Zynq PL端中断实验

实验设计

在PL端设计两个IP核，具有中断功能。在PS端调用这两个IP核，IP核1计算完成后，如果其调用次数小于10，则继续调用，否则结束运行，IP核2每次计算完成后，如果其调用次数小于5，则继续调用，否则结束运行。

PL端IP核设计

为了简单起见，我们实现两个简单的IP核，它们分别实现向量加法和向量减法的功能。如下

向量加法IP

adder.cpp

#include"adder.h" void adder(int* a,int* b,int* c,int len){ #pragma HLS INTERFACE s_axilite port=return bundle=CTRL #pragma HLS INTERFACE s_axilite port=len bundle=CTRL #pragma HLS INTERFACE m_axi depth=100 port=a offset=slave bundle=A #pragma HLS INTERFACE m_axi depth=100 port=b offset=slave bundle=B #pragma HLS INTERFACE m_axi depth=100 port=c offset=slave bundle=C for(int i=0;i<len;i++){ #pragma HLS PIPELINE c[i]=a[i]+b[i]; } } 

adder.h

void adder(int* a,int* b,int* c,int len); 

向量减法IP

#include"subber.h" void subber(int* a,int* b,int *c,int len){ #pragma HLS INTERFACE s_axilite port=return bundle=CTRL #pragma HLS INTERFACE s_axilite port=len bundle=CTRL #pragma HLS INTERFACE m_axi depth=100 port=a offset=slave bundle=A #pragma HLS INTERFACE m_axi depth=100 port=b offset=slave bundle=B #pragma HLS INTERFACE m_axi depth=100 port=c offset=slave bundle=C for(int i=0;i<len;i++){ #pragma HLS PIPELINE II=1 c[i]=a[i]-b[i]; } } 

Block Design

注意通过concat ip将两个中断拼接，然后连接到zynq的IRQ中断管脚。如下图所示：

SDK代码编写

#include  #include "xscugic.h" #include "xil_exception.h" #include "sleep.h" #include"xadder.h" #include"xsubber.h" #define ADDER_DEVICE_ID XPAR_ADDER_0_DEVICE_ID #define SUBBER_DEVICE_ID XPAR_SUBBER_0_DEVICE_ID #define INTC_DEVICE_ID XPAR_SCUGIC_SINGLE_DEVICE_ID #define ADDER_IRPT_INTR XPAR_FABRIC_ADDER_0_INTERRUPT_INTR #define SUBBER_IRPT_INTR XPAR_FABRIC_SUBBER_0_INTERRUPT_INTR static XAdder adder; static XSubber subber; static XScuGic INTCInst; static void PL_intr_Handler(void *param); static int IntcInitFunction(u16 DeviceId); static int cnt1=0,cnt2=0; int a[10000]; int b[10000]; int c[10000]; void start_adder(){ XAdder_Set_a_r(&adder, (u32)a); XAdder_Set_b_r(&adder, (u32)b); XAdder_Set_c_r(&adder, (u32)c); XAdder_Set_len(&adder, (u32)10); XAdder_Start(&adder); } void start_subber(){ XSubber_Set_a_r(&subber, (u32)a); XSubber_Set_b_r(&subber, (u32)b); XSubber_Set_c_r(&subber, (u32)c); XSubber_Set_len(&subber, (u32)1000000); XSubber_Start(&subber); } static void PL_intr_Handler(void *param){ int sw_id = (int)param; printf("INTR ID=%d\n",sw_id); if(sw_id==1){ if(cnt1<5){ printf("SUBBER %d,END\n\r",cnt1); XSubber_InterruptClear(&subber,1); cnt1++; start_subber(); } else{ printf("SUBBER %d,END\n\r",cnt1); XSubber_InterruptClear(&subber, (u32)1); } } if(sw_id==2){ //cnt2++; if(cnt2<10){ printf("ADDER %d,END\n\r",cnt2); XAdder_InterruptClear(&adder,1); cnt2++; start_adder(); } else { printf("ADDER %d,END\n\r",cnt2); XAdder_InterruptClear(&adder, (u32)0x1); } } } int IntcInitFunction(u16 DeviceId){ XScuGic_Config *IntcConfig; int status; // Interrupt controller initialisation IntcConfig = XScuGic_LookupConfig(DeviceId); status = XScuGic_CfgInitialize(&INTCInst, IntcConfig, IntcConfig->CpuBaseAddress); if(status != XST_SUCCESS) return XST_FAILURE; // Call to interrupt setup Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT, (Xil_ExceptionHandler)XScuGic_InterruptHandler, &INTCInst); Xil_ExceptionEnable(); // Connect SW1~SW3 interrupt to handler status = XScuGic_Connect(&INTCInst, ADDER_IRPT_INTR, (Xil_ExceptionHandler)PL_intr_Handler, (void *)2); if(status != XST_SUCCESS) return XST_FAILURE; status = XScuGic_Connect(&INTCInst, SUBBER_IRPT_INTR, (Xil_ExceptionHandler)PL_intr_Handler, (void *)1); if(status != XST_SUCCESS) return XST_FAILURE; // XScuGic_Enable(&INTCInst,ADDER_IRPT_INTR ); XScuGic_Enable(&INTCInst,SUBBER_IRPT_INTR); XAdder_InterruptEnable(&adder, (u32)1); XAdder_InterruptGlobalEnable(&adder); XSubber_InterruptEnable(&subber, (u32)1); XSubber_InterruptGlobalEnable(&subber); Xil_ExceptionEnableMask(XIL_EXCEPTION_IRQ); return XST_SUCCESS; } int main(void){ // XAdder_Initialize(&adder,ADDER_DEVICE_ID); XSubber_Initialize(&subber,SUBBER_DEVICE_ID); IntcInitFunction(INTC_DEVICE_ID); XAdder_Start(&adder); XSubber_Start(&subber); while(1); return 0; } 

运行结果

可以看到，adder ip核运行了10次，subber ip核运行了5次，符合预期！