CCS/MSP430FR2033: Timer interrupt causes isr_trap.asm to run while application hangs

YANG DOOYONG

Part Number: MSP430FR2033

Tool/software: Code Composer Studio

Hi.

I am studying for the first time development with MSP430fr2033 chip.
CCS encountered a fatal error while running the timer example program below.

when debug the code, it jumps to the below code and fall into an error.

global __TI_ISR_TRAP
__TI_ISR_TRAP:
BIS.W # (0x0010), SR
JMP __TI_ISR_TRAP

I don't know why.

I will be very grateful if you help me.

Source code is below.

#include <msp430.h>

int main (void)
{
WDTCTL = WDTPW | WDTHOLD; // Stop WDT

    // Configure GPIO
    P1DIR | = BIT0; // P1.0 output
    P1OUT | = BIT0; // P1.0 high

    // Disable the GPIO power-on default high-impedance mode to activate
    // previously configured port settings
    PM5CTL0 & = ~ LOCKLPM5;

    TA0CCTL0 | = CCIE; // TACCR0 interrupt enabled
    TA0CCR0 = 50000;
    TA0CTL | = TASSEL__SMCLK | MC__CONTINOUS; // SMCLK, continuous mode

__bis_SR_register (LPM0_bits | GIE); // Enter LPM3 w / interrupts
__no_operation (); // For debugger
}

// Timer A0 interrupt service routine
#if defined (__ TI_COMPILER_VERSION__) || defined (__ IAR_SYSTEMS_ICC__)
#pragma vector = TIMER0_A0_VECTOR
__interrupt void Timer_A (void)
#elif defined (__ GNUC__)
void __attribute__ ((interrupt (TIMER0_A0_VECTOR))) Timer_A (void)
#else
#error Compiler not supported!
#endif
{
P1OUT ^ = BIT0;
TA0CCR0 + = 50000; // Add Offset to TACCR0
}

over 3 years ago

0 Bruce McKenney47378 over 3 years ago

Guru 88460 points

On inspection (I don't have one of these) this looks straightforward. Are you fairly certain you've set the correct MCU ("Build Settings->CCS General->Variant")? Also, did you get any warnings when you built it?

0 Bruce McKenney47378 over 3 years ago in reply to Bruce McKenney47378

Guru 88460 points

Also: Have you run any other Examples on your board? Some of the Examples leave the RTC running; the debugger Reset doesn't stop the RTC, so the RTCIFG interrupt pops up after you've loaded a new program. (I've encountered this.)

If this is what is happening, power-cycling the board should make it stop. Alternatively, add "RTCCTL=0;" as the first line of the program.

0 YANG DOOYONG over 3 years ago in reply to Bruce McKenney47378

Prodigy 20 points

It works well.

It is presumed that RTC was running in the example program previously executed.

Thank you so much as a beginner to MSP.

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CCS/MSP430FR2033: Timer interrupt causes isr_trap.asm to run while application hangs