📄 eth.lst
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C51 COMPILER V7.10 ETH 07/24/2008 16:32:06 PAGE 1
C51 COMPILER V7.10, COMPILATION OF MODULE ETH
OBJECT MODULE PLACED IN ETH.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE ETH.C OPTIMIZE(9,SPEED) BROWSE DEBUG OBJECTEXTEND
line 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 "C8051f.h"
9 #include "net.h"
10 #include "serial.h"
11 #include "arp.h"
12 #include "ip.h"
13 #include "eth.h"
14
15
16 #define reg00 XBYTE[0x8000] //reg00- 10为isa网卡接口的寄存器地址300-310；
17 #define reg01 XBYTE[0x8001]
18 #define reg02 XBYTE[0x8002]
19 #define reg03 XBYTE[0x8003]
20 #define reg04 XBYTE[0x8004]
21 #define reg05 XBYTE[0x8005]
22 #define reg06 XBYTE[0x8006]
23 #define reg07 XBYTE[0x8007]
24 #define reg08 XBYTE[0x8008]
25 #define reg09 XBYTE[0x8009]
26 #define reg0a XBYTE[0x800a]
27 #define reg0b XBYTE[0x800b]
28 #define reg0c XBYTE[0x800c]
29 #define reg0d XBYTE[0x800d]
30 #define reg0e XBYTE[0x800e]
31 #define reg0f XBYTE[0x800f]
32 #define reg10 XBYTE[0x8010]
33
34 bit txd_buffer_select=0; //选择网卡的发送缓冲区
35 extern UCHAR idata debug;
36 extern UCHAR xdata arpbuf[];
37 extern UCHAR code my_hwaddr[];
38
39 void Delay1ms(unsigned char T);
40
41 extern UCHAR idata rcve_buf_allocated;
42 extern UINT volatile event_word;
43
44
45
46 #define Rtl8019ResetLow P5 &= ~(0x4); // P52
47 #define Rtl8019ResetHigh P5 |= 0x4; // P52
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 V7.10 ETH 07/24/2008 16:32:06 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 Rtl8019ResetHigh;;
66 1 Delay1ms(200);
67 1 Rtl8019ResetLow;
68 1 Delay1ms(200);
69 1 }
70
71 void ReadRtl8019NodeID(void)//读出网卡的物理地址存到my_ethernet_address.bytes[6]里
72 {
73 1 unsigned char data i;
74 1 page(0);
75 1 reg09=0; //读取网卡的ram的地址为0x0000
76 1 reg08=0;
77 1 reg0b=0;
78 1 reg0a=12; //读取12个字节
79 1 reg00=0x0a; //读ram
80 1 for (i=0;i<6;i++)
81 1 {
82 2 // my_hwaddr[i]=reg10;
83 2 // my_hwaddr[i]=reg10;
84 2 }
85 1 }
86
87 void WriteRtl8019NodeID()
88 {
89 1 page(1);
90 1 reg01=my_hwaddr[0];
91 1 reg02=my_hwaddr[1];
92 1 reg03=my_hwaddr[2];
93 1 reg04=my_hwaddr[3];
94 1 reg05=my_hwaddr[4];
95 1 reg06=my_hwaddr[5];
96 1 page(0);
97 1 }
98
99 void init_8019(void)
100 {
101 1 Delay1ms(10);
102 1 Rtl8019AS_Reset(); //复位8019
103 1 R8019_CHIP_SELECT;
104 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
105 1 Delay1ms(10); //延时10毫秒,确保芯片进入停止模式
106 1 page(0);
107 1 reg0a=0x00; reg0b=0x00;
108 1 reg0c= 0xe0; //monitor mode (no packet receive)
109 1 reg0d= 0xe2; //loop back mode 使芯片处于mon和loopback模式,跟外部网络断开
110 1 reg01=0x4c; reg02=0x80; reg03=0x4c; reg04=0x40;
111 1 reg07=0xff; //清除所有中断标志位
112 1 reg0f=0x00; //disable all interrupt
113 1 reg0e=0xc8; //byte dma 8位dma方式
114 1 page(1);
115 1 reg07=0x4d; reg08=0x00; reg09=0x00; reg0a=0x00; reg0b=0x00;
116 1 reg0c=0x00; reg0d=0x00; reg0e=0x00; reg0f=0x00;
117 1 reg00=0x22; //这时让芯片开始工作
C51 COMPILER V7.10 ETH 07/24/2008 16:32:06 PAGE 3
118 1 ReadRtl8019NodeID(); //读出网卡的物理地址48位
119 1 WriteRtl8019NodeID(); //将网卡地址写入到mar寄存器
120 1 page(0);
121 1 reg0c=0xcc; //将网卡设置成正常的模式,跟外部网络连接
122 1 reg0d=0xe0;
123 1 reg00=0x22; //这时让芯片开始工作
124 1 reg07=0xff; //清除所有中断标志位
125 1 }
126
127 //------------------------------------------------------------------------
128 // This functions checks 8019 status then sends an ethernet
129 // frame to it by calling an assembler function.
130 //------------------------------------------------------------------------
131
132 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*/
133 {
134 1 UCHAR i;
135 1 UINT ii;
136 1 page(0);
137 1 if(len<60)len=60;
138 1 txd_buffer_select=!txd_buffer_select;
139 1 if (txd_buffer_select)
140 1 reg09=0x40 ; //txdwrite highaddress
141 1 else
142 1 reg09=0x46 ; //txdwrite highaddress
143 1 reg08=0x00; //read page address low
144 1 reg0b=len>>8; //read count high
145 1 reg0a=len&0xff; //read count low;
146 1 reg00=0x12; //write dma, page0
147 1 for (ii=0;ii<len;ii++) //for (ii=4;ii<len+4;ii++) //是否加4有待验证
148 1 {
149 2 reg10=*(outbuf+ii);
150 2 }
151 1
152 1 /* 以下3句为中止dma的操作,可以不要 */
153 1 reg0b=0x00; //read count high 中止DMA操作
154 1 reg0a=0x00; //read count low;
155 1 reg00=0x22; //complete dma page 0
156 1
157 1 for(i=0;i<16;i++) //最多重发16次
158 1 {
159 2 for(ii=0;ii<1000;ii++) //检查txp为是否为低
160 2 {
161 3 if ((reg00&0x04)==0) break;
162 3 }
163 2 if ((reg04&0x01)!=0) break; //表示发送成功
164 2 reg00=0x3e;
165 2 }
166 1 reg07=0xff;
167 1 if(txd_buffer_select)
168 1 reg04=0x40; //txd packet start;
169 1 else
170 1 reg04=0x46; //txd packet start;
171 1 reg06=len>>8; //high byte counter
172 1 reg05=len&0xff; //low byte counter
173 1 reg07=0xff;
174 1 reg00=0x3e; //to sendpacket;
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