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.
Remove the endpoint parameter from endpoint callbacks. This
information is redundant because endpoints are known at
construction time because they must be in the configuration
descriptor.
Make the following fixes:
-deinit in destructor to prevent race conditions
-cancel the reset task before calling it since it may be in progress
-wait for tasks to complete without mutex held
-prevent double connect with _init flag
Add the classes Task, TaskBase and TaskQueue. TaskQueue queue is an
interface class which can be implemented by anything which can run
code. Task and TaskBase are concrete classes which allow callbacks
to be posted to a TaskQueue to be run.
Only assert if disabled endpoints are used when USBDevice is
configured. USBDevice can leave the configured state due to a
reset at any time, which disables all endpoints. Because this
can happen at any time, thread processing could be performing
any endpoint operation. The endpoint operation should return
failure and do nothing in this case, rather than asserting
as this is not an application error.
An assert should only be triggered when an invalid endpoint is
used after the use of USBDevice acknoledges the switch to
configured mode by complete_set_configuration.
In specific this PR fixes the assert caused with the following
sequence:
-ISR: OUT event sent
-ISR: USB reset event
-ISR: USB configure request start
-Thread: OUT event processed on thread and next read starts
***endpoint is used while disabled causing an invalid assert***
-Thread: reset event processed
-Thread: configure event processed
This patch fixes this problem by making the following changes:
1. Operations done on disabled endpoints only assert when in the configured state
2. Adding and removing endpoints is only allowed when
the flag _endpoint_add_remove_allowed is set
3. The flag _endpoint_add_remove_allowed is set on the set
configuration request and cleared if the request is aborted or
fails
Remove calls to unlock which are not preceded by calls to lock.
Also move the location of the unlock underflow assert so unbalanced
unlocking during post processing is caught.
Fix the following warnings:
-[Warning] USBTester.cpp@45,0: #1299-D: members and base-classes will
be initialized in declaration order, not in member initialisation
list order
-[Warning] USBTester.h@41,0: #1300-D: ~USBTester inherits implicit
virtual
-[Warning] USBAudio.cpp@345,0: #1035-D: single-precision operand
implicitly converted to double-precision
-[Warning] USBHID.cpp@29,0: #1300-D: ~AsyncSend inherits implicit
virtual
-[Warning] USBHID.cpp@61,0: #1300-D: ~AsyncRead inherits implicit
virtual
-[Warning] USBHID.cpp@93,0: #1300-D: ~AsyncWait inherits implicit
virtual
-[Warning] EndpointResolver.cpp@125,26: '<<' in boolean context, did
you mean '<' ? [-Wint-in-bool-context]
Update the USBAudio class to use the new USB API. This patch also adds
buffering and blocking functionality so it can be used in practice
from thread context.
Kevin Bracey
Martin Kojtal
Russ Butler
Filip Jagodzinski
Cruz Monrreal II
Juha Ylinen
Maciej Bocianski
Michael Schwarcz
bcostm
TomoYamanaka
Filip Jagodzinski
Russ Butler