超级电200
01-14 17:20
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#include "reg52.h"
#include "main.h"
sbit FLASH_CLK = P2^5;
sbit FLASH_DI = P2^6;
sbit FLASH_DO = P2^7;
sbit FLASH_CS = P2^4;
#define WREN 0x06
#define WRDI 0x04
#define RDID 0x9f
#define RDSR 0x05
#define READ 0x03
#define FAST_READ 0x0B
#define PAGE_WRITE 0x0A
#define PAGE_PROGRAM 0x02
#define PAGE_ERASE 0xDB
#define SECOTR_ERASE 0xD8
void FLASH_WriteByte(unsigned char inData);
unsigned char FLASH_ReadByte(void);
void FLASH_Init(void);
void FLASH_Write(unsigned long addr, unsigned char* p_value, unsigned char writebytes );
void FLASH_WriteByte(unsigned char inData)
{
unsigned char i;
for(i = 0x80; i > 0; i >>= 1)
{
FLASH_CLK = 0;
if( inData & i ) FLASH_DI = 1;
else FLASH_DI = 0;
FLASH_CLK = 1;
}
}
unsigned char FLASH_ReadByte(void)
{
unsigned char i;
unsigned char outData = 0;
for(i = 0x80; i > 0; i >>= 1)
{
FLASH_CLK = 1;
FLASH_CLK = 0;
if( FLASH_DO ) outData |= i;
}
return outData;
}
void FLASH_Init(void)
{
FLASH_CS = 1;
FLASH_CS = 0;
}
unsigned char FLASH_Register(void)
{
unsigned char result;
FLASH_CS = 0;
FLASH_WriteByte(RDSR);
result = FLASH_ReadByte();
FLASH_CS = 1;
return result;
}
void FLASH_WriteEnable(void)
{
FLASH_CS = 0;
FLASH_WriteByte(WREN);
FLASH_CS = 1;
}
void FLASH_WriteDisEnable(void)
{
FLASH_CS = 0;
FLASH_WriteByte(WRDI);
FLASH_CS = 1;
}
void FLASH_PageErase(unsigned long addr)
{
while(!( FLASH_Register() & 0x02 ))FLASH_WriteEnable();
FLASH_CS = 0;
FLASH_WriteByte(PAGE_ERASE);
FLASH_WriteByte((addr>>16)&0xff);
FLASH_WriteByte((addr>>8)&0xff);
FLASH_WriteByte(0);
FLASH_CS = 1;
while( FLASH_Register() & 0x01 );
FLASH_WriteDisEnable();
}
void FLASH_Write(unsigned long addr, unsigned char* p_value, unsigned char writebytes )
{
unsigned char i;
unsigned char frontPageCnt = 0;
unsigned char pageIndex = addr&0xff;
while(!( FLASH_Register() & 0x02 ))FLASH_WriteEnable();
FLASH_CS = 0;
FLASH_WriteByte(PAGE_WRITE);
FLASH_WriteByte((addr>>16)&0xff);
FLASH_WriteByte((addr>>8)&0xff);
FLASH_WriteByte(pageIndex);
if( writebytes > (256-pageIndex) )
{
frontPageCnt = 256-pageIndex;
}
else
{
frontPageCnt = writebytes;
}
for( i = 0; i < frontPageCnt; i++ )
{
FLASH_WriteByte(*p_value++);
}
FLASH_CS = 1;
while( FLASH_Register() & 0x01 );
FLASH_WriteDisEnable();
if( frontPageCnt == writebytes ) return;
addr++;
frontPageCnt = writebytes - frontPageCnt;
FLASH_WriteEnable();
FLASH_CS = 0;
FLASH_WriteByte(PAGE_WRITE);
FLASH_WriteByte((addr>>16)&0xff);
FLASH_WriteByte((addr>>8)&0xff);
FLASH_WriteByte(0);
for( i = 0; i < frontPageCnt; i++ )
{
FLASH_WriteByte(*p_value++);
}
FLASH_CS = 1;
while( FLASH_Register() & 0x01 );
FLASH_WriteDisEnable();
}
void FLASH_Read(unsigned long addr, unsigned char* p_value, unsigned char readbytes )
{
unsigned char i;
FLASH_CS = 0;
FLASH_WriteByte(READ);
FLASH_WriteByte((addr>>16)&0xff);
FLASH_WriteByte((addr>>8)&0xff);
FLASH_WriteByte(addr&0xff);
for(i = 0; i < readbytes; i++)
{
*p_value++ = FLASH_ReadByte();
}
FLASH_CS = 1;
}
void main(void)
{
unsigned int i;
unsigned char failCnt = 0;
unsigned char test[101];
unsigned char result = 0;
for(i=0;i<10000;i++);
FLASH_Init();
while(1){
result++;
FLASH_PageErase(0);
for( i = 0; i < 101; i++ )
{
test[i] = result;
}
FLASH_Write( 0, test, 101 );
FLASH_Read( 0, test, 101 );
if( result != test[0] )
{
failCnt++;
}
if( result > 100 )
{
result = 0;
}
}
}复制代码上程序