This patch adds support for GDB packets and serial console demuxing. To use it start flterm with --gdb-passthrough. Then start gdb and run the following commands: set remote interrupt-on-connect on target remote <pseudo terminal printed by flterm> Note: there is _no_ 'set remote interrupt-sequence BREAK'. flterm takes care of converting Ctrl+C (ETX) to a BREAK.
…downstream data register in full duplex operation