1 | /* |
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2 | * This file contains the template for a console IO package. |
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3 | * |
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4 | * COPYRIGHT (c) 1989-1999. |
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5 | * On-Line Applications Research Corporation (OAR). |
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6 | * |
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7 | * The license and distribution terms for this file may be |
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8 | * found in the file LICENSE in this distribution or at |
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9 | * http://www.OARcorp.com/rtems/license.html. |
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10 | * |
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11 | * $Id$ |
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12 | */ |
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13 | |
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14 | #define NO_BSP_INIT |
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15 | |
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16 | #include <bsp.h> |
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17 | #include <rtems/libio.h> |
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18 | |
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19 | /* console_initialize |
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20 | * |
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21 | * This routine initializes the console IO driver. |
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22 | * |
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23 | * Input parameters: NONE |
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24 | * |
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25 | * Output parameters: NONE |
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26 | * |
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27 | * Return values: |
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28 | */ |
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29 | |
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30 | rtems_device_driver console_initialize( |
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31 | rtems_device_major_number major, |
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32 | rtems_device_minor_number minor, |
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33 | void *arg |
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34 | ) |
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35 | { |
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36 | rtems_status_code status; |
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37 | |
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38 | status = rtems_io_register_name( |
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39 | "/dev/console", |
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40 | major, |
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41 | (rtems_device_minor_number) 0 |
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42 | ); |
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43 | |
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44 | if (status != RTEMS_SUCCESSFUL) |
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45 | rtems_fatal_error_occurred(status); |
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46 | |
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47 | return RTEMS_SUCCESSFUL; |
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48 | } |
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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 | *ch = '\0'; /* return NULL for no particular reason */ |
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67 | return(TRUE); |
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68 | } |
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69 | |
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70 | /* inbyte |
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71 | * |
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72 | * This routine reads a character from the SOURCE. |
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73 | * |
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74 | * Input parameters: NONE |
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75 | * |
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76 | * Output parameters: NONE |
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77 | * |
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78 | * Return values: |
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79 | * character read from SOURCE |
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80 | */ |
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81 | |
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82 | char inbyte( void ) |
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83 | { |
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84 | /* |
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85 | * If polling, wait until a character is available. |
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86 | */ |
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87 | |
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88 | return '\0'; |
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89 | } |
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90 | |
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91 | /* outbyte |
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92 | * |
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93 | * This routine transmits a character out the SOURCE. It may support |
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94 | * XON/XOFF flow control. |
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95 | * |
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96 | * Input parameters: |
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97 | * ch - character to be transmitted |
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98 | * |
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99 | * Output parameters: NONE |
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100 | */ |
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101 | |
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102 | void outbyte( |
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103 | char ch |
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104 | ) |
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105 | { |
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106 | /* |
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107 | * If polling, wait for the transmitter to be ready. |
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108 | * Check for flow control requests and process. |
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109 | * Then output the character. |
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110 | */ |
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111 | |
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112 | /* |
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113 | * Carriage Return/New line translation. |
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114 | */ |
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115 | |
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116 | if ( ch == '\n' ) |
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117 | outbyte( '\r' ); |
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118 | } |
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119 | |
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120 | |
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121 | /* |
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122 | * Open entry point |
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123 | */ |
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124 | |
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125 | rtems_device_driver console_open( |
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126 | rtems_device_major_number major, |
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127 | rtems_device_minor_number minor, |
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128 | void * arg |
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129 | ) |
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130 | { |
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131 | return RTEMS_SUCCESSFUL; |
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132 | } |
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133 | |
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134 | /* |
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135 | * Close entry point |
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136 | */ |
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137 | |
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138 | rtems_device_driver console_close( |
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139 | rtems_device_major_number major, |
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140 | rtems_device_minor_number minor, |
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141 | void * arg |
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142 | ) |
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143 | { |
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144 | return RTEMS_SUCCESSFUL; |
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145 | } |
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146 | |
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147 | /* |
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148 | * read bytes from the serial port. We only have stdin. |
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149 | */ |
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150 | |
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151 | rtems_device_driver console_read( |
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152 | rtems_device_major_number major, |
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153 | rtems_device_minor_number minor, |
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154 | void * arg |
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155 | ) |
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156 | { |
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157 | rtems_libio_rw_args_t *rw_args; |
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158 | char *buffer; |
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159 | int maximum; |
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160 | int count = 0; |
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161 | |
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162 | rw_args = (rtems_libio_rw_args_t *) arg; |
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163 | |
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164 | buffer = rw_args->buffer; |
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165 | maximum = rw_args->count; |
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166 | |
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167 | for (count = 0; count < maximum; count++) { |
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168 | buffer[ count ] = inbyte(); |
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169 | if (buffer[ count ] == '\n' || buffer[ count ] == '\r') { |
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170 | buffer[ count++ ] = '\n'; |
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171 | break; |
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172 | } |
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173 | } |
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174 | |
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175 | rw_args->bytes_moved = count; |
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176 | return (count >= 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED; |
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177 | } |
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178 | |
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179 | /* |
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180 | * write bytes to the serial port. Stdout and stderr are the same. |
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181 | */ |
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182 | |
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183 | rtems_device_driver console_write( |
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184 | rtems_device_major_number major, |
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185 | rtems_device_minor_number minor, |
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186 | void * arg |
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187 | ) |
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188 | { |
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189 | int count; |
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190 | int maximum; |
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191 | rtems_libio_rw_args_t *rw_args; |
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192 | char *buffer; |
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193 | |
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194 | rw_args = (rtems_libio_rw_args_t *) arg; |
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195 | |
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196 | buffer = rw_args->buffer; |
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197 | maximum = rw_args->count; |
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198 | |
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199 | for (count = 0; count < maximum; count++) { |
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200 | if ( buffer[ count ] == '\n') { |
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201 | outbyte('\r'); |
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202 | } |
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203 | outbyte( buffer[ count ] ); |
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204 | } |
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205 | |
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206 | rw_args->bytes_moved = maximum; |
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207 | return 0; |
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208 | } |
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209 | |
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210 | /* |
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211 | * IO Control entry point |
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212 | */ |
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213 | |
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214 | rtems_device_driver console_control( |
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215 | rtems_device_major_number major, |
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216 | rtems_device_minor_number minor, |
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217 | void * arg |
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218 | ) |
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219 | { |
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220 | return RTEMS_SUCCESSFUL; |
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221 | } |
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