📄 flash.lst
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C51 COMPILER V7.20 FLASH 06/23/2008 19:39:41 PAGE 1
C51 COMPILER V7.20, COMPILATION OF MODULE FLASH
OBJECT MODULE PLACED IN Flash.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\c51.exe Flash.c DB OE
line level source
1 //头文件
2 /////////////////////////////
3 #include "c8051F340.h"
4 #include "stdio.h"
5 ////////////////////////////////////////////////////////////////////////////////////////////////////
6 //位定义
7 sbit FLASH_WP =P3^0; //命令锁存
8 sbit FLASH_WE =P3^1; //地址锁存
9 sbit FLASH_ALE =P3^2; //写保护
10 sbit FLASH_CLE =P3^3; //片选
11 sbit FLASH_CE =P3^7; //写使能
12 sbit FLASH_RE =P3^4; //读使能
13 sbit FLASH_RB =P3^5; //忙指示
14 sbit FLASH_SE =P3^6;
15
16 //P4口为数据口
17 //注释掉的函数在需要时可以取掉注释即可
18 ///////////////////////////////////////////////////////////////////////////////////////////////////
19 //FLASH函数声明
20 void Flash_Init(void); //FLASH初始化
21 //unsigned int Get_Flash_ID(void); //读FLASH的ID号
22 //unsigned char Get_Flash_Status(void); //读FLASH的状态
23 unsigned char Flash_Erase_Block(unsigned int BlockNum); //擦除FLASH中的第BlockNum个BLOCK,擦除成功则返回1
24 void Flash_Read_Page(unsigned int BLockNum,unsigned char BlockPageNum,unsigned char *P,unsigned int Dat
-a_Length);
25 //读出第BlockNum个BLOCK中第BlockPageNum个PAGE中的内容，长度为Data_Length
26 unsigned char Flash_Write_Page(unsigned int BLockNum,unsigned char BlockPageNum,unsigned char *P,unsigned
- int Data_Length);
27 //意义同上
28 void Flash_Write_Command(unsigned char command); //写命令
29 void Flash_Write_Address(unsigned char address); //写地址
30 void Flash_Write_Data(unsigned char num); //写一字节数据
31 unsigned char Flash_Read_Data(void); //读一字节数据
32
33 //void Test_Flash(void); //FLASH测试函数，首先读取FLASH的ID号，然后写入512字节数据，再读出来，判断是否正
-确
34
35 extern void Time_Delay(unsigned int time);
36 ////////////////////////////////////////////////////////////////////////////////////////////////////
37
38
39 void Flash_Init()
40 {
41 1 unsigned int i=0;
42 1 FLASH_SE=0;FLASH_WP=1;FLASH_CE=0;FLASH_ALE=0;
43 1 FLASH_CLE=0;FLASH_WE=1;FLASH_RE=1;FLASH_RB=1; //控制位的初始状态
44 1 Flash_Write_Command(0xff); //复位命令
45 1 Time_Delay(50); //延时50ms
46 1 }
47 /*
48 unsigned int Get_Flash_ID(void)
49 {
50 unsigned int id=0;
51 Flash_Write_Command(0x90); //读ID命令
52 Flash_Write_Address(0x00); //地址
C51 COMPILER V7.20 FLASH 06/23/2008 19:39:41 PAGE 2
53 id=Flash_Read_Data(); //读ID的高8位
54 id *=256;
55 id+=Flash_Read_Data(); //读ID的低8位
56 return(id);
57 }
58
59
60 unsigned char Get_Flash_Status()
61 {
62 unsigned char status=0;
63 Flash_Write_Command(0x70);
64 status=Flash_Read_Data();
65 return(status);
66 }*/
67
68 unsigned char Flash_Erase_Block(unsigned int BlockNum)
69 {
70 1 unsigned char Address_M=0,Address_H=0,Address_HH=0;
71 1 unsigned long PageNum=0;
72 1 unsigned char status=0;
73 1 PageNum=BlockNum*32; //计算PAGE地址（这是该BLOCK中的第一个PAGE），每个BLOCK含32个PAGE
74 1 Address_M=PageNum & 0xff;
75 1 Address_H=(PageNum>>8) & 0xff; //擦除BLOCK时，只需要输入地址的高两字节，此处为计算地址的高两字节
76 1 Address_HH=(PageNum>>8) & 0xff;
77 1
78 1 Flash_Write_Command(0x60); //发送擦除命令
79 1 Flash_Write_Address(Address_M);
80 1 Flash_Write_Address(Address_H); //发送地址
81 1 Flash_Write_Address(Address_HH);
82 1 Flash_Write_Command(0xd0); //启动擦除
83 1 P2MDOUT =0xbf;
84 1 FLASH_RB=1; //FLASH_RB漏极开路输出
85 1 while(!FLASH_RB) //判断是否擦除完毕
86 1 {}
87 1
88 1 Flash_Write_Command(0x70); //发送读状态命令
89 1 status=Flash_Read_Data(); //读状态
90 1 if(status & 0x01) //如果有错误，则返回false
91 1 {
92 2 return(0);
93 2 }
94 1 else //否则返回true
95 1 {
96 2 return(1);
97 2 }
98 1 }
99
100 void Flash_Read_Page(unsigned int BLockNum,unsigned char BlockPageNum,unsigned char *P,unsigned int Data_L
-ength)
101 {
102 1 unsigned int i=0;
103 1 unsigned long PageNum=0;
104 1 unsigned char Address_L=0,Address_M=0,Address_H=0,Address_HH=0;
105 1 PageNum=BLockNum*32+BlockPageNum; //计算该PAGE在整个FLASH中的PAGE地址
106 1 Address_L=0;
107 1 Address_M=PageNum & 0xff;
108 1 Address_H=(PageNum>>8) & 0xff;
109 1 Address_HH=(PageNum>>8) & 0xff;
110 1
111 1 Flash_Write_Command(0x00); //将内部指针指向A区
112 1 Flash_Write_Address(Address_L); //写地址
113 1 Flash_Write_Address(Address_M);
C51 COMPILER V7.20 FLASH 06/23/2008 19:39:41 PAGE 3
114 1 Flash_Write_Address(Address_H);
115 1 Flash_Write_Address(Address_HH);
116 1 for(i=0;i<Data_Length;i++)
117 1 {
118 2 *(P+i)=Flash_Read_Data(); //读数据
119 2 }
120 1
121 1 }
122
123 unsigned char Flash_Write_Page(unsigned int BLockNum,unsigned char BlockPageNum,unsigned char *P,unsigned
-int Data_Length)
124 {
125 1 unsigned int i=0;
126 1 unsigned long PageNum=0;
127 1 unsigned char Address_L=0,Address_M=0,Address_H=0,Address_HH=0;
128 1 unsigned char status=0;
129 1 PageNum=BLockNum*32+BlockPageNum; //计算该PAGE在整个FLASH中的PAGE地址
130 1 Address_L=0;
131 1 Address_M=PageNum & 0xff;
132 1 Address_H=(PageNum>>8) & 0xff;
133 1 Address_HH=(PageNum>>8) & 0xff;
134 1
135 1 Flash_Write_Command(0x00); //将内部指针指向A区
136 1 Flash_Write_Command(0x80); //写FLASH命令
137 1 Flash_Write_Address(Address_L); //写地址
138 1 Flash_Write_Address(Address_M);
139 1 Flash_Write_Address(Address_H);
140 1 Flash_Write_Address(Address_HH);
141 1 for(i=0;i<Data_Length;i++)
142 1 {
143 2 Flash_Write_Data(*(P+i)); //将数据写入缓冲区
144 2 }
145 1 Flash_Write_Command(0x10); //启动写入，将数据从缓冲区写入到FLASH
146 1 P2MDOUT =0xbf; //FLASH_RB漏极开路输出
147 1 FLASH_RB=1;
148 1 while(!FLASH_RB) //判断是否操作完毕
149 1 {}
150 1
151 1 Flash_Write_Command(0x70); //发送读状态命令
152 1 status=Flash_Read_Data(); //读状态
153 1 if(status & 0x01) //如果有错误，则返回false
154 1 {
155 2 return(0);
156 2 }
157 1 else //否则返回true
158 1 {
159 2 return(1);
160 2 }
161 1
162 1 }
163
164 void Flash_Write_Command(unsigned char command)
165 {
166 1 FLASH_ALE=0; //地址锁存禁止
167 1 FLASH_CLE=1; //命令锁存使能
168 1 FLASH_WE =0; //写使能信号，上升沿有效
169 1 P4=command;
170 1 FLASH_WE =1; //命令在上升沿写入
171 1 FLASH_CLE=0; //命令锁存禁止
172 1 FLASH_ALE=1;
173 1 }
174
C51 COMPILER V7.20 FLASH 06/23/2008 19:39:41 PAGE 4
175 void Flash_Write_Address(unsigned char address)
176 {
177 1 FLASH_WE=1;
178 1 FLASH_CLE=0; //命令锁存禁止
179 1 FLASH_ALE=1; //地址锁存使能
180 1 FLASH_WE =0; //写使能信号，上升沿有效
181 1 P4=address;
182 1 FLASH_WE =1; //上升沿写入
183 1 FLASH_ALE=0; //地址锁存禁止
184 1 }
185
186 void Flash_Write_Data(unsigned char num)
187 {
188 1 FLASH_WE=1;
189 1 FLASH_CLE=0; //命令锁存禁止
190 1 FLASH_ALE=0; //地址锁存禁止
191 1 FLASH_WE =0; //写使能信号, 上升沿有效
192 1 P4=num;
193 1 FLASH_WE =1; //命令在上升沿写入
194 1 }
195
196 unsigned char Flash_Read_Data(void)
197 {
198 1 unsigned char num=0;
199 1 FLASH_CLE =0; //命令锁存禁止
200 1 FLASH_ALE =0; //地址锁存禁止
201 1 P4 =0xff;
202 1 FLASH_RE =0; //读信号使能
203 1 P3MDOUT =0xdf; //FLASH_RB漏极开路输出
204 1 FLASH_RB=1;
205 1 while(!FLASH_RB) //判断是否操作完毕
206 1 {}
207 1 num=P4;
208 1 FLASH_RE=1;
209 1 return(num);
210 1 }
211 /*
212 void Test_Flash()
213 {
214 unsigned int Flash_ID;
215 xdata unsigned char Buffer[512];
216 unsigned int i=0,dat=0;
217 Flash_ID=Get_Flash_ID();
218 printf("Flash_ID is %u\n",Flash_ID);
219
220 for(i=0;i<512;i++)
221 {Buffer[i]=i;}
222 for(i=0;i<256;i++)
223 {Buffer[256+i]=i;}
224 Flash_Write_Page(1,1,Buffer,512);
225 for(i=0;i<512;i++)
226 {Buffer[i]=0;}
227 Flash_Read_Page(1,1,Buffer,512);
228 for(i=0;i<512;i++)
229 {
230 dat=Buffer[i];
231 printf("the No.%u data is %u\n",i,dat);
232 }
233
234 }*/
C51 COMPILER V7.20 FLASH 06/23/2008 19:39:41 PAGE 5
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 546 ----
CONSTANT SIZE = ---- ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = ---- 47
IDATA SIZE = ---- ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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