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53 lines
1003 B
53 lines
1003 B
2 years ago
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## EXTI
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外部中断
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STM32F103ZET6 正点原子
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PA0 Wakeup KEY_UP 外接3.3 pulldown
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PE2 KEY2 外接3.3 pulldown
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PE3 KEY1 外接地 pullup
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PE3 KEY1
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PE4 KEY0
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#### exti.h .c
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```C
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void MX_EXTI_Init(void);
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void EXTI0_IRQHandler(void);
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void EXTI2_IRQHandler(void);
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void EXTI3_IRQHandler(void);
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void EXTI4_IRQHandler(void);
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// 主要为配置模式不同，中断 上升沿
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GPIO_InitStruct.Pin = KEY2_Pin|KEY1_Pin|KEY0_Pin;
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GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
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HAL_NVIC_SetPriority(EXTI0_IRQn, 0, 0);
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HAL_NVIC_EnableIRQ(EXTI0_IRQn);
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```
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```C
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void EXTI0_IRQHandler(void)
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{
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HAL_GPIO_EXTI_IRQHandler(KEY_UP_Pin);
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}
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```
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#### main.c
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调用 MX_EXTI_Init（） 初始化
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#### 回调
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void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin);
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void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){
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if(GPIO_Pin == KEY_UP_Pin){/* KEY */
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/* 翻转LED */
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DS0_Toggle();
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}
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}
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#### 加入makefile
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exti.c
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