这个程序是按照张教主的改了一点点.
但是不能用啊.我是用在MC9S08SG8上的.
一运行,程序就会死机,总线频率发生频繁变化.后重启.
我主要是拿来用,在底层操作也不熟.请张教主指点.请大家帮我一下.
看一看这个程序哪里出了问题的.
/* This is a linker parameter file for the mc9s08sg8 */
NAMES END /* CodeWarrior will pass all the needed files to the linker by command line. But here you may add your own files too. */
SEGMENTS /* Here all RAM/ROM areas of the device are listed. Used in PLACEMENT below. */
EEPROM = READ_ONLY 0xE000 TO 0xE3FF;
Z_RAM = READ_WRITE 0x0080 TO 0x00FF;
RAM = READ_WRITE 0x0100 TO 0x027F;
ROM = READ_ONLY 0xE400 TO 0xFFAD;
/* INTVECTS = READ_ONLY 0xFFC0 TO 0xFFFF; Reserved for Interrupt Vectors */
END
PLACEMENT /* Here all predefined and user segments are placed into the SEGMENTS defined above. */
DEFAULT_RAM /* non-zero page variables */
INTO RAM;
_PRESTART, /* startup code */
STARTUP, /* startup data structures */
ROM_VAR, /* constant variables */
STRINGS, /* string literals */
VIRTUAL_TABLE_SEGMENT, /* C++ virtual table segment */
DEFAULT_ROM,
COPY /* copy down information: how to initialize variables */
INTO ROM;
_DATA_ZEROPAGE, /* zero page variables */
MY_ZEROPAGE INTO Z_RAM;
END
STACKSIZE 0x50
VECTOR 0 _Startup /* Reset vector: this is the default entry point for an application. */
#include"DSD.h"
#include"MC9S08SG8.h"
#define SIZE_FUNC_RAM 50 //擦写在RAM中的空间.
//函数类型声明
void WriteEE(byte*, byte*, byte); //写一串数据字节到E2
void EraseEE(byte*); //擦除E2数据页
#pragma CONST_SEG EEPROM
const byte EE_Data[1023]; //保留一页Flash空间作为E2模拟
//==============================================================
// Following data are declared in the direct addressing area
// for fast access (address < 0x100)
//==============================================================
#pragma DATA_SEG SHORT MY_ZEROPAGE //direct addressing data segment
byte testData[8] = "12345678"; //测试时被写入E2的数据
//==============================================================
// Following data are declared in the common data area
// (address >= 0x100)
//==============================================================
#pragma DATA_SEG DEFALUT //default data segment
//MCU初始化子程序
void MCU_init(void)
{
SOPT1 = 0x00;
SOPT2 = 0x00;
ICSC1_CLKS = 0;
ICSC1_IREFS = 1;
ICSC1_RDIV = 0;
ICSC2_BDIV = 2;
ICSTRM = 0xB5; //自调整 0x96
// 配置时钟频率
FCDIV_PRDIV8 = 0;
FCDIV_DIV = 19; //set FCLK base on 8MHz Fbus 200K
}
//下面这段代码是专门为启动Flash编程命令然后查询编程结束标志
//在执行之前必须被拷贝到RAM区（任意地址），然后从RAM中运行
//=============================================================================
byte ExecEePrgCmd(byte cmd)
{
FCMD = cmd; //set command
FSTAT_FCBEF = 1; //command launched and FCBEF cleared
_asm NOP; //wait at least 4 nop
_asm NOP;
_asm NOP;
_asm NOP;
if(FSTAT_FPVIOL || FSTAT_FACCERR) //exit if encounter any error
{
return(0); //return with error flag
}
while(!FSTAT_FCCF) //wait for FCCF=1
{
__RESET_WATCHDOG();
}
return(1); //return with success
}
//定义上面一段代码的长度，编译后不超过50字节
//写一串数据到模拟E2区，大部分代码是在Flash区内运行的，只是上面关键的一小段代码必须拷贝到RAM区才能运行
void WriteEE(byte* eeAddr, byte* datBuff, byte byteCount)
{
byte i;
byte *srcPtr;
byte codeBuff[SIZE_FUNC_RAM]; //buffer size is slightly bigger than the length of ExecEePrgCmd function
//这里示范的是将关键代码拷贝到局部变量（堆栈）区。用户可以将代码拷贝到静态数据区，一样使用
//Copy ExecEePrgCmd code into RAM
srcPtr = (byte*)ExecEePrgCmd; //function entry in Flash
for(i=0;i<SIZE_FUNC_RAM;i++)
{ //do byte copy
codeBuff = srcPtr;
}
FSTAT_FACCERR = 1; //clear any pending Flash error flag
while (byteCount)
{
*eeAddr++ = *datBuff++; //latch data byte and memory address
Disable_Interrupts; //禁止任何中断，很重要！！！
((byte (*)(byte))codeBuff)(0x20); //编程一个字节 在前面加 (void)就没有了报警 -C1420
Enable_Interrupts;
byteCount--;
}
}
//擦除E2页面，原理基本同上//=============================================================================
// Erase a page of EEPROM (Flash emulated)
//=============================================================================
void EraseEE(byte* eeAddr)
{
byte i;
byte *srcPtr;
byte codeBuff[SIZE_FUNC_RAM]; //buffer size is slightly bigger than the length of ExecEePrgCmd function
//Copy ExecEePrgCmd code into RAM
srcPtr = (byte*)ExecEePrgCmd; //function entry in Flash
for(i = 0; i < SIZE_FUNC_RAM; i++) //do byte copy
{
codeBuff = srcPtr;
}
FSTAT_FACCERR = 1; //clear any pending Flash error flag
*eeAddr = 0; //latch memory address
Disable_Interrupts;
((byte (*)(byte))codeBuff)(0x40); //do page erase在前面加 (void)就没有了报警 -C1420
Enable_Interrupts;
}
//主程序入口
void main(void)
{
MCU_init();
Enable_Interrupts;
EraseEE((byte*)EE_Data);
WriteEE((byte*)EE_Data, testData, 8);
for(;;)
{
_asm NOP
_asm NOP
__RESET_WATCHDOG(); // feeds the dog
}
}
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