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CCS/MSP432P401R: MSP432P401R Launchpad: Timer32 interrupt missed or faultISR

Sean Campbell
Prodigy 25 points

Part Number: MSP432P401R

Tool/software: Code Composer Studio

Hello,

I'm attempting to re-use some code I wrote about a year ago for the MSP432.  Unfortunately, the wrapper code I've written for dealing with the clocking no longer seems to work.

In the simple delay function, entering the loop seems to trigger the faultISR.  If I change the mapped function to MAP_PCM_gotoLPM0InterruptSafe to MAP_PCM_gotoLPM0 then the below ISR is triggered but interrupts are missed when the parameter for the delay is too low.

I've copied the relevant material below; can anyone offer any assistance?

Thanks very much in advance,

Séan

#include "clocking.h"
#include "driverlib.h"

static volatile bool waitT32 = true;

void clocking_setup(void){
	// Operate MCLK at 24MHz
	MAP_CS_initClockSignal(CS_MCLK, CS_MODOSC_SELECT, CS_CLOCK_DIVIDER_1);
	// Operate SMCLK at 12MHz
	MAP_CS_initClockSignal(CS_SMCLK, CS_MODOSC_SELECT, CS_CLOCK_DIVIDER_2);
	
	timer32_setup();
}

void timer32_setup(void){
	MAP_Timer32_initModule(TIMER32_0_BASE, TIMER32_PRESCALER_16, TIMER32_32BIT,
			TIMER32_PERIODIC_MODE);
	MAP_Timer32_enableInterrupt(TIMER32_0_BASE);
	MAP_Timer32_clearInterruptFlag((uint32_t)TIMER32_0_BASE);

	MAP_Interrupt_enableInterrupt(INT_T32_INT1);
}

void timer32_delay(uint32_t msDelay){
	uint64_t sDelay = 1500*msDelay;
	if(sDelay > UINT32_MAX)	// Prevent overflow; best effort timer
		sDelay = UINT32_MAX;

	MAP_Timer32_setCount((uint32_t)TIMER32_0_BASE, (uint32_t)sDelay);
	waitT32 = true;

	MAP_Timer32_startTimer(TIMER32_0_BASE, true);
	while(waitT32){	// Ignore other interrupts on the processor end
		MAP_PCM_gotoLPM0InterruptSafe();
	}
}

void timer32_isr(void){
    MAP_Timer32_clearInterruptFlag(TIMER32_0_BASE);
    waitT32 = false;
}

EDIT: Using Code Composer  v6.2.0.00050 and a Linux Debian distro, if either fact is relevant. 

  • 0
    TI__Guru 57341 points
    Hey Sean,
    A number of changes have been made to the MSP432. Revision C silicon as well as updates to the IDE. Have you updated CCS for the latest silicon? are you using the latest silicon?

    Thanks,
    Chris
  • 0 in reply to Chris Sterzik
    Prodigy 25 points

    Hi Chris,

    Thanks for the reply.

    I have updated CCS but the silicon will likely be an older revision, Revision B I believe.  In fact, remembering off-hand, the IDE does offer a warning about the usage of 'pre-production silicon'.

    If this is indeed the source of the problem, is it possible for me to remove certain updates in order to work with the silicon I currently hold?  Or is there an alternative solution?

    Thanks,

    Séan

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