PMU

HAL PMU提供抽象的軟件接口操作硬件PMU(Power Management Unit)模塊，提供的功能有:

• 設(shè)置芯片的供電參數(shù)
• 設(shè)置低功耗時鐘參數(shù)，
• 配置芯片進入關(guān)機模式并設(shè)置喚醒源, 在關(guān)機模式下芯片可被PIN和RTC喚醒, 喚醒PIN與GPIO管腳的映射關(guān)系與LPSYS睡眠模式的喚醒PIN相同，參見AON
• SF32LB52X支持充電，相關(guān)接口為 HAL_PMU_ChgInit 等

詳細(xì)的API說明參考 PMU.

Note

• HAL_PMU_CheckBootMode 需要在每次啟動時執(zhí)行以獲取開機模式并清除相應(yīng)狀態(tài)，如果關(guān)機狀態(tài)醒來不清PMU的狀態(tài)， 就無法調(diào)用 HAL_PMU_EnterHibernate 再次關(guān)機
• 執(zhí)行 HAL_PMU_EnterHibernate 后芯片并不會馬上關(guān)機, 最長會延遲一個LP Clock周期才會關(guān)機, 這期間CPU還能繼續(xù)執(zhí)行指令和響應(yīng)中斷， 為避免中斷觸發(fā)后誤執(zhí)行一些操作, 建議在調(diào)用 HAL_PMU_EnterHibernate 前關(guān)閉中斷, HAL_PMU_EnterHibernate 本身會是一個死循環(huán), 永遠(yuǎn)不會退出

使用HAL PMU

使能RTC和PIN喚醒后關(guān)機

void shutdown(void)
{
    /* Enable PIN0 low level wakeup  */
    HAL_PMU_EnablePinWakeup(0, 1);
    /* Enble RTC wakeup */
    HAL_PMU_EnableRtcWakeup();
    /* Disable Interrupt */
    
    /* Shutdown, can be wakeup by PIN0 and RTC */
    HAL_PMU_EnterHibernate();
    
}
 
/* Use HAL_PMU_CheckBootMode in initializtion stage to check whether it's cold boot or wakeup from shutdown mode */
void init(void)
{
    PMU_BootModeTypeDef boot_mode;
    uint32_t wakeup_src;
    /* check boot mode and clear PMU shutdown state if wakeup from shutdown mode
     */
    HAL_PMU_CheckBootMode(&boot_mode, &wakeup_src);
}

配置充電

static PMU_ChgHandleTypeDef pmu_chg_handle;
 
static void pmu_chg_callback(PMU_ChgHandleTypeDef *handle, uint32_t status)
{
    if (status & (1 << PMU_CHG_IRQ_VBUS_RDY))
    {
        printf("vbus: %d", HAL_PMU_ChgReadStatus(handle, PMU_CHG_IRQ_VBUS_RDY));
    }
 
    if (status & (1 << PMU_CHG_IRQ_EOC))
    {
        printf("eoc: %d", HAL_PMU_ChgReadStatus(handle, PMU_CHG_IRQ_EOC));
    }
 
    if (status & (1 << PMU_CHG_IRQ_VBAT_HIGH))
    {
        printf("vbat high: %d", HAL_PMU_ChgReadStatus(handle, PMU_CHG_IRQ_VBAT_HIGH));
    }
}
 
void config_charger(void)
{
    PMU_ChgCalParamTypeDef cal_param;
    uint32_t current;
    uint32_t volt;
    
    //config calibration data for charger, calibration is saved in EFUSE
    //cal_param.cc_mn = xxx;
    //cal_param.cc_mp = xxx;
    //cal_param.bg = xxx;
    //cal_param.cv_vctrl = xxx;
    //cal_param.rep_vctrl = xxx;
    status = HAL_PMU_ChgInit(&pmu_chg_handle, &cal_param);
    
    // config CC current
    current = 300; //300mA
    current = HAL_PMU_ChgConfigCcCurrent(&pmu_chg_handle, current);
    
    // config target voltage
    volt = 4300;  //4300mV
    volt = HAL_PMU_ChgConfigTargetVolt(&pmu_chg_handle, volt);
 
    // enable IRQ and register callback
    HAL_PMU_ChgRegisterCallback(&pmu_chg_handle, pmu_chg_callback);
    status = HAL_PMU_ChgConfigIRQ(&pmu_chg_handle, PMU_CHG_IRQ_VBUS_RDY, PMU_CHG_IRQ_TRIG_MODE_DOUBLE_EDGE);
    RT_ASSERT(HAL_OK == status);
    status = HAL_PMU_ChgConfigIRQ(&pmu_chg_handle, PMU_CHG_IRQ_VBAT_HIGH, PMU_CHG_IRQ_TRIG_MODE_POS_EDGE);
    RT_ASSERT(HAL_OK == status);
    status = HAL_PMU_ChgConfigIRQ(&pmu_chg_handle, PMU_CHG_IRQ_EOC, PMU_CHG_IRQ_TRIG_MODE_POS_EDGE);
    RT_ASSERT(HAL_OK == status);
 
    HAL_NVIC_SetPriority(PMUC_IRQn, 5, 0);
    HAL_NVIC_EnableIRQ(PMUC_IRQn);    
}