N76E003,内部Flash怎么写入数据

只看该作者 · 2017-7-18 01:54

本帖最后由 chenqinyao 于 2017-7-18 01:56 编辑

如下程序, 数据手册上的写入流程, 来操作没有任何变化, 读出来的是0xFF, 而不是0x55按BSP包里面的例程序也没任何变化, 写入0x55, 读出来也是0xFF
现在问一下, 写内部Flash要注意什么的吗, 还是还要哪里云设置

#include "N76E003.h"
#include "Function_Define.h"
#include "SFR_Macro.h"

//******************************************************************************
//  This code illustrates how to use IAP to make APROM 201h as a byte of
//  Data Flash when user code is executed in APROM.
//******************************************************************************
#define  PAGE_ERASE_AP 0x22
#define  BYTE_PROGRAM_AP  0x21

/*Data Flash, as part of APROM, is read by MOVC. Data Flash can be defined as
128-element array in “code” area from absolute address 0x0200             */

volatile unsigned char code Data_Flash[128] _at_ 0x0200;

Main (void)
{
TA = 0xAA;       //CHPCON is TA protected
TA = 0x55;
CHPCON |= 0x01;    //IAPEN = 1, enable IAP mode

TA = 0xAA;       //IAPUEN is TA protected
TA = 0x55;
IAPUEN |= 0x01;    //APUEN = 1, enable APROM update

IAPCN = PAGE_ERASE_AP; //Erase page 200h~27Fh
IAPAH = 0x02;
IAPAL = 0x00;
IAPFD = 0xFF;
TA = 0xAA;       //IAPTRG is TA protected
TA = 0x55;
IAPTRG |= 0x01;    //write ‘1’ to IAPGO to trigger IAP process

IAPCN = BYTE_PROGRAM_AP; // Program 201h with 55h
IAPAH = 0x02;
IAPAL = 0x01;
IAPFD = 0x55;
TA = 0xAA;
TA = 0x55;
IAPTRG |= 0x01;    //write ‘1’ to IAPGO to trigger IAP process

TA = 0xAA;       //IAPUEN is TA protected
TA = 0x55;
IAPUEN &= ~0x01;    //APUEN = 0, disable APROM update

TA = 0xAA;       //CHPCON is TA protected
TA = 0x55;
CHPCON &= ~0x01;    //IAPEN = 0, disable IAP mode

P0 = Data_Flash[1];    //Read content of address 200h+1

while(1);
}
上面  Data_Flash[1] 读出来的0xFF, 而不是0x55

只看该作者 · 2017-7-18 14:58

提供的有例子吧。

只看该作者 · 2017-7-18 15:13

复制

/*---------------------------------------------------------------------------------------------------------*/

/*                                                                                                         */

/* Copyright(c) 2016 Nuvoton Technology Corp. All rights reserved.                                         */

/*                                                                                                         */

/*---------------------------------------------------------------------------------------------------------*/



//***********************************************************************************************************

//  Nuvoton Technoledge Corp. 

//  Website: http://www.nuvoton.com

//  E-Mail : MicroC-8bit@nuvoton.com

//  Date   : Apr/21/2016

//***********************************************************************************************************



//***********************************************************************************************************

//  File Function: N76E003 APROM program DATAFLASH as EEPROM way 

//***********************************************************************************************************

#include <stdio.h>

#include "N76E003.h"

#include "Common.h"

#include "Delay.h"

#include "SFR_Macro.h"

#include "Function_Define.h"



bit BIT_TMP;



//-------------------------------------------------------------------------

UINT8 read_APROM_BYTE(UINT16 code *u16_addr)

{

        UINT8 rdata;

        rdata = *u16_addr>>8;

        return rdata;

}

//-------------------------------------------------------------------------





/*****************************************************************************************************************

write_DATAFLASH_BYTE :

user can copy all this subroutine into project, then call this function in main.

******************************************************************************************************************/                

void write_DATAFLASH_BYTE(UINT16 u16_addr,UINT8 u8_data)

{

        UINT8 looptmp=0,u8_addrl_r;

        unsigned char code *cd_longaddr;

        unsigned char xdata *xd_tmp;

        

//Check page start address

        u8_addrl_r = u16_addr;

        if (u8_addrl_r<0x80)

        {

                u8_addrl_r = 0;

        }

        else 

        {

                u8_addrl_r = 0x80;

        }

//Save APROM data to XRAM

        xd_tmp = 0x80;

        cd_longaddr = (u16_addr&0xff00)+u8_addrl_r;        

        while (xd_tmp !=0x100)

        {

                *xd_tmp = *cd_longaddr;

                looptmp++;

                xd_tmp++;

                cd_longaddr++;

        }

// Modify customer data in XRAM

        u8_addrl_r = u16_addr;

        if (u8_addrl_r<0x80)

        {

                xd_tmp = u8_addrl_r+0x80;

        }

        else

        {

                xd_tmp = u8_addrl_r+0;

        }

        *xd_tmp = u8_data;

//Erase APROM DATAFLASH page

                IAPAL = u16_addr;

                IAPAH = u16_addr>>8;

                IAPFD = 0xFF;

          set_IAPEN; 

                set_APUEN;

    IAPCN = 0x22;                 

                 set_IAPGO; 

//Save changed RAM data to APROM DATAFLASH

        u8_addrl_r = u16_addr;

        if (u8_addrl_r<0x80)

        {

                u8_addrl_r =0;

        }

        else

        {

                u8_addrl_r = 0x80;

        }

                xd_tmp = 0x80;

          IAPAL = u8_addrl_r;

    IAPAH = u16_addr>>8;

                set_IAPEN; 

                set_APUEN;

          IAPCN = 0x21;

                while (xd_tmp !=0xFF)

                {

                        IAPFD = *xd_tmp;

                        set_IAPGO;

                        IAPAL++;

                        xd_tmp++;

                }

                clr_APUEN;

                clr_IAPEN;

}        

/******************************************************************************************************************/                





void main (void) 

{

                UINT8 datatemp;

/* -------------------------------------------------------------------------*/

/*  Dataflash use APROM area                                                                                                                         */

/*        APROM 0x3800~0x38FF demo as dataflash                                                                                                     */

/* Please use Memory window key in C:0x3800 to check earse result                                          */              

/* -------------------------------------------------------------------------*/

        

//call write byte 

                write_DATAFLASH_BYTE (0x3881,0x55);

                write_DATAFLASH_BYTE (0x3882,0x56);

                write_DATAFLASH_BYTE (0x3855,0xaa);

                write_DATAFLASH_BYTE (0x3856,0x66);

//call read byte

                datatemp = read_APROM_BYTE(0x3882);

    while(1);

}

//-----------------------------------------------------------------------------------------------------------