Posted on May 17, 2011 at 13:22Hello.
In my application I would like to use stop mode, which will be exited by any edge (rising or falling) on GPIOA:3. However, I dont know what to do to exit from the stop mode. Here is all important lines (sequentially as CPU executes them) I use to initialize event-driven stop mode:
Code:
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
EXTI_InitTypeDef EXTI_InitStructure;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Event;
EXTI_InitStructure.EXTI_Line = EXTI_Line3;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
GPIO_Init(GPIOA, &GPIO_InitStructure);
PWR_EnterSTOPMode(PWR_Regulator_ON, PWR_STOPEntry_WFE);
RCC_HSEConfig(RCC_HSE_ON);
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS) {
RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
while(RCC_GetSYSCLKSource() != 0x08);
}
Can you help me, please? I've read from Hitex document, that event driven low-power mode behaves similarily than interrupt driven, without setting interrupt and interrupt handler (so after wake-up, PC is loaded with the next instruction, not interrupt vector value).
