Hello,
I had sent this patch again at the end of last year. It is needed to open
multiple devices from a single process. The problem is that when in the list of
devices a device at the start of the list has already been opened, the reading
of device parameters for the already opened device fails. Currently the list is
then not traversed any further and open returns with an error. The patch
changes that so the list of devices is searched for the device to open until
the list end.
Please apply or comment.
Rolf
>From 96efe597d9848609a6e8528450bd5317702cc752 Mon Sep 17 00:00:00 2001
From: Rolf Fiedler <derRolf@xxxxxxxxxxxxxx>
Date: Tue, 15 Jan 2013 11:17:36 +0100
Subject: [PATCH] add support to find and open multiple devices from same
process
---
src/ftdi.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/src/ftdi.c b/src/ftdi.c
index 92190a0..af7a573 100644
--- a/src/ftdi.c
+++ b/src/ftdi.c
@@ -717,8 +717,9 @@ int ftdi_usb_open_desc_index(struct ftdi_context *ftdi, int
vendor, int product,
{
if (libusb_get_string_descriptor_ascii(ftdi->usb_dev,
desc.iProduct, (unsigned char *)string
{
- ftdi_usb_close_internal (ftdi);
- ftdi_error_return_free_device_list(-8, "unable to fetch
product description", devs);
+ ftdi_usb_close_internal (ftdi);
+ continue; // try next device, this may already have been
opened
+ //ftdi_error_return_free_device_list(-8, "unable to fetch
product description", devs);
}
if (strncmp(string, description, sizeof(string)) != 0)
{
@@ -731,7 +732,8 @@ int ftdi_usb_open_desc_index(struct ftdi_context *ftdi, int
vendor, int product,
if (libusb_get_string_descriptor_ascii(ftdi->usb_dev,
desc.iSerialNumber, (unsigned char *)s
{
ftdi_usb_close_internal (ftdi);
- ftdi_error_return_free_device_list(-9, "unable to fetch
serial number", devs);
+ continue; // try next device, this may already have been
opened
+ //ftdi_error_return_free_device_list(-9, "unable to fetch
serial number", devs);
}
if (strncmp(string, serial, sizeof(string)) != 0)
{
--
1.7.10.2 (Apple Git-33)
--
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