perform device reset and RX purge

git-svn-id: https://urjtag.svn.sourceforge.net/svnroot/urjtag/trunk@1301 b68d4a1b-bc3d-0410-92ed-d4ac073336b7

jtag/ChangeLog

@@ -1,3 +1,8 @@
+2008-07-10  Arnim Laeuger  <arniml@users.sourceforge.net>
+
+   * src/tap/usbconn/libftd2xx.c (usbconn_ftd2xx_open): perform device reset
+     and RX purge
+
 2008-07-09  Arnim Laeuger  <arniml@users.sourceforge.net>
 
    * src/tap/usbconn/libftd2xx.c: added some debugging messages

jtag/src/tap/usbconn/libftd2xx.c

@@ -330,7 +330,7 @@ usbconn_ftd2xx_common_open( usbconn_t *conn )
 
   if ((status = FT_Open( 0, &(p->fc) )) != FT_OK)
   {
-    perror( "Unable to open FTDO device.\n" );
+    perror( "Unable to open FTDI device.\n" );
     /* mark ftd2xx layer as not initialized */
     p->fc = NULL;
     return -1;
@@ -353,7 +353,12 @@ usbconn_ftd2xx_open( usbconn_t *conn )
 
   fc = p->fc;
 
-  if ((status =  FT_SetBitMode( fc, 0x00, 0x00 )) != FT_OK)
+  if ((status = FT_ResetDevice( fc )) != FT_OK)
+    perror( _("Can't reset device.\n") );
+  if (status == FT_OK) if ((status =  FT_Purge( fc, FT_PURGE_RX )) != FT_OK)
+    perror( _("Can't purge RX buffer.\n") );
+
+  if (status == FT_OK) if ((status =  FT_SetBitMode( fc, 0x00, 0x00 )) != FT_OK)
     perror( _("Can't disable bitmode.\n") );
 
   if (status == FT_OK) if ((status = FT_SetLatencyTimer(fc, 2)) != FT_OK)