Thomas Jarosch wrote:
> Hello,
>
> I guess I've applied all outstanding patches to libftdi's git tree.
> Please ping me if I might have missed one/yours.
>
> Now we just need a fix for the
>
> "FT2232H bug: wrong maxpacket at full speed"
>
> issue ;)
Probably something like the below patch. Note, only lightly tested
(it returns 64 on my full-speed device here), and maybe it's something
that should instead be stored in ftdi_context every time the interface
changes.
-jim
diff --git a/src/ftdi.c b/src/ftdi.c
index d7f4bb0..26d08a4 100644
--- a/src/ftdi.c
+++ b/src/ftdi.c
@@ -1268,11 +1268,7 @@ int ftdi_read_data(struct ftdi_context *ftdi, unsigned
char *buf, int size)
int offset = 0, ret = 1, i, num_of_chunks, chunk_remains;
int packet_size;
- // New hi-speed devices from FTDI use a packet size of 512 bytes
- if (ftdi->type == TYPE_2232H || ftdi->type == TYPE_4232H)
- packet_size = 512;
- else
- packet_size = 64;
+ packet_size =
usb_device(ftdi->usb_dev)->config[0].interface[ftdi->interface].altsetting[0].endpoint[0].wMaxPacketSize;
// everything we want is still in the readbuffer?
if (size <= ftdi->readbuffer_remaining)
--
libftdi - see http://www.intra2net.com/en/developer/libftdi for details.
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