X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/rigol/blobdiff_plain/a626d42748fba1f8d5b33a497eb8e2fbaf85f966..2d17f2ab31a270ebbac95879fef6c7d3176d1960:/rigol.c

diff --git a/rigol.c b/rigol.c
index 23a4b7a..0e9ff9e 100644
--- a/rigol.c
+++ b/rigol.c
@@ -6,166 +6,172 @@ Warning: This code can in theory fubar the communications with the scope to a
 point where the Linux USB-stack seems to get confused. Do a 
 rmmod uhci_hcd; modprobe uhci_hcd
 (or alternately: use ohci_hcd) if that happens and you should be fine.
-*/
+ */
 
 #include <usb.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/wait.h>
 #include <fcntl.h>
 #include <unistd.h>
+#include <signal.h>
+#include <time.h>
 
 #include <readline/readline.h>
 #include <readline/history.h>
 
+#include "png.h"
+
 
 //This routine locates a scope by VID/PID and returns an opened handle to it.
 usb_dev_handle *find_scope() {
-    struct usb_bus *bus;
-    struct usb_device *dev=NULL;
-    usb_find_busses();
-    usb_find_devices();
-    for (bus=usb_busses; bus; bus=bus->next) {
-	for (dev=bus->devices; dev; dev=dev->next) {
-//	    fprintf(stderr,"Prod/dev: %04X:%04X\n",dev->descriptor.idVendor,dev->descriptor.idProduct);
-	    if (dev->descriptor.idVendor==0x400 && dev->descriptor.idProduct==0x5dc) {
-		return usb_open(dev);
-	    }
+	struct usb_bus *bus;
+	struct usb_device *dev=NULL;
+	usb_find_busses();
+	usb_find_devices();
+	for (bus=usb_busses; bus; bus=bus->next) {
+		for (dev=bus->devices; dev; dev=dev->next) {
+			//fprintf(stderr,"Prod/dev: %04X:%04X\n",dev->descriptor.idVendor,dev->descriptor.idProduct);
+			if (dev->descriptor.idVendor==0x400 && dev->descriptor.idProduct==0x5dc) {
+				return usb_open(dev);
+			}
+		}
 	}
-    }
-    return NULL;
+	return NULL;
 }
 
 //Helper-routine: Convert a little-endian 4-byte word to an int
 void int2chars(unsigned char *buff,unsigned int a) {
-    buff[3]=(a>>24)&0xff;
-    buff[2]=(a>>16)&0xff;
-    buff[1]=(a>>8)&0xff;
-    buff[0]=(a)&0xff;
+	buff[3]=(a>>24)&0xff;
+	buff[2]=(a>>16)&0xff;
+	buff[1]=(a>>8)&0xff;
+	buff[0]=(a)&0xff;
 }
 
 //Helper-routine: Convert an int to  little-endian 4-byte word
 unsigned int chars2int(unsigned char *buff) {
-    unsigned int a;
-    a=buff[3]<<24;
-    a+=buff[2]<<16;
-    a+=buff[1]<<8;
-    a+=buff[0];
-    return a;
+	unsigned int a;
+	a=buff[3]<<24;
+	a+=buff[2]<<16;
+	a+=buff[1]<<8;
+	a+=buff[0];
+	return a;
 }
 
 #define MIN(a,b) (((a)<(b))?(a):(b))
 
 inline char printable (char ch)
 {
-  if (ch < ' ') return '.';
-  if (ch > '~') return '.';
-  return ch;
+	if (ch < ' ') return '.';
+	if (ch > '~') return '.';
+	return ch;
 }
 
 //Debugging: Print a buffers contents in hex
 void printb (unsigned char *pkt, int len)
 {
-  int i, j;
-
-  for (i=0;i<len;i+= 16) {
-    printf ("%04x:  ", i);
-    for (j=0;j < MIN(len-i, 16);j++) {
-      printf (" %02x", pkt[i+j]);
-      if (j == 7) printf ("  ");
-    }
-    if (j < 7) printf ("  ");
-    for (;j<17;j++)
-      printf ("   ");
-
-    for (j=0;j < MIN(len-i, 16);j++) {
-      printf ("%c", printable (pkt[i+j]));
-    }
-    printf ("\n");
-  }
+	int i, j;
+
+	for (i=0;i<len;i+= 16) {
+		printf ("%04x:  ", i);
+		for (j=0;j < MIN(len-i, 16);j++) {
+			printf (" %02x", pkt[i+j]);
+			if (j == 7) printf ("  ");
+		}
+		if (j < 7) printf ("  ");
+		for (;j<17;j++)
+			printf ("   ");
+
+		for (j=0;j < MIN(len-i, 16);j++) {
+			printf ("%c", printable (pkt[i+j]));
+		}
+		printf ("\n");
+	}
 }
 
 //Send a scpi-command to the scope. The response goes into the buffer
 //called resp, with a size of resplen. If resp==NULL, no response
 //is requested.
 int sendscpi(usb_dev_handle *dev, char* cmd, 
-             unsigned char *resp, int resplen) {
-    unsigned char *buff;
-    int len,r,i;
-    int cmdlen = strlen(cmd);
-    static unsigned char seq=0;
-
-
-    buff=malloc(0x40);
-    seq++;
-    buff[0]=1; //func
-    buff[1]=seq; buff[2]=~seq; //nseq
-    buff[3]=0;
-    int2chars(buff+4, cmdlen);
-    buff[8]=1;
-    buff[9]=0x37;
-    buff[10]=0x39;
-    buff[11]=0x39;
-    //    fprintf(stderr,"Writing header len=%d\n", cmdlen);
-//    printb(buff,12);
-    r=usb_bulk_write(dev, 1, (char*)buff, 12, 1000);
-//    fprintf(stderr,"%i bytes written. Writing cmd\n",r);
-//    printb(cmd, cmdlen);
-    r=usb_bulk_write(dev, 1, cmd, cmdlen, 1000);
-//    fprintf(stderr,"%i bytes written.\n",r);
-    if (resp != NULL && resplen != 0) {
-	//send read command
-	buff[0]=2; //func
+		unsigned char *resp, int resplen) {
+	unsigned char *buff;
+	int len,r,i;
+	int cmdlen = strlen(cmd);
+	static unsigned char seq=0;
+
+
+	buff=malloc(0x40);
 	seq++;
+	buff[0]=1; //func
 	buff[1]=seq; buff[2]=~seq; //nseq
-	int2chars(buff+4,0x40);
+	buff[3]=0;
+	int2chars(buff+4, cmdlen);
 	buff[8]=1;
-	buff[9]=0xA;
-	buff[10]=0;
-	buff[11]=0;
-//	fprintf(stderr,"Writing resp req header\n");
-//	printb(buff,12);
+	buff[9]=0x37;
+	buff[10]=0x39;
+	buff[11]=0x39;
+	//fprintf(stderr,"Writing header len=%d\n", cmdlen);
+	//printb(buff,12);
 	r=usb_bulk_write(dev, 1, (char*)buff, 12, 1000);
-//	fprintf(stderr,"%i bytes written. Reading response hdr\n",r);
-	r=usb_bulk_read(dev, 2, (char*)buff, 0x40, 1000);
-//	printb(buff,r);
-	len=chars2int(buff+4);
-	//	fprintf(stderr,"%i bytes read. Resplen=%i\n",r,len);
-	for (i=0; i<(r-12); i++) {
-	    if (i<resplen) resp[i] = buff[i+12];
-	}
-//	printb(resp,r-12);
-	if (len > 0x40-12) {
-//	    fprintf(stderr," Reading response:\n");
-	    if (resplen<len) len=resplen;
-	    r=usb_bulk_read(dev, 2, (char*)resp+(0x40-12), len-(0x40-12),1000);
-	    //	    fprintf(stderr,"%i bytes read, wanted %i.\n", r, len-(0x40-12));
-	    return r+(0x40-12);
+	//fprintf(stderr,"%i bytes written. Writing cmd\n",r);
+	//printb(cmd, cmdlen);
+	r=usb_bulk_write(dev, 1, cmd, cmdlen, 1000);
+	//fprintf(stderr,"%i bytes written.\n",r);
+	if (resp != NULL && resplen != 0) {
+		//send read command
+		buff[0]=2; //func
+		seq++;
+		buff[1]=seq; buff[2]=~seq; //nseq
+		int2chars(buff+4,0x40);
+		buff[8]=1;
+		buff[9]=0xA;
+		buff[10]=0;
+		buff[11]=0;
+		//fprintf(stderr,"Writing resp req header\n");
+		//printb(buff,12);
+		r=usb_bulk_write(dev, 1, (char*)buff, 12, 1000);
+		//fprintf(stderr,"%i bytes written. Reading response hdr\n",r);
+		r=usb_bulk_read(dev, 2, (char*)buff, 0x40, 1000);
+		//printb(buff,r);
+		len=chars2int(buff+4);
+		//fprintf(stderr,"%i bytes read. Resplen=%i\n",r,len);
+		for (i=0; i<(r-12); i++) {
+			if (i<resplen) resp[i] = buff[i+12];
+		}
+		//printb(resp,r-12);
+		if (len > 0x40-12) {
+			//fprintf(stderr," Reading response:\n");
+			if (resplen<len) len=resplen;
+			r=usb_bulk_read(dev, 2, (char*)resp+(0x40-12), len-(0x40-12),1000);
+			//fprintf(stderr,"%i bytes read, wanted %i.\n", r, len-(0x40-12));
+			return r+(0x40-12);
+		}
+		return len;
 	}
-	return len;
-    }
-    return 0;
+	return 0;
 }
 
 //Initialize the scope.
 void initscope(usb_dev_handle *dev) {
-    int r;
-    unsigned char buff[10];
-    usb_claim_interface(dev,0);
-    //The following code isn't really necessary, the program works
-    //OK without it too.
-    r=usb_control_msg(dev, 0xC8, 9, 0, 0, (char*)buff, 4, 1000);
-    if (r < 0) {
-        fprintf (stderr, "Error %d sending init message: %s\n", 
-		r, strerror (-r));
-        fprintf (stderr, "Do you have permission on the USB device?\n");
-	exit (1);
-    }
-    if (chars2int(buff)!=0x40004dc) {
-	fprintf(stderr,"Init: buff[%i]=%x\n",r,chars2int(buff));
-    }
-    return;
+	int r;
+	unsigned char buff[10];
+	usb_claim_interface(dev,0);
+	//The following code isn't really necessary, the program works
+	//OK without it too.
+	r=usb_control_msg(dev, 0xC8, 9, 0, 0, (char*)buff, 4, 1000);
+	if (r < 0) {
+		fprintf (stderr, "Error %d sending init message: %s\n", 
+				r, strerror (-r));
+		fprintf (stderr, "Do you have permission on the USB device?\n");
+		exit (1);
+	}
+	if (chars2int(buff)!=0x40004dc) {
+		fprintf(stderr,"Init: buff[%i]=%x\n",r,chars2int(buff));
+	}
+	return;
 }
 
 #define HAVE_READLINE
@@ -173,21 +179,21 @@ void initscope(usb_dev_handle *dev) {
 
 char *readline (prompt)
 {
-  char *buf;
-
-  printf (prompt); 
-  fflush (stdout); 
-  buf = malloc (1024); 
-  
-  if (fgets (buf, 1023, stdin) == NULL) {
-    free (buf); 
-    return NULL; 
-  }
-  l = strlen (buf); 
-  if (buf[l-1] == '\n') {
-    buf[l] = 0;
-  }
-  return buf; 
+	char *buf;
+
+	printf (prompt); 
+	fflush (stdout); 
+	buf = malloc (1024); 
+
+	if (fgets (buf, 1023, stdin) == NULL) {
+		free (buf); 
+		return NULL; 
+	}
+	l = strlen (buf); 
+	if (buf[l-1] == '\n') {
+		buf[l] = 0;
+	}
+	return buf; 
 }
 
 void add_history (char *buf)
@@ -198,36 +204,36 @@ void add_history (char *buf)
 
 void do_plot (struct usb_dev_handle *sc)
 {
-  unsigned char ch1[1024], ch2[1024];
-  int i, l;
+	unsigned char ch1[1024], ch2[1024];
+	int i, l;
 
-  static FILE *gnuplot=NULL;
-  FILE *fp;
+	static FILE *gnuplot=NULL;
+	FILE *fp;
 
-  l = sendscpi(sc, ":WAV:DATA? CHANEL1", ch1, 1024);
+	l = sendscpi(sc, ":WAV:DATA? CHANEL1", ch1, 1024);
 
-  if (l != 1024) {
-    printf ("hmm. didnt' get 1024 bytes. \n"); 
-  }
+	if (l != 1024) {
+		printf ("hmm. didnt' get 1024 bytes. \n"); 
+	}
 
-  l = sendscpi(sc, ":WAV:DATA? CHANNEL2", ch2, 1024);
+	l = sendscpi(sc, ":WAV:DATA? CHANNEL2", ch2, 1024);
 
-  if (l != 1024) {
-    printf ("hmm. didnt' get 1024 bytes. \n"); 
-  }
+	if (l != 1024) {
+		printf ("hmm. didnt' get 1024 bytes. \n"); 
+	}
 
-  if (!gnuplot) {
-    gnuplot = popen ("gnuplot", "w"); 
-  }
+	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); 
+	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);
+	fprintf (gnuplot, "plot 'temp.dat' using 1 with lines, 'temp.dat' using 2 with lines\n");
+	fflush (gnuplot);
 }
 
 
@@ -235,126 +241,212 @@ void do_plot (struct usb_dev_handle *sc)
 
 double get_float_from_scope (struct usb_dev_handle *sc, char *var)
 {
-  unsigned char buf[1024];
-  double temp;
-  int l;
-
-  l = sendscpi(sc, var, buf, 1024);
-  if (l > 0) {
-    sscanf ((char*)buf, "%lf", &temp); 
-    return temp;
-  }
-  return ERROR;
+	unsigned char buf[1024];
+	double temp;
+	int l;
+
+	l = 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;
+	FILE *fp;
+	int i, j, l, bp;
+	char buf[1024];
+	unsigned char ch1[1024];
+	unsigned char data[512*1024];
+	double sampfreq;
+
+	sendscpi (sc, ":STOP", NULL, 0); 
+
+	sampfreq = get_float_from_scope (sc, ":ACQ:SAMP?");
+
+	printf ("Got sampling freq: %g\n", sampfreq);  
 
-  sendscpi (sc, ":STOP", NULL, 0); 
+	sprintf (buf, ":TIM:SCAL %.15f", 50 / sampfreq);
+	printf ("sending scale cmd: %s\n", buf); 
+	sendscpi (sc, buf, NULL, 0);
 
-  sampfreq = get_float_from_scope (sc, ":ACQ:SAMP?");
+	sleep (1);
 
-  printf ("Got sampling freq: %g\n", sampfreq);  
+	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); 
+		sendscpi (sc, buf, NULL, 0);
 
-  sprintf (buf, ":TIM:SCAL %.15f", 50 / sampfreq);
-  printf ("sending scale cmd: %s\n", buf); 
-  sendscpi (sc, buf, NULL, 0);
+		l = sendscpi(sc, ":WAV:DATA? CHANEL1", ch1, 1024);
 
-  sleep (1);
+		if (l != 1024) {
+			printf ("hmm. didnt' get 1024 bytes. \n"); 
+		}
 
-  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); 
-    sendscpi (sc, buf, NULL, 0);
+		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); 
 
-    l = sendscpi(sc, ":WAV:DATA? CHANEL1", ch1, 1024);
+	sendscpi (sc, ":TIM:OFFSET 0", NULL, 0);
+}
 
-    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);
+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 = sendscpi(sc, ":KEY:LOCK DISABLE", NULL, 0); 
+	usleep(20000);
+
+	l = sendscpi(sc, ":LCD:DATA?", screen, sizeof(screen));
+
+	if (l != sizeof(screen)) {
+		printf ("hmm. didnt' get %d bytes, but %d\n\n", sizeof(screen), l); 
+	}
 
-  fp = fopen ("ch1.dump", "w");
-  fwrite (data, bp, 1, fp);
-  fclose (fp); 
+	png = lcd2png(screen, &imglen);
 
-  sendscpi (sc, ":TIM:OFFSET 0", NULL, 0);
+	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;
+	}
 }
 
+void child_reaper(int sig)
+{
+	pid_t child;
 
+	do {
+		child = waitpid(-1, NULL, WNOHANG);
+	} while(child > 0);
+	
+}
 
 int main(int argc, char **argv) 
 {
-  struct usb_dev_handle *sc;
-  char *scpi;
-  unsigned char *buff;
-  int l;
-  //Init libusb
-  usb_init();
-  //Locate and open the scope
-  sc=find_scope();
-  if (!sc) {
-    printf("No scope found.\n");
-    exit(1);
-  } else {
-    printf("Scope found.\n");
-  }
-  //Initialize scope
-  initscope(sc);
-  buff = malloc (1024*1024); 
-  while (1) {
-    scpi = readline ("> ");
-
-    if (!scpi) break;
-    if (strlen (scpi) == 0) {
-      free (scpi); 
-      continue;
-    }
-    
-    add_history (scpi); 
-
-    if (strncmp (scpi, "quit", 4) == 0) break;
-    if (strncmp (scpi, "plot", 4) == 0) {
-      do_plot (sc);
-      continue;
-    }
-    if (strncmp (scpi, "databuf", 4) == 0) {
-      do_get_buf (sc);
-      continue;
-    }
-
-    l = strlen (scpi); 
-    //       printf ("got buf(%d): ", l); 
-    //       printb (scpi, l+2); 
-    if (strchr (scpi, '?')) {
-      //	printf ("Expecting reply\n");
-      l = sendscpi(sc, scpi, buff, 1024*1024);
-      //          printf ("Got replylen = %d.\n", l); 
-      buff[l] = 0; //zero-terminate
-      printb (buff, l);
-    } else {
-      //	printf ("No reply expected\n");
-      l=sendscpi(sc,scpi,NULL,0);
-    }
-    free (scpi);
-  }
-  //Disable keylock, so the user doesn't have to press the 'force'-button
-  l=sendscpi(sc, ":KEY:LOCK DISABLE",NULL,0); 
-  
-  //Free up and exit
-  usb_release_interface(sc,0);
-  usb_close(sc);
-  return 0;
+	struct usb_dev_handle *sc;
+	char *scpi;
+	unsigned char *buff;
+	int l;
+	struct sigaction act;
+
+	//Init libusb
+	usb_init();
+	//Locate and open the scope
+	sc=find_scope();
+	if (!sc) {
+		printf("No scope found.\n");
+		exit(1);
+	} else {
+		printf("Scope found.\n");
+	}
+	//Initialize scope
+	initscope(sc);
+	buff = malloc (1024*1024); 
+	if (buff == NULL) {
+		perror("malloc");
+		exit(EXIT_FAILURE);
+	}
+
+	bzero(&act, sizeof(act));
+	act.sa_handler = child_reaper;
+	act.sa_flags = SA_NOCLDSTOP|SA_RESTART;
+	if (sigaction(SIGCHLD, &act, NULL) == -1) {
+		perror("sigaction");
+		exit(EXIT_FAILURE);
+	}
+
+	while (1) {
+		scpi = readline ("> ");
+
+		if (!scpi) break;
+		if (strlen (scpi) == 0) {
+			free (scpi); 
+			continue;
+		}
+
+		add_history (scpi); 
+
+		if (strncmp (scpi, "quit", 4) == 0) break;
+		if (strncmp (scpi, "plot", 4) == 0) {
+			do_plot (sc);
+			continue;
+		}
+		if (strncmp (scpi, "databuf", 7) == 0) {
+			do_get_buf (sc);
+			continue;
+		}
+		if (strncmp (scpi, "screen", 6) == 0) {
+			do_get_screen (sc);
+			continue;
+		}
+
+		l = strlen (scpi); 
+		//printf ("got buf(%d): ", l); 
+		//printb (scpi, l+2); 
+		if (strchr (scpi, '?')) {
+			//printf ("Expecting reply\n");
+			l = sendscpi(sc, scpi, buff, 1024*1024);
+			//printf ("Got replylen = %d.\n", l); 
+			buff[l] = 0; //zero-terminate
+			printb (buff, l);
+		} else {
+			//printf ("No reply expected\n");
+			l=sendscpi(sc,scpi,NULL,0);
+		}
+		free (scpi);
+	}
+	//Disable keylock, so the user doesn't have to press the 'force'-button
+	l=sendscpi(sc, ":KEY:LOCK DISABLE",NULL,0); 
+
+	//Free up and exit
+	usb_release_interface(sc,0);
+	usb_close(sc);
+	return 0;
 }