[e38d987] | 1 | /* |
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| 2 | * 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 <stdio.h> |
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| 15 | #include <stdlib.h> |
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| 16 | #include <rtems.h> |
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| 17 | #include <rtems/shell.h> |
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| 18 | #include <rtems/stringto.h> |
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| 19 | #include "multiio.h" |
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| 20 | |
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| 21 | #define VALIDATE_VOLTAGE(_v) \ |
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| 22 | if ( (_v) < rtems_dac_get_minimum_voltage() || \ |
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| 23 | (_v) > rtems_dac_get_maximum_voltage() ) { \ |
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| 24 | printf( "Voltage must be between %fV and %f\n", \ |
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| 25 | rtems_dac_get_minimum_voltage(), \ |
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| 26 | rtems_dac_get_maximum_voltage()); \ |
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| 27 | fail = true; \ |
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| 28 | } |
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| 29 | |
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| 30 | static char 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-%d\n" |
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| 35 | " voltages and step must be %fV to %fV\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( dac_usage, argv[0], argv[0], \ |
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| 42 | rtems_dac_get_maximum(), \ |
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| 43 | rtems_dac_get_minimum_voltage(), \ |
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| 44 | rtems_dac_get_maximum_voltage()); \ |
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| 45 | |
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| 46 | int main_multiio_dac(int argc, char **argv) |
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| 47 | { |
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| 48 | int dac; |
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| 49 | float low_voltage; |
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| 50 | float high_voltage; |
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| 51 | float step_voltage; |
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| 52 | float current_voltage; |
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| 53 | float current_step; |
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| 54 | int step_time; |
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| 55 | int maximum_time; |
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| 56 | uint32_t step_ticks; |
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| 57 | bool fail = false; |
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| 58 | int elapsed; |
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| 59 | |
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| 60 | /* |
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| 61 | * Verify that we have the right number of arguments. |
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| 62 | */ |
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| 63 | if ( (argc != 3) && (argc != 7) ) { |
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| 64 | printf( "Incorrect number of arguments\n" ); |
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| 65 | PRINT_USAGE(); |
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| 66 | return -1; |
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| 67 | } |
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| 68 | |
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| 69 | /* |
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| 70 | * Convert the string arguments into number values |
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| 71 | */ |
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| 72 | if ( rtems_string_to_int( argv[1], &dac, NULL, 0 ) ) { |
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| 73 | printf( "DAC (%s) is not a number\n", argv[1] ); |
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| 74 | fail = true; |
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| 75 | } |
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| 76 | |
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| 77 | if ( rtems_string_to_float( argv[2], &low_voltage, NULL ) ) { |
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| 78 | printf( "Voltage (%s) is not a number\n", argv[2] ); |
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| 79 | fail = true; |
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| 80 | } |
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| 81 | |
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| 82 | /* |
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| 83 | * Validate the output dac and voltage. |
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| 84 | */ |
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| 85 | if ( dac < 0 || dac > rtems_dac_get_maximum() ) { |
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| 86 | printf( "DAC number must be 0-%d\n", rtems_dac_get_maximum() ); |
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| 87 | fail = true; |
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| 88 | } |
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| 89 | |
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| 90 | VALIDATE_VOLTAGE( low_voltage ); |
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| 91 | |
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| 92 | /* |
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| 93 | * Now do a single write to the DAC |
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| 94 | */ |
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| 95 | if ( argc == 3 ) { |
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| 96 | if ( fail ) { |
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| 97 | PRINT_USAGE(); |
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| 98 | return -1; |
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| 99 | } |
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| 100 | printf( "Write %6.4f to to dac %d\n", low_voltage, dac ); |
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| 101 | rtems_set_dac_voltage(dac, low_voltage); |
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| 102 | return 0; |
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| 103 | } |
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| 104 | |
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| 105 | /* |
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| 106 | * Finish parsing the arguments to do a pattern |
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| 107 | */ |
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| 108 | fail = false; |
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| 109 | |
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| 110 | if ( rtems_string_to_float( argv[3], &high_voltage, NULL ) ) { |
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| 111 | printf( "Voltage (%s) is not a number\n", argv[3] ); |
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| 112 | fail = true; |
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| 113 | } |
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| 114 | |
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| 115 | VALIDATE_VOLTAGE( high_voltage ); |
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| 116 | |
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| 117 | if ( rtems_string_to_float( argv[4], &step_voltage, NULL ) ) { |
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| 118 | printf( "Step voltage (%s) is not a number\n", argv[4] ); |
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| 119 | fail = true; |
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| 120 | } |
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| 121 | |
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| 122 | VALIDATE_VOLTAGE( step_voltage ); |
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| 123 | |
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| 124 | if ( step_voltage < 0.0 ) { |
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| 125 | printf( "Step voltage must be greater than 0\n" ); |
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| 126 | fail = true; |
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| 127 | } |
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| 128 | |
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| 129 | if ( rtems_string_to_int( argv[5], &step_time, NULL, 0 ) ) { |
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| 130 | printf( "Step time (%s) is not a number\n", argv[5] ); |
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| 131 | fail = true; |
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| 132 | } |
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| 133 | |
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| 134 | if ( rtems_string_to_int( argv[6], &maximum_time, NULL, 0 ) ) { |
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| 135 | printf( "Maximum time (%s) is not a number\n", argv[6] ); |
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| 136 | fail = true; |
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| 137 | } |
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| 138 | |
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| 139 | if ( step_time >= maximum_time ) { |
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| 140 | printf( |
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| 141 | "Step time (%d) must be less than maximum time (%d)\n", |
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| 142 | step_time, |
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| 143 | maximum_time |
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| 144 | ); |
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| 145 | fail = true; |
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| 146 | } |
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| 147 | |
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| 148 | if ( step_time < 0 ) { |
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| 149 | printf( "Step time must be greater than 0\n" ); |
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| 150 | fail = true; |
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| 151 | } |
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| 152 | |
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| 153 | if ( maximum_time < 0 ) { |
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| 154 | printf( "Maximum time must be greater than 0\n" ); |
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| 155 | fail = true; |
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| 156 | } |
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| 157 | |
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| 158 | /* |
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| 159 | * Now write the pattern to the DAC |
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| 160 | */ |
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| 161 | |
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| 162 | if ( fail ) { |
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| 163 | PRINT_USAGE(); |
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| 164 | return -1; |
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| 165 | } |
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| 166 | |
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| 167 | printf( |
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| 168 | "Write %6.4f-%6.4f step=%6.4f stepTime=%d msecs dac=%d max=%d msecs\n", |
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| 169 | low_voltage, |
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| 170 | high_voltage, |
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| 171 | step_voltage, |
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| 172 | step_time, |
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| 173 | dac, |
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| 174 | maximum_time |
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| 175 | ); |
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| 176 | |
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| 177 | elapsed = 0; |
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| 178 | step_ticks = RTEMS_MILLISECONDS_TO_TICKS(step_time); |
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| 179 | current_voltage = low_voltage; |
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| 180 | current_step = step_voltage; |
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| 181 | |
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| 182 | if ( low_voltage > high_voltage ) |
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| 183 | current_step *= -1.0; |
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| 184 | |
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| 185 | while (1) { |
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| 186 | |
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| 187 | #if defined(TESTING) |
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| 188 | printf( "%d: Write %6.4f to to dac %d\n", elapsed, current_voltage, dac ); |
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| 189 | #endif |
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| 190 | rtems_set_dac_voltage(dac, current_voltage); |
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| 191 | |
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| 192 | current_voltage += current_step; |
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| 193 | if ( current_voltage < low_voltage ) { |
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| 194 | current_step = step_voltage; |
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| 195 | current_voltage = low_voltage; |
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| 196 | } else if ( current_voltage > high_voltage ) { |
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| 197 | current_step = -1.0 * step_voltage; |
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| 198 | current_voltage = high_voltage; |
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| 199 | } |
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| 200 | |
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| 201 | elapsed += step_time; |
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| 202 | if ( elapsed > maximum_time ) |
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| 203 | break; |
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| 204 | |
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| 205 | rtems_task_wake_after( step_ticks ); |
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| 206 | } |
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| 207 | |
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| 208 | return 0; |
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| 209 | } |
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| 210 | |
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| 211 | rtems_shell_cmd_t Shell_MULTIIO_DAC_Command = { |
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| 212 | "multiio_dac", /* name */ |
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| 213 | "Write Analog Outputs", /* usage */ |
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| 214 | "multiio", /* topic */ |
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| 215 | main_multiio_dac, /* command */ |
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| 216 | NULL, /* alias */ |
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| 217 | NULL /* next */ |
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| 218 | }; |
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| 219 | |
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| 220 | |
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| 221 | rtems_shell_alias_t Shell_MULTIIO_DAC_Alias = { |
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| 222 | "multiio_dac", /* command */ |
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| 223 | "dac" /* alias */ |
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| 224 | }; |
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