此示例需要两种防篡改 I/O 配置。将防篡改 I/O 0 配置为输入以用作篡改事件触发器。时间戳事件输出可捕获事件发生情况，RTC 则记录捕获事件的时间。接下来，将防篡改 I/O 1 配置为输出以切换检测信号模式的 LED。在防篡改 I/O 触发上升沿时，TSCTL 寄存器将捕获发生的第一个或最后一个事件。配置的 LED 会在 VDD 断电时一直闪烁，表明检测信号发生器仍在运行并由 VBAT 供电。

#include "ti_msp_dl_config.h"

volatile bool gCheckTSEVT = false;
volatile uint32_t counter = 0;
volatile uint8_t gBlink;

int main(void)
{
    /* Initialization */
    SYSCFG_DL_init();

    /* Enable the RTC interrupt at NVIC */
    NVIC_EnableIRQ(RTC_A_INT_IRQn);

    /* Start RTC clock */
    DL_RTC_A_enableClockControl(RTC_A);

    while (1) {
        __WFI();

        /* Wait in a while() loop until the time stamp interrupt triggers - Trigger a tamper event externally */
        while (gCheckTSEVT == false)
            ;

        /* Blink LED a number of times equal to amount of time stamp events detected */
        if (DL_RTC_A_getTimeStampEventCause(
                RTC_A, DL_RTC_A_TIME_STAMP_EVENT_CAUSE_TIO_0) ==
            DL_RTC_A_TIME_STAMP_EVENT_CAUSE_TIO_0) {
            for (gBlink = 0; gBlink < (2 * counter); gBlink++) {
                DL_GPIO_togglePins(GPIO_LEDS_LED_2_PORT, GPIO_LEDS_LED_2_PIN);
                delay_cycles(16000000);
            }
        }
    }
}

void LFSS_IRQHandler()
{
    switch (DL_RTC_A_getPendingInterrupt(RTC_A)) {
        case DL_RTC_A_IIDX_TSEVT:
            counter++;
            gCheckTSEVT = true;
        default:
            break;
    }
}