1 | /* |
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2 | * This file contains the DMV152 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 D152_INIT |
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16 | |
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17 | #include <bsp.h> |
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18 | #include <rtems/libio.h> |
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19 | |
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20 | /* console_initialize |
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21 | * |
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22 | * This routine initializes the console IO driver. |
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23 | * |
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24 | * Input parameters: NONE |
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25 | * |
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26 | * Output parameters: NONE |
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27 | * |
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28 | * Return values: |
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29 | */ |
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30 | |
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31 | rtems_device_driver console_initialize( |
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32 | rtems_device_major_number major, |
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33 | rtems_device_minor_number minor, |
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34 | void *arg |
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35 | ) |
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36 | { |
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37 | rtems_status_code status; |
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38 | |
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39 | status = rtems_io_register_name( |
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40 | "/dev/console", |
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41 | major, |
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42 | (rtems_device_minor_number) 0 |
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43 | ); |
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44 | |
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45 | if (status != RTEMS_SUCCESSFUL) |
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46 | rtems_fatal_error_occurred(status); |
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47 | |
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48 | return RTEMS_SUCCESSFUL; |
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49 | } |
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50 | |
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51 | /* is_character_ready |
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52 | * |
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53 | * This routine returns TRUE if a character is available. |
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54 | * |
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55 | * Input parameters: NONE |
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56 | * |
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57 | * Output parameters: NONE |
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58 | * |
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59 | * Return values: |
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60 | */ |
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61 | |
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62 | rtems_boolean is_character_ready( |
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63 | char *ch |
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64 | ) |
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65 | { |
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66 | rtems_unsigned8 rr_0; |
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67 | |
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68 | for ( ; ; ) { |
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69 | Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 ); |
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70 | if ( !(rr_0 & RR_0_RX_DATA_AVAILABLE) ) |
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71 | return( FALSE ); |
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72 | |
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73 | Z8x30_READ_DATA( CONSOLE_DATA, *ch ); |
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74 | return( TRUE ); |
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75 | } |
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76 | } |
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77 | |
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78 | /* inbyte |
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79 | * |
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80 | * This routine reads a character from the SCC. |
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81 | * |
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82 | * Input parameters: NONE |
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83 | * |
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84 | * Output parameters: NONE |
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85 | * |
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86 | * Return values: |
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87 | * character read from SCC |
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88 | */ |
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89 | |
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90 | char inbyte( void ) |
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91 | { |
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92 | rtems_unsigned8 rr_0; |
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93 | char ch; |
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94 | |
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95 | for ( ; ; ) { |
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96 | Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 ); |
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97 | if ( (rr_0 & RR_0_RX_DATA_AVAILABLE) != 0 ) |
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98 | break; |
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99 | } |
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100 | |
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101 | Z8x30_READ_DATA( CONSOLE_DATA, ch ); |
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102 | return ( ch ); |
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103 | } |
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104 | |
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105 | /* outbyte |
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106 | * |
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107 | * This routine transmits a character out the SCC. It supports |
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108 | * XON/XOFF flow control. |
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109 | * |
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110 | * Input parameters: |
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111 | * ch - character to be transmitted |
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112 | * |
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113 | * Output parameters: NONE |
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114 | */ |
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115 | |
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116 | void outbyte( |
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117 | char ch |
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118 | ) |
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119 | { |
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120 | rtems_unsigned8 rr_0; |
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121 | char flow_control; |
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122 | |
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123 | for ( ; ; ) { |
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124 | Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 ); |
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125 | if ( (rr_0 & RR_0_TX_BUFFER_EMPTY) != 0 ) |
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126 | break; |
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127 | } |
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128 | |
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129 | for ( ; ; ) { |
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130 | Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 ); |
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131 | if ( (rr_0 & RR_0_RX_DATA_AVAILABLE) == 0 ) |
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132 | break; |
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133 | |
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134 | Z8x30_READ_DATA( CONSOLE_DATA, flow_control ); |
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135 | |
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136 | if ( flow_control == XOFF ) |
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137 | do { |
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138 | do { |
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139 | Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 ); |
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140 | } while ( (rr_0 & RR_0_RX_DATA_AVAILABLE) == 0 ); |
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141 | Z8x30_READ_DATA( CONSOLE_DATA, flow_control ); |
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142 | } while ( flow_control != XON ); |
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143 | } |
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144 | |
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145 | Z8x30_WRITE_DATA( CONSOLE_DATA, ch ); |
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146 | } |
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147 | |
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148 | /* |
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149 | * Open entry point |
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150 | */ |
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151 | |
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152 | rtems_device_driver console_open( |
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153 | rtems_device_major_number major, |
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154 | rtems_device_minor_number minor, |
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155 | void * arg |
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156 | ) |
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157 | { |
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158 | return RTEMS_SUCCESSFUL; |
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159 | } |
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160 | |
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161 | /* |
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162 | * Close entry point |
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163 | */ |
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164 | |
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165 | rtems_device_driver console_close( |
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166 | rtems_device_major_number major, |
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167 | rtems_device_minor_number minor, |
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168 | void * arg |
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169 | ) |
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170 | { |
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171 | return RTEMS_SUCCESSFUL; |
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172 | } |
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173 | |
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174 | /* |
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175 | * read bytes from the serial port. We only have stdin. |
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176 | */ |
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177 | |
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178 | rtems_device_driver console_read( |
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179 | rtems_device_major_number major, |
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180 | rtems_device_minor_number minor, |
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181 | void * arg |
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182 | ) |
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183 | { |
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184 | rtems_libio_rw_args_t *rw_args; |
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185 | char *buffer; |
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186 | int maximum; |
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187 | int count = 0; |
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188 | |
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189 | rw_args = (rtems_libio_rw_args_t *) arg; |
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190 | |
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191 | buffer = rw_args->buffer; |
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192 | maximum = rw_args->count; |
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193 | |
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194 | for (count = 0; count < maximum; count++) { |
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195 | buffer[ count ] = inbyte(); |
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196 | if (buffer[ count ] == '\n' || buffer[ count ] == '\r') { |
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197 | buffer[ count++ ] = '\n'; |
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198 | buffer[ count ] = 0; |
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199 | break; |
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200 | } |
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201 | } |
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202 | |
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203 | rw_args->bytes_moved = count; |
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204 | return (count >= 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED; |
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205 | } |
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206 | |
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207 | /* |
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208 | * write bytes to the serial port. Stdout and stderr are the same. |
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209 | */ |
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210 | |
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211 | rtems_device_driver console_write( |
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212 | rtems_device_major_number major, |
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213 | rtems_device_minor_number minor, |
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214 | void * arg |
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215 | ) |
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216 | { |
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217 | int count; |
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218 | int maximum; |
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219 | rtems_libio_rw_args_t *rw_args; |
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220 | char *buffer; |
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221 | |
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222 | rw_args = (rtems_libio_rw_args_t *) arg; |
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223 | |
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224 | buffer = rw_args->buffer; |
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225 | maximum = rw_args->count; |
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226 | |
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227 | for (count = 0; count < maximum; count++) { |
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228 | if ( buffer[ count ] == '\n') { |
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229 | outbyte('\r'); |
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230 | } |
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231 | outbyte( buffer[ count ] ); |
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232 | } |
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233 | return maximum; |
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234 | } |
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235 | |
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236 | /* |
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237 | * IO Control entry point |
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238 | */ |
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239 | |
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240 | rtems_device_driver console_control( |
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241 | rtems_device_major_number major, |
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242 | rtems_device_minor_number minor, |
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243 | void * arg |
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244 | ) |
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245 | { |
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246 | return RTEMS_SUCCESSFUL; |
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247 | } |
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