www.pudn.com > TcpIpOn8051.rar > 8019DRV.C
/*------------------------------------------------------------------------------
8019drv.C
Copyright 1995-1999 Keil Software, Inc.
------------------------------------------------------------------------------*/
#include /* special function register declarations */
#include "public.h" /* for the intended 8051 derivative */
#include "8019drv.h"
#include "ether.h"
void page(BYTE pagenumber);
void readmynodeid(void);
void writemynodeid(void);
void initNIC(void);
void rtl8019as_rst(void);
void ne2000init(void);
void send_packet(netcard *txdnet,WORD length);
bit recv_packet(netcard *rxdnet);
extern void delay_ms(BYTE sec);
/*------------------------------------------------
The main C function. Program execution starts
here after stack initialization.
------------------------------------------------*/
void page(BYTE pagenumber)
{
BYTE data temp;
temp=reg00; //command register
temp=temp&0x3b;
pagenumber=pagenumber <<6;
temp=temp | pagenumber;
reg00=temp;
}
void readmynodeid(void)
{
BYTE data i,temp;
u protocal; //ÁÙʱ±äÁ¿
page(0);
reg09=0; //¼Ä´æÆ÷RSAR1 dma read highaddress=0
reg08=0; //RSAR0 dma read lowaddress=0;
reg0b=0; //RBCR1 read count high
reg0a=12; //RBCR0 count low
reg00=0x0a; //dma read and start
for (i=0;i<6;i++)
{
temp=reg10; //¶ÁÈ¡Ò»¸ö×Ö½Ú
if (i % 2==0)
{
protocal.bytes.high=temp;
}
else {protocal.bytes.low=temp;mypara.mynodeid[i/2].word=protocal.word;}
temp=reg10; //¶ÁÈ¡Ò»¸öÖظ´µÄ×Ö½Ú£¬Õâ¸ö×Ö½Ú±»¶ªÆú
}
}
void writemynodeid(void)
{
page(1);
reg01=mypara.mynodeid[0].bytes.high;
reg02=mypara.mynodeid[0].bytes.low;
reg03=mypara.mynodeid[1].bytes.high;
reg04=mypara.mynodeid[1].bytes.low;
reg05=mypara.mynodeid[2].bytes.high;
reg06=mypara.mynodeid[2].bytes.low;
}
void initNIC(void)
{
readmynodeid();
writemynodeid();
txd_buffer_select=0;
}
void rtl8019as_rst(void)
{
BYTE a;
a=P1;
P1=a&0xfb;
//P1^2=0;
}
/*------------------------
ne2000Íø¿¨³õʼ»¯
------------------------*/
void ne2000init(void)
{
//rtl8019as_rst(); //Íø¿¨¸´Î»
reg00=0x21; //Ñ¡ÔñÒ³0µÄ¼Ä´æÆ÷£¬Íø¿¨Í£Ö¹ÔËÐУ¬ÒòΪ»¹Ã»Óгõʼ»¯¡£
delay_ms(10); //ÑÓʱ10ºÁÃë,È·±£Ð¾Æ¬½øÈëֹͣģʽ
//ʹоƬ´¦ÓÚmonºÍloopbackģʽ,¸úÍⲿÍøÂç¶Ï¿ª
page(0);
reg01=0x4c; //PSTART ½ÓÊÕ»º³åÇøµÄÆðʼҳµÄµØÖ·
reg02=0x80; //PSTOP ½ÓÊÕ»º³åÇøµÄ½áÊøÒ³µØÖ·¡££¨¸ÃÒ³²»ÓÃÓÚ½ÓÊ
//ʹÓÃ0x40-0x4BΪÍø¿¨µÄ·¢ËÍ»º³åÇø£¬¹²12Ò³£¬¸ÕºÃ¿ÉÒÔ´æ´¢2¸ö×î´óµÄÒÔÌ«Íø°ü¡£
//ʹÓÃ0x4c£0x7fΪÍø¿¨µÄ½ÓÊÕ»º³åÇø£¬¹²52Ò³¡£
reg03=0x4c; //BNRY Ö¸Ïò×îºóÒ»¸öÒѾ¶ÁÈ¡µÄÒ³£¨¶ÁÖ¸Õ룩
reg04=0x40; //TPSR Ϊ·¢ËÍÒ³µÄÆðʼҳµØÖ·¡£³õʼ»¯ÎªÖ¸ÏòµÚÒ»¸ö·¢ËÍ»º³åÇøµÄÒ³£¬0x40
reg0c=0xcc; //RCR ½ÓÊÕÅäÖüĴæÆ÷£¬ÉèÖÃΪʹÓýÓÊÕ»º³åÇø£¬½ö½ÓÊÕ×Ô¼ºµÄµØÖ·µÄÊý¾Ý°ü
//£¨ÒÔ¼°¹ã²¥µØÖ·Êý¾Ý°ü£©ºÍ¶àµã²¥Ë͵ØÖ·°ü£¬Ð¡ÓÚ64×ֽڵİü¶ªÆú
//reg0c=0x1f;
reg0d=0xe0; //TCR ·¢ËÍÅäÖüĴæÆ÷£¬ÆôÓÃcrc×Ô¶¯Éú³ÉºÍ×Ô¶¯Ð£Ñ飬¹¤×÷ÔÚÕý³£Ä£Ê½¡£
reg0e=0xc8; //DCR Êý¾ÝÅäÖüĴæÆ÷£¬ÉèÖÃΪʹÓÃFIFO»º´æ£¬ÆÕͨģʽ£¬8λÊý¾Ý´«Êäģʽ
//×Ö½Ú˳ÐòΪ¸ßλ×Ö½ÚÔÚÇ°£¬µÍλ×Ö½ÚÔÚºó
reg0a=0x00; //RBCR0,Remote Byte Count Register
reg0b=0x00; //RBCR1,Remote Byte Count Register
reg07=0xFF; //Çå³ýËùÓÐÖжϱê־λ
reg0f=0x00; //IMR disable all interrupt
page(1); //Ñ¡ÔñÒ³1µÄ¼Ä´æÆ÷
reg07=0x4D; //CURRÊÇÍø¿¨Ð´ÄÚ´æµÄÖ¸Õë¡£ËüÖ¸Ïòµ±Ç°ÕýÔÚдµÄÒ³µÄÏÂÒ»Ò³
reg08=0xff; //MAR0
reg09=0xff; //MAR1
reg0a=0xff; //MAR2
reg0b=0xff; //MAR3
reg0c=0xff; //MAR4
reg0d=0xff; //MAR5
reg0e=0xff; //MAR6
reg0f=0xff; //MAR7
// initNIC(); //³õʼ»¯MACµØÖ·ºÍÍøÂçÏà¹Ø²ÎÊý
//½«Íø¿¨ÉèÖóÉÕý³£µÄģʽ,¸úÍⲿÍøÂçÁ¬½Ó
page(0);
reg0c=0xCC; //RCR
reg0d=0xE0; //TCR
reg00=0x22; //ÕâʱÈÃоƬ¿ªÊ¼¹¤×÷?
reg07=0xFF; //Çå³ýËùÓÐÖжϱê־λ
}
/*----------------------------------------------------------------
ne2000·¢°ü×Ó³ÌÐò
·¢ËÍÒ»¸öÊý¾Ý°üµÄÃüÁî,³¤¶È×îСΪ60×Ö½Ú
×î´ó1514×Ö½ÚÐèÒª·¢Ë͵ÄÊý¾Ý°üÒªÏÈ´æ·ÅÔÚtxdnet»º³åÇø
-----------------------------------------------------------------*/
void send_packet(netcard *txdnet,WORD length)
{
BYTE i;
WORD ii;
page(0);
if(length<60) length=60;
for(i=0;i<3;i++)
txdnet->etherframe.sourcenodeid[i]=mypara.mynodeid[i].word;
txd_buffer_select=!txd_buffer_select;
if(txd_buffer_select)
reg09=0x40 ; //txdwrite highaddress,send buffer 0
else
reg09=0x46 ; //txdwrite highaddress,send buffer 1
reg08=0x00; //read page address low
reg0b=length>>8; //read count high
reg0a=length&0xFF; //read count low
reg00=0x12; //write dma, page0
for(ii=4;iibytes.bytebuf[ii];
for(i=0;i<6;i++){ //×î¶àÖØ·¢6´Î
for(ii=0;ii<1000;ii++) //¼ì²étxpΪÊÇ·ñΪµÍ
if((reg00&0x04)==0) break;
if((reg04&0x01)!=0) break; //±íʾ·¢Ëͳɹ¦
reg00=0x3E;
}
if(txd_buffer_select) reg04=0x40; //txd packet start send buffer 0;
else reg04=0x46; //txd packet start send buffer 1;
reg06=length>>8; //high byte counter
reg05=length&0xFF; //low byte counter
reg00=0x3E; //to sendpacket;
}
bit recv_packet(netcard *rxdnet)//ne2000ÊÕ°ü×Ó³ÌÐò
{
BYTE i;
WORD ii;
BYTE bnry,curr;
page(0);
reg07=0xFF;
bnry=reg03; //bnry page have read ¶ÁÒ³Ö¸Õë
page(1);
curr=reg07; //curr writepoint 8019дҳָÕë
page(0);
if(curr==0)
return 0; //¶ÁµÄ¹ý³Ì³ö´í
bnry=bnry+1;
if(bnry>0x7F) bnry=0x4C;
if(bnry!=curr){ //´Ëʱ±íʾÓÐеÄÊý¾Ý°üÔÚ»º³åÇøÀï
//¶ÁÈ¡Ò»°üµÄÇ°18¸ö×Ö½Ú:4×Ö½ÚµÄ8019Í·²¿,6×Ö½ÚÄ¿µÄµØÖ·,6×Ö½ÚÔµØÖ·,2×Ö½ÚÐÒé
//ÔÚÈκβÙ×÷¶¼×îºÃ·µ»Øpage0
page(0);
reg09=bnry; //read page address high
reg08=0x00; //read page address low
reg0b=0x00; //read count high
reg0a=18; //read count low
reg00=0x0A; //read dma
for(i=0;i<18;i++)
rxdnet->bytes.bytebuf[i]=reg10;
i=rxdnet->bytes.bytebuf[3]; //½«³¤¶È×ֶεĸߵÍ×Ö½Úµôת
rxdnet->bytes.bytebuf[3]=rxdnet->bytes.bytebuf[2];
rxdnet->bytes.bytebuf[2]=i;
rxdnet->etherframe.length=rxdnet->etherframe.length-4; //È¥µô4¸ö×Ö½ÚµÄCRC
//±íʾ¶ÁÈëµÄÊý¾Ý°üÓÐЧ
if(((rxdnet->bytes.bytebuf[0]&0x01)==0)||(rxdnet->bytes.bytebuf[1]>0x7F)||(rxdnet->bytes.bytebuf[1]<0x4C)||(rxdnet->bytes.bytebuf[2]>0x06))
{
//½ÓÊÕ״̬´íÎó,»òÕßnext_page_start´íÎó»òÕß³¤¶È´íÎó,½«¶ªÆúËùÓÐÊý¾Ý°ü
page(1);
curr=reg07; //current page
if((curr>0x7f)||(curr<0x4c)) curr=0x4d;
reg07=curr;
page(0); //Çл»»Øpage0
bnry=curr-1;
if(bnry<0x4C) bnry=0x7F;
reg03=bnry; //write to bnry
return 0;
}
else{ //±íʾÊý¾Ý°üÊÇÍêºÃµÄ.¶ÁȡʣϵÄÊý¾Ý
if((rxdnet->etherframe.protocal==0x0800)||(rxdnet->etherframe.protocal==0x0806)){
//ÐÒéΪIP»òARP²Å½ÓÊÕ
reg09=bnry; //read page address high
reg08=4; //read page address low
reg0b=rxdnet->etherframe.length>>8; //read count high
reg0a=rxdnet->etherframe.length&0xFF; //read count low
reg00=0x0A; //read dma
for(ii=4;iietherframe.length+4;ii++)
rxdnet->bytes.bytebuf[ii]=reg10;
}
bnry=rxdnet->bytes.bytebuf[1]-1;//next page start-1
if(bnry<0x4C) bnry=0x7F;
reg03=bnry; //write to bnry
return 1; //have new packet
}
}
return 0;
}
/*EOF*/