X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/rigol/blobdiff_plain/b74fea90bd5429ab527016eb89d98b4c6a246e68..b131d433f9b984b50266298be6f0cf7f9a13b6fb:/usbtmc.c

diff --git a/usbtmc.c b/usbtmc.c
index d652494..054e49c 100644
--- a/usbtmc.c
+++ b/usbtmc.c
@@ -103,6 +103,18 @@ int usbtmc_sendscpi(usb_dev_handle *dev, char* cmd,
 	return 0;
 }
 
+void usbtmc_claim(usb_dev_handle *sc)
+{
+	usb_claim_interface(sc, 0);
+}
+
+void usbtmc_release(usb_dev_handle *sc)
+{
+	//Disable keylock, so the user doesn't have to press the 'force'-button
+	usbtmc_sendscpi(sc, ":KEY:LOCK DISABLE",NULL,0); 
+	usb_release_interface(sc, 0);
+}
+
 //Initialize the scope.
 usb_dev_handle* usbtmc_initscope(void) {
 	int r;
@@ -119,10 +131,11 @@ usb_dev_handle* usbtmc_initscope(void) {
 	} else {
 		printf("Scope found.\n");
 	}
-	usb_claim_interface(dev,0);
+	usbtmc_claim(dev);
 	//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);
+	usbtmc_release(dev);
 	if (r < 0) {
 		fprintf (stderr, "Error %d sending init message: %s\n", 
 				r, strerror (-r));
@@ -138,6 +151,5 @@ usb_dev_handle* usbtmc_initscope(void) {
 void usbtmc_close(usb_dev_handle *sc)
 {
 	//Free up and exit
-	usb_release_interface(sc,0);
 	usb_close(sc);
 }