UINT8 read_APROM_BYTE(unsigned int 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);
}
UINT8 read_APROM_BYTE(unsigned int code *u16_addr)
{
UINT8 rdata;
rdata = *(0x3800+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(0x82);
while(1);
}
前一个程序是例程 后面的是改动两个部分改动的就是读取的方法地址一个是直接赋值 另外一个由相加确定 为什么不能实现读取？？？
还有读取的时候的地址不能附变量吗？？？ |
楼主
标题置顶
标题高亮
