zynq 中断

#include "stdio.h"
#include "xparameters.h"
#include "xgpiops.h"
#include "xscugic.h"
#include "sleep.h"

//ps_led
#define MIO15_LED 15

#define MIO47_KEY 47

#define GPIO_DEVICE_ID XPAR_XGPIOPS_0_DEVICE_ID

//GPIO的中断号 52
#define GPIO_INTERRUPT_ID XPAR_XGPIOPS_0_INTR
#define INTC_DEVICE_ID XPAR_SCUGIC_SINGLE_DEVICE_ID

XGpioPs_Config *ConfigPtr;
XGpioPs Gpio;
XScuGic Intc;
XScuGic_Config *IntcConfig;

void IntrHandler();

void SetupInterruptSystem(XScuGic *GicInstancePtr, XGpioPs *Gpio,u16 GpioIntrId);

u32 key_press;

int main(){
u32 led_value = 0;
printf("GPIO interupt TEST !");

//根据器件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);

//把gpio的方向设置为输出（0：输入，1：输出）
XGpioPs_SetDirectionPin(&Gpio, MIO15_LED, 1);

//设置输出使能(0:关闭/1：打开）
XGpioPs_SetOutputEnablePin(&Gpio, MIO15_LED, 1);

XGpioPs_SetDirectionPin(&Gpio, MIO47_KEY, 0x0);

SetupInterruptSystem(&Intc, &Gpio, GPIO_INTERRUPT_ID);

while(1){
if(key_press){
led_value = ~led_value;
key_press = 0;
XGpioPs_WritePin(&Gpio, MIO15_LED,led_value);
XGpioPs_IntrClearPin(&Gpio, MIO47_KEY);
usleep(200000);
XGpioPs_IntrEnablePin(&Gpio, MIO47_KEY);
}
}
return 0;
}

void SetupInterruptSystem(XScuGic *GicInstancePtr, XGpioPs *Gpio,u16 GpioIntrId)
{

/*
* Initialize the interrupt controller driver so that it is ready to
* use.
*/

IntcConfig = XScuGic_LookupConfig(INTC_DEVICE_ID);
XScuGic_CfgInitialize(GicInstancePtr, IntcConfig,IntcConfig->CpuBaseAddress);

/*
* Connect the interrupt controller interrupt handler to the hardware
* interrupt handling logic in the processor.
*/
//初始化异常
Xil_ExceptionInit();
Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT,(Xil_ExceptionHandler)XScuGic_InterruptHandler,GicInstancePtr);
/* 使能处理器中断 */
Xil_ExceptionEnableMask(XIL_EXCEPTION_IRQ);

//关联中断处理函数
XScuGic_Connect(GicInstancePtr, GpioIntrId,(Xil_ExceptionHandler)IntrHandler,(void *)Gpio);

/*设置中断类型 */
XGpioPs_SetIntrTypePin(Gpio, MIO47_KEY, XGPIOPS_IRQ_TYPE_EDGE_FALLING);

/* 打开中断使能 */
XGpioPs_IntrEnablePin(Gpio, MIO47_KEY);

/*为GPIO器件使能中断 */
XScuGic_Enable(GicInstancePtr, GpioIntrId);
}

void IntrHandler(){
printf("interupt detected! ");
key_press = 1;
XGpioPs_IntrDisablePin(&Gpio, MIO47_KEY);
}