Introduce a routine in libsigrok's internal serial layer which lets
applications manipulate the state of handshake signals (RTS and DTR)
after the serial port got opened and configured. This allows for timed
pulses which cannot get expressed with static "rts=1" etc phrases in
parameter strings, and allows handshake signal control while leaving
bitrate and frame format untouched. Applications specify which signals
to modify while other signals remain as they are (ternary input).
Do implement the signal manipulation in the libserialport transport,
do nothing and silently pass in the HID and BT transports. These can
get extended later as the need arises, depending on the HID chips' and
RFCOMM peers' capability to control these signals. This extension is
transparent to application code (acquisition device drivers).
Introduce the serial_bt.c source file which implements the methods of a
serial transport and calls into the platform agnostic src/bt/ support
code.
Implement support for several chips and modules: RFCOMM (BT classic,
tested with HC-05), BLE122 (tested with 121GW), Nordic nRF51, and TI
CC254x (the latter untested). Read support is assumed to be complete,
write support for BLE may be incomplete due to lack of access to
hardware for tests.
Gerhard Sittig
Uwe Hermann