我想在从输入鼠标接收数据包的嵌入式系统中捕获鼠标移动数据包（初始化为ps/2模式）。如何调用我的异常处理程序？中断处理程序从未被触发。我设置处理器使用外部中断运行，并且只将一个信号连接到处理器的中断输入端口，我没有使用中断控制器。为了捕获输入移动，我使用基于软件的循环缓冲区。
请帮帮我。

#include "xparameters.h"
#include "xil_exception.h"
#include "ps2_core.h"

Ps2Core::Ps2Core(uint32_t core_base_addr) {
   base_addr = core_base_addr;
   registerCallback();
}

Ps2Core::~Ps2Core() {
}

void Ps2Core::enqueue(unsigned char value) {
    if ((tail + 1) % QUEUE_SIZE == head) {
    // queue is full, do nothing
    return;
    }
    queue[tail] = value;
    queueCount++;
    tail = (tail + 1) % QUEUE_SIZE;
}

unsigned char Ps2Core::dequeue(void) {
    if (head == tail) {
    // queue is empty, do nothing
    return 0;
    }
    unsigned char value = queue[head];
    queueCount--;
    head = (head + 1) % QUEUE_SIZE;
    return value;
}

void Ps2Core::handleInterrupt(Ps2Core *ps2) {
    uint8_t byte;
    byte = ps2->rx_byte();
    ps2->enqueue(byte);
}

void Ps2Core::registerCallback(){
    Xil_ExceptionInit();
    Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT,
                                    (Xil_ExceptionHandler)handleInterrupt,
                                    this);
    Xil_ExceptionEnable();
}

int Ps2Core::get_mouse_activity(int *lbtn, int *rbtn, int *xmov,
      int *ymov, int *zmov) {
   uint8_t b1, b2, b3, b4;

   uint32_t tmp;

   /* retrieve bytes only if 4 or a multiple of 4 exist in queue */
   if (queueCount >= 4) {
       b1 = dequeue();
       b2 = dequeue();
       b3 = dequeue();
       b4 = dequeue();
   }
   else
       return (0);
   /* extract button info */
   *lbtn = (int) (b1 & 0x01);      // extract bit 0
   *rbtn = (int) (b1 & 0x02) >> 1; // extract bit 1
   /* extract x movement; manually convert 9-bit 2's comp to int */
   tmp = (uint32_t) b2;
   if (b1 & 0x10)                // check MSB (sign bit) of x movement
      tmp = tmp | 0xffffff00;    // manual sign-extension if negative
   *xmov = (int) tmp;            // data conversion
   /* extract y movement; manually convert 9-bit 2's comp to int */
   tmp = (uint32_t) b3;
   if (b1 & 0x20)                // check MSB (sign bit) of y movement
      tmp = tmp | 0xffffff00;    // manual sign-extension if negative
   *ymov = (int) tmp;            // data conversion
   tmp = (uint32_t) b4;
   if (b4 & 0x08)               // check MSB (sign bit) of z movement
      tmp = tmp | 0xfffffff0;   // manual sign-extension if negative
   *zmov = (int) tmp;           // data conversion
   /* success */
   return (1);
}

• • 模块示例**

//instantiate uBlaze MCS
       cpu cpu_unit (
        .Clk(clk_100M),                          
        .Reset(reset),            
        .IO_addr_strobe(io_addr_strobe),    
        .IO_address(io_address),            
        .IO_byte_enable(io_byte_enable),    
        .IO_read_data(io_read_data),        
        .IO_read_strobe(io_read_strobe),    
        .IO_ready(io_ready),                
        .IO_write_data(io_write_data),      
        .IO_write_strobe(io_write_strobe),
        .INTC_Interrupt(interrupt)
        );
    

   // instantiated i/o subsystem
   mmio_sys_sampler_arty_a7  mmio_unit (
    .clk(clk_100M),
    .reset(reset),
    .mmio_cs(fp_mmio_cs),
    .mmio_wr(fp_wr),
    .mmio_rd(fp_rd),
    .mmio_addr(fp_addr), 
    .mmio_wr_data(fp_wr_data),
    .mmio_rd_data(fp_rd_data),
    .rx_done_tick(interrupt),
    .ps2d_in(ps2d_in),
    .ps2c_in(ps2c_in),
    .tri_c(tri_c),
    .tri_d(tri_d),
    .ps2c_out(ps2c_out),
    .ps2d_out(ps2d_out),          
    .rx(rx),
    .tx(tx)
   );