[参考译文] CC2340R5：POWER_SHUTDOWN API 失败

尊敬的 Vaibhav：

根据 之前的经验 、我可以验证当某些关断 GPIO 处于活动或挂起状态时、电源 TI 驱动器是否可以阻止关断模式。  这是为了防止在关断期间出现意外的 I/O 状态并从关断模式恢复。  下面是 simplelink_lowpower_f3_SDK_9_11_00_18\source\ti\drivers\power\PowerCC23X0.c 提供的 Power_shutdown ：

/*
 *  ======== Power_shutdown ========
 */
int_fast16_t Power_shutdown(uint_fast16_t shutdownState, uint_fast32_t shutdownTime)
{
    int_fast16_t notifyStatus;
    uintptr_t hwiKey;
    uint8_t i;
    bool ioPending = false;

    hwiKey = HwiP_disable();

    /* Check if there is a constraint to prohibit shutdown */
    if ((Power_getConstraintMask() & (1U << PowerLPF3_DISALLOW_SHUTDOWN)) != 0U)
    {
        HwiP_restore(hwiKey);
        return Power_ECHANGE_NOT_ALLOWED;
    }

    /* Check whether we were transitioning to another power state */
    if (powerState != Power_ACTIVE)
    {
        HwiP_restore(hwiKey);
        return Power_EBUSY;
    }

    /* Set new transition state to entering shutdown */
    powerState = Power_ENTERING_SHUTDOWN;

    /* Signal all clients registered for pre-shutdown notification */
    notifyStatus = PowerCC23X0_notify(PowerLPF3_ENTERING_SHUTDOWN);

    for (i = GPIO_pinLowerBound; i <= GPIO_pinUpperBound; i++)
    {
        /* Read WUCFGSD field once and check both values.
         * Use IOC3 since CC2340R2 does not have IOC0, IOC1, or IOC2.
         */
        uint32_t ioShutdownConfig = HWREG(IOC_ADDR(i)) & IOC_IOC3_WUCFGSD_M;

        if (((ioShutdownConfig == IOC_IOC3_WUCFGSD_WAKE_HIGH) || (ioShutdownConfig == IOC_IOC3_WUCFGSD_WAKE_LOW)) &&
            (GPIOGetEventDio(i) != 0U))
        {
            ioPending = true;
        }
    }

    /* If no IO event is pending on a shutdown wakeup IO, go to shutdown */
    if (ioPending == false && notifyStatus == Power_SOK)
    {
        HWREG(PMCTL_BASE + PMCTL_O_SHTDWN) = PMCTL_SHTDWN_KEY_VALID;
    }

    /* If shutdown succeeded, should never get here */

    powerState = Power_ACTIVE;

    HwiP_restore(hwiKey);

    /* If we get here, failed to shutdown, return error code */
    return Power_EFAIL;
}

我建议为所有 GPIO 提供服务并确保它们在进入 SHUTDOWN 模式之前处于非活动状态。  您可以使用定期计时器持续检查并尝试在程序已开始时进入 SHUTDOWN 模式。

此致、
Ryan