--- a/pce.c	Sun Oct 24 13:06:54 2010 +0200
+++ b/pce.c	Sun Oct 24 19:24:00 2010 +0200
@@ -204,37 +204,43 @@
 
         parse_data(data);
 
-        char frame[3];
-        frame[0] = 0;
-        frame[1] = 0;
-        frame[2] = num_frames;
+        int sec = 0;
+        do
+        {
+            char frame[3];
+            int step_frames = num_frames >= 0x40 ? 0x40 : num_frames;
+            frame[0] = 0;
+            frame[1] = 0;
+            frame[2] = step_frames;
 
-        res = usb_bulk_write(handle, ep_out, frame, 3, 1000);
-        assert(res == 3);
+            res = usb_bulk_write(handle, ep_out, frame, 3, 1000);
+            assert(res == 3);
 
-        res = usb_bulk_read(handle, ep_in, data, 3, 1000);
-        assert(res == 3);
-        fprintf(stderr, "Debug: %02hhx%02hhx%02hhx\n", data[0], data[1], data[2]);
-        assert(data[0] == 2);
+            res = usb_bulk_read(handle, ep_in, data, 3, 1000);
+            assert(res == 3);
+            fprintf(stderr, "Debug: %02hhx%02hhx%02hhx\n", data[0], data[1], data[2]);
+            assert(data[0] == 2);
 
-        int i;
-        int sec = 0;
-        for(i=0; i < num_frames; ++i)
-        {
-            res = usb_bulk_read(handle, ep_in, data, 64, 1000);
-            assert(res == 64);
-            int take = (num >= 64) ? 64 : num;
+            int i;
+            for(i=0; i < step_frames; ++i)
+            {
+                res = usb_bulk_read(handle, ep_in, data, 64, 5000);
+                assert(res == 64);
+                int take = (num >= 64) ? 64 : num;
 
-            int j;
-            for(j=0; j<take; j+=4)
-            {
-                float temp = *((short int *) (data + j)) / 10.;
-                float hum = *((short int *) (data + j + 2)) / 10.;
-                fprintf(outfile, "%i %g %g\n", sec, temp, hum);
-                sec++;
+                int j;
+                for(j=0; j<take; j+=4)
+                {
+                    float temp = *((short int *) (data + j)) / 10.;
+                    float hum = *((short int *) (data + j + 2)) / 10.;
+                    fprintf(outfile, "%i %g %g\n", sec, temp, hum);
+                    sec++;
+                }
+                num -= 64;
+                num_frames -= 1;
             }
-            num -= 64;
         }
+        while(num_frames > 0);
     }
 }