如何确认是什么中断唤醒的芯片

[newcastle]

XR806休眠时频繁被中断唤醒，但没办法定位到是什么中断导致的

被唤醒时，有以下log:

[2022-10-28-18:38:33.456]$ PMA: appos enter mode: standby
[2022-10-28-18:38:33.457]suspend devices took 1 ms
[2022-10-28-18:38:33.458]nvic[1]:8, mask:fff en:0
[2022-10-28-18:38:33.458]wakeup devices pending
[2022-10-28-18:38:33.459]resume devices took 2 ms
[2022-10-28-18:38:33.618]suspend devices took 3 ms

[livpo]

@newcastle
该部分对应的代码是：src/pm/pm.c ： pm_check_wakeup_irqs

/* Check if there are any interrupts pending */
	addr = (unsigned int *)NVIC->ISPR;
	for (i = 0; i < DIV_ROUND_UP(NVIC_PERIPH_IRQ_NUM, 32); i++) {
		val = addr[i];
		irq[i] = val & nvic_int_mask[i];
		if (irq[i]) {
			PM_LOGD("nvic[%d]:%x, mask:%x en:%x\n", i, val,
			        nvic_int_mask[i], NVIC->ISER[i]);
			ret |= PM_WAKEUP_SRC_DEVICES;
		}
	}

NVIC->ISPR寄存器也就是中断挂起控制寄存器组，代表有中断产生，每一位对应一个中断，可以看到唤醒中断是nvic[1]，8也就是0b1000，也就是对应（nvic[0]）31 + 4 = 35号中断。

XR806对应的芯片中断序号在include/driver/chip/chip.h里面定义。

/*!< Interrupt Number Definition */
typedef enum {
	/* Cortex-M4/3 Processor Exceptions Numbers*/
	NonMaskableInt_IRQn     = -14,    /*!< 2 Non Maskable Interrupt */
	MemoryManagement_IRQn   = -12,    /*!< 4 Cortex-M3 Memory Management Interrupt */
	BusFault_IRQn           = -11,    /*!< 5 Cortex-M3 Bus Fault Interrupt */
	UsageFault_IRQn         = -10,    /*!< 6 Cortex-M3 Usage Fault Interrupt */
#if defined(CONFIG_CPU_CM33F)
	SecureFault_IRQn        = -9,     /*!< 7 Cortex-M33 Secure Fault Interrupt */
#endif
	SVCall_IRQn             = -5,     /*!< 11 Cortex-M3 SV Call Interrupt */
	DebugMonitor_IRQn       = -4,     /*!< 12 Cortex-M3 Debug Monitor Interrupt */
	PendSV_IRQn             = -2,     /*!< 14 Cortex-M3 Pend SV Interrupt */
	SysTick_IRQn            = -1,     /*!< 15 Cortex-M3 System Tick Interrupt */

	/* Specific Interrupt Numbers */
	DMA_IRQn                = 0,
	GPIOA_IRQn              = 1,
#if (CONFIG_CHIP_ARCH_VER == 2)
	SDC0_IRQn               = 2,
#endif
	UART0_IRQn              = 4,
	UART1_IRQn              = 5,
	SPI0_IRQn               = 6,
#if (CONFIG_CHIP_ARCH_VER == 2)
	SPI1_IRQn               = 7,
#endif
	I2C0_IRQn               = 8,
	I2C1_IRQn               = 9,
	WDG_IRQn                = 10,
	TIMER0_IRQn             = 11,
	TIMER1_IRQn             = 12,
	RTC_SEC_ALARM_IRQn      = 13,
	RTC_WDAY_ALARM_IRQn     = 14,
#if (CONFIG_CHIP_ARCH_VER == 2)
	CSI_JPEG_IRQn           = 15,
#endif
	I2S_IRQn                = 16,
	PWM_ECT_IRQn            = 17,
	CE_IRQn                 = 18,
	GPADC_IRQn              = 19,
	GPIOB_IRQn              = 20,
	IRRX_IRQn               = 22,
	IRTX_IRQn               = 23,
	A_WAKEUP_IRQn           = 25,
	FLASHC_IRQn             = 26,
	UART2_IRQn              = 27,
#if (CONFIG_CHIP_ARCH_VER == 2)
	SDC1_IRQn               = 28,
#endif
	WIFIC_IRQn              = 29,
	CODEC_DAC_IRQn          = 30,
	CODEC_ADC_IRQn          = 31,
	AVS_IRQn                = 32,       /* AVS psensor */
#if (CONFIG_CHIP_ARCH_VER == 2)
	GPIOC_IRQn              = 33,
	PSRAMC_IRQn             = 34,
#endif
#if (CONFIG_CHIP_ARCH_VER == 3)
	BLE_LL_IRQn             = 35,
	BTCOEX_IRQn             = 36,
	KEYSCAN_IRQn            = 37,
	SMCARD_IRQn             = 38,
	DMA_SEC_IRQn            = 39,
	CAPSEN_IRQn             = 40,
	LPUART0_IRQn            = 41,
	LPUART1_IRQn            = 42,
	TZASC_IRQn              = 43,
#endif
}  IRQn_Type;

可以看到是因为蓝牙中断唤醒的，在休眠关闭蓝牙前关闭广播可以解决。