Creating a Basic Project for MSP430

Building a C Project

This project uses the MSP430FR5969 Launchpad as a reference platform - some aspects will be different if another platform is used.

  1. Create a new directory for the project.

  2. Inside this directory, create a file called blink.c with the following contents:

#include <msp430.h>

int main(void) {
    WDTCTL = WDTPW | WDTHOLD;               // Stop watchdog timer
    P1DIR |= 0x01;                                  // Set P1.0 to output direction

    for(;;) {
        volatile unsigned int i;    // volatile to prevent optimization

        P1OUT ^= 0x01;                              // Toggle P1.0 using exclusive-OR

        i = 10000;                                  // SW Delay
        do i--;
        while(i != 0);
    }

    return 0;
}

  1. Create a Makefile with the following contents:

OBJECTS=blink.o
GCC_DIR = /opt/TI/msp430-gcc/bin
SUPPORT_FILE_DIRECTORY = /opt/TI/msp430-gcc/include

DEVICE = MSP430FR5969
CC = $(GCC_DIR)/msp430-elf-gcc
GDB = $(GCC_DIR)/msp430-elf-gdb
CFLAGS = -I $(SUPPORT_FILE_DIRECTORY) -mmcu=$(DEVICE) -mlarge -mcode-region=either -mdata-region=lower -Og -Wall -gLFLAGS = -L $(SUPPORT_FILE_DIRECTORY) -T $(DEVICE).ld
LFLAGS = -L $(SUPPORT_FILE_DIRECTORY) -Wl,-Map,$(MAP),--gc-sections

all: ${OBJECTS}
    $(CC) $(CFLAGS) $(LFLAGS) $? -o $(DEVICE).out

debug: all
    $(GDB) $(DEVICE).out

  1. Run the make command to build the binary.

Loading the Binary

  1. Open a terminal window and run LD_LIBRARY_PATH=/opt/TI/msp430_toolchain/lib /opt/TI/msp430_toolchain/bin/mspdebug tilib

    1. In a seperate terminal window, run make debug

  3. In the gdb menu, run target remote :2000

  4. Run load to load the binary onto the MSP430

  5. Run continue to start the app