国民技术N32L40X进入Stop2

1万 · 2025-3-22 22:09

1.首先配置唤醒MCU的外部中断

void Exti_Pin_Config(void)
{
EXTI_InitType EXTI_InitStructure;
NVIC_InitType NVIC_InitStructure;
GPIO_InitType GPIO_InitStructure;
GPIO_InitStruct(&GPIO_InitStructure);

RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_GPIOA | RCC_APB2_PERIPH_AFIO, ENABLE);
RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_GPIOB | RCC_APB2_PERIPH_AFIO, ENABLE);
RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_GPIOC | RCC_APB2_PERIPH_AFIO, ENABLE);

GPIO_InitStructure.Pin       = GPIO_PIN_0;
GPIO_InitStructure.GPIO_Pull  = GPIO_Pull_Up;
GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_Input;
GPIO_InitPeripheral(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.Pin       = GPIO_PIN_7;
GPIO_InitStructure.GPIO_Pull  = GPIO_Pull_Up;
GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_Input;
GPIO_InitPeripheral(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.Pin       = GPIO_PIN_8;
GPIO_InitStructure.GPIO_Pull  = GPIO_Pull_Up;
GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_Input;
GPIO_InitPeripheral(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.Pin       = GPIO_PIN_11;
GPIO_InitStructure.GPIO_Pull = GPIO_Pull_Up;
GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_Input;
GPIO_InitPeripheral(GPIOB, &GPIO_InitStructure);

GPIO_InitStructure.Pin       = GPIO_PIN_13;
GPIO_InitStructure.GPIO_Pull = GPIO_Pull_Up;
GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_Input;
GPIO_InitPeripheral(GPIOC, &GPIO_InitStructure);

GPIO_ConfigEXTILine(GPIOA_PORT_SOURCE, GPIO_PIN_SOURCE0);
GPIO_ConfigEXTILine(GPIOA_PORT_SOURCE, GPIO_PIN_SOURCE7);
GPIO_ConfigEXTILine(GPIOA_PORT_SOURCE, GPIO_PIN_SOURCE8);
GPIO_ConfigEXTILine(GPIOB_PORT_SOURCE, GPIO_PIN_SOURCE11);
GPIO_ConfigEXTILine(GPIOC_PORT_SOURCE, GPIO_PIN_SOURCE13);

EXTI_InitStructure.EXTI_Line = EXTI_LINE0 | EXTI_LINE7 | EXTI_LINE8 | EXTI_LINE11 | EXTI_LINE13;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_InitPeripheral(&EXTI_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel                = EXTI0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;
NVIC_InitStructure.NVIC_IRQChannelSubPriority       = 0x0D;
NVIC_InitStructure.NVIC_IRQChannelCmd             = ENABLE;
NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel                = EXTI9_5_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02;
NVIC_InitStructure.NVIC_IRQChannelSubPriority       = 0x0D;
NVIC_InitStructure.NVIC_IRQChannelCmd             = ENABLE;
NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel                = EXTI15_10_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x03;
NVIC_InitStructure.NVIC_IRQChannelSubPriority       = 0x0D;
NVIC_InitStructure.NVIC_IRQChannelCmd             = ENABLE;
NVIC_Init(&NVIC_InitStructure);

EXTI_ClrStatusFlag(EXTI_LINE0 | EXTI_LINE7 | EXTI_LINE8 | EXTI_LINE11 | EXTI_LINE13);
}

2.配置进入Stop2模式函数

void Stop2_Mode_Init(void)
{
Led_Rest_Low;
printf("Stop2_Mode_Init \r\n");
Exti_Pin_Config();

RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_PWR, ENABLE);
PWR_EnterSTOP2Mode(PWR_STOPENTRY_WFI,PWR_CTRL3_RAM1RET);

NVIC_SystemReset();
}
3.中断响应函数要记得写一下

void EXTI0_IRQHandler(void)
{
if (EXTI_GetITStatus(EXTI_LINE0) != RESET)
{
EXTI_ClrITPendBit(EXTI_LINE0);
//printf("EXTI_LINE0\r\n");
}
}

void EXTI9_5_IRQHandler(void)
{
if (EXTI_GetITStatus(EXTI_LINE7) != RESET)
{
EXTI_ClrITPendBit(EXTI_LINE7);
//printf("EXTI_LINE7\r\n");
}
else if (EXTI_GetITStatus(EXTI_LINE8) != RESET)
{
EXTI_ClrITPendBit(EXTI_LINE8);
//printf("EXTI_LINE8\r\n");
}
}

void EXTI15_10_IRQHandler(void)
{
if (EXTI_GetITStatus(EXTI_LINE11) != RESET)
{
EXTI_ClrITPendBit(EXTI_LINE11);
//printf("EXTI_LINE11\r\n");
}
else if (EXTI_GetITStatus(EXTI_LINE13) != RESET)
{
EXTI_ClrITPendBit(EXTI_LINE13);
//printf("EXTI_LINE13\r\n");
}
}

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原文链接：https://blog.csdn.net/dailin2012/article/details/130029193