📄 nf.c
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}
/*F**************************************************************************
* NAME: nf_write_byte
*----------------------------------------------------------------------------
* PARAMS:
* b: data to write
*
* RETURN:
* write status: OK: write done
* KO: write not done
*
*----------------------------------------------------------------------------
* PURPOSE:
* Low level memory write function
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
bit nf_write_byte (Byte b)
{
Byte pdata *ptr = gl_buffer;
if (nf_busy)
{
nf_busy = FALSE;
if (!gl_cpt_page) /* if we are at the beginning of a new page */
{
/* if there is a block change */
if ( !(gl_ptr_mem & 0x3F) )
{
/* If previous block have to de deleted */
if (nf_block_used)
{
Nf_CS_EVEN();
nf_block_erase((Uint32)(nf_block_to_be_deleted_even) << 5);
Nf_CS_ODD();
nf_block_erase((Uint32)(nf_block_to_be_deleted_odd) << 5);
}
/* increase the main buffer index */
nf_gl_buf_idx++;
/* if zone change */
if (nf_gl_buf_idx >= block_max)
{
nf_write_open(gl_ptr_mem);
}
else
{
/* if the block in the buffer is already assign, then invert it with a spare block */
if ( !(buf[nf_gl_buf_idx].even.w & 0x8000))
{
if ((buf_free[nf_gl_buf_free_idx].even & 0x7FFF) == lut_block[nf_zone])
{
nf_gl_buf_free_idx++;
if (nf_gl_buf_free_idx >= nf_spare_block)
{
nf_gl_buf_free_idx = 0;
}
}
/* invert the block and assign the next block to be deleted */
nf_block_to_be_deleted_even = buf[nf_gl_buf_idx].even.w;
nf_block_to_be_deleted_odd = buf[nf_gl_buf_idx].odd.w;
buf[nf_gl_buf_idx].even.w = buf_free[nf_gl_buf_free_idx].even & 0x7FFF;
buf[nf_gl_buf_idx].odd.w = buf_free[nf_gl_buf_free_idx].odd & 0x7FFF;
buf_free[nf_gl_buf_free_idx].even = nf_block_to_be_deleted_even | 0x8000;
buf_free[nf_gl_buf_free_idx].odd = nf_block_to_be_deleted_odd | 0x8000;
/* block have to be deleted */
nf_block_used = TRUE;
/* increase the spare buffer index */
nf_gl_buf_free_idx++;
if ((nf_gl_buf_free_idx++) >= nf_spare_block )
{
nf_gl_buf_free_idx = 0;
}
}
else /* The block is not assigned. Nothing to do */
{
buf[nf_gl_buf_idx].even.w &= 0x7FFF;
nf_block_used = FALSE;
}
/* update the max index buffer */
if (nf_gl_buf_idx > nf_gl_buf_idx_max)
nf_gl_buf_idx_max = nf_gl_buf_idx;
/* Update current physical sector */
nf_current_physical_sector_addr_even = (Uint32)(buf[nf_gl_buf_idx].even.w) << 5;
nf_current_physical_sector_addr_odd = (Uint32)(buf[nf_gl_buf_idx].odd.w) << 5;
/* increase the logical block */
nf_logical_block++;
/* calculate the redundant block address */
nf_calc_logical_block();
}
nf_parity_bit = NF_EVEN;
}
}
}
gl_buffer[(gl_cpt_page & 0xFF)] = b; /* Save data in gl_buffer */
gl_cpt_page++; /* Increase internal page counter */
if (gl_cpt_page == 256) /* First 256 bytes */
{
if (nf_parity_bit == NF_ODD) /* Select Nand Flash 1/2 */
{
Nf_active_ODD();
Nf_wait_busy_odd();
Nf_write_open_A_area_odd(nf_current_physical_sector_addr_odd, 0x00);
nf_download_buffer(); /* Download the buffer */
Nf_send_command_odd(NF_PAGE_PROGRAM_CMD); /* Send program command */
}
else
{
Nf_active_EVEN();
Nf_wait_busy_even();
Nf_write_open_A_area_even(nf_current_physical_sector_addr_even, 0x00);
nf_download_buffer(); /* Download the buffer */
Nf_send_command_even(NF_PAGE_PROGRAM_CMD); /* Send program command */
}
nf_busy = TRUE; /* Set busy flag */
}
else
{
if (gl_cpt_page == NF_DATA_SIZE) /* last 256 bytes */
{
if (nf_parity_bit == NF_ODD)
{
Nf_active_ODD();
Nf_wait_busy_odd();
Nf_write_open_B_area_odd(nf_current_physical_sector_addr_odd, 0x00);
nf_download_buffer();
nf_update_spare_data();
Nf_send_command_odd(NF_PAGE_PROGRAM_CMD);
nf_current_physical_sector_addr_odd++;
}
else
{
Nf_active_EVEN();
Nf_wait_busy_even();
Nf_write_open_B_area_even(nf_current_physical_sector_addr_even, 0x00);
nf_download_buffer();
nf_update_spare_data();
Nf_send_command_even(NF_PAGE_PROGRAM_CMD);
nf_current_physical_sector_addr_even++;
}
nf_busy = TRUE;
gl_ptr_mem++;
nf_parity_bit = ~nf_parity_bit;
gl_cpt_page = 0;
}
}
return OK;
}
/*F**************************************************************************
* NAME: nf_write_sector
*----------------------------------------------------------------------------
* PARAMS:
* global: gl_ptr_mem
*
* return:
* write status: OK: write done
* KO: write not done
*----------------------------------------------------------------------------
* PURPOSE:
* This function is an optimized function that writes 512 bytes from USB
* controller to NF card
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
bit nf_write_sector (Uint16 nb_sector)
{
Byte j;
do
{
if (nf_busy)
{
nf_busy = FALSE;
if ( !(gl_ptr_mem & 0x3F) ) /* if there is a block change */
{
if (nf_block_used) /* if previous block have to de deleted */
{
Nf_CS_EVEN();
nf_block_erase((Uint32)(nf_block_to_be_deleted_even) << 5);
Nf_CS_ODD();
nf_block_erase((Uint32)(nf_block_to_be_deleted_odd) << 5);
}
nf_gl_buf_idx++; /* increase the main buffer index */
if (nf_gl_buf_idx >= block_max) /* if zone change */
{
nf_write_open(gl_ptr_mem); /* update the main buffer */
}
else /* don't change the buffer */
{
/* if the block in the buffer is already assign, then invert it with a spare block */
if ( !(buf[nf_gl_buf_idx].even.w & 0x8000))
{
if ((buf_free[nf_gl_buf_free_idx].even & 0x7FFF) == lut_block[nf_zone])
{
nf_gl_buf_free_idx++;
if (nf_gl_buf_free_idx >= nf_spare_block)
{
nf_gl_buf_free_idx = 0;
}
}
/* invert the block and assign the next block to be deleted */
nf_block_to_be_deleted_even = buf[nf_gl_buf_idx].even.w;
nf_block_to_be_deleted_odd = buf[nf_gl_buf_idx].odd.w;
buf[nf_gl_buf_idx].even.w = buf_free[nf_gl_buf_free_idx].even & 0x7FFF;
buf[nf_gl_buf_idx].odd.w = buf_free[nf_gl_buf_free_idx].odd & 0x7FFF;
buf_free[nf_gl_buf_free_idx].even = nf_block_to_be_deleted_even | 0x8000;
buf_free[nf_gl_buf_free_idx].odd = nf_block_to_be_deleted_odd | 0x8000;
nf_block_used = TRUE; /* block have to be deleted */
nf_gl_buf_free_idx++; /* increase the spare buffer index */
if ((nf_gl_buf_free_idx++) >= nf_spare_block )
{
nf_gl_buf_free_idx = 0;
}
}
else /* The block is not assigned. Nothing to do */
{
buf[nf_gl_buf_idx].even.w &= 0x7FFF;
buf[nf_gl_buf_idx].odd.w &= 0x7FFF;
nf_block_used = FALSE;
}
if (nf_gl_buf_idx > nf_gl_buf_idx_max) /* update the max index buffer */
nf_gl_buf_idx_max = nf_gl_buf_idx;
/* Update current physical sector */
nf_current_physical_sector_addr_even = (Uint32)(buf[nf_gl_buf_idx].even.w) << 5;
nf_current_physical_sector_addr_odd = (Uint32)(buf[nf_gl_buf_idx].odd.w) << 5;
nf_logical_block++; /* increase the logical block */
nf_calc_logical_block(); /* calculate the redundant block address */
}
nf_parity_bit = NF_EVEN;
}
}
if (nf_parity_bit == NF_ODD)
{
Nf_active_ODD();
Nf_wait_busy_odd();
Nf_write_open_A_area_odd(nf_current_physical_sector_addr_odd, 0x00);
for (j = 8; j != 0; j--)
{
while (!Usb_rx_complete()); /* wait end of reception */
Nf_wr_byte_odd(Usb_read_byte()); /* write 64 bytes to card */
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Nf_wr_byte_odd(Usb_read_byte());
Usb_clear_RXOUT_PP(); /* usb read acknowledgement */
}
nf_current_physical_sector_addr_odd++;
nf_update_spare_data();
Nf_send_command_odd (NF_PAGE_PROGRAM_CMD);
}
else
{
Nf_active_EVEN();⌨️ 快捷键说明
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