R8C/13 Group APPLICATION NOTE Flash Rewrite Using EW1 Mode

R8C/13 Group
Flash Rewrite Using EW1 Mode (Data "FFh" Search)
5. Programming Code
The sample program is described below.
/************************************************************************************
* *
* File Name : main.c *
* Contents : Main program of the EW1 mode sample program R8C/13 Group *
* Copyright(C)2004, Renesas Technology Corp. *
* Copyright(C)2004, Renesas Solutions Corp. *
* All rights reserved. *
* Version : 1.10 *
* note : 0.01 : First version *
* : 1.10(2004.08.23): Comment is revised *
************************************************************************************/
#include "sfr_r813.h"
/* Definition of const data */
#define BLOCK_A ((unsigned char *)0x2000) /* 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 *)0x2fff) /* BLOCK B last address */
#define RECORD_PER_BLOCK 16 /* Record number per 1 block */
#define RECORD_SIZE 128 /* 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 */
/* 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);
/************************************************************************************
Name: main
Parameters: None
Returns: None
Description: User main
************************************************************************************/
void main(void){
static unsigned char write_data[RECORD_SIZE]; /* wirte data */
unsigned char result;
/*-----------------------------------------------
-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 */
cm16 = 0; /* Main clock = No division mode */
cm17 = 0;
cm06 = 0; /* CM16 and CM17 enable */
asm("nop"); /* Waiting for stable of oscillation */
asm("nop");
asm("nop");
asm("nop");
ocd2 = 0; /* Main clock change */
prc0 = 0; /* Protect on */
REJ05B0444-0110Z/Rev.1.10 August 2004 Page 19 of 25