Added support for SDCC and did a clean-up since it has been a long ti…

…me (close to 4 years !)

- Added Keil µVision project file
- Updated README.md
- Added .gitignore

.gitignore

@@ -0,0 +1,12 @@
+Listings/
+Objects/
+build/
+*.hex
+*.ihx
+*.bin
+*.rel
+*.lst
+*.map
+*.uvgui.*
+*.uvopt
+*.pdsprj.*.workspace

Makefile

@@ -0,0 +1,78 @@
+############ Tools #########################
+
+CC = sdcc
+AS = sdas8051
+LD = sdld
+HEX_TOOL = packihx
+BIN_TOOL = makebin
+
+############# Project Settings ##############
+
+OUTPUT = Race_stop_watch
+
+ASM_SRCS +=
+
+C_SRCS += main.c
+
+INCLUDE_PATHS +=
+
+########## Compiler/Linker Flags ############
+
+ASMFLAGS += -l -o
+
+CFLAGS += -mmcs51 -c 
+
+LDFLAGS +=
+
+#############################################
+
+OBJ_DIR = build
+
+C_FILES = $(notdir $(C_SRCS))
+C_OBJS = $(addprefix $(OBJ_DIR)/, $(C_FILES:.c=.rel))
+C_PATHS = $(sort $(dir $(C_SRCS)))
+vpath %.c $(C_PATHS)
+
+ASM_OBJS = $(ASM_SRCS:.asm=.rel)
+ASM_PATHS = $(sort $(dir $(ASM_SRCS)))
+vpath %.asm $(ASM_PATHS)
+
+OBJS = $(C_OBJS) $(ASM_OBJS) 
+
+IHX = $(OBJ_DIR)/$(OUTPUT).ihx
+
+HEX = $(OUTPUT).hex
+BIN = $(OUTPUT).bin
+
+############## Make targets #################
+
+all: $(HEX) $(IHX) $(BIN)
+
+$(BIN) : $(HEX)
+	@echo [ BIN ] $@
+	@$(BIN_TOOL) -p "$<" "$@"
+
+$(HEX) : $(IHX)
+	@echo [ HEX ] $@
+	@$(HEX_TOOL) "$<" > "$@" 
+
+$(OBJ_DIR):
+	@echo [ MKDIR ] $@
+	@mkdir "$@"
+
+$(IHX): $(OBJ_DIR) $(OBJS)
+	@echo [ LD ] $@
+	@$(CC) $(LDFLAGS) -o $@ $(OBJS)
+
+$(OBJ_DIR)/%.rel: %.c
+	@echo [ CC ] $< 
+	@$(CC) $(CFLAGS) $(addprefix -I,$(INCLUDEPATHS)) -o "$@" "$<"
+
+%.rel: %.asm
+	@echo [ AS ] $< 
+	@$(AS) $(ASMFLAGS) $<
+
+clean:
+	rm -rf $(OBJ_DIR) $(HEX) $(BIN) $(ASM_OBJS) *.rel *.lst *.rst
+
+

README.md

@@ -1,5 +1,27 @@
-Open race_stop_watch.pdsprj using Proteus 8. Just click play button to run the simulation.
+# Race Stop Watch
 
-Source code is found in main.c
-If you are modifying the code,compile the code and generate HEX file Keil µVision IDE (C51)
-Use the modified HEX file to run the simulation.
+Open `race_stop_watch.pdsprj` using Proteus 8. Just click play button to run the simulation.
+
+Code can be compiled with either Keil µVision IDE (C51) or SDCC
+- Keil µVision IDE (C51) 
+    - Download and install [Keil C51](http://www.keil.com/c51/)
+    - Open `Race_stop_watch.uvproj` and click `Build`
+- SDCC 
+    - Install [SDCC](http://sdcc.sourceforge.net/)
+        - Windows - Get [MSYS2](https://www.msys2.org/) and SDCC 
+          [32-bit installer](https://sourceforge.net/projects/sdcc/files/snapshot_builds/i586-mingw32msvc-setup/)/ 
+          [64-bit installer](https://sourceforge.net/projects/sdcc/files/snapshot_builds/x86_64-w64-mingw32-setup/)
+        - Debian based (Eg: Ubuntu) - `sudo apt install sdcc`
+        - macOS - `brew install sdcc`
+    - Run `make`
+
+Use the generated HEX file `Race_stop_watch.hex` to run the Proteus simulation.
+
+![Race Stop Watch](Screenshot_Proteus_simulation.JPG)
+
+---
+
+## Changelog
+
+- March 2016 - Initial version
+- December 2019 - Added support for SDCC