move command functions in own file

[rigol] / commands.c

diff --git a/commands.c b/commands.c
new file mode 100644 (file)
index 0000000..f5b3973
--- /dev/null
+++ b/commands.c
@@ -0,0 +1,167 @@
+#include <usb.h>
+#include <stdio.h>
+#include <time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "png.h"
+#include "usbtmc.h"
+#include "commands.h"
+
+void do_plot (struct usb_dev_handle *sc)
+{
+       unsigned char ch1[1024], ch2[1024];
+       int i, l;
+
+       static FILE *gnuplot=NULL;
+       FILE *fp;
+
+       l = usbtmc_sendscpi(sc, ":WAV:DATA? CHANEL1", ch1, 1024);
+
+       if (l != 1024) {
+               printf ("hmm. didnt' get 1024 bytes. \n"); 
+       }
+
+       l = usbtmc_sendscpi(sc, ":WAV:DATA? CHANNEL2", ch2, 1024);
+
+       if (l != 1024) {
+               printf ("hmm. didnt' get 1024 bytes. \n"); 
+       }
+
+       if (!gnuplot) {
+               gnuplot = popen ("gnuplot", "w"); 
+       }
+
+       fp = fopen ("temp.dat", "w");
+       for (i=0xd4;i<0x32c;i++)
+               //for (i=0;i<0x400;i++)
+               fprintf (fp, "%d %d\n", 255 - ch1[i], 255 - ch2[i]);
+       fclose (fp); 
+
+       fprintf (gnuplot, "plot 'temp.dat' using 1 with lines, 'temp.dat' using 2 with lines\n");
+       fflush (gnuplot);
+}
+
+
+#define ERROR -1e100
+
+static double get_float_from_scope (struct usb_dev_handle *sc, char *var)
+{
+       unsigned char buf[1024];
+       double temp;
+       int l;
+
+       l = usbtmc_sendscpi(sc, var, buf, 1024);
+       if (l > 0) {
+               sscanf ((char*)buf, "%lf", &temp); 
+               return temp;
+       }
+       return ERROR;
+}
+
+
+void do_get_buf (struct usb_dev_handle *sc)
+{
+       FILE *fp;
+       int i, j, l, bp;
+       char buf[1024];
+       unsigned char ch1[1024];
+       unsigned char data[512*1024];
+       double sampfreq;
+
+       usbtmc_sendscpi (sc, ":STOP", NULL, 0); 
+
+       sampfreq = get_float_from_scope (sc, ":ACQ:SAMP?");
+
+       printf ("Got sampling freq: %g\n", sampfreq);  
+
+       sprintf (buf, ":TIM:SCAL %.15f", 50 / sampfreq);
+       printf ("sending scale cmd: %s\n", buf); 
+       usbtmc_sendscpi (sc, buf, NULL, 0);
+
+       sleep (1);
+
+       bp=0;
+       for (i=-254*1024;i< 254*1024;i += 600) {
+               sprintf (buf, ":TIM:OFFSET %.15f", i / sampfreq);
+               printf ("Sending offset cmd:  %s\n", buf); 
+               usbtmc_sendscpi (sc, buf, NULL, 0);
+
+               l = usbtmc_sendscpi(sc, ":WAV:DATA? CHANEL1", ch1, 1024);
+
+               if (l != 1024) {
+                       printf ("hmm. didnt' get 1024 bytes. \n"); 
+               }
+
+               for (j=0;j<600;j++)
+                       data[bp++] = ch1[j+0xd4];
+       }
+       printf ("Got %d bytes of data. \n", bp);
+
+       fp = fopen ("ch1.dump", "w");
+       fwrite (data, bp, 1, fp);
+       fclose (fp); 
+
+       usbtmc_sendscpi (sc, ":TIM:OFFSET 0", NULL, 0);
+}
+
+void do_get_screen(struct usb_dev_handle *sc)
+{
+       unsigned char screen[320*234];
+       time_t lt;
+       char filename[256];
+       unsigned char *png;
+       int imglen;
+       int ret;
+       int l;
+       int fd;
+       pid_t display;
+
+       /* Hide "RMT" from screen */
+       l = usbtmc_sendscpi(sc, ":KEY:LOCK DISABLE", NULL, 0); 
+       usleep(20000);
+
+       l = usbtmc_sendscpi(sc, ":LCD:DATA?", screen, sizeof(screen));
+
+       if (l != sizeof(screen)) {
+               printf ("hmm. didnt' get %d bytes, but %d\n\n", sizeof(screen), l); 
+       }
+
+       png = lcd2png(screen, &imglen);
+
+       lt = time(NULL);
+       strftime(filename, sizeof(filename), "screen_%Y%m%d-%H%M%S.png", localtime(&lt));
+       fd=open(filename, O_CREAT|O_WRONLY, 0644);
+       if (fd == -1) {
+               perror("open");
+               exit(EXIT_FAILURE);
+       }
+
+       while(imglen > 0) {
+               ret = write(fd, png, imglen);
+               if (ret == -1) {
+                       perror("write");
+                       exit(EXIT_FAILURE);
+               }
+               imglen -= ret;
+       }
+       close(fd);
+       free(png);
+
+       printf("Waveform saved as %s\n", filename);
+
+       display = fork();
+       switch(display) {
+               case 0:
+                       execlp("display", "display", filename, NULL);
+                       exit(0);
+                       break;
+               case -1:
+                       perror("fork");
+                       break;
+               default:
+                       break;
+       }
+}
+