use uint32_t for vid/pid request

diff --git a/usbtmc.c b/usbtmc.c
index 419d100069b25111e57c7ab9b94abea9d81fe11f..6af5a13dc2c7a64d45e2404afd9ec18135b80551 100644 (file)
--- a/usbtmc.c
+++ b/usbtmc.c
@@ -215,7 +215,7 @@ void usbtmc_release(struct scope *sc)
 //Initialize the scope.
 struct scope* usbtmc_initscope(void) {
        int r;
-       unsigned char buff[10];
+       uint32_t vidpid;
        struct scope *sc;
 
        /* Init libusb */
@@ -229,7 +229,7 @@ struct scope* usbtmc_initscope(void) {
        usbtmc_claim(sc);
        /* The following code isn't really necessary, the program works
           OK without it too. */
-       r=usb_control_msg(sc->usb.dev, 0xC8, 9, 0, 0, (char*)buff, 4, USB_TIMEOUT);
+       r=usb_control_msg(sc->usb.dev, 0xC8, 9, 0, 0, (char*)&vidpid, 4, USB_TIMEOUT);
        usbtmc_release(sc);
        if (r < 0) {
                fprintf (stderr, "Error %d sending init message: %s\n", 
@@ -237,8 +237,8 @@ struct scope* usbtmc_initscope(void) {
                fprintf (stderr, "Do you have permission on the USB device?\n");
                exit (1);
        }
-       if (LE32((*(uint32_t*)buff))!=0x40005dc) {
-               fprintf(stderr,"Init: buff[%i]=%x\n",r,LE32((*(uint32_t*)buff)));
+       if (LE32(vidpid)!=0x40005dc) {
+               fprintf(stderr,"Init: buff[%i]=%x\n",r,LE32(vidpid));
        }
        return sc;
 }