Its default is SKIP_ALL which reflects previous versions.
However SKIP_NONE, and SKIP_WHITESPACE can refine this behaviour.
A parameter used in the protected overloads of parseInt/Float has been
changed from `skipChar` to `ignore`.
From the data sheet TXCOMP is only set after a stop or repeated start
and address change, but EOSACC is set for a stop or repeated start when
the address remains the same. This change removes the check for TXCOMP
when not idle, to support repeated starts for both RX and TX.
also moved common reset and disable code in libsam TWI_ConfigureMaster
and TWI_ConfigureSlave functions to new TWI_Disable function, which is
used in TwoWire::end()
In particular HIDDescriptorListNode.cb has been renamed to
HIDDescriptorListNode.descriptor because it contains decriptor data
and not callbacks.
Moreover the HID_Descriptor.descriptor field has been renamed
to HID_Descriptor.data so the structure has now two fields length
and data.
typedef struct __attribute__((packed)) {
uint16_t length;
const void* data;
} HID_Descriptor;
class HIDDescriptorListNode {
public:
HIDDescriptorListNode *next = NULL;
const HID_Descriptor *descriptor;
HIDDescriptorListNode(const HID_Descriptor *d) : descriptor(d) { }
};
This imply a change in the use of the node from:
node->cb->lenght
node->cd->descriptor
to
node->descriptor->length
node->descriptor->data
This allows a sketch to find out the settings chosen by the USB host
(computer) and act accordingly.
Other than reading the DTR flag and checking if the baudrate is 1200,
the regular CDC code doesn't actually use any of these settings.
By exposing these settings to the sketch, it can for example copy them
to the hardware UART, turning the Leonardo into a proper USB-to-serial
device. This can be useful to let the computer directly talk to whatever
device is connected to the hardware serial port (like an XBee module).
The Teensy core already supported these methods. This code was
independently developed, but the method names were chosen to match the
Teensy code, for compatibility (except that `dtr()` and `rtr()` return
`bool`, while the Teensy version return a `uint8_t`).
This change is applied to both the avr and sam cores, which have a very
similar CDC implementation.
