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Cast pins to signed integers to avoid Wtype-limits compile warning
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Do not claim AT-protocol in CDC interface descriptor
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Add placement new operator
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Add parameter names to common prototypes
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using with ternary operator such as bitWrite(value, bit, some_computed_value == 5 ? 1: 0);'
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Fix unused variable warning for non-pluggable USB in SendDescriptor
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checking `length` in below while statement
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The CDC code presents itself as a virtual serial port. However, it also
sets the "bFunctionProtocol" value to 1, which means it supports
AT-commands, which is not actually the case. This might cause problems
with some software, such as ModemManager.
Originally, ModemManager would be very liberal with probing serial
devices, using a blacklist to prevent probing non-modems such as
Arduinos.
Since version 1.7.990, it has supported a "strict" mode where it tries to be
more restrained in what devices it probes. For CDC ACM devices, this
means it will only probe devices that claim to support AT-commands.
However, it also stopped applying the blacklist (intending to eventually
remove the blacklist), meaning it would again probe Arduinos.
This new strict policy is not the upstream default, but is enabled in
Debian (since Buster) and Ubuntu (since bionic 18.04.2).
The proper way to fix this, is to not claim AT comand support in the USB
device descriptor, which is what this commit does. The Arduino will
still show up as a virtual serial port, just not be probed by
ModemManager in strict mode.
For the commit that introduced the strict mode in ModemManager, see
https://cgit.freedesktop.org/ModemManager/ModemManager/commit/src?id=ee570d44dc117dc69f23e83313dd877f76c5e3e0
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Avoids unused variable warning if USB is enabled but pluggable USB is not
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Putting the parameter names in these commonly used prototypes makes syntax help like VS Code's Intellisense work 99% more useful. Without them, it doesn't give you the names of the parameters and you have to remember the semantics yourself. :(
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These are currently implemented by the Wire library, on twi.c
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Based on code originally by Rob van der Veer <rob.c.veer@gmail.com>, this adds
USBDevice.isSuspended(), so user sketches can run custom code in their `loop`
methods after checking if the device is suspended or not.
Signed-off-by: Gergely Nagy <algernon@keyboard.io>
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The standard mandates that placement new should be have a noexcept specifier.
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Casting to void is a well known trick for prevening 'unused parameter' warnings.
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Make write to UDR and clearing of TXC bit in flush() atomic
to avoid race condition.
Fixes #3745 (second different issue introduced later but discussed
in the same issue)
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Preserve values of configuration bits MPCMn and U2Xn.
Avoid setting other read-only bits for datasheet conformance.
See #3745
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Moving the head buffer pointer and setting interrupt flag is now
atomic in write(). Previously an intervening ISR could empty the
buffer before the second ISR is triggered causing retransmission.
Fixes: #3745 (original issue only)
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New macro TX_BUFFER_ATOMIC makes the following code block atomic
only if the transmit buffer is larger than 256 bytes. SREG is restored
on completion.
The macro is then used to simplify code for availableForWrite()
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Instead of checking for the NEW_LUFA_SIGNATURE once in program memory and then
setting a flag which is used for further checks, a function is used that always
checks program memory directly.
If a flag is used, there's a slight chance that its location in RAM could fall
on MAGIC_KEY_POS. In this case, an aborted USB auto-reset sequence may fail.
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An auto-reset invoked using USB CDC is triggered by the port closing
(when set to 1200 baud). Closing of the port is indicated by DTR going inactive.
There is no need to have auto-reset invoked by a CDC_SET_LINE_CODING command.
Only the CDC_SET_CONTROL_LINE_STATE command, which indicates a change in the
state of DTR, should be used.
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The state of the watchdog timer is saved during a USB auto-reset and then
restored if the reset is aborted, in case the sketch is using the watchdog.
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In the USB CDC code to invoke an auto-reset, the magic key location could be
restored before it had actually been saved. The sketch would then have a
corrupted value at this location. This fix prevents the value from being
restored if it hasn't previously been saved.
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24, 44 and 84
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These functions were changed from private to protected in https://github.com/arduino/Arduino/commit/99f2a2755349784835130147e46cb61659b85893 but the comments were not updated at that time.
In conjunction with equivalent pull requests to Arduino SAM Boards and Arduino SAMD Boards, solves https://github.com/arduino/Arduino/issues/6146.
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see https://github.com/arduino/Arduino/pull/5789#discussion_r118007759
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This method originally flushed pending input bytes, which makes sense in
Stream. At some point it was changed to flush output bytes instead, but
it was never moved to Print to reflect this.
Since Stream inherits from Print, this should not really affect any
users of the Stream or Print classes. However to prevent problems with
existing implementations of the Print class that do not provide a
flush() implementation, a default implementation is provided. We should
probably remove this at some point in the future, though.
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If available() is in the base Stream class, then availableForWrite() should be in the base Print class
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Interface Association Descriptor" and "USB Interface Association Descriptor Device Class Code and Use Model"
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See #5732 #4864 #4138 #3946
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This reverts commit 817d700a7503b269f986075cad637ce56c657e37.
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Fix #4784
Close #4791
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Change double quotes to single quotes
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Signed-off-by: Patrick Roncagliolo <ronca.pat@gmail.com>
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- "." is a string literal, and so is treated as the char '.' plus the null char '\0'.
- Single quotes reduces the necessary memory for this literal to only one char instead.
A string literal as the one actually present may require the use of the
method "write(const char *str)", so there could be also a performance overhead.
- Another reason to change quotes style is for consistency with line 235.
Signed-off-by: Patrick Roncagliolo <ronca.pat@gmail.com>
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`toFloat` internally converts into double and then truncates into a
float, so why not add a method to return the double?
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Add all analog references supported by the ATtinyX5 series
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I was compiling with -Werror and this little error popped up
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[AVR][USB] Configurable USB_VERSION value via define
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Send an USB remote wakeup if data need to be written
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