Version vom 27. Juni 2013, 23:19 Uhr

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Tux mit MSP430-Launchpad

Warum ein MSP430-Launchpad?

Hardware

MSP430

MSP430-Launchpad

Toolchain

• binutils-msp430
• gcc-msp430
• gdb-msp430
• msp430-libc
• msp430mcu
• mspdebug

"Hello World"

Das Programm

#include  <msp430.h>

#define LED_RED		(1 << 0)      // rote LED an PIN0
#define LED_GREEN	(1 << 6)      // gruene Led an PIN6

//***************************************
void delay_ms(unsigned int ms){
    while(ms--){
        __delay_cycles(1000);
    }
}

//***************************************
//***************************************
//***************************************
int main(void)
{
    WDTCTL = WDTPW + WDTHOLD;	      // watchdog ausschalten
    P1DIR |= LED_RED | LED_GREEN;     // LED-Pins als Ausgaenge
    P1OUT = 0;			      // alle LEDs aus
    P1OUT |= LED_GREEN;		      // gruene LED ein
    while(1) {			      // Enlosschleife
        P1OUT ^= LED_RED + LED_GREEN; // LEDs toggle
        delay_ms(500);		      // 500ms Pause
    }
}

Programm übersetzen und auf MCU übertragen

msp430-gcc -mmcu=msp430g2452 -o blink blink.c

> mspdebug rf2500
...

(msdebug) prog blink
Erasing...
Programming...
Writing  186 bytes to e000 [section: .text]...
Writing   32 bytes to ffe0 [section: .vectors]...
Done, 218 bytes written

(mspdebug) run
Running. Press Ctrl+C to interrupt...

PROJ=blink

CC=msp430-gcc
MCU=msp430g2452
CFLAGS=-Os -g -Wall -mmcu=$(MCU)  
LDFLAGS=-g -mmcu=$(MCU)
      
OBJS=$(PROJ).o  
      
all:$(OBJS)  
    $(CC) $(LDFLAGS) -o $(PROJ).elf $(OBJS)
    msp430-size $(PROJ).elf
      
clean:  
    rm -fr $(PROJ).elf $(OBJS)  
      
flash:
    mspdebug rf2500 'erase' 'load $(PROJ).elf' 'exit'

Debuggen

> mspdebug rf2500
...

(mspdebug) gdb
Bound to port 2000. Now waiting for connection...

> msp430-gdb blink.elf
...
(gdb) target remote localhost:2000
...
(gdb)

> kdbg -r localhost:2000 blink1.elf

Ausblick

Weiterführende Links

• http://www.mycontraption.com/programming-the-msp430-launchpad-on-ubuntu/
• http://manpages.ubuntu.com/manpages/precise/man1/mspdebug.1.html
• http://wiki.ubuntuusers.de/MSP430-Toolchain
• http://www.itopen.it/2013/03/01/msp430-energia-on-linux/
• http://losinggeneration.homelinux.org/2010/07/02/msp430-launchpad-on-linux/
• http://recursive-labs.com/static/courses/rl100/samples/mspstart.pdf
• http://launchpadlinux.blogspot.de/2012/10/making-thinks-easier-with-make-and-geany.html
• http://dbindner.freeshell.org/msp430/
• http://gpio.kaltpost.de/?cat=55

Kontakt

Uwe