From: Uwe Bonnes <bon@elektron.ikp.physik.tu-darmstadt.de>
Date: Thu, 20 Jan 2011 15:51:21 +0000 (+0100)
Subject: Safer initialisation of ftdi_readstream
X-Git-Tag: v1.0rc1~140
X-Git-Url: http://developer.intra2net.com/git/?p=libftdi;a=commitdiff_plain;h=a3886df38983951eb4b0abffd17aaf1a9018d42b

Safer initialisation of ftdi_readstream

Applies to both branches

--
Uwe Bonnes                bon@elektron.ikp.physik.tu-darmstadt.de
---

diff --git a/src/ftdi_stream.c b/src/ftdi_stream.c
index 6c40327..6b5b61c 100644
--- a/src/ftdi_stream.c
+++ b/src/ftdi_stream.c
@@ -153,6 +153,20 @@ ftdi_readstream(struct ftdi_context *ftdi,
     int xferIndex;
     int err = 0;
     
+    /* We don't know in what state we are, switch to reset*/
+    if (ftdi_set_bitmode(ftdi,  0xff, BITMODE_RESET) < 0)
+    {
+        fprintf(stderr,"Can't reset mode\n");
+        return 1;
+    }
+    
+    /* Purge anything remaining in the buffers*/
+    if (ftdi_usb_purge_buffers(ftdi) < 0)
+    {
+        fprintf(stderr,"Can't Purge\n");
+        return 1;
+    }
+
     /*
      * Set up all transfers
      */