1 | /* |
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2 | * This file implements simple console IO via JTAG UART. |
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3 | * |
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4 | * Based on no_cpu/console.c |
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5 | * COPYRIGHT (c) 1989-1999. |
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6 | * On-Line Applications Research Corporation (OAR). |
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7 | * |
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8 | * Altera-specific code is |
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9 | * COPYRIGHT (c) 2005-2006 Kolja Waschk, rtemsdev/ixo.de |
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10 | * |
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11 | * The license and distribution terms for this file may be |
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12 | * found in the file LICENSE in this distribution or at |
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13 | * http://www.rtems.com/license/LICENSE. |
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14 | * |
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15 | * $Id$ |
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16 | */ |
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17 | |
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18 | #define NO_BSP_INIT |
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19 | |
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20 | #include <bsp.h> |
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21 | #include <rtems/libio.h> |
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22 | |
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23 | /* #define JTAG_UART_REGS ((altera_avalon_jtag_uart_regs*)NIOS2_IO_BASE(JTAG_UART_BASE)) */ |
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24 | |
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25 | #if 0 |
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26 | #define XOFFchar 0x13 |
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27 | #define XONchar 0x11 |
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28 | #endif |
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29 | |
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30 | /* console_initialize |
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31 | * |
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32 | * This routine initializes the console IO driver. |
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33 | * |
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34 | * Input parameters: NONE |
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35 | * |
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36 | * Output parameters: NONE |
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37 | * |
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38 | * Return values: |
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39 | */ |
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40 | |
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41 | rtems_device_driver console_initialize( |
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42 | rtems_device_major_number major, |
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43 | rtems_device_minor_number minor, |
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44 | void *arg |
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45 | ) |
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46 | { |
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47 | rtems_status_code status; |
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48 | |
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49 | status = rtems_io_register_name( |
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50 | "/dev/console", |
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51 | major, |
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52 | (rtems_device_minor_number) 0 |
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53 | ); |
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54 | |
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55 | if (status != RTEMS_SUCCESSFUL) |
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56 | rtems_fatal_error_occurred(status); |
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57 | |
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58 | return RTEMS_SUCCESSFUL; |
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59 | } |
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60 | |
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61 | /* is_character_ready |
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62 | * |
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63 | * If a character is available, this routine reads it and stores |
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64 | * it in |
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65 | * reads the character and stores |
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66 | * |
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67 | * Input parameters: NONE |
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68 | * |
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69 | * Output parameters: NONE |
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70 | * |
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71 | * Return values: |
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72 | */ |
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73 | |
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74 | rtems_boolean is_character_ready( |
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75 | char *ch |
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76 | ) |
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77 | { |
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78 | altera_avalon_jtag_uart_regs *ajur = NIOS2_IO_BASE(JTAG_UART_BASE); |
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79 | unsigned int data = ajur->data; |
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80 | |
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81 | if (data & ALTERA_AVALON_JTAG_UART_DATA_RVALID_MSK) |
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82 | { |
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83 | *ch = (data & ALTERA_AVALON_JTAG_UART_DATA_DATA_MSK) |
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84 | >> ALTERA_AVALON_JTAG_UART_DATA_DATA_OFST; |
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85 | return TRUE; |
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86 | }; |
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87 | |
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88 | return FALSE; |
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89 | } |
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90 | |
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91 | /* inbyte |
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92 | * |
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93 | * This routine reads a character from the SOURCE. |
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94 | * |
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95 | * Input parameters: NONE |
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96 | * |
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97 | * Output parameters: NONE |
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98 | * |
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99 | * Return values: |
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100 | * character read from SOURCE |
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101 | */ |
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102 | |
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103 | char inbyte( void ) |
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104 | { |
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105 | /* |
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106 | * Wait until a character is available. |
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107 | */ |
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108 | char ch; |
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109 | while(!is_character_ready(&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 SOURCE. It may support |
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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 | altera_avalon_jtag_uart_regs *ajur = NIOS2_IO_BASE(JTAG_UART_BASE); |
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129 | /* |
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130 | * Carriage Return/New line translation. |
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131 | */ |
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132 | |
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133 | if ( ch == '\n' ) |
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134 | outbyte( '\r' ); |
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135 | |
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136 | /* |
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137 | * Wait for the transmitter to be ready. |
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138 | * Check for flow control requests and process. |
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139 | * Then output the character. |
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140 | */ |
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141 | |
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142 | while ((ajur->control & ALTERA_AVALON_JTAG_UART_CONTROL_WSPACE_MSK) == 0); |
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143 | |
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144 | ajur->data = ch; |
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145 | } |
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146 | |
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147 | /* |
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148 | * Open entry point |
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149 | */ |
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150 | |
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151 | rtems_device_driver console_open( |
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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 | return RTEMS_SUCCESSFUL; |
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158 | } |
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159 | |
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160 | /* |
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161 | * Close entry point |
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162 | */ |
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163 | |
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164 | rtems_device_driver console_close( |
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165 | rtems_device_major_number major, |
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166 | rtems_device_minor_number minor, |
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167 | void * arg |
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168 | ) |
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169 | { |
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170 | return RTEMS_SUCCESSFUL; |
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171 | } |
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172 | |
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173 | /* |
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174 | * read bytes from the serial port. We only have stdin. |
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175 | */ |
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176 | |
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177 | rtems_device_driver console_read( |
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178 | rtems_device_major_number major, |
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179 | rtems_device_minor_number minor, |
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180 | void * arg |
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181 | ) |
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182 | { |
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183 | rtems_libio_rw_args_t *rw_args; |
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184 | char *buffer; |
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185 | int maximum; |
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186 | int count = 0; |
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187 | |
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188 | rw_args = (rtems_libio_rw_args_t *) arg; |
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189 | |
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190 | buffer = rw_args->buffer; |
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191 | maximum = rw_args->count; |
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192 | |
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193 | for (count = 0; count < maximum; count++) { |
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194 | buffer[ count ] = inbyte(); |
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195 | if (buffer[ count ] == '\n' || buffer[ count ] == '\r') { |
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196 | buffer[ count++ ] = '\n'; |
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197 | break; |
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198 | } |
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199 | } |
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200 | |
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201 | rw_args->bytes_moved = count; |
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202 | return (count >= 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED; |
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203 | } |
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204 | |
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205 | /* |
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206 | * write bytes to the serial port. Stdout and stderr are the same. |
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207 | */ |
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208 | |
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209 | rtems_device_driver console_write( |
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210 | rtems_device_major_number major, |
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211 | rtems_device_minor_number minor, |
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212 | void * arg |
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213 | ) |
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214 | { |
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215 | int count; |
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216 | int maximum; |
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217 | rtems_libio_rw_args_t *rw_args; |
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218 | char *buffer; |
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219 | |
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220 | rw_args = (rtems_libio_rw_args_t *) arg; |
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221 | |
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222 | buffer = rw_args->buffer; |
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223 | maximum = rw_args->count; |
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224 | |
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225 | for (count = 0; count < maximum; count++) { |
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226 | if ( buffer[ count ] == '\n') { |
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227 | outbyte('\r'); |
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228 | } |
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229 | outbyte( buffer[ count ] ); |
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230 | } |
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231 | |
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232 | rw_args->bytes_moved = maximum; |
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233 | return 0; |
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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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