X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/hmcfgusb/blobdiff_plain/4371275b6337ea3ae513f1c19463f8b4745d89d8..53d7bde277d9bc02e80195c4cbe44a97f21facd5:/hmsniff.c

diff --git a/hmsniff.c b/hmsniff.c
index e842453..39133d3 100644
--- a/hmsniff.c
+++ b/hmsniff.c
@@ -32,6 +32,7 @@
 #include <sys/time.h>
 #include <libusb-1.0/libusb.h>
 
+#include "version.h"
 #include "hexdump.h"
 #include "hmcfgusb.h"
 
@@ -188,6 +189,7 @@ int main(int argc, char **argv)
 		}
 		printf("HM-CFG-USB opened!\n");
 
+		hmcfgusb_send_null_frame(dev, 1);
 		hmcfgusb_send(dev, (unsigned char*)"K", 1, 1);
 
 		while(!quit) {
@@ -199,14 +201,19 @@ int main(int argc, char **argv)
 				rdata.wrong_hmid = 0;
 				hmcfgusb_send(dev, (unsigned char*)"K", 1, 1);
 			}
-			fd = hmcfgusb_poll(dev, 10);
+			fd = hmcfgusb_poll(dev, 1);
 			if (fd >= 0) {
 				fprintf(stderr, "activity on unknown fd %d!\n", fd);
 				continue;
 			} else if (fd == -1) {
 				if (errno) {
-					perror("hmcfgusb_poll");
-					break;
+					if (errno != ETIMEDOUT) {
+						perror("hmcfgusb_poll");
+						break;
+					} else {
+						/* periodically wakeup the device */
+						hmcfgusb_send_null_frame(dev, 1);
+					}
 				}
 			}
 		}