?? nf.c
字號:
}
#else
nf_mem_size = (NF_SECTOR_SIZE + 1) * 4 - 1 - MEM_RESERVED_SIZE;
#endif
nf_reserved_space_start = nf_mem_size + 1;
return OK;
}
/*F**************************************************************************
* NAME: nf_read_open
*----------------------------------------------------------------------------
* PARAMS:
* pos: address of the logic sector to read (size 512 bytes)
*
* return:
* Update memory for reading
*----------------------------------------------------------------------------
* PURPOSE:
* Low level memory read update
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
bit nf_read_open (Uint32 pos)
{
Uint16 physical_block;
Nf_CS_ON();
if (nf_lut_modified)
{
nf_close_write_session = FALSE;
nf_force_write_close();
nf_reassign_block();
nf_lut_modified = FALSE;
}
gl_ptr_mem = pos >> 2;
gl_cpt_page = (pos & 0x03) << 9 ;
nf_logical_block = (gl_ptr_mem >> NF_SHIFT_SECTOR_BLOCK);
nf_zone = nf_logical_block / 1000; /* Determinate logical zone */
nf_logical_block = nf_logical_block - (1000 * (Uint16)(nf_zone)); /* Logical block value */
gl_address = ((Uint32)(nf_lut_block[nf_zone])<<NF_SHIFT_SECTOR_BLOCK)+ /* lut address calculation */
((Uint32)(nf_lut_index[nf_zone]));
Nf_wait_busy();
Nf_send_command(NF_READ_CMD); /* open the look-up table */
Nf_send_address (nf_logical_block << 1); /* column address Byte 0 */
Nf_send_address (nf_logical_block >> 7); /* column address Byte 1 */
Nf_send_address ( ((Byte*)&gl_address)[3] ); /* row address Byte 0 */
Nf_send_address ( ((Byte*)&gl_address)[2] ); /* row address Byte 1 */
if (NF_5_CYCLE_ADDRESS_BIT) /* size of nf > 128Mbytes ? */
Nf_send_address ( ((Byte*)&gl_address)[1] ); /* row address Byte 2 */
Nf_send_command(NF_READ_CMD2);
nf_busy = TRUE; /* set busy flag */
nf_write_advanced = FALSE; /* desactive write optimization */
Nf_wait_busy();
((Byte*)&physical_block)[0] = Nf_rd_byte(); /* read the physical block number */
((Byte*)&physical_block)[1] = Nf_rd_byte();
/* Calculate the physical sector address */
nf_current_physical_sector_addr = ((Uint32)(physical_block) << NF_SHIFT_SECTOR_BLOCK) +
(((Byte*)&gl_ptr_mem)[3] & 0x3F);
Nf_CS_OFF();
return OK;
}
/*F**************************************************************************
* NAME: nf_read_close
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
* Low level memory read close
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void nf_read_close (void)
{
Nf_CS_OFF();
}
/*F*************************************************************************
* NAME: nf_read_byte
*---------------------------------------------------------------------------
* PARAMS:
*
* return:
* Data read from memory
*---------------------------------------------------------------------------
* PURPOSE:
* Low level memory read function
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
****************************************************************************/
Byte nf_read_byte (void)
{
Byte b;
if (nf_busy)
{
nf_busy = FALSE;
Nf_CS_ON();
Nf_wait_busy();
Nf_send_command(NF_READ_CMD);
Nf_send_address( 0x00);
Nf_send_address( ((Byte*)&gl_cpt_page)[0]);
Nf_send_address( ((Byte*)&nf_current_physical_sector_addr)[3]);
Nf_send_address( ((Byte*)&nf_current_physical_sector_addr)[2]);
if (NF_5_CYCLE_ADDRESS_BIT) /* Size of nf >= 128Mbytes ? */
Nf_send_address ( ((Byte*)&nf_current_physical_sector_addr)[1] ); /* Row address Byte 2 */
Nf_send_command(NF_READ_CMD2);
Nf_wait_busy();
b = Nf_rd_byte();
Nf_CS_OFF();
}
else
{
b = Nf_rd_byte();
}
gl_cpt_page++;
if ( ((Byte*)&gl_cpt_page)[0] == 0x08) /* Detection of the end of data page */
{
gl_ptr_mem++; /* new page */
gl_cpt_page=0; /* reset column */
if ( !(((Byte*)&gl_ptr_mem)[3] & 0x3F) )/* New block ? */
{
nf_read_open(gl_ptr_mem << 2);
}
else
{
((Byte*)&nf_current_physical_sector_addr)[3]++;
nf_busy = TRUE; /* Force read open command */
}
}
return b;
}
/*F**************************************************************************
* NAME: nf_read_sector
*----------------------------------------------------------------------------
* PARAMS:
* nb_sector: number of contiguous sector to read
* global: gl_ptr_mem
*
* return: OK read done
* KO read failure
*----------------------------------------------------------------------------
* PURPOSE:
* This function is an optimized function that writes nb-sector * 512 bytes
* from NF card to USB controller
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
* nb_sector always >= 1, can not be zero
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
bit nf_read_sector(Uint16 nb_sector)
{
Byte i;
bit begin_ping_pong;
begin_ping_pong = TRUE;
/* Start a transfert of nb_sector * 512 bytes */
do
{
Nf_CS_ON();
if (nf_busy) /* send a read command */
{
Nf_send_command(NF_READ_CMD);
Nf_send_address( 0x00);
Nf_send_address( ((Byte*)&gl_cpt_page)[0]);
Nf_send_address( ((Byte*)&nf_current_physical_sector_addr)[3]);
Nf_send_address( ((Byte*)&nf_current_physical_sector_addr)[2]);
if (NF_5_CYCLE_ADDRESS_BIT) /* Size of nf >= 128Mbytes ? */
Nf_send_address ( ((Byte*)&nf_current_physical_sector_addr)[1] ); /* Row address Byte 2 */
Nf_send_command(NF_READ_CMD2);
nf_busy = FALSE;
Nf_wait_busy();
}
for (i = 8; i != 0; i--) /* 8 * 64 bytes = 512 bytes */
{
Usb_write_byte(Nf_rd_byte()); /* read 64 bytes from card */
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
Usb_write_byte(Nf_rd_byte());
if (begin_ping_pong)
{
begin_ping_pong = FALSE;
}
else
{
while (!Usb_tx_complete()); /* wait end of transfer */
Usb_clear_TXCMPL(); /* ack transfer */
}
Usb_set_TXRDY(); /* start usb transfer */
}
((Byte*)&gl_cpt_page)[0] += 2;
if ( ((Byte*)&gl_cpt_page)[0] == 0x08) /* Detection of the end of data page */
{
gl_ptr_mem++; /* new page */
if ( !(((Byte*)&gl_ptr_mem)[3] & 0x3F) ) /* New block ? */
{
nf_read_open(gl_ptr_mem << 2);
}
else
{
((Byte*)&nf_current_physical_sector_addr)[3]++;
gl_cpt_page = 0;
nf_busy = TRUE;
}
}
nb_sector--;
Nf_CS_OFF();
}
while (nb_sector != 0);
while (!Usb_tx_complete()); /* wait end of last transfer */
Usb_clear_TXCMPL(); /* ack transfer */
return OK;
}
/*F**************************************************************************
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