请问upp怎样连续接收FPGA的数据？

[tr]）写了这样的一个乒乓操作：
        while(pingpong_buffer_num <9){
        /*启动UPP DMA传输*/
        UARTPuts("pingn",-2);
        upp_reg_hdl->UPID0 = (Uint32)upp_buffer_test[pingpong_buffer_num];
        upp_reg_hdl->UPID1 = ((Uint32)upp_line_count << 16) | (Uint32)upp_line_size*sizeof(Uint16);
        upp_reg_hdl->UPID2 = (Uint32)upp_line_offset*sizeof(upp_buffer_ping[0]);

        while((upp_reg_hdl->UPIS2 & CSL_UPP_UPIS2_PEND_MASK) == 2){UARTPuts("pn",-2);};

        UARTPuts("pingn",-2);
        pingpong_buffer_num = ++pingpong_buffer_num;
        upp_reg_hdl->UPID0 = (Uint32)upp_buffer_test[pingpong_buffer_num];
        upp_reg_hdl->UPID1 = ((Uint32)upp_line_count << 16) | (Uint32)upp_line_size*sizeof(Uint16);
        upp_reg_hdl->UPID2 = (Uint32)upp_line_offset*sizeof(upp_buffer_ping[0]);

        while(upp_reg_hdl->UPIS2 & CSL_UPP_UPIS2_PEND_MASK == 2){UARTPuts("gn",-2);};、        pingpong_buffer_num = ++pingpong_buffer_num;
        }
接收FPGA发过来的连续数据（0-65535，循环）。为什么接收到的数据每个test数组之间不是连续的呢？感觉像是因为执行了中断处理函数耽误了时间。如果是这样改怎样解决呢




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