stm32f207中断问题

程轩104 · 发表于 2014-10-30 14:09:35

原子哥好，各位看官好，初始化了一个外部中断，但是进不去，不知道咋回事。我的中断口是gpio14，如果有数据发送的话中断自动打开，求帮我看看中断的初始化有什么问题。

[mw_shl_code=c,true] GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14; //中断 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_PuPd =GPIO_PuPd_NOPULL; GPIO_Init(GPIOG, &GPIO_InitStructure); NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); NVIC_InitStructure.NVIC_IRQChannel = EXTI2_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOG, EXTI_PinSource14); /* Configure Button EXTI line */ EXTI_InitStructure.EXTI_Line = EXTI_Line14 ; EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure); EXTI_ClearITPendingBit(EXTI_Line2);[/mw_shl_code] [mw_shl_code=c,true] [/mw_shl_code]

[mw_shl_code=c,true] [/mw_shl_code] [mw_shl_code=c,true][/mw_shl_code] [mw_shl_code=c,true]以下是具体的中断函数。[/mw_shl_code] [mw_shl_code=c,true]void EXTI2_IRQnHandler(void) { u8 sta1,L; printf("hello interrupt\n"); //开灯关灯证明进了中断 while(1) { STM_EVAL_LEDOff(LED2); for(int i=0;i<100000;i++); STM_EVAL_LEDOn(LED2); for(int i=0;i<100000;i++); } //清中断 GPIO_SetBits(GPIOG,GPIO_Pin_14); EXTI_ClearITPendingBit(EXTI_Line2); }[/mw_shl_code]

[mw_shl_code=c,true]清中断 // Read ITs, clear pending ones abApi_Write[0] = CMD_GET_INT_STATUS; // Use interrupt status command abApi_Write[1] = 0; // Clear PH_CLR_PEND abApi_Write[2] = 0; // Clear MODEM_CLR_PEND abApi_Write[3] = 0; // Clear CHIP_CLR_PEND // bApi_SendCommand(4,abApi_Write); // Send command to the radio IC SI4438_Write(abApi_Write[0] ,3,&abApi_Write[1] ); bApi_GetResponse(8,abApi_Write); // Make sure that CTS is ready then get the response [/mw_shl_code]