[28fa54d9] | 1 | /* |
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| 2 | * This file contains the MVME147 console IO package. |
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| 3 | * |
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[03f2154e] | 4 | * COPYRIGHT (c) 1989-1997. |
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[28fa54d9] | 5 | * On-Line Applications Research Corporation (OAR). |
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[03f2154e] | 6 | * Copyright assigned to U.S. Government, 1994. |
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[28fa54d9] | 7 | * |
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[03f2154e] | 8 | * The license and distribution terms for this file may in |
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| 9 | * the file LICENSE in this distribution or at |
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| 10 | * http://www.OARcorp.com/rtems/license.html. |
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[28fa54d9] | 11 | * |
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| 12 | * MVME147 port for TNI - Telecom Bretagne |
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| 13 | * by Dominique LE CAMPION (Dominique.LECAMPION@enst-bretagne.fr) |
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| 14 | * May 1996 |
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| 15 | * |
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| 16 | * This file was taken from the DMV152 bsp |
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| 17 | * |
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| 18 | * $Id$ |
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| 19 | */ |
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| 20 | |
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| 21 | #define M147_INIT |
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| 22 | |
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| 23 | #include <bsp.h> |
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| 24 | #include <rtems/libio.h> |
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| 25 | #include <z8530.h> |
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| 26 | |
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| 27 | |
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| 28 | /* console_initialize |
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| 29 | * |
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| 30 | * This routine initializes the console IO driver. |
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| 31 | * |
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| 32 | * Input parameters: NONE |
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| 33 | * |
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| 34 | * Output parameters: NONE |
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| 35 | * |
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| 36 | * Return values: |
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| 37 | */ |
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| 38 | |
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| 39 | rtems_device_driver console_initialize( |
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| 40 | rtems_device_major_number major, |
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| 41 | rtems_device_minor_number minor, |
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| 42 | void *arg |
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| 43 | ) |
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| 44 | { |
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| 45 | rtems_status_code status; |
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| 46 | |
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| 47 | status = rtems_io_register_name( |
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| 48 | "/dev/console", |
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| 49 | major, |
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| 50 | (rtems_device_minor_number) 0 |
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| 51 | ); |
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| 52 | |
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| 53 | if (status != RTEMS_SUCCESSFUL) |
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| 54 | rtems_fatal_error_occurred(status); |
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| 55 | |
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| 56 | return RTEMS_SUCCESSFUL; |
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| 57 | } |
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| 58 | |
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| 59 | /* is_character_ready |
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| 60 | * |
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| 61 | * This routine returns TRUE if a character is available. |
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| 62 | * |
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| 63 | * Input parameters: NONE |
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| 64 | * |
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| 65 | * Output parameters: NONE |
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| 66 | * |
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| 67 | * Return values: |
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| 68 | */ |
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| 69 | |
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| 70 | rtems_boolean is_character_ready( |
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| 71 | char *ch |
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| 72 | ) |
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| 73 | { |
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| 74 | rtems_unsigned8 rr_0; |
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| 75 | |
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| 76 | for ( ; ; ) { |
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| 77 | Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 ); |
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| 78 | if ( !(rr_0 & RR_0_RX_DATA_AVAILABLE) ) |
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| 79 | return( FALSE ); |
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| 80 | |
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| 81 | Z8x30_READ_DATA( CONSOLE_DATA, *ch ); |
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| 82 | return( TRUE ); |
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| 83 | } |
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| 84 | } |
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| 85 | |
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| 86 | /* inbyte |
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| 87 | * |
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| 88 | * This routine reads a character from the SCC. |
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| 89 | * |
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| 90 | * Input parameters: NONE |
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| 91 | * |
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| 92 | * Output parameters: NONE |
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| 93 | * |
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| 94 | * Return values: |
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| 95 | * character read from SCC |
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| 96 | */ |
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| 97 | |
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| 98 | char inbyte( void ) |
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| 99 | { |
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| 100 | rtems_unsigned8 rr_0; |
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| 101 | char ch; |
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| 102 | |
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| 103 | for ( ; ; ) { |
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| 104 | Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 ); |
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| 105 | if ( (rr_0 & RR_0_RX_DATA_AVAILABLE) != 0 ) |
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| 106 | break; |
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| 107 | } |
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| 108 | |
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| 109 | Z8x30_READ_DATA( CONSOLE_DATA, ch ); |
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| 110 | return ( ch ); |
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| 111 | } |
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| 112 | |
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| 113 | /* outbyte |
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| 114 | * |
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| 115 | * This routine transmits a character out the SCC. It supports |
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| 116 | * XON/XOFF flow control. |
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| 117 | * |
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| 118 | * Input parameters: |
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| 119 | * ch - character to be transmitted |
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| 120 | * |
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| 121 | * Output parameters: NONE |
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| 122 | */ |
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| 123 | |
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| 124 | void outbyte( |
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| 125 | char ch |
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| 126 | ) |
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| 127 | { |
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| 128 | rtems_unsigned8 rr_0; |
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| 129 | char flow_control; |
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| 130 | |
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| 131 | for ( ; ; ) { |
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| 132 | Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 ); |
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| 133 | if ( (rr_0 & RR_0_TX_BUFFER_EMPTY) != 0 ) |
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| 134 | break; |
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| 135 | } |
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| 136 | |
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| 137 | for ( ; ; ) { |
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| 138 | Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 ); |
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| 139 | if ( (rr_0 & RR_0_RX_DATA_AVAILABLE) == 0 ) |
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| 140 | break; |
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| 141 | |
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| 142 | Z8x30_READ_DATA( CONSOLE_DATA, flow_control ); |
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| 143 | |
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| 144 | if ( flow_control == XOFF ) |
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| 145 | do { |
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| 146 | do { |
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| 147 | Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 ); |
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| 148 | } while ( (rr_0 & RR_0_RX_DATA_AVAILABLE) == 0 ); |
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| 149 | Z8x30_READ_DATA( CONSOLE_DATA, flow_control ); |
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| 150 | } while ( flow_control != XON ); |
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| 151 | } |
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| 152 | |
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| 153 | Z8x30_WRITE_DATA( CONSOLE_DATA, ch ); |
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| 154 | } |
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| 155 | |
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| 156 | /* |
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| 157 | * Open entry point |
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| 158 | */ |
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| 159 | |
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| 160 | rtems_device_driver console_open( |
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| 161 | rtems_device_major_number major, |
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| 162 | rtems_device_minor_number minor, |
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| 163 | void * arg |
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| 164 | ) |
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| 165 | { |
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| 166 | return RTEMS_SUCCESSFUL; |
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| 167 | } |
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| 168 | |
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| 169 | /* |
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| 170 | * Close entry point |
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| 171 | */ |
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| 172 | |
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| 173 | rtems_device_driver console_close( |
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| 174 | rtems_device_major_number major, |
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| 175 | rtems_device_minor_number minor, |
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| 176 | void * arg |
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| 177 | ) |
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| 178 | { |
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| 179 | return RTEMS_SUCCESSFUL; |
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| 180 | } |
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| 181 | |
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| 182 | /* |
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| 183 | * read bytes from the serial port. We only have stdin. |
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| 184 | */ |
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| 185 | |
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| 186 | rtems_device_driver console_read( |
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| 187 | rtems_device_major_number major, |
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| 188 | rtems_device_minor_number minor, |
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| 189 | void * arg |
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| 190 | ) |
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| 191 | { |
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| 192 | rtems_libio_rw_args_t *rw_args; |
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| 193 | char *buffer; |
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| 194 | int maximum; |
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| 195 | int count = 0; |
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| 196 | |
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| 197 | rw_args = (rtems_libio_rw_args_t *) arg; |
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| 198 | |
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| 199 | buffer = rw_args->buffer; |
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| 200 | maximum = rw_args->count; |
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| 201 | |
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| 202 | for (count = 0; count < maximum; count++) { |
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| 203 | buffer[ count ] = inbyte(); |
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| 204 | if (buffer[ count ] == '\n' || buffer[ count ] == '\r') { |
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| 205 | buffer[ count++ ] = '\n'; |
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| 206 | buffer[ count ] = 0; |
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| 207 | break; |
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| 208 | } |
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| 209 | } |
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| 210 | |
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| 211 | rw_args->bytes_moved = count; |
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| 212 | return (count >= 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED; |
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| 213 | } |
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| 214 | |
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| 215 | /* |
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| 216 | * write bytes to the serial port. Stdout and stderr are the same. |
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| 217 | */ |
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| 218 | |
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| 219 | rtems_device_driver console_write( |
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| 220 | rtems_device_major_number major, |
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| 221 | rtems_device_minor_number minor, |
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| 222 | void * arg |
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| 223 | ) |
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| 224 | { |
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| 225 | int count; |
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| 226 | int maximum; |
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| 227 | rtems_libio_rw_args_t *rw_args; |
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| 228 | char *buffer; |
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| 229 | |
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| 230 | rw_args = (rtems_libio_rw_args_t *) arg; |
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| 231 | |
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| 232 | buffer = rw_args->buffer; |
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| 233 | maximum = rw_args->count; |
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| 234 | |
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| 235 | for (count = 0; count < maximum; count++) { |
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| 236 | if ( buffer[ count ] == '\n') { |
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| 237 | outbyte('\r'); |
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| 238 | } |
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| 239 | outbyte( buffer[ count ] ); |
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| 240 | } |
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| 241 | |
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| 242 | rw_args->bytes_moved = maximum; |
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| 243 | return 0; |
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| 244 | } |
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| 245 | |
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| 246 | /* |
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| 247 | * IO Control entry point |
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| 248 | */ |
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| 249 | |
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| 250 | rtems_device_driver console_control( |
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| 251 | rtems_device_major_number major, |
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| 252 | rtems_device_minor_number minor, |
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| 253 | void * arg |
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| 254 | ) |
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| 255 | { |
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| 256 | return RTEMS_SUCCESSFUL; |
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| 257 | } |
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| 258 | |
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