1 | /* |
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2 | * This file contains the Motorola IDP console IO package. |
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3 | * |
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4 | * Written by Doug McBride, Colorado Space Grant College |
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5 | * Based off of the board support packages of RTEMS |
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6 | * |
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7 | * Updated to RTEMS 3.2.0 by Joel Sherrill. |
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8 | * |
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9 | * $Id$ |
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10 | */ |
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11 | |
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12 | #define MIDP_INIT |
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13 | |
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14 | #include <bsp.h> |
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15 | #include <rtems/libio.h> |
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16 | |
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17 | #include <ringbuf.h> |
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18 | |
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19 | Ring_buffer_t Console_Buffer[ 2 ]; |
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20 | |
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21 | rtems_isr C_Receive_ISR(rtems_vector_number vector); |
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22 | |
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23 | /* console_initialize |
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24 | * |
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25 | * This routine initializes the console IO driver. |
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26 | * |
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27 | * Input parameters: NONE |
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28 | * |
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29 | * Output parameters: NONE |
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30 | * |
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31 | * Return values: |
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32 | */ |
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33 | |
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34 | rtems_device_driver console_initialize( |
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35 | rtems_device_major_number major, |
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36 | rtems_device_minor_number minor, |
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37 | void *arg |
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38 | ) |
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39 | { |
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40 | rtems_status_code status; |
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41 | |
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42 | Ring_buffer_Initialize( &Console_Buffer[ 0 ] ); |
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43 | Ring_buffer_Initialize( &Console_Buffer[ 1 ] ); |
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44 | |
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45 | init_pit(); |
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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 | status = rtems_io_register_name( |
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57 | "/dev/tty00", |
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58 | major, |
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59 | (rtems_device_minor_number) 0 |
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60 | ); |
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61 | |
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62 | if (status != RTEMS_SUCCESSFUL) |
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63 | rtems_fatal_error_occurred(status); |
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64 | |
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65 | status = rtems_io_register_name( |
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66 | "/dev/tty01", |
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67 | major, |
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68 | (rtems_device_minor_number) 1 |
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69 | ); |
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70 | |
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71 | if (status != RTEMS_SUCCESSFUL) |
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72 | rtems_fatal_error_occurred(status); |
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73 | |
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74 | return RTEMS_SUCCESSFUL; |
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75 | } |
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76 | |
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77 | |
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78 | /* is_character_ready |
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79 | * |
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80 | * This routine returns TRUE if a character is available. |
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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 | */ |
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88 | |
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89 | rtems_boolean is_character_ready( |
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90 | char *ch, |
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91 | int port |
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92 | ) |
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93 | { |
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94 | if ( Ring_buffer_Is_empty( &Console_Buffer[ port ] ) ) |
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95 | return FALSE; |
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96 | |
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97 | Ring_buffer_Remove_character( &Console_Buffer[ port ], *ch ); |
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98 | return TRUE; |
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99 | } |
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100 | |
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101 | /* quick_char_check |
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102 | * |
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103 | * This routine returns TRUE if a character is available. |
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104 | * It is different from above because it does not disturb the ring buffer |
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105 | * |
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106 | * Input parameters: NONE |
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107 | * |
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108 | * Output parameters: NONE |
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109 | * |
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110 | * Return values: |
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111 | */ |
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112 | |
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113 | rtems_boolean quick_char_check( |
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114 | int port |
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115 | ) |
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116 | { |
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117 | if ( Ring_buffer_Is_empty( &Console_Buffer[ port ] ) ) |
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118 | return FALSE; |
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119 | |
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120 | return TRUE; |
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121 | } |
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122 | |
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123 | /* inbyte |
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124 | * |
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125 | * This routine reads a character from the UART through a buffer. |
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126 | * |
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127 | * Input parameters: NONE |
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128 | * |
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129 | * Output parameters: NONE |
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130 | * |
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131 | * Return values: |
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132 | * character read from UART |
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133 | */ |
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134 | |
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135 | char inbyte( |
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136 | int port |
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137 | ) |
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138 | { |
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139 | unsigned char tmp_char; |
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140 | |
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141 | /* If you come into this routine without checking is_character_ready() first |
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142 | and you want nonblocking code, then it's your own fault */ |
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143 | |
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144 | while ( !is_character_ready( &tmp_char, port ) ); |
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145 | |
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146 | return tmp_char; |
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147 | } |
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148 | |
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149 | |
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150 | /* outbyte |
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151 | * |
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152 | * This routine transmits a character out the M68681. It supports |
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153 | * XON/XOFF flow control. |
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154 | * |
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155 | * Input parameters: |
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156 | * ch - character to be transmitted |
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157 | * |
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158 | * Output parameters: NONE |
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159 | */ |
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160 | |
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161 | void outbyte( |
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162 | char ch, |
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163 | int port |
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164 | ) |
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165 | { |
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166 | switch ( port ) { |
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167 | case 0: |
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168 | transmit_char( ch ); |
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169 | break; |
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170 | case 1: |
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171 | transmit_char_portb( ch ); |
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172 | break; |
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173 | } |
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174 | |
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175 | } |
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176 | |
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177 | /* |
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178 | * Open entry point |
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179 | */ |
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180 | |
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181 | rtems_device_driver console_open( |
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182 | rtems_device_major_number major, |
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183 | rtems_device_minor_number minor, |
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184 | void * arg |
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185 | ) |
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186 | { |
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187 | return RTEMS_SUCCESSFUL; |
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188 | } |
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189 | |
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190 | /* |
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191 | * Close entry point |
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192 | */ |
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193 | |
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194 | rtems_device_driver console_close( |
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195 | rtems_device_major_number major, |
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196 | rtems_device_minor_number minor, |
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197 | void * arg |
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198 | ) |
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199 | { |
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200 | return RTEMS_SUCCESSFUL; |
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201 | } |
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202 | |
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203 | /* |
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204 | * read bytes from the serial port. We only have stdin. |
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205 | */ |
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206 | |
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207 | rtems_device_driver console_read( |
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208 | rtems_device_major_number major, |
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209 | rtems_device_minor_number minor, |
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210 | void * arg |
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211 | ) |
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212 | { |
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213 | rtems_libio_rw_args_t *rw_args; |
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214 | char *buffer; |
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215 | int maximum; |
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216 | int count = 0; |
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217 | |
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218 | rw_args = (rtems_libio_rw_args_t *) arg; |
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219 | |
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220 | buffer = rw_args->buffer; |
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221 | maximum = rw_args->count; |
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222 | |
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223 | if ( minor > 1 ) |
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224 | return RTEMS_INVALID_NUMBER; |
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225 | |
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226 | for (count = 0; count < maximum; count++) { |
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227 | buffer[ count ] = inbyte( minor ); |
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228 | if (buffer[ count ] == '\n' || buffer[ count ] == '\r') { |
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229 | buffer[ count++ ] = '\n'; |
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230 | break; |
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231 | } |
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232 | } |
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233 | |
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234 | rw_args->bytes_moved = count; |
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235 | return (count >= 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED; |
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236 | } |
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237 | |
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238 | /* |
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239 | * write bytes to the serial port. Stdout and stderr are the same. |
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240 | */ |
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241 | |
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242 | rtems_device_driver console_write( |
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243 | rtems_device_major_number major, |
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244 | rtems_device_minor_number minor, |
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245 | void * arg |
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246 | ) |
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247 | { |
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248 | int count; |
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249 | int maximum; |
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250 | rtems_libio_rw_args_t *rw_args; |
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251 | char *buffer; |
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252 | |
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253 | rw_args = (rtems_libio_rw_args_t *) arg; |
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254 | |
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255 | buffer = rw_args->buffer; |
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256 | maximum = rw_args->count; |
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257 | |
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258 | if ( minor > 1 ) |
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259 | return RTEMS_INVALID_NUMBER; |
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260 | |
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261 | for (count = 0; count < maximum; count++) { |
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262 | if ( buffer[ count ] == '\n') { |
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263 | outbyte('\r', minor ); |
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264 | } |
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265 | outbyte( buffer[ count ], minor ); |
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266 | } |
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267 | |
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268 | rw_args->bytes_moved = maximum; |
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269 | return 0; |
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270 | } |
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271 | |
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272 | /* |
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273 | * IO Control entry point |
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274 | */ |
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275 | |
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276 | rtems_device_driver console_control( |
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277 | rtems_device_major_number major, |
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278 | rtems_device_minor_number minor, |
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279 | void * arg |
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280 | ) |
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281 | { |
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282 | return RTEMS_SUCCESSFUL; |
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283 | } |
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