kw.c

网络中交换节点的上数据的交换和下行数据分发的硬件实现

   #include <stdio.h>
#include <c6x.h>
#include "head.h"
#include "reg.h"
unsigned volatile int  counter_32;
unsigned volatile int  counter_256;
unsigned volatile int  wng_clk;
unsigned volatile int  *wng_addr;
unsigned volatile int  wng_data;

void randx()
{
      *(unsigned volatile int *)GBLCTL = 0x00003798;  
       *(unsigned volatile int *)CECTL2 = 0x10410220;
        counter_32 = 0x00;
        counter_256= 0x00;
        wng_clk    = 0x00;
        wng_addr = (unsigned volatile int *)0x8000D004;
     // 打开TIMER1中断     
        ICR = IFR | 0x8000;
        IER |= 0x8002;             // enable int 15 (timer1) 
        CSR |= 1;
     //   timer11_init();
     //   timer1_start();
    *(unsigned volatile int *)CTL1 &= 0xff3f;/* hold the timer        */
	*(unsigned volatile int *)CTL1 |= 0x200; /* use CPU CLK/4         */   
	*(unsigned volatile int *)PRD1  = 0x800; /* set for a short period*/
	*(unsigned volatile int *)CTL1 |= 0x3C0; /* start the timer       */
}

unsigned int erandx()
{
extern int peek();
extern void  randx();
randx();
return peek(0x8000D004,2);

}


 /*读出工