//initialize
Int_Init();
CPU_Init();
Gpio_Init();
xil_printf("begin\r\n");
Xil_ExceptionEnable();//這句放在這里,避免開機(jī)中斷
while(1);
return 0;
}
void InterruptHandler_IRQ(void)
{
u32 i;
u32 IntID;
u32 IntIDFull;
xil_printf("come in 1\r\n");
for (i = 0; i < 50000000; ++i) {}//延時(shí)防抖動(dòng)
//獲取目前發(fā)生的中斷號(hào)(#52)
IntIDFull = Xil_In32(ICCIAR);
IntID = IntIDFull & 0x3FF;
Xil_Out32(ICDICPR1, 0xFFFFFFFF);//ICD 中斷清標(biāo)志位
if(52 == IntID)
{
Xil_Out32(INT_DIS_1, 0x3FFFFF);//GPIO中斷屏蔽
Xil_Out32(INT_STAT_1, 0x3FFFFF);//GPIO清除標(biāo)志位

xil_printf("come in 2\r\n");

Xil_Out32(INT_EN_1, 0x40000);//GPIO中斷使能
}
Xil_Out32(ICCEOIR, IntIDFull);//cpu結(jié)束響應(yīng)，中斷 狀態(tài)由active->inactive
}
//對(duì)#52號(hào)中斷
void Int_Init(void)
{
Xil_Out32(ICDDCR, 0UL);//關(guān)閉中斷配置
Xil_Out32(ICDICER1, 0x100000);//不使能 #52
// Xil_Out32(ICDICFR3, 0x100);//電平觸發(fā)
Xil_Out32(ICDICFR3, 0x300);//邊沿觸發(fā)
Xil_Out32(ICDIPR13, 0xA0);//優(yōu)先級(jí)A0
Xil_Out32(ICDIPTR13, 0x01);//處理器為CPU0
Xil_Out32(ICDICPR1, 0xFFFFFFFF);//ICD 所有中斷清標(biāo)志位
Xil_Out32(ICDISER1, 0x100000);//使能 #52
Xil_Out32(ICDDCR, 0x01);//中斷分配器更新狀態(tài)
}

//GPIO MIO_50 MIO50(0x40000) 中斷#52(0x100000)
void Gpio_Init(void)
{
// Xil_Out32(DIRM_1, 0x40000);//output modem 沒影響
Xil_Out32(INT_DIS_1, 0x3FFFFF);//中斷屏蔽 [21:0]

// Xil_Out32(INT_TYPE_1, 0x000000);//電平觸發(fā)
// Xil_Out32(INT_POLARITY_1, 0x3FFFFF);//高電平

Xil_Out32(INT_TYPE_1, 0x3FFFFF);//邊沿觸發(fā)
Xil_Out32(INT_POLARITY_1, 0x3FFFFF);//上升沿
Xil_Out32(INT_ANY_1, 0x0);//單邊沿

Xil_Out32(INT_STAT_1, 0x3FFFFF);//GPIO清除標(biāo)志位
Xil_Out32(INT_EN_1, 0x40000);//中斷使能
}
void CPU_Init(void)
{
//中斷優(yōu)先級(jí)都是A0,優(yōu)先級(jí)高于F0，CPU可接受這些中斷
Xil_Out32(ICCPMR,0xF0);
//處理器能接收IRQ，使能中斷信號(hào)連接到處理器
Xil_Out32(ICCICR,0x07);
}