📄 eth.lst
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C51 COMPILER V7.06 ETH 05/19/2004 15:18:10 PAGE 1
C51 COMPILER V7.06, COMPILATION OF MODULE ETH
OBJECT MODULE PLACED IN ETH.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE ETH.C LARGE BROWSE DEBUG OBJECTEXTEND
stmt level source
1 //-----------------------------------------------------------------------------
2 // Net ETH.C
3 //
4 // This module is the Ethernet layer
5 //-----------------------------------------------------------------------------
6 #include <string.h>
7 #include <stdlib.h>
8 #include <stdio.h>
9 #include <reg52.h>
10 #include <absacc.h>
11 #include "net.h"
12 #include "serial.h"
13 #include "arp.h"
14 #include "ip.h"
15 #include "eth.h"
16
17
18 #define reg00 XBYTE[0xc000] //reg00- 10为isa网卡接口的寄存器地址300-310；
19 #define reg01 XBYTE[0xc100]
20 #define reg02 XBYTE[0xc200]
21 #define reg03 XBYTE[0xc300]
22 #define reg04 XBYTE[0xc400]
23 #define reg05 XBYTE[0xc500]
24 #define reg06 XBYTE[0xc600]
25 #define reg07 XBYTE[0xc700]
26 #define reg08 XBYTE[0xc800]
27 #define reg09 XBYTE[0xc900]
28 #define reg0a XBYTE[0xca00]
29 #define reg0b XBYTE[0xcb00]
30 #define reg0c XBYTE[0xcc00]
31 #define reg0d XBYTE[0xcd00]
32 #define reg0e XBYTE[0xce00]
33 #define reg0f XBYTE[0xcf00]
34 #define reg10 XBYTE[0xd000]
35
36 bit txd_buffer_select=0; //选择网卡的发送缓冲区
37 extern UCHAR idata debug;
38 extern UCHAR xdata arpbuf[];
39 extern UCHAR code my_hwaddr[];
40
41 void Delay1ms(unsigned char T);
42
43 extern UCHAR idata rcve_buf_allocated;
44 extern UINT volatile event_word;
45
46 sbit RST8019=P3^2;
47
48
49 //------------------------------------------------------------------------
50 // Initialize the Cirrus Logic 8019 chip
51 //------------------------------------------------------------------------
52
53 void page(unsigned char pagenumber)
54 {
55 1 unsigned char data temp;
C51 COMPILER V7.06 ETH 05/19/2004 15:18:10 PAGE 2
56 1 temp=reg00;
57 1 temp=temp&0x3B ;
58 1 pagenumber=pagenumber <<6;
59 1 temp=temp | pagenumber;
60 1 reg00=temp;
61 1 }
62
63 void Rtl8019AS_Reset() //复位网卡
64 {
65 1 RST8019=1;
66 1 Delay1ms(200);
67 1 Delay1ms(200);
68 1 Delay1ms(200);
69 1 RST8019=0;
70 1 Delay1ms(100);
71 1 }
72
73 void ReadRtl8019NodeID(void)//读出网卡的物理地址存到my_ethernet_address.bytes[6]里
74 {
75 1 unsigned char data i;
76 1 page(0);
77 1 reg09=0; //读取网卡的ram的地址为0x0000
78 1 reg08=0;
79 1 reg0b=0;
80 1 reg0a=12; //读取12个字节
81 1 reg00=0x0a; //读ram
82 1 for (i=0;i<6;i++)
83 1 {
84 2 // my_hwaddr[i]=reg10;
85 2 // my_hwaddr[i]=reg10;
86 2 }
87 1 }
88
89 void WriteRtl8019NodeID()
90 {
91 1 page(1);
92 1 reg01=my_hwaddr[0];
93 1 reg02=my_hwaddr[1];
94 1 reg03=my_hwaddr[2];
95 1 reg04=my_hwaddr[3];
96 1 reg05=my_hwaddr[4];
97 1 reg06=my_hwaddr[5];
98 1 page(0);
99 1 }
100
101
102 void init_8019(void)
103 {
104 1
105 1 Rtl8019AS_Reset(); //复位8019
106 1 // R8019_CHIP_SELECT;
107 1 reg00=0x21; //使芯片处于停止模式,这时进行寄存器设置 停止模式下,将不会发送和接收数据包
108 1 Delay1ms(10); //延时10毫秒,确保芯片进入停止模式
109 1 page(0);
110 1 reg0a=0x00; reg0b=0x00;
111 1 reg0c= 0xe0; //monitor mode (no packet receive)
112 1 reg0d= 0xe2; //loop back mode 使芯片处于mon和loopback模式,跟外部网络断开
113 1 reg01=0x4c; reg02=0x80; reg03=0x4c; reg04=0x40;
114 1 reg07=0xff; //清除所有中断标志位
115 1 reg0f=0x00; //disable all interrupt
116 1 reg0e=0xc8; //byte dma 8位dma方式
117 1 page(1);
C51 COMPILER V7.06 ETH 05/19/2004 15:18:10 PAGE 3
118 1 reg07=0x4d; reg08=0x00; reg09=0x00; reg0a=0x00; reg0b=0x00;
119 1 reg0c=0x00; reg0d=0x00; reg0e=0x00; reg0f=0x00;
120 1 reg00=0x22; //这时让芯片开始工作
121 1 ReadRtl8019NodeID(); //读出网卡的物理地址48位
122 1 WriteRtl8019NodeID(); //将网卡地址写入到mar寄存器
123 1 page(0);
124 1 reg0c=0xcc; //将网卡设置成正常的模式,跟外部网络连接
125 1 reg0d=0xe0;
126 1 reg00=0x22; //这时让芯片开始工作
127 1 reg07=0xff; //清除所有中断标志位
128 1 }
129
130 //------------------------------------------------------------------------
131 // This functions checks 8019 status then sends an ethernet
132 // frame to it by calling an assembler function.
133 //------------------------------------------------------------------------
134
135 void send_frame(UCHAR xdata * outbuf, UINT len)/*发送一个数据包的命令,长度最小为60字节,最大1514字节*/
136 {
137 1 UCHAR i;
138 1 UINT ii;
139 1 page(0);
140 1 if(len<60)len=60;
141 1 txd_buffer_select=!txd_buffer_select;
142 1 if (txd_buffer_select)
143 1 reg09=0x40 ; //txdwrite highaddress
144 1 else
145 1 reg09=0x46 ; //txdwrite highaddress
146 1 reg08=0x00; //read page address low
147 1 reg0b=len>>8; //read count high
148 1 reg0a=len&0xff; //read count low;
149 1 reg00=0x12; //write dma, page0
150 1 for (ii=0;ii<len;ii++)
151 1 {
152 2 reg10=*(outbuf+ii);
153 2 }
154 1
155 1 /* 以下3句为中止dma的操作,可以不要 */
156 1 reg0b=0x00; //read count high 中止DMA操作
157 1 reg0a=0x00; //read count low;
158 1 reg00=0x22; //complete dma page 0
159 1
160 1 for(i=0;i<16;i++) //最多重发16次
161 1 {
162 2 for(ii=0;ii<1000;ii++) //检查txp为是否为低
163 2 {
164 3 if ((reg00&0x04)==0) break;
165 3 }
166 2 if ((reg04&0x01)!=0) break; //表示发送成功
167 2 reg00=0x3e;
168 2 }
169 1 reg07=0xff;
170 1 if(txd_buffer_select)
171 1 reg04=0x40; //txd packet start;
172 1 else
173 1 reg04=0x46; //txd packet start;
174 1 reg06=len>>8; //high byte counter
175 1 reg05=len&0xff; //low byte counter
176 1 reg07=0xff;
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