Add implementation of USART and more ground changes

1 files changed, 47 insertions, 0 deletions

diff --git a/avr-ioe.mk b/avr-ioe.mk
new file mode 100644
index 0000000..1248f11
--- /dev/null
+++ b/avr-ioe.mk
@@ -0,0 +1,47 @@
+ifndef IOE_PREFIX
+	IOE_PREFIX = .
+endif
+
+IOE_SRC_SPI = $(IOE_PREFIX)/src/spi.c
+IOE_SRC_USART = $(IOE_PREFIX)/src/usart.c
+IOE_SRC = $(IOE_SRC_SPI) $(IOE_SRC_USART)
+
+IOE_OBJ_SPI = $(patsubst %.c,%.o,$(IOE_SRC_SPI))
+IOE_OBJ_USART = $(patsubst %.c,%.o,$(IOE_SRC_USART))
+IOE_OBJ = $(patsubst %.c,%.o,$(IOE_SRC))
+
+IOE_DEP_SPI = $(patsubst %.c,%.d,$(IOE_SRC_SPI))
+IOE_DEP_USART = $(patsubst %.c,%.d,$(IOE_SRC_USART))
+IOE_DEP = $(patsubst %.c,%.d,$(IOE_SRC))
+
+
+ifndef IOE_ONLYPATHS # Following section can be suppressed by defining this variable
+
+ifneq ($(MAKECMDGOALS),clean)
+ifneq ($(MAKECMDGOALS),help)
+-include $(IOE_DEP)
+endif
+endif
+
+ifndef F_CPU
+	$(error Please define F_CPU variable in makefile before including avr-ioe.mk)
+endif
+ifndef MMCU
+	$(error Pleade define MMCU variable in makefile before including avr-ioe.mk)
+endif
+IOE_CFLAGS ?= -Os -ffunction-sections -fdata-sections -fshort-enums -Wall
+IOE_CFLAGS += -DF_CPU=$(F_CPU) -mmcu=$(MMCU)
+IOE_GCC ?= avr-gcc
+
+$(IOE_OBJ): %.o: %.c
+	$(IOE_GCC) $(IOE_CFLAGS) -c -o $@ $<
+
+$(IOE_DEP): %.d: %.c
+	$(IOE_GCC) -MM -MG -MT '$*.o $@' $(IOE_CFLAGS) -c -o $@ $<
+
+.PHONY: ioeclean
+ioeclean:
+	$(RM) $(IOE_OBJ)
+	$(RM) $(IOE_DEP)
+
+endif