(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>
-
-//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);
- }
- }
- }
- 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;
-}
-
-//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;
-}
+#include "scope.h"
+#include "commands.h"
#define MIN(a,b) (((a)<(b))?(a):(b))
}
}
-//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
- 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 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;
-}
-
#define HAVE_READLINE
#ifndef HAVE_READLINE
}
#endif
-
-void do_plot (struct usb_dev_handle *sc)
-{
- unsigned char ch1[1024], ch2[1024];
- int i, l;
-
- static FILE *gnuplot=NULL;
- FILE *fp;
-
- l = sendscpi(sc, ":WAV:DATA? CHANEL1", ch1, 1024);
-
- if (l != 1024) {
- printf ("hmm. didnt' get 1024 bytes. \n");
- }
-
- l = 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
-
-double get_float_from_scope (struct usb_dev_handle *sc, char *var)
+void child_reaper(int sig)
{
- unsigned char buf[1024];
- double temp;
- int l;
+ pid_t child;
- l = sendscpi(sc, var, buf, 1024);
- if (l > 0) {
- sscanf ((char*)buf, "%lf", &temp);
- return temp;
- }
- return ERROR;
+ do {
+ child = waitpid(-1, NULL, WNOHANG);
+ } while(child > 0);
+
}
-
-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;
-
- 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);
- 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);
- sendscpi (sc, buf, NULL, 0);
-
- l = 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);
-
- sendscpi (sc, ":TIM:OFFSET 0", NULL, 0);
-}
-
-
-
int main(int argc, char **argv)
{
- struct usb_dev_handle *sc;
+ struct scope *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");
- }
+ struct sigaction act;
+
//Initialize scope
- initscope(sc);
+ sc = initscope();
+ claimscope(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 ("> ");
do_plot (sc);
continue;
}
- if (strncmp (scpi, "databuf", 4) == 0) {
- do_get_buf (sc);
+ if (strncmp (scpi, "databuf", 7) == 0) {
+ do_get_buf(sc);
+ continue;
+ }
+ if (strncmp (scpi, "screen", 6) == 0) {
+ do_get_screen(sc);
+ continue;
+ }
+ if (strncmp (scpi, "display", 7) == 0) {
+ do_display_screen(sc);
continue;
}
}
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);
+ releasescope(sc);
+ closescope(sc);
return 0;
}
projects / rigol / blobdiff