Posted on September 30, 2015 at 14:34 In my project based on stm32F107 i use four pins (PINE 12-15) to catch rising level on them.
My problem: two pins always produce external interrupts but there are no rising level on them and other two pins never respond to rising level.
My question: i'm looking for some debug ways and may be advices. May be reading some registers in the interrupt routine will help to solve my problem
Here is my code:
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE, ENABLE);
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_12;
GPIO_Init(GPIOE, &GPIO_InitStruct);
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_13;
GPIO_Init(GPIOE, &GPIO_InitStruct);
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_14;
GPIO_Init(GPIOE, &GPIO_InitStruct);
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_15;
GPIO_Init(GPIOE, &GPIO_InitStruct);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
// KeyI_0
GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_Pin_12);
EXTI_InitStructure.EXTI_Line = EXTI_Line12;
EXTI_Init(&EXTI_InitStructure);
// KeyI_1
GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_Pin_13);
EXTI_InitStructure.EXTI_Line = EXTI_Line13;
EXTI_Init(&EXTI_InitStructure);
// KeyI_2
GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_Pin_14);
EXTI_InitStructure.EXTI_Line = EXTI_Line14;
EXTI_Init(&EXTI_InitStructure);
// KeyI_3
GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_Pin_15);
EXTI_InitStructure.EXTI_Line = EXTI_Line15;
EXTI_Init(&EXTI_InitStructure);
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
NVIC_Init(&NVIC_InitStructure);
void
EXTI15_10_IRQHandler(
void
)
{
printf(
''exti\n''
);
if
(EXTI_GetFlagStatus(EXTI_Line12) != RESET) {
EXTI_ClearITPendingBit(EXTI_Line12);
printf(
''key1\n''
);
//keyboard_StringStart(0);
}
else
if
(EXTI_GetFlagStatus(EXTI_Line13) != RESET) {
EXTI_ClearITPendingBit(EXTI_Line13);
printf(
''key2\n''
);
//keyboard_StringStart(2);
}
else
if
(EXTI_GetFlagStatus(EXTI_Line14) != RESET) {
EXTI_ClearITPendingBit(EXTI_Line14);
printf(
''key3\n''
);
//keyboard_StringStart(3);
}
else
if
(EXTI_GetFlagStatus(EXTI_Line15) != RESET) {
EXTI_ClearITPendingBit(EXTI_Line15);
printf(
''key4\n''
);
//keyboard_StringStart(1);
}
}
#exti #stm32f107
