Control transfers can transfer less than was requested by the host in the
wLength field. if this short transfer is a multiple of the endpoint's packet
size, a zero length packet must be sent.
Adds tests for a range of control transfer IN requests, and properly supports
this in the core. Based heavily on work by Kuldeep Dhaka.
See https://github.com/libopencm3/libopencm3/pull/505
and https://github.com/libopencm3/libopencm3/pull/194 for original discussion.
Tested with stm32f4, stm32f103 and stm32l053.
This makes it easier to read for most people, and makes it substantially
easier to review changes in the function signatures themselves at a
later date.
This commit implements the support for one interface to have multiple
altsettings. It also adds hook that user can use to perform actions
when the alsetting switch is performed by host.
Changes:
* For backward compatibility, placed a pointer instead of allocating memory for whole interface struct.
* Always execute callback (even if the current interface alternate-settings matches).
* Multiple configuration support.
Signed-off-by: Kuldeep Singh Dhaka <kuldeepdhaka9@gmail.com>
In a composite device if one want to separate code
for each interface, usbd_register_set_config_callback
can now register more than one callback.
Signed-off-by: Franck Jullien <franck.jullien@gmail.com>
We should not add compiler extensions, it is not our job. We are not a
selfcontained project as kernel is so we should not introduce things
like this.
If we need to add some abstraction for this in the future to support
compilers doing these things differently then we will do that the same
way we dealt with the depricated attribute.
Added --terse and --mailback options to the make stylecheck target. It
also does continue even if it enounters a possible error.
We decided on two exceptions from the linux kernel coding standard:
- Empty wait while loops may end with ; on the same line.
- All blocks after while, if, for have to be in brackets even if they
only contain one statement. Otherwise it is easy to introduce an
error.
Checkpatch needs to be adapted to reflect those changes.
This commit add an extra field to the _usbd_device, that allows to
keep track of the number of USB strings which allows simplify
boundaries checking code in usb_standard_get_descriptor.
This commit also changes the index base for strings in
usb_standard_get_descriptor which allows to get rid of necessity to
have a dummy one-character string in a strings array.
Devan Lai