arm: async echo app

arm/makefile

@@ -15,14 +15,16 @@ LDFLAGS = -march=armv6-m \
 		  -Wl,--gc-sections -Os \
 		  -Wl,--print-memory-usage -flto
 
+includes += -Ihal/cmsis
+
 sources += hal/lib/common/xil_assert.c
 includes += -Ihal/lib/common
 
-sources += hal/uart/xuartlite.c hal/uart/xuartlite_stats.c
+sources += hal/uart/xuartlite.c hal/uart/xuartlite_stats.c hal/uart/xuartlite_intr.c
 includes += -Ihal/uart
 
 bootloader_objects = uart.o bootloader.o vector_table.o $(sources:.c=.o)
-app_objects = app_init.o main.o
+app_objects = app_init.o crash.o main.o uart.o stdlib.o async.o trace.o $(sources:.c=.o)
 
 CPPFLAGS += $(includes)
 
@@ -37,10 +39,21 @@ bootloader.elf: $(bootloader_objects) bootloader.ld
 app.elf: $(app_objects) app.ld
 	$(LD) -Wl,-Tapp.ld $(LDFLAGS) -o $@ $(app_objects)
 
-%.elf:
-	$(LD) -Wl,-Tapp.ld $(LDFLAGS) -o $@ $^
+.PHONY: clean test
 
-.PHONY: clean
+deps = $(app_objects:.o=.d) $(bootloader_objects:.o=.d)
 
 clean:
-	rm -rf *.elf *.bin $(app_objects) $(bootloader_objects)
+	rm -rf *.elf *.bin $(tests) $(app_objects) $(bootloader_objects) $(deps)
+
+HOSTCXX = clang++
+
+tests = ring_buffer_test
+
+test: $(tests)
+
+ring_buffer_test: ring_buffer_test.cc
+	$(HOSTCXX) -std=c++2a -o $@ $< -lgmock -lgtest -lgtest_main
+	./$@
+
+-include $(deps)