Zynq 自定义模块中断触发实例

最近，设计PL与PS数据交互，用到自定义IP模块，同时需要给ARM侧一个ACK信号，考虑到实时性，采用PL-PS的IRQ。

参考官网文档：

The_Zynq_Book_ebook.pdf

UG111 Embedded System Tools Reference Manual.pdf 的Interrupt Management部分

得到中断处理基本流程：（具体函数参考 SCUGIC API）

1）中断初始化

2)  调用中断建立函数

3）Xilinx中断触发使能

4）连接中断操作函数

5）配置中断触发信号

6）使能中断控制器

下面是中断触发实例：

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/*

 * helloworld.c: simple test application

 *

 * This application configures UART 16550 to baud rate 9600.

 * PS7 UART (Zynq) is not initialized by this application, since

 * bootrom/bsp configures it to baud rate 115200

 *

 * ------------------------------------------------

 * | UART TYPE   BAUD RATE                        |

 * ------------------------------------------------

 *   uartns550   9600

 *   uartlite    Configurable only in HW design

 *   ps7_uart    115200 (configured by bootrom/bsp)

 */

#include <stdio.h>

#include "platform.h"

#include "xscugic.h"

#include "xil_exception.h"

#include "xparameters.h"

#include "pthread.h"

#define INT_CFG0_OFFSET 0x00000C00

#define BRAM_CTRL_1XPAR_AXI_BRAM_CTRL_1_S_AXI_BASEADDR

#define BRAM_CTRL_2 XPAR_AXI_BRAM_CTRL_2_S_AXI_BASEADDR

// Parameter definitions

#define MM2S_INT_ID             61

#define S2MM_INT_ID             62

#define INTC_DEVICE_ID          XPAR_PS7_SCUGIC_0_DEVICE_ID

#define INT_TYPE_RISING_EDGE    0x03

#define INT_TYPE_HIGHLEVEL      0x01

#define INT_TYPE_MASK           0x03

static XScuGic INTCInst;

static XScuGic_Config *IntcConfig;

//pthread_t thread_tx;

static void MM2S_intr_Handler(void *param);

static void S2MM_intr_Handler(void *param);

static void IntcTypeSetup(XScuGic *InstancePtr, int intId, int intType);

static int IntcInitFunction(u16 DeviceId);

static void MM2S_intr_Handler(void *param)

{

    int sw_id = (int)param;

    int num, rev;

    printf("------ MM2S of %d Interrupt ----- \n\r", sw_id);

    for(num = 0; num<15; num++)

    {

    rev = Xil_In32(BRAM_CTRL_1 + num*4);

    printf( "The data at %x is %x \n\r",BRAM_CTRL_1 + num*4,rev);

    }

}

static void S2MM_intr_Handler(void *param)

{

    int sw_id = (int)param;

    int num, rev;

    printf("------ S2MM of %d Interrupt ----- \n\r", sw_id);

    for(num = 0; num<15; num++)

    {

    rev = Xil_In32(BRAM_CTRL_2 + num*4);

    printf( "The data at %x is %x \n\r",BRAM_CTRL_2 + num*4,rev);

    }

}

void IntcTypeSetup(XScuGic *InstancePtr, int intId, int intType)

{

    int mask;

    intType &= INT_TYPE_MASK;

    mask = XScuGic_DistReadReg(InstancePtr, INT_CFG0_OFFSET + (intId/16)*4);

    mask &= ~(INT_TYPE_MASK << (intId%16)*2);

    mask |= intType << ((intId%16)*2);

    XScuGic_DistWriteReg(InstancePtr, INT_CFG0_OFFSET + (intId/16)*4, mask);

}

int IntcInitFunction(u16 DeviceId)

{

    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 MM2S and S2MM interrupt to handler

    status = XScuGic_Connect(&INTCInst,

    MM2S_INT_ID,

                             (Xil_ExceptionHandler)MM2S_intr_Handler,

                             (void *)1);

    if(status != XST_SUCCESS) return XST_FAILURE;

    status = XScuGic_Connect(&INTCInst,

    S2MM_INT_ID,

                             (Xil_ExceptionHandler)S2MM_intr_Handler,

                             (void *)2);

4000

    if(status != XST_SUCCESS) return XST_FAILURE;

    // Set interrupt type of MM2S and S2MM to rising edge

    IntcTypeSetup(&INTCInst, MM2S_INT_ID, INT_TYPE_RISING_EDGE);

    IntcTypeSetup(&INTCInst, S2MM_INT_ID, INT_TYPE_RISING_EDGE);

    // Enable MM2S and S2MM interrupts in the controller

    XScuGic_Enable(&INTCInst, MM2S_INT_ID);

    XScuGic_Enable(&INTCInst, S2MM_INT_ID);

    return XST_SUCCESS;

}

int main(void)

{

    init_platform();

    printf("--------PL inttrupt test----------\n\r");

    IntcInitFunction(INTC_DEVICE_ID);

//    pthread_create(&thread_tx, NULL, &MM2S_intr_Handler, NULL);

    while(1){

    // WAIT

    };

    cleanup_platform();

    return 0;

}