闪存改写源代码
/***********************************************************************//* */
/*FILE :R5F212L.c */
/*This file is generated by Renesas Project Generator (Ver.4.12). */
/* //对一个块中的数据写入时，必须对整个的块擦除 */
/***********************************************************************/
#include "sfr_r82l.h"
/*Definition of const data */
#define BLOCK_A ((unsigned char *)0x2400) /*BLOCK A first address */
#define BLOCK_A_END ((unsigned char *)0x27ff) /*BLOCK A last address */
#define BLOCK_B ((unsigned char *)0x2800) /*BLOCK B first address */
#define BLOCK_B_END ((unsigned char *)0x2Bff) /*BLOCK B last address */
#define RECORD_PER_BLOCK 1 /*Record number per 1 block */
#define RECORD_SIZE 1024 /*Record size */
#define BLOCK_A_SELECT 0 /*Use BLOCK A */
#define BLOCK_B_SELECT 1 /*Use BLOCK B */
#define COMPLETE 0x00 /*FLASH write/erase complete*/
#define PROGRAM_ERR 0x01 /*FLASH data write error*/
#define ERASE_ERR 0x02 /*FLASH erase error */
/* Definition of RAM area */
unsigned char *write_addr; /*Write address */
unsigned char block_select; /*Block select flag */
unsigned char*write_addr_temp1;
unsigned char*write_addr_temp2;
/* Declaration of function prototype */
void write_address_init(void);
unsigned char flash_write(unsigned char *data);
unsigned char block_erase(unsigned char *ers_addr);
unsigned char data_write(unsigned char *write_data);
void make_data(unsigned char *write_data);
void main(void)
{
static unsigned char write_data; /*wirte data*/
unsigned char result;
unsigned int i = 0;
/*-----------------------------------------------
-Change on-chip oscillator clock to Main clock-
-------------------------------------------------*/
prc0 = 1; /* Protect off */
cm13 = 1; /* Xin Xout */
cm15 = 1; /* XCIN-XCOUT drive capacity select bit : HIGH */
cm05 = 0; /* Xin on */
while( i <= 255 ) i++; /* This setting is an example of waiting time for the */
/* oscillation stabilization. Please evaluate the time*/
/* for oscillation stabilization by a user. */
ocd2 = 0; /* Main clock change */
cm16 = 0; /* Main clock = No division mode */
cm17 = 0;
cm06 = 0; /* CM16 and CM17 enable */
prc0 = 0; /* Protect on */
/*-----------------------------------
- Initialize SFR -
-----------------------------------*/
prcr = 0x02;
pm1 = 0x01; /*Data block enable */
prcr = 0;
fmr4 = 0x00; /*Erase suspend mode disable*/
write_address_init(); /* Write address pointer initialize */
make_data(write_data); /*Make write data */
/*Data write*/
result = flash_write(write_data);
if( (result & PROGRAM_ERR) != 0 )
{
/*Program error */
}
if( (result & ERASE_ERR) != 0)
{
/*Erase error */
}
write_addr_temp1 = BLOCK_A;
write_addr_temp2 = BLOCK_A+10;
while(1)
{
}
}
/************************************************************************************
Name: make_data
Parameters:Record data pointer
Returns: None
Description: Make record data
************************************************************************************/
void make_data(unsigned char *data)
{
/*Make record data */
data=40;
data=50;
data=60;
}
/************************************************************************************
Name: write_address_init
Parameters:None
Returns: None
Description: Write address initialize
************************************************************************************/
void write_address_init(void)
{
int i;
int j;
write_addr = BLOCK_A; /*first sarch address */
/*Brank record check*/
while( write_addr <= BLOCK_B_END )
{
/*Record all ff check */
for(j = 0; j < RECORD_SIZE; j++)
{
if( write_addr != 0xff )
{
break;
}
}
if (j == RECORD_SIZE)
{
break;
}
write_addr = write_addr + RECORD_SIZE; /*Check address renew */
}
if(write_addr >= BLOCK_B_END+1)
{
/*if BLOCK A and BLOCK B are full then BLOCK A erase*/
block_erase(BLOCK_A);
write_addr = BLOCK_A;
block_select = BLOCK_A_SELECT;
}
else if(write_addr >= BLOCK_B)
{
/*Use BLOCK B */
block_select = BLOCK_B_SELECT;
}
else
{
/*Use BLOCK A */
block_select = BLOCK_A_SELECT;
}
}
/************************************************************************************
Name: flash_write
Parameters:Write record data
Returns: Result (Complete or program error or erase error)
Description: Initial setting of SFR registers
************************************************************************************/
unsigned char flash_write(unsigned char *data)
{
unsigned char result = COMPLETE;
if( data_write( data ) != COMPLETE )
{
/*Program error occurence */
result = result | PROGRAM_ERR; /*if program error */
}
/*Next write address update */
write_addr = write_addr + RECORD_SIZE;
if( (block_select == BLOCK_A_SELECT) && (write_addr > BLOCK_A_END) )
{
/*BLOCK A all write */
if( block_erase( BLOCK_B ) != COMPLETE )
{
/*Erase error occurence */
result = result | ERASE_ERR;
}
block_select = BLOCK_B_SELECT;
write_addr = BLOCK_B;
}
else if( (block_select == BLOCK_B_SELECT) && (write_addr > BLOCK_B_END) )
{
/*BLOCK B all write */
if( block_erase( BLOCK_A ) != COMPLETE )
{
/*Erase error occurence */
result = result | ERASE_ERR;
}
block_select = BLOCK_A_SELECT;
write_addr = BLOCK_A;
}
return result;
}
/************************************************************************************
Name: block_erase
Parameters:Erase block address
Returns: Erase result
Description: Block erase
************************************************************************************/
unsigned char block_erase(unsigned char *ers_addr){
unsigned char erase_result;
/*If use interrupt then clear i flag... */
/*asm("fclr i "); */
/*flash control register set*/
fmr0 = 0x01;
asm(" "); /*Description for preventing the abbreviation by optimization */
fmr0 = 0x03; /*CPU rewrite enable*/
fmr1 = 0x80;
asm(" "); /*Description for preventing the abbreviation by optimization */
fmr1 = 0x82; /*EW1 mode */
*ers_addr = 0x20; /*Block erase command write */
*ers_addr = 0xd0; /*Block erase command write */
while( fmr00 != 1 ); /*Ready check */
/*Erase status check*/
if( fmr07 == 1 ){
*ers_addr = 0x50; /*Clear stutus register */
erase_result = ERASE_ERR;
}else{
erase_result = COMPLETE;
}
/*flash control register reset */
fmr0 = 0x01; /*CPU rewrite disable */
/*If use interrupt then set i flag... */
/*asm("fset i "); */
returnerase_result;
}
/************************************************************************************
Name: data_write
Parameters:Record data address
Returns: Program result
Description: Record program
************************************************************************************/
unsigned char data_write( unsigned char *write_data )
{
unsigned char program_result = COMPLETE;
int i; /*loop counter */
/*If use interrupt then clear i flag... */
/*asm("fclr i "); */
/*flash control register set*/
fmr0 = 0x01;
asm(" "); /*Description for preventing the abbreviation by optimization */
fmr0 = 0x03; /*CPU rewrite enable*/
fmr1 = 0x80;
asm(" "); /*Description for preventing the abbreviation by optimization */
fmr1 = 0x82; /*EW1 mode */
for( i = 0; i < RECORD_SIZE; i++ )
{
write_addr = 0x40;
write_addr = write_data;
while( fmr00 != 1 ); /*Ready check */
/*Program status check */
if( fmr06 == 1 )
{
/*Program error */
*write_addr = 0x50; /*Clear stutus register */
program_result = PROGRAM_ERR;
break;
}
}
/*flash control register reset */
fmr0 = 0x01; /*CPU rewrite disable */
/*If use interrupt then set i flag... */
/*asm("fset i "); */
return program_result;
}
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