AON

HAL AON提供抽象的軟件接口操作硬件AON(Always On)模塊，用于控制芯片各個(gè)子系統(tǒng)的低功耗模式，芯片分為HPSYS和LPSYS兩個(gè)子系統(tǒng)(電源域)， 分別對(duì)應(yīng)HPAON(hwp_hpsys_aon)和LPAON(hwp_lpsys_aon)，兩個(gè)電源域的控制方法類似，支持的特性有:

• PIN、RTC、LPTIM、MAILBOX和手動(dòng)喚醒，LPSYS還支持LPCOMP和BLE喚醒， PIN喚醒可以是電平觸發(fā)也可以是邊沿觸發(fā)，手動(dòng)喚醒指由另外一個(gè)核操作特定寄存器喚醒指定的核, MAILBOX喚醒指可以通過觸發(fā)mailbox中斷來喚醒對(duì)應(yīng)的核，比如LPSYS可以配置 L2H_MAILBOX 觸發(fā)給HPSYS的MAILBOX中斷，若HPSYS使能了MAILBOX喚醒，就能被該中斷自動(dòng)喚醒
• HPSYS支持4個(gè)喚醒PIN，LPSYS支持6個(gè)喚醒PIN，他們都與固定的GPIO管腳綁定
• 支持LIGHT/DEEP/STANDBY三種低功耗模式，其中LIGHT和DEEP模式數(shù)字模塊不會(huì)掉電，所有寄存器和SRAM都會(huì)保留，STANDBY模式數(shù)字模塊會(huì)掉電，所有寄存器都會(huì)丟失，SRAM可以有選擇的保留

Note

由于PIN的邊沿檢測(cè)存在延遲，如果被其它喚醒源喚醒時(shí)剛好有喚醒PIN的電平變化，就有可能在AON中斷時(shí)看到WSR寄存器中的PIN喚醒標(biāo)志還是0，過了一會(huì)兒才變?yōu)?，又因?yàn)閷?duì)應(yīng)的GPIO邊沿檢測(cè)這時(shí)還沒準(zhǔn)備好， 就會(huì)導(dǎo)致WSR寄存器的PIN喚醒狀態(tài)沒有被清掉而一直不睡眠并且會(huì)丟失一次邊沿檢測(cè)的GPIO中斷，如果沒有使用SDK里drv_common.c實(shí)現(xiàn)的SysTick_Handler作為SysTick的中斷服務(wù)程序， 建議在自定義的SysTick中斷服務(wù)程序中添加如下代碼，當(dāng)發(fā)現(xiàn)邊沿觸發(fā)的喚醒PIN標(biāo)志為1時(shí)，手動(dòng)觸發(fā)一次GPIO中斷回調(diào)函數(shù)。

    /* Trigger GPIO callback manually as GPIO edge detection interrupt may get lost
       and WSR.PIN status is not cleared */
#ifdef SOC_BF0_HCPU
    status = HAL_HPAON_GET_WSR() & HPSYS_AON_WSR_PIN_ALL;
    pin_wsr = status >> HPSYS_AON_WSR_PIN0_Pos;
    HAL_HPAON_CLEAR_WSR(status);
    wake_pin_num = HPSYS_AON_WSR_PIN_NUM;
#else
    status = HAL_LPAON_GET_WSR() & LPSYS_AON_WSR_PIN_ALL;
    pin_wsr = status >> LPSYS_AON_WSR_PIN0_Pos;
    HAL_LPAON_CLEAR_WSR(status);
    wake_pin_num = LPSYS_AON_WSR_PIN_NUM;
#endif
 
    for (i = 0; (i < wake_pin_num) && pin_wsr; i++)
    {
        if (pin_wsr & 1)
        {
 
            hal_status = HAL_AON_GetWakePinMode(i, &pin_mode);
            if ((HAL_OK == hal_status) && (pin_mode != AON_PIN_MODE_HIGH)
                    && (pin_mode != AON_PIN_MODE_LOW))
            {
                gpio = HAL_AON_QueryWakeupGpioPin(i, &pin);
                RT_ASSERT(gpio);
                HAL_GPIO_EXTI_Callback(gpio, pin);
            }
        }
        pin_wsr >>= 1;
    }

喚醒PIN與GPIO管腳映射關(guān)系

Z0

HPSYS

Wakeup PIN	GPIO
PIN0	GPIO_B30
PIN1	GPIO_B31
PIN2	GPIO_B32
PIN3	GPIO_B33
PIN4	GPIO_B34
PIN5	GPIO_B35

LPSYS

Wakeup PIN	GPIO
PIN0	GPIO_B30
PIN1	GPIO_B31
PIN2	GPIO_B32
PIN3	GPIO_B33
PIN4	GPIO_B34
PIN5	GPIO_B35

A0

HPSYS

Wakeup PIN	GPIO
PIN0	GPIO_A77
PIN1	GPIO_A78
PIN2	GPIO_A79
PIN3	GPIO_A80

LPSYS

Wakeup PIN	GPIO
PIN0	GPIO_B43
PIN1	GPIO_B44
PIN2	GPIO_B45
PIN3	GPIO_B46
PIN4	GPIO_B47
PIN5	GPIO_B48

詳細(xì)的API說明參考 AON.

使用HAL HPAON

配置睡眠

void example(void)
{
    /* Enable LPTIM1 as wakeup source */
    HAL_HPAON_EnableWakeupSrc(HPAON_WAKEUP_SRC_LPTIM1, AON_PIN_MODE_HIGH);
    /* Enable MAILBOX interrupt triggered by LPSYS as wakeup source */
    HAL_HPAON_EnableWakeupSrc(HPAON_WAKEUP_SRC_LP2HP_IRQ, AON_PIN_MODE_HIGH);
    /* Enable manual wakeup triggered by LPSYS */
    HAL_HPAON_EnableWakeupSrc(HPAON_WAKEUP_SRC_LP2HP_REQ, AON_PIN_MODE_HIGH);
    /* Enable PIN0 low level wakeup  */
    HAL_HPAON_EnableWakeupSrc(HPAON_WAKEUP_SRC_PIN0, AON_PIN_MODE_LOW);
 
    ...
    
    /* Configure HPSYS enter LIGHT mode */
    HAL_HPAON_EnterLightSleep(0);
}

查詢喚醒PIN和對(duì)應(yīng)的GPIO管腳

void example(void)
{
    int8_t wakeup_pin;
    uint16_t *gpio_pin;
    GPIO_TypeDef *gpio;
    
    /* Query which wakeup pin is mapping to GPIO_A80, 
       if found return value >=0, otherwise, return -1 */
    wakeup_pin = HAL_HPAON_QueryWakeupPin(hwp_gpio1, 80);
 
    /* Query which GPIO PIN is mapping to wakeup pin0, 
       if found, return GPIO instance and pin id, otherwise return NULL */
    gpio = HAL_HPAON_QueryWakeupGpioPin(0, &pin);
}

使用HAL LPAON

配置睡眠

void example(void)
{
    /* Enable LPTIM2 as wakeup source */
    HAL_LPAON_EnableWakeupSrc(LPAON_WAKEUP_SRC_LPTIM2, AON_PIN_MODE_HIGH);
    /* Enable MAILBOX interrupt triggered by HPSYS as wakeup source */
    HAL_LPAON_EnableWakeupSrc(LPAON_WAKEUP_SRC_HP2LP_IRQ, AON_PIN_MODE_HIGH);
    /* Enable manual wakeup triggered by HPSYS */
    HAL_LPAON_EnableWakeupSrc(LPAON_WAKEUP_SRC_HP2LP_REQ, AON_PIN_MODE_HIGH);
    /* Enable PIN0 low level wakeup  */
    HAL_LPAON_EnableWakeupSrc(LPAON_WAKEUP_SRC_PIN0, AON_PIN_MODE_LOW);
 
    ...
    
    /* Configure LPSYS enter LIGHT mode */
    HAL_LPAON_EnterLightSleep(0);
}

查詢喚醒PIN和對(duì)應(yīng)的GPIO管腳

void example(void)
{
    int8_t wakeup_pin;
    uint16_t *gpio_pin;
    GPIO_TypeDef *gpio;
    
    /* Query which wakeup pin is mapping to GPIO_B43, 
       if found return value >=0, otherwise, return -1 */
    wakeup_pin = HAL_LPAON_QueryWakeupPin(hwp_gpio2, 43);
 
    /* Query which GPIO PIN is mapping to wakeup pin0, 
       if found, return GPIO instance and pin id, otherwise return NULL */
    gpio = HAL_HPAON_QueryWakeupGpioPin(0, &pin);
}