git.zerfleddert.de Git - rigol/blob - commands.c

   1 #include <usb.h>
   2 #include <stdio.h>
   3 #include <time.h>
   4 #include <sys/types.h>
   5 #include <sys/stat.h>
   6 #include <fcntl.h>
   7
   8 #include "png.h"
   9 #include "usbtmc.h"
  10 #include "commands.h"
  11
  12 void do_plot (struct usb_dev_handle *sc)
  13 {
  14         unsigned char ch1[1024], ch2[1024];
  15         int i, l;
  16
  17         static FILE *gnuplot=NULL;
  18         FILE *fp;
  19
  20         l = usbtmc_sendscpi(sc, ":WAV:DATA? CHANEL1", ch1, 1024);
  21
  22         if (l != 1024) {
  23                 printf ("hmm. didnt' get 1024 bytes. \n");
  24         }
  25
  26         l = usbtmc_sendscpi(sc, ":WAV:DATA? CHANNEL2", ch2, 1024);
  27
  28         if (l != 1024) {
  29                 printf ("hmm. didnt' get 1024 bytes. \n");
  30         }
  31
  32         if (!gnuplot) {
  33                 gnuplot = popen ("gnuplot", "w");
  34         }
  35
  36         fp = fopen ("temp.dat", "w");
  37         for (i=0xd4;i<0x32c;i++)
  38                 //for (i=0;i<0x400;i++)
  39                 fprintf (fp, "%d %d\n", 255 - ch1[i], 255 - ch2[i]);
  40         fclose (fp);
  41
  42         fprintf (gnuplot, "plot 'temp.dat' using 1 with lines, 'temp.dat' using 2 with lines\n");
  43         fflush (gnuplot);
  44 }
  45
  46
  47 #define ERROR -1e100
  48
  49 static double get_float_from_scope (struct usb_dev_handle *sc, char *var)
  50 {
  51         unsigned char buf[1024];
  52         double temp;
  53         int l;
  54
  55         l = usbtmc_sendscpi(sc, var, buf, 1024);
  56         if (l > 0) {
  57                 sscanf ((char*)buf, "%lf", &temp);
  58                 return temp;
  59         }
  60         return ERROR;
  61 }
  62
  63
  64 void do_get_buf (struct usb_dev_handle *sc)
  65 {
  66         FILE *fp;
  67         int i, j, l, bp;
  68         char buf[1024];
  69         unsigned char ch1[1024];
  70         unsigned char data[512*1024];
  71         double sampfreq;
  72
  73         usbtmc_sendscpi (sc, ":STOP", NULL, 0);
  74
  75         sampfreq = get_float_from_scope (sc, ":ACQ:SAMP?");
  76
  77         printf ("Got sampling freq: %g\n", sampfreq);
  78
  79         sprintf (buf, ":TIM:SCAL %.15f", 50 / sampfreq);
  80         printf ("sending scale cmd: %s\n", buf);
  81         usbtmc_sendscpi (sc, buf, NULL, 0);
  82
  83         sleep (1);
  84
  85         bp=0;
  86         for (i=-254*1024;i< 254*1024;i += 600) {
  87                 sprintf (buf, ":TIM:OFFSET %.15f", i / sampfreq);
  88                 printf ("Sending offset cmd:  %s\n", buf);
  89                 usbtmc_sendscpi (sc, buf, NULL, 0);
  90
  91                 l = usbtmc_sendscpi(sc, ":WAV:DATA? CHANEL1", ch1, 1024);
  92
  93                 if (l != 1024) {
  94                         printf ("hmm. didnt' get 1024 bytes. \n");
  95                 }
  96
  97                 for (j=0;j<600;j++)
  98                         data[bp++] = ch1[j+0xd4];
  99         }
 100         printf ("Got %d bytes of data. \n", bp);
 101
 102         fp = fopen ("ch1.dump", "w");
 103         fwrite (data, bp, 1, fp);
 104         fclose (fp);
 105
 106         usbtmc_sendscpi (sc, ":TIM:OFFSET 0", NULL, 0);
 107 }
 108
 109 unsigned char* get_lcd(struct usb_dev_handle *sc, int *imglen, int keylock)
 110 {
 111         unsigned char screen[320*234];
 112         unsigned char *png;
 113         int l;
 114
 115         if (keylock) {
 116                 /* Hide "RMT" from screen */
 117                 l = usbtmc_sendscpi(sc, ":KEY:LOCK DISABLE", NULL, 0);
 118                 usleep(30000);
 119         }
 120
 121         l = usbtmc_sendscpi(sc, ":LCD:DATA?", screen, sizeof(screen));
 122
 123         if (l != sizeof(screen)) {
 124                 printf ("hmm. didnt' get %d bytes, but %d\n\n", sizeof(screen), l);
 125         }
 126
 127         png = lcd2png(screen, imglen);
 128
 129         return png;
 130 }
 131
 132 void do_get_screen(struct usb_dev_handle *sc)
 133 {
 134         time_t lt;
 135         char filename[256];
 136         unsigned char *png;
 137         int imglen;
 138         int ret;
 139         int fd;
 140         pid_t display;
 141
 142         png = get_lcd(sc, &imglen, 1);
 143         if (png == NULL) {
 144                 perror("get_lcd");
 145                 return;
 146         }
 147
 148         lt = time(NULL);
 149         strftime(filename, sizeof(filename), "screen_%Y%m%d-%H%M%S.png", localtime(&lt));
 150         fd=open(filename, O_CREAT|O_WRONLY, 0644);
 151         if (fd == -1) {
 152                 perror("open");
 153                 return;
 154         }
 155
 156         while(imglen > 0) {
 157                 ret = write(fd, png, imglen);
 158                 if (ret == -1) {
 159                         perror("write");
 160                         return;
 161                 }
 162                 imglen -= ret;
 163         }
 164         close(fd);
 165         free(png);
 166
 167         printf("Waveform saved as %s\n", filename);
 168
 169         display = fork();
 170         switch(display) {
 171                 case 0:
 172                         execlp("display", "display", filename, NULL);
 173                         exit(0);
 174                         break;
 175                 case -1:
 176                         perror("fork");
 177                         break;
 178                 default:
 179                         break;
 180         }
 181 }
 182
 183 void do_display_screen(struct usb_dev_handle *sc)
 184 {
 185         unsigned char *png;
 186         int imglen;
 187         int ret;
 188         int pipefd[2];
 189         pid_t display;
 190
 191         png = get_lcd(sc, &imglen, 1);
 192         if (png == NULL) {
 193                 perror("get_lcd");
 194                 return;
 195         }
 196
 197         if (pipe(pipefd) == -1) {
 198                 perror("pipe");
 199                 return;
 200         }
 201
 202         display = fork();
 203         switch(display) {
 204                 case 0:
 205                         close(pipefd[1]);
 206                         close(STDIN_FILENO);
 207                         dup2(pipefd[0], STDIN_FILENO);
 208                         execlp("display", "display", "-", NULL);
 209                         exit(0);
 210                         break;
 211                 case -1:
 212                         perror("fork");
 213                         break;
 214                 default:
 215                         close(pipefd[0]);
 216                         while(imglen > 0) {
 217                                 ret = write(pipefd[1], png, imglen);
 218                                 if (ret == -1) {
 219                                         perror("write");
 220                                         exit(EXIT_FAILURE);
 221                                 }
 222                                 imglen -= ret;
 223                         }
 224                         close(pipefd[1]);
 225                         free(png);
 226                         break;
 227         }
 228 }