#
# Makefile for msp430
#
# 'make' builds everything
# 'make clean' deletes everything except source files and Makefile
# 'make install' builds everything, and programs the MSP430 using MSPFLASHER
# You need to set TARGET, MCU and SOURCES for your project.
# TARGET is the name of the executable file to be produced
# $(TARGET).elf $(TARGET).hex and $(TARGET).txt nad $(TARGET).map are all generated.
# The TXT file is used for BSL loading, the ELF can be used for JTAG use
#
TARGET     = project0
MCU        = msp430f5529
# MSP430Flasher name
MSPFLASHER = MSP430Flasher
# List all the source files here
# eg if you have a source file foo.c then list it here
SOURCES = main.c delay.c
# Include are located in the Include directory
INCLUDES = -IInclude
# Add or subtract whatever MSPGCC flags you want. There are plenty more
#######################################################################################
CFLAGS   = -mmcu=$(MCU) -g -Os -Wall -Wunused $(INCLUDES)
ASFLAGS  = -mmcu=$(MCU) -x assembler-with-cpp -Wa,-gstabs
LDFLAGS  = -mmcu=$(MCU) -Wl,-Map=$(TARGET).map
########################################################################################
CC       = msp430-elf-gcc
LD       = msp430-elf-ld
AR       = msp430-elf-ar
AS       = msp430-elf-gcc
NM       = msp430-elf-nm
OBJCOPY  = msp430-elf-objcopy
RANLIB   = msp430-elf-ranlib
STRIP    = msp430-elf-strip
SIZE     = msp430-elf-size
READELF  = msp430-elf-readelf
MAKETXT  = srec_cat
CP       = cp -p
RM       = rm -f
MV       = mv
########################################################################################
# the file which will include dependencies
DEPEND = $(SOURCES:.c=.d)
# all the object files
OBJECTS = $(SOURCES:.c=.o)
all: $(TARGET).elf $(TARGET).hex $(TARGET).txt
$(TARGET).elf: $(OBJECTS)
	echo "Linking $@"
	$(CC) $(OBJECTS) $(LDFLAGS) $(LIBS) -o $@
	echo
	echo ">>>> Size of Firmware <<<<"
	$(SIZE) $(TARGET).elf
	echo
%.hex: %.elf
	$(OBJCOPY) -O ihex $< $@
%.txt: %.hex
	$(MAKETXT) -O $@ -TITXT $< -I
	unix2dos $(TARGET).txt
#  The above line is required for the DOS based TI BSL tool to be able to read the txt file generated from linux/unix systems.
%.o: %.c
	echo "Compiling $<"
	$(CC) -c $(CFLAGS) -o $@ $<
# rule for making assembler source listing, to see the code
%.lst: %.c
	$(CC) -c $(ASFLAGS) -Wa,-anlhd $< > $@
# include the dependencies unless we're going to clean, then forget about them.
ifneq ($(MAKECMDGOALS), clean)
-include $(DEPEND)
endif
# dependencies file
# includes also considered, since some of these are our own
# (otherwise use -MM instead of -M)
%.d: %.c
	echo "Generating dependencies $@ from $<"
	$(CC) -M ${CFLAGS} $< >$@
.SILENT:
.PHONY:	clean
clean:
	-$(RM) $(OBJECTS)
	-$(RM) $(TARGET).*
	-$(RM) $(SOURCES:.c=.lst)
	-$(RM) $(DEPEND)
install: $(TARGET).txt
	  $(MSPFLASHER) -n $(MCU) -w "$(TARGET).txt" -v -z [VCC]

#include "delay.h"

//Tell GCC to not optimize out the delay loop
#pragma GCC push_options
#pragma GCC optimize ("0")
void delay(uint16_t delayCounts) {
	uint16_t i = 0;

	//Delay between LED toggles. This for-loop will run until the condition is met.
	//In this case, it will loop delayCounts number of times
	for(i=0; i < delayCounts; i++);
}
#pragma GCC pop_options

#ifndef DELAY_H
#define DELAY_H

#include <stdint.h>

void delay(uint16_t);

#endif

#include <msp430.h>
#include <stdbool.h>
#include "delay.h"

int main(void) {
	WDTCTL = WDTPW + WDTHOLD;
	// Stop watchdog timer. This line of code is needed at the beginning of most MSP430 projects.
	// This line of code turns off the watchdog timer, which can reset the device after a certain period of time.
	P1DIR |= 0x01;
	// P1DIR is a register that configures the direction (DIR) of a port pin as an output or an input.
	// To set a specific pin as output or input, we write a '1' or '0' on the appropriate bit of the register.
	// P1DIR = <PIN7><PIN6><PIN5><PIN4><PIN3><PIN2><PIN1><PIN0>
	// Since we want to blink the on-board red LED, we want to set the direction of Port 1, Pin 0 (P1.0) as an output
	// We do that by writing a 1 on the PIN0 bit of the P1DIR register
	// P1DIR = <PIN7><PIN6><PIN5><PIN4><PIN3><PIN2><PIN1><PIN0>
	// P1DIR = 0000 0001
	// P1DIR = 0x01 <--this is the hexadecimal conversion of 0000 0001

	while(true)
	// Conditional is always true, so we loop forever
	{
		P1OUT ^= 0x01;
		// Toggle P1.0 using exclusive-OR operation (^=)
		// P1OUT is another register which holds the status of the LED.
		// '1' specifies that it's ON or HIGH, while '0' specifies that it's OFF or LOW
		// Since our LED is tied to P1.0, we will toggle the 0 bit of the P1OUT register
		delay(20000);
	}

	return 0;
}