Davide Michelizza <dmichelizza@gmail.com>
Denis Sirotkin <reg.libftdi@demitel.ru>
Emil <emil@datel.co.uk>
+ Eugene Hutorny <eugene@hutorny.in.ua>
Evan Nemerson <evan@coeus-group.com>
Evgeny Sinelnikov <sin@geoft.ru>
Flynn Marquardt <ftdi@flynnux.de>
+New in 1.3 - 2016-04-xx
+-----------------------
+* Added ftdi_transfer_data_cancel for cancelation of a submitted transfer,
+ avoided resubmittion of a cancelled transfer in the callbacks, replaced calls
+ to libusb_handle_events with libusb_handle_events_timeout_completed
+ (Eugene Hutorny, eugene@hutorny.in.ua)
+
+Note: All other changes are not listed yet
+
New in 1.2 - 2014-11-21
-----------------------
* Support for FT230X devices (Uwe Bonnes)
}
}
}
- ret = libusb_submit_transfer (transfer);
- if (ret < 0)
- tc->completed = 1;
+
+ if (transfer->status == LIBUSB_TRANSFER_CANCELLED)
+ tc->completed = LIBUSB_TRANSFER_CANCELLED;
+ else
+ {
+ ret = libusb_submit_transfer (transfer);
+ if (ret < 0)
+ tc->completed = 1;
+ }
}
transfer->length = write_size;
transfer->buffer = tc->buf + tc->offset;
- ret = libusb_submit_transfer (transfer);
- if (ret < 0)
- tc->completed = 1;
+
+ if (transfer->status == LIBUSB_TRANSFER_CANCELLED)
+ tc->completed = LIBUSB_TRANSFER_CANCELLED;
+ else
+ {
+ ret = libusb_submit_transfer (transfer);
+ if (ret < 0)
+ tc->completed = 1;
+ }
}
}
int ftdi_transfer_data_done(struct ftdi_transfer_control *tc)
{
int ret;
-
+ struct timeval to = { 0, 0 };
while (!tc->completed)
{
- ret = libusb_handle_events(tc->ftdi->usb_ctx);
+ ret = libusb_handle_events_timeout_completed(tc->ftdi->usb_ctx,
+ &to, &tc->completed);
if (ret < 0)
{
if (ret == LIBUSB_ERROR_INTERRUPTED)
continue;
libusb_cancel_transfer(tc->transfer);
while (!tc->completed)
- if (libusb_handle_events(tc->ftdi->usb_ctx) < 0)
+ if (libusb_handle_events_timeout_completed(tc->ftdi->usb_ctx,
+ &to, &tc->completed) < 0)
break;
libusb_free_transfer(tc->transfer);
free (tc);
}
/**
+ Cancel transfer and wait for completion.
+
+ Use libusb 1.0 asynchronous API.
+
+ \param tc pointer to ftdi_transfer_control
+ \param to pointer to timeout value or NULL for infinite
+*/
+
+void ftdi_transfer_data_cancel(struct ftdi_transfer_control *tc,
+ struct timeval * to)
+{
+ struct timeval tv = { 0, 0 };
+
+ if (!tc->completed && tc->transfer != NULL)
+ {
+ if (to == NULL)
+ to = &tv;
+
+ libusb_cancel_transfer(tc->transfer);
+ while (!tc->completed)
+ {
+ if (libusb_handle_events_timeout_completed(tc->ftdi->usb_ctx, to, &tc->completed) < 0)
+ break;
+ }
+ }
+
+ if (tc->transfer)
+ libusb_free_transfer(tc->transfer);
+
+ free (tc);
+}
+
+/**
Configure write buffer chunk size.
Default is 4096.
struct ftdi_transfer_control *ftdi_read_data_submit(struct ftdi_context *ftdi, unsigned char *buf, int size);
int ftdi_transfer_data_done(struct ftdi_transfer_control *tc);
+ void ftdi_transfer_data_cancel(struct ftdi_transfer_control *tc, struct timeval * to);
int ftdi_set_bitmode(struct ftdi_context *ftdi, unsigned char bitmask, unsigned char mode);
int ftdi_disable_bitbang(struct ftdi_context *ftdi);