MSP430 Launchpad External Oscillator

Hi,

I'm trying to use the 4MHz external oscillator (XT2) on the MSP-EXP430F5529LP and I have been having significant trouble doing so.

Can someone please let me know what I am doing wrong. All I'm doing in this code is enabling the oscillator, setting the port pins so that I can use the oscillator, and showing the clock output on one of the pins.

Cheers,

Luke

#include <msp430.h>
#include "driverlib.h"

#define SET |=		/* Used as: PORTA SET BIT7; to set bit 7 of port a */
#define CLR &=~		/* Used as: PORTA CLR BIT7; to clear bit 7 of port a */
#define TOGGLE ^=	/* Used as: PORTA TOGGLE BIT7; to toggle bit 7 of port a */

#define TXLED BIT0
#define RXLED BIT6
#define TXD BIT2
#define RXD BIT1

void Initialize_XT2CLK(void);

int main(void)
{
   WDTCTL = WDTPW + WDTHOLD;     //Stop WDT
   P2DIR = 0x04;                 //Set pin 2.2 to display SMCLK
   P2SEL = 0x04;
   
   Initialize_XT2CLK();
   while (1)
   { }
}

void Initialize_XT2CLK(void){
  P5SEL SET BIT2;      //Configure XT2 IO pins
  UCSCTL4 = SELS__XT2CLK | SELM__XT2CLK | SELA__XT2CLK; //Set XT2 as OSC for all Clocks
  UCSCTL5 = 0x0000;               //Prescalers
  UCSCTL6 = XT1OFF;               //Disable XT1
}