On Apr 15, 2009, at 14:13 PM, Bodo Alaze wrote:
The returncode from ftdi_usb_open() is "-8: get product description
failed"
Hm, looking at the source code, ftdi_usb_open() should never return
this error:
Are you using the latest version of libftdi from git?
int ftdi_usb_open(struct ftdi_context *ftdi, int vendor, int product)
{
return ftdi_usb_open_desc(ftdi, vendor, product, NULL, NULL);
}
int ftdi_usb_open_desc(struct ftdi_context *ftdi, int vendor, int
product,
const char* description, const char* serial)
{
[...]
if (description != NULL)
{
if (usb_get_string_simple(ftdi->usb_dev, dev-
>descriptor.iProduct, string, sizeof(string)) <= 0)
{
usb_close (ftdi->usb_dev);
ftdi_error_return(-8, "unable to fetch
product description");
}
[...]
Try tracing through the source in a debugger and see what really
happens.
It might be that libftdi or libusb gets confused by a "corrupt"
eeprom, and you may have to slightly patch libftdi or ftdi-eeprom to
ignore one or more "harmless" errors to force it to open the device.
~/= Marius
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