Deprecate wait() in favour of acquire(), try_acquire(),
try_acquire_for() and try_acquire_until().
Brings Semaphore more into line with CMSIS-RTOS 2 (which uses "acquire"),
itself (as it has "release"), and other classes having "try", "try for"
and "try until".
Also steps away from vague "wait" term - the primary operation here is
to acquire the semaphore, and this will of course sleep.
Reimplement atomic code in inline assembly. This can improve
optimisation, and avoids potential architectural problems with using
LDREX/STREX intrinsics.
API further extended:
* Bitwise operations (fetch_and/fetch_or/fetch_xor)
* fetch_add and fetch_sub (like incr/decr, but returning old value -
aligning with C++11)
* compare_exchange_weak
* Explicit memory order specification
* Basic freestanding template overloads for C++
This gives our existing C implementation essentially all the functionality
needed by C++11.
An actual Atomic<T> template based upon these C functions could follow.
None of the USB drivers currently support entering deep sleep mode
while USB is active. To protect USB from malfunctioning lock deep
sleep in USBPhyHw::init.
I implemented USB Device feature for Renesas mbed boards.
The code referenced the following code as a starting point and is implemented it by inheritting USBPhy same as other boards.
(mbed-os\features\unsupported\USBDevice\targets\TARGET_RENESAS)
Ignore interrupts on disabled USB endpoints. This prevents handling
interrupts when in the wrong state.
Prior to this patch when running the serial test on a K64F the assert
on line 908 of USBDevice.cpp would sometimes be triggered. This
assert indicates that an endpoint 0 IN interrupt occurred before
the device was ready.
This occurs during the test_cdc_usb_reconnect test when the host sends
a "Set Control Line State" USB request and the device acknowledges it
just before USB is disconnected.
It is undefined behavior if stalling and unstalling clears an ongoing
transfer. Abort any ongoing transfers explicitly when stalling and
unstalling so the behavior is consistent across devices.
If an IN endpoint is stalled during a transfer then the data being
sent will repeated and flood the USB bus. This patch prevents
endpoints from being stalled in the middle of a transfer by control
requests by keeping USB suspended until the setup phase of the
control request is done.
Add second constructor and reorder constructor parameters to match
other USB classes. Also remove the ready() function since there
are no calls that can only mbe made from a ready state.
George Beckstein
Kevin Bracey
Martin Kojtal
Russ Butler
Filip Jagodzinski
Cruz Monrreal II
Juha Ylinen
Maciej Bocianski
bcostm
TomoYamanaka
Filip Jagodzinski
Russ Butler