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annotate DDS4xAD9912.c @ 189:e6cb16365d12

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New build
author Daniele Nicolodi <daniele.nicolodi@obspm.fr>
date Mon, 31 Mar 2014 17:03:31 +0200
parents d96f0b04f7fe
children 0e0282010be3
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d96f0b04f7fe Make DDS addres configurable in configuration file. Modernize AD9912 driver.
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1 #include <toolbox.h>
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2 #include <ansi_c.h>
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3 #include <utility.h>
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4 #include <userint.h>
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5 #include <tcpsupp.h>
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6
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7 #include "DDS4xAD9912.h"
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8
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10 void DDS4xAD9912_Init(DDS4xAD9912_Data *dds, const char *host, double clock)
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11 {
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12 memset(dds, 0, sizeof(DDS4xAD9912_Data));
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13 dds->port[0] = 6665;
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14 dds->port[1] = 6666;
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15 dds->port[2] = 6667;
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16 dds->port[3] = 6668;
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17 dds->host = StrDup(host);
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18 dds->clock = clock;
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19 }
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20
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21
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22 //==============================================================================
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23 // DDS4xAD9912_SendCmd
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24 //
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25 // FUNC : envoie une chaine de caracteres sur un port du serveur TCP/IP de la foxboard
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26 // PARAM : DDSNum contient le numero de la DDS (1,2,3 ou 4)
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27 // PARAM : Buffer contenant la chaîne de caractères à envoyer
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28 // RETURN : 0 si la connexion et l'ecriture sur le serveur TCP/IP sont OK
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29 //==============================================================================
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30 static int DDS4xAD9912_SendCmd(DDS4xAD9912_Data *dds, int channel, char *buffer)
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31 {
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32 int rv;
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33 unsigned int sock;
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34
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35 rv = ConnectToTCPServer(&sock, dds->port[channel - 1], dds->host, NULL, 0, 0);
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36 if (rv < 0)
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37 return rv;
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39 rv = ClientTCPWrite(sock, buffer, strlen(buffer) + 1, 0);
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41 DisconnectFromTCPServer(sock);
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43 return rv;
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44 }
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46
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47 //==============================================================================
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48 // DDS4xAD9912_Reset
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49 //
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50 // FUNC : reset des 4 DDS
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51 // PARAM :
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52 // RETURN : 0 si le reset de la DDS 1 , DDS 2, DDS3 et DDS4 est OK
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53 //==============================================================================
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54 int DDS4xAD9912_Reset(DDS4xAD9912_Data *dds)
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55 {
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56 int channel, rv;
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57 char request[256];
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58
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59 sprintf(request, "set;%i;%i", 1, 17);
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61 for (channel = 1; channel < 5; channel++) {
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62 rv = DDS4xAD9912_SendCmd(dds, channel, request);
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63 if (rv < 0) {
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64 MessagePopup("DDS4xAD9912", "Reset failed");
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65 return -1;
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66 }
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67 dds->frequency[channel - 1] = 0.0;
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68 }
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69 return 0;
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70 }
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73 /* convert 64 bit integer into 6 bytes array */
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74 static inline void tobytes(unsigned long long x, unsigned char* bytes)
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75 {
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76 /* 64 bits integer */
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77 for (int i = 0; i < 6; i++)
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78 bytes[i] = (unsigned char)((x >> (i * 8)) & 0xFF);
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79 }
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81
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82 #define WORD(freq, clock) ((double)(1ULL << 48) * (freq / clock))
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83
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84
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85 //==============================================================================
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86 // DDS4xAD9912_SetFreq
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87 //
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88 // FUNC : sort une fréquence sur la DDS1 ,DDS2, DDS3 ou DDS4
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89 // PARAM : DDSNum contient le numero de la DDS (1, 2 , 3 ou 4)
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90 // RETURN : 0 si la connexion et l'ecriture sur le serveur TCP/IP sont OK
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91 //==============================================================================
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92 int DDS4xAD9912_SetFrequency(DDS4xAD9912_Data *dds, int channel, double frequency)
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93 {
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94 int rv;
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95 char request[256];
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96 unsigned char b[6];
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97 unsigned long long ftw = WORD(frequency, dds->clock);
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98
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99 tobytes(ftw, b);
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100
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101 sprintf(request, "set;%i;%i;%i;%i;%i;%i;%i;%i", 0, 10, b[5], b[4], b[3], b[2], b[1], b[0]);
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102 rv = DDS4xAD9912_SendCmd(dds, channel, request);
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103 if (rv < 0) {
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104 MessagePopup("DDS", "SetFrequency function failed");
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105 return -1;
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106 }
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107
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108 sprintf(request, "set;%i;%i", 0, 18);
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109 rv = DDS4xAD9912_SendCmd(dds, channel, request) ;
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110 if (rv < 0) {
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111 MessagePopup("DDS", "IOUpdate function failed");
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112 return -1;
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113 }
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114
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115 dds->frequency[channel - 1] = (double)ftw * dds->clock / (double)(1ULL << 48);
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116 return 0;
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117 }
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108
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120 /*
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121 * ramp DDS frequency from `f1` to `f2` in steps of `fstep`
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122 * with a delay of 0.01 seoconds after each step
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123 */
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124 int DDS4xAD9912_RampFrequency2(DDS4xAD9912_Data *dds, int channel, double f1, double f2, double fstep)
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125 {
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126 const double delay = 0.01;
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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 DDS4xAD9912_SetFrequency(dds, channel, f1);
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132 Delay(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 DDS4xAD9912_SetFrequency(dds, channel, f1);
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139 Delay(delay);
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140 }
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141
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142 /* final adjustment */
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143 DDS4xAD9912_SetFrequency(dds, channel, f2);
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144 return 0;
0
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145 }
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146
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147
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148 /*
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149 * ramp DDS frequency from the current frequency to `f2` in steps
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150 * of `fstep` with a delay of 0.01 seoconds after each step
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151 */
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152 int DDS4xAD9912_RampFrequency(DDS4xAD9912_Data *dds, int channel, double f2, double fstep)
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153 {
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154 double f1 = DDS4xAD9912_GetFrequency(dds, channel);
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155 return DDS4xAD9912_RampFrequency2(dds, channel, f1, f2, fstep);
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156 }
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157
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158
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159 double DDS4xAD9912_GetFrequency(DDS4xAD9912_Data *dds, int channel)
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160 {
142
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161 return dds->frequency[channel - 1];
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162 }
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163