CCS/MSP430F5529: Code under while(1) is not running

Hi Deepak,

Do you receive any error messages or symbols when attempting to run the code?

Do you know how to  step through your code with Code Composer Studio? Please see section 7.4 of this Debug Overview on how to Debug your project in CCS.

-Chris

I am not familiar with this MCU, but usually this happens when you have the interrupt set to put the MCU to sleep when it returns. When that happens it just waits for another interrupt and does not execute any other code.

In driverlib you call:

Interrupt_disableSleepOnIsrExit ( void )

Hi Chris,

I am not getting any error message while debugging code.

I am explaining my scenario below.

Actually I put a small code of LED on/off by switch inside while(1) loop and on other side configure interrupts. 

After running the code I couldn't control LED on/off through switch that was written inside while(1) loop.  

On 2nd iteration I commented out    //__bis_SR_register(LPM0_bits + GIE); and checked again this time my code under while(1) loop started running and I could perform LED on/off by switch.

Regards

Deepak

Deepak,

Apologies for the delayed response here.

It sounds like you are entering LPM0 before executing the rest of your code. Do you mind posting a snippet of your code and your ISR to turn on the LED?

-Chris

Hi Chris,

I am attaching a file of my basic code of timer and GPIO inside while(1) loop. This I did when I started working on this MSP430F module.

But in our product I am using I2C to read accelerometer + driving stepper motor + UART.. For I2C I have taken reference from ".....usci i2c standard master" which uses LPM0 at multiple locations.

Regards

Deepak

#include <msp430.h>
#include <msp430f5529.h>


/**
 * main.c
 */
unsigned int i = 0;
int main(void)
{
	WDTCTL = WDTPW | WDTHOLD;	// stop watchdog timer
	
	P1DIR = 0x01;

	P1OUT = 0x01;

	 P2DIR &= ~0x02;                // P1.3 (SW2) -> Input

	    P2REN |= 0x02;              // P1.3 Pull Up/Down Enable

	    P2OUT |= 0x02;              // P1.3 Pull Up Enable

	    TA0CCR0 = 20000;      //setting timeout value
	    TA0CCTL0 |= CCIE ;        // Enabled overflow interrupt

	    TA0CTL |= MC_1 + TASSEL_2 + TACLR;   // Set Mode -> Up Count, Clock -> ACLK, Clear Timer

	    __bis_SR_register(LPM0_bits + GIE); // Goto LPM3 (Only ACLK active), Enable CPU Interrupt
        // __enable_interrupt();

	while(1)
	{
	    if(P2IN & 0x02)
	    {
	        P1OUT |= 0x01;
	    }
	    else
	    {
	            P1OUT &=~ 0x01;
	    }
	  //  if(P2)
	    /*P1OUT ^= 0x01;
	    for(i=0; i< 10000; i++)
	    {

	    }*/
	    return 0;
	}

}

#pragma vector = TIMER0_A0_VECTOR       // CCR0 Interrupt Vector
__interrupt void Timer0_A0_ISR(void)

{
      P1OUT ^= 0x01;                       // Toggle LED

}

Thanks,

JD