-//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;
-}
-