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annotate ad9912.c @ 221:c14f5a95850d

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Fix N3 measurement
author Daniele Nicolodi <daniele.nicolodi@obspm.fr>
date Thu, 18 Sep 2014 18:01:56 +0200
parents 9e0c3541104b
children 5296f3bcd160
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1 #ifdef _CVI_
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2 #include <winsock2.h>
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3 #include <ansi_c.h>
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4 #include <toolbox.h>
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5 #else
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6 #include <stdio.h>
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7 #include <stdlib.h>
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8 #include <unistd.h>
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9 #include <errno.h>
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10 #include <string.h>
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11 #include <sys/types.h>
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12 #include <sys/socket.h>
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13 #include <netinet/in.h>
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14 #include <arpa/inet.h>
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15 #include <netdb.h>
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16 #include <ctype.h>
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17 #include <stdarg.h>
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18 #endif
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19
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20 #include "dds.h"
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21 #include "ad9912.h"
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22
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23
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24 int ad9912_init(struct ad9912 *d, const char *hostname, double clock)
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25 {
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26 int n, r;
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27 char buffer[256];
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28 int sock;
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29 struct sockaddr_in addr;
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30 struct hostent* host;
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31
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32 #ifdef _CVI_
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33 WSADATA wsdata;
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34 WSAStartup(MAKEWORD(2,2), &wsdata);
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35 #endif
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36
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37 d->hostname = strdup(hostname);
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38 d->port = 1234;
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39 d->clock = clock;
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40
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41 host = gethostbyname(hostname);
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42 if (host == NULL)
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43 return -1;
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44
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45 sock = socket(AF_INET, SOCK_STREAM, 0);
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46 if (sock < 0)
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47 return -2;
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48
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49 addr.sin_family = host->h_addrtype;
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50 memcpy(&addr.sin_addr.s_addr, host->h_addr_list[0], host->h_length);
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51 addr.sin_port = htons(d->port);
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52
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53 r = connect(sock, (struct sockaddr*)&addr, sizeof(addr));
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54 if (r < 0)
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55 return -3;
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56
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57 d->fd = sock;
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58
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59 /* check compatibility */
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60 n = snprintf(buffer, sizeof(buffer), "REVISION");
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61 r = msend(d->fd, buffer, n);
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62 if (r < 0)
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63 return r;
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64 r = mrecv(d->fd, buffer, sizeof(buffer));
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65 if (r < 0)
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66 return r;
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67 if (atoi(buffer) != REVISION)
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68 return -1;
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69
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70 return 0;
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71 }
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72
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73
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74 int ad9912_set_frequency(struct ad9912 *d, unsigned channel, double f)
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75 {
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76 int r;
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77 uint64 value = ftw(d->clock, f);
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78
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79 /* ad9912 ignores ftw last bit */
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80 value = value & ~1ULL;
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81
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82 r = command(d->fd, "SET CH%d:FTW0 0x%llX", channel, value);
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83 if (r < 0)
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84 return r;
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85
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86 d->frequency[channel] = freq(d->clock, value);
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87
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88 return 0;
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89 }
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90
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91
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92 int ad9912_get_frequency(struct ad9912 *d, unsigned channel, double *f)
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93 {
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94 int r, n;
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95 uint64 value;
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96 char buffer[256];
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97
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98 n = snprintf(buffer, sizeof(buffer), "GET CH%d:FTW0", channel);
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99
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100 r = msend(d->fd, buffer, n);
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101 if (r < 0)
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102 return r;
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103
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104 r = mrecv(d->fd, buffer, sizeof(buffer));
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105 if (r < 0)
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106 return r;
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107
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108 r = strtouint64(buffer, &value);
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109 if (r < 0)
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110 return r;
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111
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112 d->frequency[channel] = freq(d->clock, value);
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113 if (f)
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114 *f = d->frequency[channel];
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115
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116 return 0;
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117 }
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118
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119
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120 /**
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121 * Ramp DDS frequency from @f1 to @f2 in steps @fstep with 0.01
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122 * seconds delay after each step.
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123 */
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124 int ad9912_ramp_frequency2(struct ad9912 *d, unsigned channel, double f1, double f2, double fstep)
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125 {
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126 const int delay = 10000;
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127
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128 /* f2 > f1 */
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129 while ((f2 - f1) > fstep) {
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130 f1 += fstep;
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131 ad9912_set_frequency(d, channel, f1);
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132 usleep(delay);
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133 }
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134
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135 /* f2 < f1 */
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136 while ((f1 - f2) > fstep) {
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137 f1 -= fstep;
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138 ad9912_set_frequency(d, channel, f1);
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139 usleep(delay);
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140 }
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141
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142 /* final adjustment */
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143 ad9912_set_frequency(d, channel, f2);
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144 return 0;
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145 }
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146
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147
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148 int ad9912_ramp_frequency(struct ad9912 *d, unsigned channel, double f, double fstep)
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149 {
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150 return ad9912_ramp_frequency2(d, channel, d->frequency[channel], f, fstep);
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151 }