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=	-O2 -fno-builtin -mthumb-interwork -mthumb
AR=	arm-elf-ar
RANLIB=	arm-elf-ranlib

OBJS=	float.o integer.o sprintf.o strtok.o vspcore.o

all:	libsprintf.a

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

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