tools/: add cross-compilation for the Ben NanoNote

This uses the OpenWRT toolchain. It creates a static executable that will
also run on JLime. Graphical output is disabled so far.

tools/Makefile

@@ -16,16 +16,22 @@ MAIN = antorcha
 CFLAGS = -g -I../fw -I../../ben-wpan/tools/include \
 	 -I../../ben-wpan/atusb/fw/include \
 	 -Wall \
-	 $(shell sdl-config --cflags)
-LDLIBS = -L../../ben-wpan/tools/lib -latrf -lusb \
-	 $(shell sdl-config --libs) -lSDL_gfx
+	 $(if $(NOGFX),, -DGFX $(shell sdl-config --cflags)) \
+	 $(if $(BEN), -static)
 
-OBJS = antorcha.o hash.o plot.o
+LDLIBS = -L../../ben-wpan/tools/lib -latrf  \
+	 $(if $(NOGFX),, $(shell sdl-config --libs) -lSDL_gfx) \
+	 $(if $(BEN),, -usb)
 
-.PHONY:		all update ping off
+OBJS = antorcha.o hash.o $(if $(NOGFX),, plot.o)
+
+.PHONY:		all ben update ping off
 
 all:		$(MAIN)
 
+ben:
+		$(MAKE) NOGFX=y BEN=y CC=mipsel-openwrt-linux-gcc
+
 $(MAIN):	$(OBJS)
 		$(CC) $(CFLAGS) -o $@ $(OBJS) $(LDLIBS)
 

tools/antorcha.c

@@ -437,9 +437,12 @@ static void samples(struct atrf_dsc *dsc, int gui)
 
 	buf[0] = 1;
 	packet(dsc, SAMPLE, 0, 0, buf, PAYLOAD);
+
+#ifdef GFX
 	if (gui)
 		plot_init();
 	else
+#endif
 		signal(SIGINT, sigint);
 	while (run) {
 		got = rf_recv(dsc, buf, sizeof(buf));
@@ -475,11 +478,15 @@ static void samples(struct atrf_dsc *dsc, int gui)
 			if (!gui)
 				printf("%11.6f\t%d\n", t, y);
 
+#ifdef GFX
 			if (gui && !plot(x, y))
 				goto quit;
+#endif
 		}
 	}
+#ifdef GFX
 quit:
+#endif
 	buf[0] = 0;
 	packet(dsc, SAMPLE, 0, 0, buf, PAYLOAD);
 }
@@ -513,7 +520,9 @@ static void usage(const char *name)
 "  -P       ping (version query)\n"
 "  -R       reset\n"
 "  -S       sample with output on stdout. Exit with ^C.\n"
+#ifdef GFX
 "  -S -S    sample with graphical output. Exit with Q.\n\n"
+#endif
 "Parameters:\n"
     , name, "", name, "", name, "", name, "", name);
 	for (m = map; m->name; m++)