本来是想利用外部中断来翻转IO的，结果复位后调试发现，自动进入中断了，参考的官方的例程代码- /**
- ******************************************************************************
- * [url=home.php?mod=space&uid=288409]@file[/url] EXTI/EXTI_demo/main.c
- * [url=home.php?mod=space&uid=187600]@author[/url] MCU SD
- * [url=home.php?mod=space&uid=895143]@version[/url] V1.0
- * [url=home.php?mod=space&uid=212281]@date[/url] 26-DEC-2014
- * [url=home.php?mod=space&uid=247401]@brief[/url] Main program body..
- ******************************************************************************
- */
- /* Includes ------------------------------------------------------------------*/
- #include "gd32f10x.h"
- /* Private variables ---------------------------------------------------------*/
- GPIO_InitPara GPIO_InitStructure;
- EXTI_InitPara EXTI_InitStructure;
- NVIC_InitPara NVIC_InitStructure;
- /* Private function prototypes -----------------------------------------------*/
- void EXTI0_Config(void);
- void EXTI14_Config(void);
- /* Private functions ---------------------------------------------------------*/
- /**
- * @brief Main program.
- * @param None
- * @retval None
- */
- int main(void)
- {
- /* Enable GPIOC clock */
- RCC_APB2PeriphClock_Enable(RCC_APB2PERIPH_GPIOC, ENABLE);
-
- /* Configure the LED2 and LED3 GPIO */
- GPIO_InitStructure.GPIO_Pin = GPIO_PIN_0 | GPIO_PIN_2;
- GPIO_InitStructure.GPIO_Mode = GPIO_MODE_OUT_PP;
- GPIO_InitStructure.GPIO_Speed = GPIO_SPEED_50MHZ;
- GPIO_Init(GPIOC, &GPIO_InitStructure);
-
- /* Turn on LED2 and LED3 */
- GPIO_SetBits(GPIOC, GPIO_PIN_0);
- GPIO_SetBits(GPIOC, GPIO_PIN_2);
-
- /* Configure the EXTI line0 and EXTI line14 */
- EXTI_DeInit(&EXTI_InitStructure);
- EXTI0_Config();
- EXTI14_Config();
-
- EXTI_SWINT_Enable(EXTI_LINE0);
-
- while(1)
- {
- }
- }
- /**
- * @brief Configure the EXTI line0.
- * @param None
- * @retval None
- */
- void EXTI0_Config(void)
- {
- /* Enable GPIOC and AFIO clock */
- RCC_APB2PeriphClock_Enable(RCC_APB2PERIPH_GPIOA |
- RCC_APB2PERIPH_AF, ENABLE);
- /* Configure PA0 pin */
- GPIO_InitStructure.GPIO_Pin = GPIO_PIN_0;
- GPIO_InitStructure.GPIO_Mode = GPIO_MODE_IN_FLOATING;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- /* Connect EXTI Line0 to PA0 pin */
- GPIO_EXTILineConfig(GPIO_PORT_SOURCE_GPIOA, GPIO_PINSOURCE0);
- /* Configure EXTI Line0 and its interrupt to the lowest priority*/
- EXTI_InitStructure.EXTI_LINE = EXTI_LINE0;
- EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
- EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
- EXTI_InitStructure.EXTI_LINEEnable = ENABLE;
- EXTI_Init(&EXTI_InitStructure);
-
- NVIC_InitStructure.NVIC_IRQ = EXTI0_IRQn;
- NVIC_InitStructure.NVIC_IRQPreemptPriority = 0x0F;
- NVIC_InitStructure.NVIC_IRQSubPriority = 0x0F;
- NVIC_InitStructure.NVIC_IRQEnable = ENABLE;
- NVIC_Init(&NVIC_InitStructure);
- }
- /**
- * @brief Configure the EXTI line14.
- * @param None
- * @retval None
- */
- void EXTI14_Config(void)
- {
- /* Enable GPIOB and AFIO clock */
- RCC_APB2PeriphClock_Enable(RCC_APB2PERIPH_GPIOB |
- RCC_APB2PERIPH_AF, ENABLE);
-
- /* Configure PB14 pin */
- GPIO_InitStructure.GPIO_Pin = GPIO_PIN_14;
- GPIO_InitStructure.GPIO_Mode = GPIO_MODE_IN_FLOATING;
- GPIO_Init(GPIOB, &GPIO_InitStructure);
- /* Connect EXTI Line14 to PB14 pin */
- GPIO_EXTILineConfig(GPIO_PORT_SOURCE_GPIOB, GPIO_PINSOURCE14);
- /* Configure EXTI Line14 and its interrupt to the lowest priority*/
- EXTI_InitStructure.EXTI_LINE = EXTI_LINE14;
- EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
- EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
- EXTI_InitStructure.EXTI_LINEEnable = ENABLE;
- EXTI_Init(&EXTI_InitStructure);
-
- NVIC_InitStructure.NVIC_IRQ = EXTI15_10_IRQn;
- NVIC_InitStructure.NVIC_IRQPreemptPriority = 0x0F;
- NVIC_InitStructure.NVIC_IRQSubPriority = 0x0F;
- NVIC_InitStructure.NVIC_IRQEnable = ENABLE;
- NVIC_Init(&NVIC_InitStructure);
- }
- /******************* (C) COPYRIGHT 2014 GIGADEVICE *****END OF FILE****/
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