Ian Jackson
7bb326d389
eeprom: provide smaller code for SERIAL_ECHOPAIR
SERIAL_ECHOPAIR implies, eventually, two calls to MYSERIAL.print. One
of these has FORCE_INLINE for a per-character loop, and both involve
constructing a method call rather than a simple function call.
Produce better and smaller code by providing three specialised
functions serial_echopair. This saves 672 bytes of program memory
(with EEPROM_SETTINGS and SDSUPPORT enabled).
Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>