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"
-unsigned char seq=0;
//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, unsigned char* cmd,
- unsigned char *resp, int resplen) {
- char *buff;
- int len,r,i;
- buff=malloc(0x40);
- seq++;
- buff[0]=1; //func
- buff[1]=seq; buff[2]=~seq; //nseq
- buff[3]=0;
- int2chars(buff+4,strlen(cmd));
- buff[8]=1;
- buff[9]=0x37;
- buff[10]=0x39;
- buff[11]=0x39;
- // fprintf(stderr,"Writing header len=%d\n", strlen (cmd));
-// printb(buff,12);
- r=usb_bulk_write(dev,1,buff,12,1000);
-// fprintf(stderr,"%i bytes written. Writing cmd\n",r);
-// printb(cmd,strlen(cmd));
- r=usb_bulk_write(dev,1,cmd,strlen(cmd),1000);
-// fprintf(stderr,"%i bytes written.\n",r);
- if (resp != NULL && resplen != 0) {
- //send read command
- buff[0]=2; //func
+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
- 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);
- r=usb_bulk_write(dev,1,buff,12,1000);
-// fprintf(stderr,"%i bytes written. Reading response hdr\n",r);
- r=usb_bulk_read(dev,2,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,resp+(0x40-12),len-(0x40-12),1000);
- // fprintf(stderr,"%i bytes read, wanted %i.\n", r, len-(0x40-12));
- return r+(0x40-12);
+ 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. 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;
- 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, 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
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)
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);
}
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 (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;
- unsigned char buf[1024], 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);
+ sendscpi (sc, ":STOP", NULL, 0);
- sampfreq = get_float_from_scope (sc, ":ACQ:SAMP?");
+ sampfreq = get_float_from_scope (sc, ":ACQ:SAMP?");
- printf ("Got sampling freq: %g\n", sampfreq);
+ 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);
+ sprintf (buf, ":TIM:SCAL %.15f", 50 / sampfreq);
+ printf ("sending scale cmd: %s\n", buf);
+ sendscpi (sc, buf, NULL, 0);
- sleep (1);
+ 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);
+ 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);
+ 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);
+ 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);
+ fp = fopen ("ch1.dump", "w");
+ fwrite (data, bp, 1, fp);
+ fclose (fp);
- sendscpi (sc, ":TIM:OFFSET 0", NULL, 0);
+ 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 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);
+ }
+
+ strftime(filename, sizeof(filename), "screen_%Y%m%d-%H%M%S.png", localtime(<));
+ fd=open(filename, O_CREAT|O_WRONLY, 0644);
+ png = lcd2png(screen, &imglen);
+ write(fd, png, imglen);
+ close(fd);
+
+ 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, *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;
}
projects / rigol / blobdiff