1 | /* |
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2 | * pcmmio_dac command |
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3 | * |
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4 | * COPYRIGHT (c) 1989-2009. |
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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.rtems.com/license/LICENSE. |
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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 | #include "pcmmio_commands.h" |
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15 | #include <rtems/string2.h> |
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16 | |
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17 | #include <stdlib.h> |
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18 | |
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19 | #if defined(TESTING) |
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20 | #define set_dac_voltage(_dac, _voltage) \ |
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21 | /* printf( "Testing: Write %6.4f to to dac %d\n", _voltage, _dac ); */ |
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22 | #endif |
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23 | |
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24 | #define VALIDATE_VOLTAGE(_v) \ |
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25 | if ( (_v) < -10.0 || (_v) > 10.0 ) { \ |
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26 | printf( "Voltage must be between -10.0V and +10.0V\n" ); \ |
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27 | fail = true; \ |
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28 | } |
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29 | |
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30 | char pcmmio_dac_usage[] = |
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31 | "Usage: %s dac voltage\n" |
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32 | " %s dac low high step time_per_step maximum_time\n" |
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33 | "\n" |
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34 | "Where: dac must be 0-7\n" |
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35 | " voltages and step must be -10V to +10V\n" |
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36 | " times are in milliseconds\n" |
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37 | " First form is a single write.\n" |
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38 | " Second form writes a pattern.\n"; |
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39 | |
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40 | #define PRINT_USAGE() \ |
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41 | printf( pcmmio_dac_usage, argv[0], argv[0] ); |
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42 | |
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43 | int main_pcmmio_dac(int argc, char **argv) |
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44 | { |
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45 | int dac; |
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46 | float low_voltage; |
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47 | float high_voltage; |
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48 | float step_voltage; |
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49 | float current_voltage; |
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50 | float current_step; |
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51 | int step_time; |
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52 | int maximum_time; |
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53 | uint32_t step_ticks; |
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54 | bool fail = false; |
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55 | int elapsed; |
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56 | |
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57 | /* |
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58 | * Verify that we have the right number of arguments. |
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59 | */ |
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60 | if ( (argc != 3) && (argc != 7) ) { |
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61 | printf( "Incorrect number of arguments\n" ); |
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62 | PRINT_USAGE(); |
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63 | return -1; |
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64 | } |
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65 | |
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66 | /* |
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67 | * Convert the string arguments into number values |
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68 | */ |
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69 | if ( !rtems_string_to_int( argv[1], &dac, NULL, 0 ) ) { |
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70 | printf( "DAC (%s) is not a number\n", argv[1] ); |
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71 | fail = true; |
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72 | } |
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73 | |
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74 | if ( !rtems_string_to_float( argv[2], &low_voltage, NULL ) ) { |
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75 | printf( "Voltage (%s) is not a number\n", argv[2] ); |
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76 | fail = true; |
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77 | } |
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78 | |
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79 | /* |
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80 | * Validate the output dac and voltage. |
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81 | */ |
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82 | if ( dac < 0 || dac > 7 ) { |
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83 | puts( "DAC number must be 0-7" ); |
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84 | fail = true; |
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85 | } |
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86 | |
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87 | VALIDATE_VOLTAGE( low_voltage ); |
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88 | |
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89 | /* |
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90 | * Now do a single write to the DAC |
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91 | */ |
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92 | if ( argc == 3 ) { |
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93 | if ( fail ) { |
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94 | PRINT_USAGE(); |
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95 | return -1; |
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96 | } |
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97 | printf( "Write %6.4f to to dac %d\n", low_voltage, dac ); |
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98 | set_dac_voltage(dac, low_voltage); |
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99 | } |
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100 | |
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101 | /* |
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102 | * Finish parsing the arguments to do a pattern |
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103 | */ |
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104 | fail = false; |
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105 | |
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106 | if ( !rtems_string_to_float( argv[3], &high_voltage, NULL ) ) { |
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107 | printf( "Voltage (%s) is not a number\n", argv[3] ); |
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108 | fail = true; |
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109 | } |
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110 | |
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111 | VALIDATE_VOLTAGE( high_voltage ); |
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112 | |
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113 | if ( !rtems_string_to_float( argv[4], &step_voltage, NULL ) ) { |
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114 | printf( "Step voltage (%s) is not a number\n", argv[4] ); |
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115 | fail = true; |
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116 | } |
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117 | |
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118 | VALIDATE_VOLTAGE( step_voltage ); |
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119 | |
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120 | if ( step_voltage < 0.0 ) { |
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121 | printf( "Step voltage must be greater than 0\n" ); |
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122 | fail = true; |
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123 | } |
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124 | |
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125 | if ( !rtems_string_to_int( argv[5], &step_time, NULL, 0 ) ) { |
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126 | printf( "Step time (%s) is not a number\n", argv[5] ); |
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127 | fail = true; |
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128 | } |
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129 | |
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130 | if ( !rtems_string_to_int( argv[6], &maximum_time, NULL, 0 ) ) { |
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131 | printf( "Maximum time (%s) is not a number\n", argv[6] ); |
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132 | fail = true; |
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133 | } |
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134 | |
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135 | if ( step_time >= maximum_time ) { |
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136 | printf( |
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137 | "Step time (%d) must be less than maximum time (%d)\n", |
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138 | step_time, |
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139 | maximum_time |
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140 | ); |
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141 | fail = true; |
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142 | } |
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143 | |
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144 | if ( step_time < 0 ) { |
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145 | printf( "Step time must be greater than 0\n" ); |
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146 | fail = true; |
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147 | } |
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148 | |
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149 | if ( maximum_time < 0 ) { |
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150 | printf( "Maximum time must be greater than 0\n" ); |
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151 | fail = true; |
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152 | } |
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153 | |
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154 | /* |
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155 | * Now write the pattern to the DAC |
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156 | */ |
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157 | |
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158 | if ( fail ) { |
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159 | PRINT_USAGE(); |
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160 | return -1; |
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161 | } |
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162 | |
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163 | printf( |
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164 | "Write %6.4f-%6.4f step=%6.4f stepTime=%d msecs dac=%d max=%d msecs\n", |
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165 | low_voltage, |
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166 | high_voltage, |
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167 | step_voltage, |
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168 | step_time, |
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169 | dac, |
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170 | maximum_time |
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171 | ); |
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172 | |
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173 | elapsed = 0; |
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174 | step_ticks = RTEMS_MILLISECONDS_TO_TICKS(step_time); |
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175 | current_voltage = low_voltage; |
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176 | current_step = step_voltage; |
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177 | |
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178 | if ( low_voltage > high_voltage ) |
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179 | current_step *= -1.0; |
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180 | |
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181 | while (1) { |
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182 | |
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183 | #if defined(TESTING) |
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184 | printf( "%d: Write %6.4f to to dac %d\n", elapsed, current_voltage, dac ); |
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185 | #endif |
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186 | set_dac_voltage(dac, current_voltage); |
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187 | |
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188 | current_voltage += current_step; |
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189 | if ( current_voltage < low_voltage ) { |
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190 | current_step = step_voltage; |
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191 | current_voltage = low_voltage; |
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192 | } else if ( current_voltage > high_voltage ) { |
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193 | current_step = -1.0 * step_voltage; |
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194 | current_voltage = high_voltage; |
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195 | } |
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196 | |
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197 | elapsed += step_time; |
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198 | if ( elapsed > maximum_time ) |
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199 | break; |
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200 | |
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201 | rtems_task_wake_after( step_ticks ); |
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202 | } |
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203 | |
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204 | return 0; |
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205 | } |
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206 | |
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207 | rtems_shell_cmd_t Shell_PCMMIO_DAC_Command = { |
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208 | "pcmmio_dac", /* name */ |
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209 | "Read PCMMIO Analog Inputs", /* usage */ |
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210 | "pcmmio", /* topic */ |
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211 | main_pcmmio_dac, /* command */ |
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212 | NULL, /* alias */ |
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213 | NULL /* next */ |
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214 | }; |
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215 | |
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216 | rtems_shell_alias_t Shell_PCMMIO_DAC_Alias = { |
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217 | "pcmmio_dac", /* command */ |
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218 | "dac" /* alias */ |
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219 | }; |
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220 | |
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