C:/PIC/OpenSSM/config.c

説明を見る。

/**************************************************************************************************
    Title           : Configuration Save / Load Interface
    Programmer      : Yosuke FURUSAWA.
    Copyright       : Copyright (C) 2010 Yosuke FURUSAWA.
    License         : 4-clause BSD License
    Since           : 2010/07/03

    Filename        : config.c
    Last up date    : 2010/08/31
    Kanji-Code      : Shift-JIS
    TAB Space       : 4
**************************************************************************************************/


/*================================================================================================
ヘッダファイルをインクルード
=================================================================================================*/
#include <p24FJ64GA002.h>

#include "types.h"
#include "table.h"

#include "libeeprom.h"
#include "libuart.h"
#include "libvideo.h"

#include "ssm.h"
#include "main.h"
#include "extmeter.h"
#include "screen.h"


#include "config.h"


/*================================================================================================
マクロ定義
=================================================================================================*/


/*================================================================================================
構造体
=================================================================================================*/
typedef struct CONFIG {
    void *ptr;
    unsigned char size;
} CONFIG_T;
typedef CONFIG_T* pCONFIG_T;


/*================================================================================================
グローバル変数
=================================================================================================*/
/* 保存対象を設定する */
static const CONFIG_T config[] = {
    { &extmeter,            sizeof(EXTMETER_T),     },
    { &screen,              sizeof(SCREEN_T),       },
    { &ssm,                 sizeof(SSM_T),          },
//  { &ntsc,                sizeof(NTSC_T),         },      /* 問題があったとき表示されなくなる */
    { NULL,                 0x00,                   },
};


/*================================================================================================
プロトタイプ宣言
=================================================================================================*/
static  BOOL CONFIG_write_and_verify(const unsigned int ptr, const unsigned char data);
static  unsigned int CONFIG_make_checksum(void);
static  unsigned int CONFIG_read_checksum(void);


/**************************************************************************************************
初期化
**************************************************************************************************/
BOOL CONFIG_init(void)
{
    return(TRUE);
}


/**************************************************************************************************
保存する
---------------------------------------------------------------------------------------------------
復帰処理が面倒なので、何かあったら WDTリセットさせる
**************************************************************************************************/
BOOL CONFIG_save(void)
{
    unsigned char *target_ptr;
    unsigned int i, j, eeprom_ptr, checksum;

    eeprom_ptr = 0;

    /* CONFIGリストの処理 */
    for(i = 0; config[i].size != 0; i++){
        ClrWdt();
        target_ptr = config[i].ptr;

        /* 保存対象の構造体を書き込む */
        for(j = 0; j < config[i].size; j++){
            while(!CONFIG_write_and_verify(eeprom_ptr, *target_ptr));
            target_ptr++;
            eeprom_ptr++;
        }
    }

    /* チェックサムの記録 */
    checksum = CONFIG_make_checksum();
    while(!CONFIG_write_and_verify(eeprom_ptr, (checksum >> 8)));
    eeprom_ptr++;
    while(!CONFIG_write_and_verify(eeprom_ptr, (checksum     )));

    return(TRUE);
}


/**************************************************************************************************
読み込む
---------------------------------------------------------------------------------------------------
復帰処理が面倒なので、何かあったら WDTリセットさせる
**************************************************************************************************/
BOOL CONFIG_load(void)
{
    unsigned char *target_ptr;
    unsigned int i, j, eeprom_ptr, checksum, verify, buf;

    eeprom_ptr = 0;

    /* チェックサムを確認する */
    checksum = CONFIG_make_checksum();
    verify   = CONFIG_read_checksum();

    /* チェックサムが異なるときはエラーを返す */
    if(checksum != verify) return(FALSE);


    /* メモリに書き込む */
    for(i = 0; config[i].size != 0; i++){
        ClrWdt();
        target_ptr = config[i].ptr;

        /* 保存対象の構造体を読込 */
        for(j = 0; j < config[i].size; j++){
            while((buf = EEPROM_read(eeprom_ptr)) == -1);
            *target_ptr = buf;
            target_ptr++;
            eeprom_ptr++;
        }
    }



    return(TRUE);
}


/**************************************************************************************************
データを覗く
**************************************************************************************************/
void CONFIG_dump_config(void)
{
    unsigned char *ptr;
    unsigned int i, j;

    for(i = 0; config[i].size != NULL; i++){
        ptr = config[i].ptr;

        UART1_puthex(i);
        UART1_puthex(config[i].size);
        UART1_putch(' ');

        for(j = 0; j < config[i].size; j++){
            ClrWdt();
            UART1_puthex(*ptr);
            UART1_putch(' ');
            ptr++;
            while(UART1_get_sendbuf() < 10);
        }

        UART1_putch('¥r');
        UART1_putch('¥n');
    }

    return;
}


/*-------------------------------------------------------------------------------------------------
ベリファイ付書込
---------------------------------------------------------------------------------------------------
復帰処理が面倒なので、何かあったら WDTリセットさせる
-------------------------------------------------------------------------------------------------*/
static  BOOL CONFIG_write_and_verify(const unsigned int ptr, const unsigned char data)
{
    int buf;

    do {
        EEPROM_write(ptr, data);
        buf = EEPROM_read(ptr);
    } while (buf != data || buf == -1);

    return(TRUE);
}


/*-------------------------------------------------------------------------------------------------
EEPROMのデータからチェックサムを生成する
-------------------------------------------------------------------------------------------------*/
static  unsigned int CONFIG_make_checksum(void)
{
    int buf;
    unsigned int i, j, eeprom_ptr, checksum;

    eeprom_ptr = 0;
    checksum = 0;

    for(i = 0; config[i].size != 0; i++){
        ClrWdt();

        for(j = 0; j < config[i].size; j++){
            while((buf = EEPROM_read(eeprom_ptr)) == -1);
            checksum += buf;
            eeprom_ptr++;
        }
    }

    return(checksum);
}


/*-------------------------------------------------------------------------------------------------
EEPROMのチェックサムを読み込む
-------------------------------------------------------------------------------------------------*/
static  unsigned int CONFIG_read_checksum(void)
{
    int buf;
    unsigned int i, eeprom_ptr, checksum;

    /* チェックサムのアドレスを求める */
    eeprom_ptr = 0;
    for(i = 0; config[i].size != 0; i++){
        eeprom_ptr += config[i].size;
    }

    /* チェックサムを読み込む */
    while((buf = EEPROM_read(eeprom_ptr)) == -1);
    checksum = buf << 8;
    eeprom_ptr++;
    while((buf = EEPROM_read(eeprom_ptr)) == -1);
    checksum = checksum + buf;

    return(checksum);
}