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
CPPFLAGS=-I../inc
LD=	arm-elf-ld

sinclude ../../include/config.mk

ifeq (${CONFIG_GSM},1)
CONFIG_MODULE=	gsmcomp
else
CONFIG_MODULE=	barecomp
endif

OBJS=	gpf_misc_init.o gpf_tst_drv.o ${CONFIG_MODULE}.o

all:	xipcode.o

xipcode.o:	${OBJS}
	${LD} -r -o $@ ${OBJS}

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