中断之外部中断

  1 #include 'pbdata.h'
  2 #include 'led.h'
  3 #include 'key.h'
  4 #include 'misc.h'
  5 #include 'stm32f10x_exti.h'
  6 
  7 void RCC_Configration(void)
  8 {
  9      SystemInit();
 10      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
 11      RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);      //功能复用IO时钟
 12 }
 13 
 14 void GPIO_Configration(void)
 15 {
 16     GPIO_LED_Configration();
 17     GPIO_KEY_Configration();
 18 }
 19 
 20 /*
 21   *中断配置*
 22             */
 23 void EXTI_Configuration(void)
 24 {
 25     EXTI_InitTypeDef EXTI_InitStructure;
 26          
 27     EXTI_ClearITPendingBit(EXTI_Line0);     //清空中断线
 28     EXTI_ClearITPendingBit(EXTI_Line1);
 29     EXTI_ClearITPendingBit(EXTI_Line2);
 30     EXTI_ClearITPendingBit(EXTI_Line3);
 31     EXTI_ClearITPendingBit(EXTI_Line4);
 32     EXTI_ClearITPendingBit(EXTI_Line5);
 33     EXTI_ClearITPendingBit(EXTI_Line6);
 34     EXTI_ClearITPendingBit(EXTI_Line7);
 35 
 36     GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource0);//映射
 37     GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource1);
 38     GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource2);
 39     GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource3);
 40     GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource4);
 41     GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource5);
 42     GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource6);
 43     GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource7);
 44         
 45     EXTI_InitStructure.EXTI_Line=EXTI_Line0  EXTI_Line1  EXTI_Line2  EXTI_Line3  EXTI_Line4  EXTI_Line5  EXTI_Line6  EXTI_Line7;       //选择中断线
 46 
 47     EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt;           //设置模式
 48     EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Falling;       //设置触发方式
 49     EXTI_InitStructure.EXTI_LineCmd=ENABLE;                        //使能
 50 
 51     EXTI_Init(&EXTI_InitStructure);
 52 }
 53 
 54 void NVIC_Configuration0(void)         //优先级设置函数
 55 {
 56        NVIC_InitTypeDef NVIC_InitStructure; 
 57 
 58     NVIC_PriorityGroupConfig(NVIC_PriorityGroup_3); 
 59                                                      
 60     NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;       //选择IRQ通道
 61     NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;  //抢占优先级设置
 62     NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;            //次优先级设置
 63     NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; 
 64     NVIC_Init(&NVIC_InitStructure);     
 65 }
 66 
 67 void NVIC_Configuration1(void)        
 68 {
 69        NVIC_InitTypeDef NVIC_InitStructure; 
 70 
 71 //    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_3); 
 72                                                      
 73     NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;       
 74     NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;  
 75     NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;            
 76     NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; 
 77     NVIC_Init(&NVIC_InitStructure);    
 78 }
 79 
 80 void NVIC_Configuration2(void)
 81 {
 82     NVIC_InitTypeDef NVIC_InitStructure; 
 83 
 84 //    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_3); 
 85 
 86     NVIC_InitStructure.NVIC_IRQChannel = EXTI2_IRQn;       
 87     NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;  
 88     NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;            
 89     NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; 
 90     NVIC_Init(&NVIC_InitStructure);       
 91 }
 92 
 93 void NVIC_Configuration3(void)
 94 {
 95     NVIC_InitTypeDef NVIC_InitStructure; 
 96 
 97 //    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_3); 
 98 
 99     NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn;       
100     NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;  
101     NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;            
102     NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; 
103     NVIC_Init(&NVIC_InitStructure);      
104 }
105 
106 void NVIC_Configuration4(void)
107 {
108     NVIC_InitTypeDef NVIC_InitStructure; 
109 
110 //    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_3); 
 
112     NVIC_InitStructure.NVIC_IRQChannel = EXTI4_IRQn;      
113     NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 4;  
114     NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;          
115     NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; 
116     NVIC_Init(&NVIC_InitStructure);       
117 }
118 
119 void NVIC_Configuration5(void)
120 {
121     NVIC_InitTypeDef NVIC_InitStructure; 
122 
123 //    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_3); 
124 
125     NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;       
126     NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 5;  
127     NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;            
128     NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; 
129     NVIC_Init(&NVIC_InitStructure);       
130 }
131    
132 int main(void)
133 {
134         RCC_Configration();
135         GPIO_Configration();
136         EXTI_Configuration();
137         NVIC_Configuration0();
138         NVIC_Configuration1();
139         NVIC_Configuration2();
140         NVIC_Configuration3();
141         NVIC_Configuration4();
142         NVIC_Configuration5();
143         while(1);
144 }