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
AR=	arm-elf-ar
RANLIB=	arm-elf-ranlib

CFLAGS=	-O2 -fno-builtin -mthumb-interwork -mthumb
CPPFLAGS=-I. -I../../include -I../../include/condat -I../../gpf/inc \
	-I../../cdginc

OBJS=	dti_int.o dti_kerf.o dti_kerp.o

all:	libdti.a

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

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