | if ( ch == '\n' ) |
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| 111 | outbyte( CR ); |
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| 112 | } |
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| 113 | |
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| 114 | /* |
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| 115 | * __read -- read bytes from the serial port. Ignore fd, since |
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| 116 | * we only have stdin. |
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| 117 | */ |
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| 118 | |
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| 119 | int __read( |
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| 120 | int fd, |
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| 121 | char *buf, |
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| 122 | int nbytes |
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| 123 | ) |
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| 124 | { |
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| 125 | int i = 0; |
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| 126 | |
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| 127 | for (i = 0; i < nbytes; i++) { |
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| 128 | *(buf + i) = inbyte(); |
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| 129 | if ((*(buf + i) == '\n') || (*(buf + i) == '\r')) { |
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| 130 | (*(buf + i++)) = '\n'; |
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| 131 | (*(buf + i)) = 0; |
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| 132 | break; |
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| 133 | } |
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| 134 | } |
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| 135 | return (i); |
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| 136 | } |
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| 137 | |
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| 138 | /* |
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| 139 | * __write -- write bytes to the serial port. Ignore fd, since |
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| 140 | * stdout and stderr are the same. Since we have no filesystem, |
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| 141 | * open will only return an error. |
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| 142 | */ |
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| 143 | |
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| 144 | int __write( |
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| 145 | int fd, |
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| 146 | char *buf, |
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| 147 | int nbytes |
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| 148 | ) |
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| 149 | { |
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| 150 | int i; |
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| 151 | |
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| 152 | for (i = 0; i < nbytes; i++) { |
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| 153 | if (*(buf + i) == '\n') { |
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| 154 | outbyte ('\r'); |
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| 155 | } |
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| 156 | outbyte (*(buf + i)); |
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| 157 | } |
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| 158 | return (nbytes); |
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| 159 | } |
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