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annotate ad9956.c @ 259:6c748ed6a7c5

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Stricter error checks ad9912 ramp frequency function
author Daniele Nicolodi <daniele.nicolodi@obspm.fr>
date Tue, 16 Jun 2015 14:33:36 +0200
parents 5296f3bcd160
children ebbe0f198322
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1 #ifdef _CVI_
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2 #include <ansi_c.h>
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3 #include <toolbox.h>
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4 #else
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5 #include <stdio.h>
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6 #include <stdlib.h>
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7 #include <unistd.h>
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8 #include <string.h>
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9 #include <errno.h>
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10 #include <math.h>
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11 #endif
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12
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13 #include "dds.h"
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14 #include "xsocket.h"
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15 #include "ad9956.h"
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16
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17
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18 int ad9956_init(struct ad9956 *d, const char *hostname, double clock)
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19 {
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20 int r;
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21 char buffer[256];
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22 uint64 value;
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23
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24 #ifdef _CVI_
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25 WSADATA wsdata;
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26 WSAStartup(MAKEWORD(2,2), &wsdata);
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27 #endif
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28
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29 d->sock = xsocket(hostname, 1234);
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30 d->profile = 0;
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31 d->clock = clock;
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32
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33 r = xconnect(d->sock);
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34 if (r < 0)
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35 return r;
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36
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37 /* check compatibility */
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38 r = msend(d->sock, "REVISION", strlen("REVISION"));
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39 if (r < 0)
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40 return r;
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41 r = mrecv(d->sock, buffer, sizeof(buffer));
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42 if (r < 0)
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43 return r;
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44 if (atoi(buffer) != REVISION)
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45 return -EINVAL;
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46
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47 /* disable clock divider */
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48 r = msend(d->sock, "GET CFR2", strlen("GET CFR2"));
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49 if (r < 0)
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50 return r;
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51 r = mrecv(d->sock, buffer, sizeof(buffer));
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52 if (r < 0)
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53 return r;
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54 r = strtouint64(buffer, &value);
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55 if (r < 0)
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56 return r;
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57 value = value | (1ULL << 16);
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58 r = command(d->sock, "SET CFR2 0x%X", value);
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59 if (r < 0)
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60 return r;
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61
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62 return 0;
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63 }
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64
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65
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66 int ad9956_set_frequency(struct ad9956 *d, double f)
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67 {
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68 int r;
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69 uint64 value = ftw(d->clock, f);
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70
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71 r = command(d->sock, "SET PCR%d 0x%llX", d->profile, value);
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72 if (r < 0)
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73 return r;
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74
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75 d->frequency = freq(d->clock, value);
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76
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77 return 0;
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78 }
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79
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80
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81 int ad9956_get_frequency(struct ad9956 *d, double *f)
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82 {
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83 int r, n;
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84 uint64 value;
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85 char buffer[256];
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86
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87 n = snprintf(buffer, sizeof(buffer), "GET PCR%d", d->profile);
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88 r = msend(d->sock, buffer, n);
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89 if (r < 0)
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90 return r;
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91
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92 r = mrecv(d->sock, buffer, sizeof(buffer));
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93 if (r < 0)
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94 return r;
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95
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96 r = strtouint64(buffer, &value);
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97 if (r < 0)
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98 return r;
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99
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100 d->frequency = freq(d->clock, value);
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101 if (f)
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102 *f = d->frequency;
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103
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104 return 0;
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105 }
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106
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107
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108 int ad9956_set_sweep_rate(struct ad9956 *d, double rate)
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109 {
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110 int64 value = (int64)ftw(d->clock, fabs(rate * 0.01));
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111 if (rate < 0.0)
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112 value = -value;
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113
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114 return command(d->sock, "SWEEP SET DFTW %lld", value);
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115 }
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116
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117
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118 int ad9956_sweep_start(struct ad9956 *d)
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119 {
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120 return command(d->sock, "SWEEP START");
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121 }
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122
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123
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124 int ad9956_sweep_stop(struct ad9956 *d)
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125 {
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126 return command(d->sock, "SWEEP STOP");
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127 }