GPIO中断控制LED亮灭，vivado设置与GPIO_MIO相同，SDK软件的main.c代码如下：
#include "stdio.h"
#include "xparameters.h"
#include "xgpiops.h"
#include "sleep.h"
#include "xscugic.h"#define GPIO_DEVICE_ID XPAR_XGPIOPS_0_DEVICE_ID
#define MIO0_LED 0 //核心板上PS端的LED
#define GPIO_INTERRUPT_ID XPAR_XGPIOPS_0_INTR //GPIO中断号，52
#define INTC_DEVICE_ID XPAR_SCUGIC_SINGLE_DEVICE_ID
#define MIO12_KEY 12
#define XGPIOPS_IRQ_TYPE_EDGE_FALLING 0x01U /**< Interrupt Falling edge */XGpioPs_Config *ConfigPtr;
XScuGic_Config *IntcConfig; /* Instance of the interrupt controller */XGpioPs Gpio;
XScuGic Intc;void SetupInterruptSystem(XScuGic *GicInstancePtr, XGpioPs *Gpio, u16 GpioIntrId);
void IntrHandler();
u32 key_press;int main ( )
{u32 led_value = 0;printf(" GPIO INTERRPUT TEST!\n\r");//根据器件的ID，查找器件的配置信息ConfigPtr = XGpioPs_LookupConfig(GPIO_DEVICE_ID);//初始化GPIO驱动XGpioPs_CfgInitialize(&Gpio, ConfigPtr,ConfigPtr->BaseAddr);//&地址，返回值为固定值，可以不需要返回值//LED,GPIO方向设置为输出（0，input；1，output）XGpioPs_SetDirectionPin(&Gpio, MIO0_LED, 0x1);//LED,设置输出使能（0，关闭；1，打开）XGpioPs_SetOutputEnablePin(&Gpio, MIO0_LED, 0x1);//KEY,GPIO方向设置为输入（0，input；1，output）XGpioPs_SetDirectionPin(&Gpio, MIO12_KEY, 0x0);//设置中断SetupInterruptSystem(&Intc, &Gpio, GPIO_INTERRUPT_ID);while (1){if(key_press){led_value = ~led_value;key_press = 0;//清零之前的中断状态XGpioPs_IntrClearPin(&Gpio, MIO12_KEY);//将led_value写入到ledXGpioPs_WritePin(&Gpio, MIO0_LED, led_value);//延时200ms,按键消抖usleep(200000);//使能引脚中断XGpioPs_IntrEnablePin(&Gpio, MIO12_KEY);}}return 0;
}void SetupInterruptSystem(XScuGic *GicInstancePtr, XGpioPs *Gpio, u16 GpioIntrId)
{//查找GIC器件配置信息，并初始化XScuGic_LookupConfig(INTC_DEVICE_ID);XScuGic_CfgInitialize(GicInstancePtr, IntcConfig,IntcConfig->CpuBaseAddress);//初始化ARM异常句柄Xil_ExceptionInit();//给IRQ异常注册处理程序Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT,(Xil_ExceptionHandler)XScuGic_InterruptHandler,GicInstancePtr);//使能处理器中断Xil_ExceptionEnableMask(XIL_EXCEPTION_IRQ);//为GPIO使能中断XScuGic_Enable(GicInstancePtr, GpioIntrId);//关联中断处理函数（当外部中断来临时，跳到中断处理程序，处理完成后，返回正常程序）XScuGic_Connect(GicInstancePtr, GpioIntrId,(Xil_ExceptionHandler)IntrHandler,(void *)Gpio);//中断触发类型下降沿触发XGpioPs_SetIntrTypePin(Gpio, MIO12_KEY, XGPIOPS_IRQ_TYPE_EDGE_FALLING);//打开MIO引脚的中断使能XGpioPs_IntrEnablePin(Gpio, MIO12_KEY);}//中断处理函数
void IntrHandler() {printf("Interrupt detected!\n\r");key_press = 1;XGpioPs_IntrDisablePin(&Gpio, MIO12_KEY);}