一个STC单片机EEPROM读写奇怪的问题 -

//本示例在Keil开发环境下请选择Intel的8058芯片型号进行编译
//若无特别说明,工作频率一般为11.0592MHz
#include "reg51.h"
#include "intrins.h"
#define FOSC 11059200UL
#define BAUD 115200
typedef bit BOOL;
typedef unsigned char BYTE;
typedef unsigned int WORD;
#define ERROR 0
#define OK 1
//-----------------------------------------------
sfr IAP_DATA = 0xC2; //IAP数据寄存器
sfr IAP_ADDRH = 0xC3; //IAP地址寄存器高字节
sfr IAP_ADDRL = 0xC4; //IAP地址寄存器低字节
sfr IAP_CMD = 0xC5; //IAP命令寄存器
sfr IAP_TRIG = 0xC6; //IAP命令触发寄存器
sfr IAP_CONTR = 0xC7; //IAP控制寄存器
sbit Begin_LED = P1^0;
sbit ERROR_LED = P1^3;
sbit OK_LED = P1^7;
#define CMD_IDLE 0 //空闲模式
#define CMD_READ 1 //IAP字节读命令
#define CMD_PROGRAM 2 //IAP字节编程命令
#define CMD_ERASE 3 //IAP扇区擦除命令
#define URMD 0 //0:使用定时器2作为波特率发生器
//1:使用定时器1的模式0(16位自动重载模式)作为波特率发生器
//2:使用定时器1的模式2(8位自动重载模式)作为波特率发生器
sfr P0M1 = 0x93;
sfr P0M0 = 0x94;
sfr P1M1 = 0x91;
sfr P1M0 = 0x92;
sfr P2M1 = 0x95;
sfr P2M0 = 0x96;
sfr P3M1 = 0xb1;
sfr P3M0 = 0xb2;
sfr P4M1 = 0xb3;
sfr P4M0 = 0xb4;
sfr P5M1 = 0xC9;
sfr P5M0 = 0xCA;
sfr P6M1 = 0xCB;
sfr P6M0 = 0xCC;
sfr P7M1 = 0xE1;
sfr P7M0 = 0xE2;
sfr T2H = 0xd6; //定时器2高8位
sfr T2L = 0xd7; //定时器2低8位
sfr AUXR = 0x8e; //辅助寄存器
//#define ENABLE_IAP 0x80 //if SYSCLK<30MHz
//#define ENABLE_IAP 0x81 //if SYSCLK<24MHz
#define ENABLE_IAP 0x82 //if SYSCLK<20MHz
//#define ENABLE_IAP 0x83 //if SYSCLK<12MHz
//#define ENABLE_IAP 0x84 //if SYSCLK<6MHz
//#define ENABLE_IAP 0x85 //if SYSCLK<3MHz
//#define ENABLE_IAP 0x86 //if SYSCLK<2MHz
//#define ENABLE_IAP 0x87 //if SYSCLK<1MHz
//测试地址
#define IAP_ADDRESS 0x0400
void IapIdle();
BYTE IapReadByte(WORD addr);
void IapProgramByte(WORD addr, BYTE dat);
void IapEraseSector(WORD addr);
BYTE sequential_write_flash_in_one_sector(WORD begin_addr, WORD counter, BYTE array[]);
BYTE write_flash_with_protect_in_one_sector(WORD begin_addr, WORD counter, BYTE array[]);
void InitUart();
BYTE SendData(BYTE dat);
#define display_Begin_LED() Begin_LED = 0
#define off_Begin_LED() Begin_LED = 1
#define display_OK_LED() OK_LED = 0
#define off_OK_LED() OK_LED = 1
#define display_ERROR_LED() ERROR_LED = 0
#define off_ERROR_LED() ERROR_LED = 1
//#define USED_BYTE_QTY_IN_ONE_SECTOR 1
//#define USED_BYTE_QTY_IN_ONE_SECTOR 2
//#define USED_BYTE_QTY_IN_ONE_SECTOR 4
//#define USED_BYTE_QTY_IN_ONE_SECTOR 8
//#define USED_BYTE_QTY_IN_ONE_SECTOR 16
//#define USED_BYTE_QTY_IN_ONE_SECTOR 32
//#define USED_BYTE_QTY_IN_ONE_SECTOR 64
#define USED_BYTE_QTY_IN_ONE_SECTOR 128
//#define USED_BYTE_QTY_IN_ONE_SECTOR 256
//#define USED_BYTE_QTY_IN_ONE_SECTOR 512
#define DEBUG_Data_Memory_Begin_Sector_addr 0x0400
BYTE xdata protect_buffer[USED_BYTE_QTY_IN_ONE_SECTOR];
/* 测试常量数组 */
BYTE code Test_array_total[512] =
{
0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,
0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f,
0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f,
0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f,
0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f,
0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f,
0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f,
0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f,
0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f,
0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f,
0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf,
0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0xbe,0xbf,
0xc0,0xc1,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xcb,0xcc,0xcd,0xce,0xcf,
0xd0,0xd1,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xdb,0xdc,0xdd,0xde,0xdf,
0xe0,0xe1,0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xeb,0xec,0xed,0xee,0xef,
0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff,
0xff,0xfe,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf3,0xf2,0xf1,0xf0,
0xef,0xee,0xed,0xec,0xeb,0xea,0xe9,0xe8,0xe7,0xe6,0xe5,0xe4,0xe3,0xe2,0xe1,0xe0,
0xdf,0xde,0xdd,0xdc,0xdb,0xda,0xd9,0xd8,0xd7,0xd6,0xd5,0xd4,0xd3,0xd2,0xd1,0xd0,
0xcf,0xce,0xcd,0xcc,0xcb,0xca,0xc9,0xc8,0xc7,0xc6,0xc5,0xc4,0xc3,0xc2,0xc1,0xc0,
0xbf,0xbe,0xbd,0xbc,0xbb,0xba,0xb9,0xb8,0xb7,0xb6,0xb5,0xb4,0xb3,0xb2,0xb1,0xb0,
0xaf,0xae,0xad,0xac,0xab,0xaa,0xa9,0xa8,0xa7,0xa6,0xa5,0xa4,0xa3,0xa2,0xa1,0xa0,
0x9f,0x9e,0x9d,0x9c,0x9b,0x9a,0x99,0x98,0x97,0x96,0x95,0x94,0x93,0x92,0x91,0x90,
0x8f,0x8e,0x8d,0x8c,0x8b,0x8a,0x89,0x88,0x87,0x86,0x85,0x84,0x83,0x82,0x81,0x80,
0x7f,0x7e,0x7d,0x7c,0x7b,0x7a,0x79,0x78,0x77,0x76,0x75,0x74,0x73,0x72,0x71,0x70,
0x6f,0x6e,0x6d,0x6c,0x6b,0x6a,0x69,0x68,0x67,0x66,0x65,0x64,0x63,0x62,0x61,0x60,
0x5f,0x5e,0x5d,0x5c,0x5b,0x5a,0x59,0x58,0x57,0x56,0x55,0x54,0x53,0x52,0x51,0x50,
0x4f,0x4e,0x4d,0x4c,0x4b,0x4a,0x49,0x48,0x47,0x46,0x45,0x44,0x43,0x42,0x41,0x40,
0x3f,0x3e,0x3d,0x3c,0x3b,0x3a,0x39,0x38,0x33,0x36,0x35,0x34,0x33,0x32,0x31,0x30,
0x2f,0x2e,0x2d,0x2c,0x2b,0x2a,0x29,0x28,0x27,0x26,0x25,0x24,0x23,0x22,0x21,0x20,
0x1f,0x1e,0x1d,0x1c,0x1b,0x1a,0x19,0x18,0x17,0x16,0x15,0x14,0x13,0x12,0x11,0x10,
0x0f,0x0e,0x0d,0x0c,0x0b,0x0a,0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x01,0x00
};
void main()
{
P0M0 = 0x00;
P0M1 = 0x00;
P1M0 = 0x00;
P1M1 = 0x00;
P2M0 = 0x00;
P2M1 = 0x00;
P3M0 = 0x00;
P3M1 = 0x00;
P4M0 = 0x00;
P4M1 = 0x00;
P5M0 = 0x00;
P5M1 = 0x00;
P6M0 = 0x00;
P6M1 = 0x00;
P7M0 = 0x00;
P7M1 = 0x00;
InitUart();
// if(sequential_write_flash_in_one_sector(DEBUG_Data_Memory_Begin_Sector_addr, USED_BYTE_QTY_IN_ONE_SECTOR, Test_array_total))
// display_OK_LED();
// else
// display_ERROR_LED();
if(write_flash_with_protect_in_one_sector(DEBUG_Data_Memory_Begin_Sector_addr+0x3, USED_BYTE_QTY_IN_ONE_SECTOR-0x30, Test_array_total))
display_OK_LED();
else
display_ERROR_LED();
while(1);
}
/*----------------------------
关闭IAP
----------------------------*/
void IapIdle()
{
IAP_CONTR = 0; //关闭IAP功能
IAP_CMD = 0; //清除命令寄存器
IAP_TRIG = 0; //清除触发寄存器
IAP_ADDRH = 0x80; //将地址设置到非IAP区域
IAP_ADDRL = 0;
}
/*----------------------------
从ISP/IAP/EEPROM区域读取一字节
----------------------------*/
BYTE IapReadByte(WORD addr)
{
BYTE dat; //数据缓冲区
IAP_CONTR = ENABLE_IAP; //使能IAP
IAP_CMD = CMD_READ; //设置IAP命令
IAP_ADDRL = addr; //设置IAP低地址
IAP_ADDRH = addr >> 8; //设置IAP高地址
IAP_TRIG = 0x5a; //写触发命令(0x5a)
IAP_TRIG = 0xa5; //写触发命令(0xa5)
_nop_(); //等待ISP/IAP/EEPROM操作完成
dat = IAP_DATA; //读ISP/IAP/EEPROM数据
IapIdle(); //关闭IAP功能
return dat; //返回
}
/*----------------------------
写一字节数据到ISP/IAP/EEPROM区域
----------------------------*/
void IapProgramByte(WORD addr, BYTE dat)
{
IAP_CONTR = ENABLE_IAP; //使能IAP
IAP_CMD = CMD_PROGRAM; //设置IAP命令
IAP_ADDRL = addr; //设置IAP低地址
IAP_ADDRH = addr >> 8; //设置IAP高地址
IAP_DATA = dat; //写ISP/IAP/EEPROM数据
IAP_TRIG = 0x5a; //写触发命令(0x5a)
IAP_TRIG = 0xa5; //写触发命令(0xa5)
_nop_(); //等待ISP/IAP/EEPROM操作完成
IapIdle();
}
/*----------------------------
扇区擦除
----------------------------*/
void IapEraseSector(WORD addr)
{
IAP_CONTR = ENABLE_IAP; //使能IAP
IAP_CMD = CMD_ERASE; //设置IAP命令
IAP_ADDRL = addr; //设置IAP低地址
IAP_ADDRH = addr >> 8; //设置IAP高地址
IAP_TRIG = 0x5a; //写触发命令(0x5a)
IAP_TRIG = 0xa5; //写触发命令(0xa5)
_nop_(); //等待ISP/IAP/EEPROM操作完成
IapIdle();
}
/* 写数据进数据Flash存储器, 只在同一个扇区内写，不保留原有数据 */
/* begin_addr,被写数据Flash开始地址；counter,连续写多少个字节； array[]，数据来源 */
BYTE sequential_write_flash_in_one_sector(WORD begin_addr, WORD counter, BYTE array[])
{
WORD i = 0;
WORD in_sector_begin_addr = 0;
WORD sector_addr = 0;
/* 判是否是有效范围,此函数不允许跨扇区操作 */
if(counter > USED_BYTE_QTY_IN_ONE_SECTOR)
return ERROR;
in_sector_begin_addr = begin_addr & 0x01ff;
if((in_sector_begin_addr + counter) > USED_BYTE_QTY_IN_ONE_SECTOR)
return ERROR;
/* 擦除要修改/写入的扇区 */
IapEraseSector(begin_addr);
for(i=0; i<counter; i++)
{
/* 写一个字节 */
IapProgramByte(begin_addr, array[i]);
/* 比较对错 */
if (SendData(IapReadByte(begin_addr)) != array[i])
{
IapIdle();
return ERROR;
}
begin_addr++;
}
IapIdle();
return OK;
}
/* 写数据进数据Flash存储器(EEPROM), 只在同一个扇区内写，保留同一扇区中不需修改的数据 */
/* begin_addr,被写数据Flash开始地址；counter,连续写多少个字节； array[]，数据来源 */
BYTE write_flash_with_protect_in_one_sector(WORD begin_addr, WORD counter, BYTE array[])
{
WORD i = 0;
WORD in_sector_begin_addr = 0;
WORD sector_addr = 0;
WORD byte_addr = 0;
/* 判是否是有效范围,此函数不允许跨扇区操作 */
if(counter > USED_BYTE_QTY_IN_ONE_SECTOR)
return ERROR;
in_sector_begin_addr = begin_addr & 0x01ff;
/* 假定从扇区的第0个字节开始，到USED_BYTE_QTY_IN_ONE_SECTOR-1个字节结束,后面部分不用,程序易编写 */
if((in_sector_begin_addr + counter) > USED_BYTE_QTY_IN_ONE_SECTOR)
return ERROR;
/* 将该扇区数据 0 - (USED_BYTE_QTY_IN_ONE_SECTOR-1) 字节数据读入缓冲区保护 */
sector_addr = (begin_addr & 0xfe00);
byte_addr = sector_addr;
for(i = 0; i < USED_BYTE_QTY_IN_ONE_SECTOR; i++)
{
protect_buffer[i] = IapReadByte(byte_addr++);
}
/* 将要写入的数据写入保护缓冲区的相应区域,其余部分保留 */
for(i = 0; i < counter; i++)
{
protect_buffer[in_sector_begin_addr++] = array[i];
}
/* 擦除要修改/写入的扇区 */
IapEraseSector(sector_addr);
/* 将保护缓冲区的数据写入 Data Flash, EEPROM */
byte_addr = sector_addr;
for(i = 0; i< USED_BYTE_QTY_IN_ONE_SECTOR; i++)
{
/* 写一个字节 */
IapProgramByte(byte_addr, protect_buffer[i]);
/* 比较对错 */
if (SendData(IapReadByte(begin_addr)) != protect_buffer[i])
{
IapIdle();
return ERROR;
}
byte_addr++;
}
IapIdle();
return OK;
}
/*----------------------------
初始化串口
----------------------------*/
void InitUart()
{
SCON = 0x5a; //设置串口为8位可变波特率
#if URMD == 0
T2L = (65536 - (FOSC/4/BAUD));
T2H = (65536 - (FOSC/4/BAUD)) >> 8;
AUXR = 0x14; //T2为1T模式, 并启动定时器2
AUXR |= 0x01; //选择定时器2为串口1的波特率发生器
#elif URMD == 1
AUXR = 0x40; //定时器1为1T模式
TMOD = 0x00; //定时器1为模式0(16位自动重载)
TL1 = (65536 - (FOSC/4/BAUD));
TH1 = (65536 - (FOSC/4/BAUD)) >> 8;
TR1 = 1; //定时器1开始启动
#else
TMOD = 0x20; //设置定时器1为8位自动重装载模式
AUXR = 0x40; //定时器1为1T模式
TH1 = TL1 = (256 - (FOSC/32/BAUD));
TR1 = 1;
#endif
}
/*----------------------------
发送串口数据
----------------------------*/
BYTE SendData(BYTE dat)
{
while (!TI); //等待前一个数据发送完成
TI = 0; //清除发送标志
SBUF = dat; //发送当前数据
return dat;
}

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