新唐FAQ问答汇总【来自牛卧堂】

只看该作者 · 2015-12-4 16:56

haolaishi 发表于 2014-11-26 22:48
问：N79E815芯片中dataflsh存储的数据，再次烧写falsh时候将被全部清除。有没有办法不被清
答：目前N79E81X ...

大哥，你可以帮我看一下我下面这段ISP断电保存的程序是哪里出错了吗？一直没有办法工作

bit EA_Save_bit = 1;

void Clear_BOF(void)
{
EA_Save_bit = EA;
EA = 0;
TA = 0xAA;
TA = 0x55;
PMCR &= 0xF3;
TA = 0xAA;
TA = 0x55;
CHPCON = 0x3B;
EA = EA_Save_bit;
}
//-----------------------------------------------------------------------------------------------------------
void Enable_ISP_Mode(void)
{
/* Enable ISP  */
ISPCN=0x30;
EA_Save_bit = EA;
EA = 0;
TA = 0xAA;
TA = 0x55;
CHPCON |= 0x01;
EA = 1;
Trigger_ISP();
}
//-----------------------------------------------------------------------------------------------------------
void Disable_ISP_Mode(void)
{
/* Disable ISP */
ISPCN=0x30;
Trigger_ISP();
EA_Save_bit = EA;
EA = 0;
TA = 0xAA;
TA = 0x55;
CHPCON &= 0xFE;
EA = 1;//EA_Save_bit;
}
//-----------------------------------------------------------------------------------------------------------
void Trigger_ISP(void)
{
EA_Save_bit = EA;
EA = 0;
EA = 0;
TA = 0xAA;
TA = 0x55;
ISPTRG |= 0x01;//start
EA = 1;//EA_Save_bit;
}
//-----------------------------------------------------------------------------------------------------------
void Erase_DATA(void)
{
static uint u16Count;

Enable_ISP_Mode();
ISPCN = ERASE_ALL_DATA;

for(u16Count=96;u16Count<128;u16Count++)
{
      ISPAL = LOBYTE(u16Count*128);             // 96*128=12288=0x3000
      ISPAH = HIBYTE(u16Count*128);             // 每128字节/一页
Trigger_ISP();
}
Disable_ISP_Mode();
}
//-----------------------------------------------------------------------------------------------------------
void Read_DATA(void)
{
uchar j = 0;
Enable_ISP_Mode();
ISPAL = 0x00;
ISPAH = 0x30;
ISPCN = FLASH_READ_DATA;
if(j < 4)
{
      Trigger_ISP();
status_buff.flash_value[j] = ISPFD;

      ISPAL++;
      if(ISPAL == 0)
      {
         ISPAH++;
      }
}
j++;
Disable_ISP_Mode();
}
//-----------------------------------------------------------------------------------------------------------
void Program_DATA(void)
{
uchar j = 0;
Enable_ISP_Mode();
ISPAL = 0x00;
ISPAH = 0x30;
ISPCN = BYTE_PROGRAM_DATA;
if(j < 4)
{
   ISPFD = status_buff.flash_value[j];
      Trigger_ISP();

      ISPAL++;
      if(ISPAL == 0)
      {
         ISPAH++;
      }
}
j++;
Disable_ISP_Mode();
}