MSPM0L1306: How to test NRST triggered BOOTRST (<1s hold) ?

Hi Sourabh,

Ok, it turns out it is quite simple as you can see from the example below.  One driverlib function returns the reset cause.  I set a breakpoint in code (__BKPT(0)), but for your application you will probably execute various code based on the return value.

int main(void)
{
    uint32_t cause;
    cause = DL_SYSCTL_getResetCause();
    __BKPT(0);

      SYSCFG_DL_init();

     while (1) {
       __WFI();
    }
}

#if 0
//from hw_sysctl_mspm0l11xx_l13xx.h
/* SYSCTL_RSTCAUSE Bits */
/* SYSCTL_RSTCAUSE[ID] Bits */
#define SYSCTL_RSTCAUSE_ID_OFS                   (0)                             /* !< ID Offset */
#define SYSCTL_RSTCAUSE_ID_MASK                  ((uint32_t)0x0000001FU)         /* !< ID is a read-to-clear field which
                                                                                    indicates the lowest level reset
                                                                                    cause since the last read. */
#define SYSCTL_RSTCAUSE_ID_NORST                 ((uint32_t)0x00000000U)         /* !< No reset since last read */
#define SYSCTL_RSTCAUSE_ID_PORHWFAIL             ((uint32_t)0x00000001U)         /* !< POR- violation, SHUTDNSTOREx or PMU
                                                                                    trim parity fault */
#define SYSCTL_RSTCAUSE_ID_POREXNRST             ((uint32_t)0x00000002U)         /* !< NRST triggered POR (>1s hold) */
#define SYSCTL_RSTCAUSE_ID_PORSW                 ((uint32_t)0x00000003U)         /* !< Software triggered POR */
#define SYSCTL_RSTCAUSE_ID_BORSUPPLY             ((uint32_t)0x00000004U)         /* !< BOR0- violation */
#define SYSCTL_RSTCAUSE_ID_BORWAKESHUTDN         ((uint32_t)0x00000005U)         /* !< SHUTDOWN mode exit */
#define SYSCTL_RSTCAUSE_ID_BOOTNONPMUPARITY      ((uint32_t)0x00000008U)         /* !< Non-PMU trim parity fault */
#define SYSCTL_RSTCAUSE_ID_BOOTCLKFAIL           ((uint32_t)0x00000009U)         /* !< Fatal clock failure */
#define SYSCTL_RSTCAUSE_ID_BOOTEXNRST            ((uint32_t)0x0000000CU)         /* !< NRST triggered BOOTRST (<1s
                                                                                    hold) */
#define SYSCTL_RSTCAUSE_ID_BOOTSW                ((uint32_t)0x0000000DU)         /* !< Software triggered BOOTRST */
#define SYSCTL_RSTCAUSE_ID_SYSWWDT0              ((uint32_t)0x0000000EU)         /* !< WWDT0 violation */
#define SYSCTL_RSTCAUSE_ID_SYSBSLEXIT            ((uint32_t)0x00000010U)         /* !< BSL exit */
#define SYSCTL_RSTCAUSE_ID_SYSBSLENTRY           ((uint32_t)0x00000011U)         /* !< BSL entry */
#define SYSCTL_RSTCAUSE_ID_SYSWWDT1              ((uint32_t)0x00000013U)         /* !< WWDT1 violation */
#define SYSCTL_RSTCAUSE_ID_SYSFLASHECC           ((uint32_t)0x00000014U)         /* !< Flash uncorrectable ECC error */
#define SYSCTL_RSTCAUSE_ID_SYSCPULOCK            ((uint32_t)0x00000015U)         /* !< CPULOCK violation */
#define SYSCTL_RSTCAUSE_ID_SYSDBG                ((uint32_t)0x0000001AU)         /* !< Debug triggered SYSRST */
#define SYSCTL_RSTCAUSE_ID_SYSSW                 ((uint32_t)0x0000001BU)         /* !< Software triggered SYSRST */
#define SYSCTL_RSTCAUSE_ID_CPUDBG                ((uint32_t)0x0000001CU)         /* !< Debug triggered CPURST */
#define SYSCTL_RSTCAUSE_ID_CPUSW                 ((uint32_t)0x0000001DU)         /* !< Software triggered CPURST */

// For reference, here is driverlib function to see how it is implemented
/**
 *  @brief  Return byte that is stored in RSTCAUSE.
 *
 *  @return The cause of reset. One of @ref DL_SYSCTL_RESET_CAUSE
 */

__STATIC_INLINE DL_SYSCTL_RESET_CAUSE DL_SYSCTL_getResetCause(void)
{
    uint32_t resetCause = SYSCTL->SOCLOCK.RSTCAUSE & SYSCTL_RSTCAUSE_ID_MASK;

    return (DL_SYSCTL_RESET_CAUSE)(resetCause);
}
#endif