有使用过AT45DB161D的朋友帮忙看看！

只看该作者 · 2012-8-2 10:43

很奇怪的，当写到地址为139920时，数据无法写入，每页是528字节，正好是265页开始处，无法写入，非常奇怪的，朋友们帮忙看看！

只看该作者 · 2012-8-2 10:53

这个怎么看啊

只看该作者 · 2012-8-2 10:59

会有这种情况发生吗？

只看该作者 · 2012-8-2 11:02

很奇怪的，当写到地址为139920时，数据无法写入，每页是528字节，正好是265页开始处，无法写入，非常奇怪的，朋友们帮忙看看！

//
#define OVERTIMES                                  200
#define PAGE_SIZE                                  528L
#define W_BUF_SIZE                               528L
#define R_BUF_SIZE                               528L
#define BLOCK_SIZE                               4224L

#define REG_STATUS                               0xD7
#define REG_WRITE_BUFF_1                         0x84
#define REG_BUFF_MAIN_1                            0x83
#define REG_ARRAY_READ                            0xE8
#define REG_PAGEERASE                            0x81
#define REG_BLOCKERASE                            0x50
#define REG_DEEPSLEEP                            0xB9
#define REG_RESUME_DEEPSLEEP                      0xAB

//PA.7
#define AT45DBXX_CS_L                            GPIOA_BSRR_bit.BR7 = 1
#define AT45DBXX_CS_H                            GPIOA_BSRR_bit.BS7 = 1
#define AT45DBXX_CS_OUT                            GPIOA_CRL_bit.MODE7 = 1 ;\
                                                GPIOA_CRL_bit.CNF7 = 0

//spi.c
extern void spi_io_init (void) ;
extern u8_t spi_read_byte (void) ;
extern void spi_write_byte (u8_t byte) ;

//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
static void at45dbxx_io_init (void)
{
spi_io_init () ;

//CS disable
AT45DBXX_CS_H ;
AT45DBXX_CS_OUT ;
}

static u8_t at45dbxx_wait (void)
{
u8_t status, try_cnt = OVERTIMES ;

do
{
      AT45DBXX_CS_L ;
      spi_write_byte (REG_STATUS) ;
      status = spi_read_byte () ;
      AT45DBXX_CS_H ;
      lib_delay_us (10) ;
}while ((!(status & BIT7)) && (--try_cnt)) ;

if (try_cnt)
      return TRUE ;
else
      return FALSE ;
}

static void at45dbxx_write_buf (u8_t *cmd, u8_t *buf, u16_t buf_len)
{
u8_t i ;

AT45DBXX_CS_L ;

for (i=0; i<4; i++)
      spi_write_byte (*cmd++) ;

while (buf_len -- > 0)
      spi_write_byte (*buf++) ;

AT45DBXX_CS_H ;
}

static void at45dbxx_read_buf (u8_t *cmd, u8_t *buf, u16_t buf_len)
{
u8_t i ;

AT45DBXX_CS_L ;

for (i=0; i<4; i++)
      spi_write_byte (*cmd++) ;

for (i=0; i<4; i++)
      spi_write_byte (0x00) ;

while (buf_len -- > 0)
      *buf++ = spi_read_byte () ;

AT45DBXX_CS_H ;
}

static u8_t at45dbxxMainMemoryToBufferTransfert (u8_t page)
{
AT45DBXX_CS_L ;

spi_write_byte (0x53) ;
spi_write_byte ((page >> 6) & 0x7F) ;
spi_write_byte ((page << 2) & 0xFC) ;
spi_write_byte (0x00) ;

AT45DBXX_CS_H ;

if (at45dbxx_wait () != TRUE)
      return FALSE ;

return TRUE ;
}

//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
u8_t flash_read_buf (u32_t addr, u8_t *p_buf, u16_t len)
{
u8_t cmd[4] ;
u16_t page, adrInPage ;

at45dbxx_io_init () ;

if (at45dbxx_wait () != TRUE)
      goto fail_exit ;

page = addr / PAGE_SIZE ;
adrInPage = addr % PAGE_SIZE ;

//
cmd[0] = REG_ARRAY_READ ;
cmd[1] = ((u16_t)(page) >> 6) & 0x7F ;
cmd[2] = ((u16_t)(page) << 2) & 0xFC ;
cmd[2] |= (((u16_t)(adrInPage) >> 8) & 0x03) ;
cmd[3] = (u16_t)(adrInPage) & 0xFF ;

at45dbxx_read_buf (cmd, p_buf, len) ;

FLAG_ERR_FLASH = FALSE ;
return TRUE ;

fail_exit:
FLAG_ERR_FLASH = TRUE ;
return FALSE ;
}

u8_t flash_write_buf (u32_t addr, u8_t *p_buf, u16_t len)
{
u8_t cmd[4] ;
u16_t w_len, page, adrInPage ;

at45dbxx_io_init () ;

if (at45dbxx_wait () != TRUE)
      goto fail_exit ;

while (len > 0)
{
      page = addr / PAGE_SIZE ;
      adrInPage = addr % PAGE_SIZE ;

      if (adrInPage)
      {
         if (at45dbxxMainMemoryToBufferTransfert (page) != TRUE)
            return FALSE ;

         w_len = PAGE_SIZE - (addr % PAGE_SIZE) ;
         if (len < w_len)
            w_len = len ;
      }
      else
      {
         if (len <= PAGE_SIZE)
            w_len = len ;
         else
            w_len = PAGE_SIZE ;
      }

      //write buffer 1
      cmd[0] = 0x84 ;
      cmd[1] = 0x00;
      cmd[2] = (adrInPage >> 8) ;
      cmd[3] = adrInPage & 0xFF ;
      at45dbxx_write_buf (cmd, p_buf, w_len) ;

      if (at45dbxx_wait () != TRUE)
         goto fail_exit ;

      //write mainPage 1
      cmd[0] = 0x83 ;
      cmd[1] = (page >> 6) ;
      cmd[2] = (page << 2) ;
      cmd[3] = 0x00 ;
      at45dbxx_write_buf (cmd, NULL, 0) ;

      lib_delay_ms (40) ;

      if (at45dbxx_wait () != TRUE)
         goto fail_exit ;

      p_buf += w_len ;
      len -= w_len ;
      addr += w_len ;
}

FLAG_ERR_FLASH = FALSE ;
return TRUE ;

fail_exit:
FLAG_ERR_FLASH = TRUE ;
return FALSE ;
}

只看该作者 · 2012-8-2 14:28

这个系列的IC驱动有开源的。印象中ATMEL的网站上就有提供。

有使用过AT45DB161D的朋友帮忙看看！

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