AT command interface works! The cause of the breakage was the same Nucleus API issue with NU_Create_Timer() which we encountered at the very beginning of this project with Riviera timers: the code in uartfax.c from TCS211 was passing 0 as the initial dummy value for the timer duration, and our FreeNucleus version doesn't like it. The fix is the same: pass 1 as the initial dummy value instead.

CC=	arm-elf-gcc
CFLAGS=	-Os -fno-builtin
AR=	arm-elf-ar
RANLIB=	arm-elf-ranlib

OBJS=	doprnt.o printf.o putchar.o puts.o sprintf.o sprintf_putchar.o \
	vprintf.o vsprintf.o

all:	libprintf.a

libprintf.a:	${OBJS}
	${AR} cru $@ ${OBJS}
	${RANLIB} $@

clean:
	rm -f *.[oa] *errs