at45dbx_mem.c

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//_____  I N C L U D E S ___________________________________________________

#include "conf_access.h"


#if AT45DBX_MEM == ENABLE

#include "conf_at45dbx.h"
#include "at45dbx.h"
#include "at45dbx_mem.h"


//_____ D E F I N I T I O N S ______________________________________________

#define AT45DBX_MEM_TEST_CHANGE_STATE     ENABLED


#if (ACCESS_USB == ENABLED || ACCESS_MEM_TO_RAM == ENABLED) && AT45DBX_MEM_TEST_CHANGE_STATE == ENABLED

static volatile Bool s_b_data_modify = FALSE;

#endif





Ctrl_status at45dbx_test_unit_ready(void)
{
  return (at45dbx_mem_check() == OK) ? CTRL_GOOD : CTRL_NO_PRESENT;
}


Ctrl_status at45dbx_read_capacity(U32 *u32_nb_sector)
{
  *u32_nb_sector = (AT45DBX_MEM_CNT << (AT45DBX_MEM_SIZE - AT45DBX_SECTOR_BITS)) - 1;

  return CTRL_GOOD;
}


Bool at45dbx_wr_protect(void)
{
  return FALSE;
}


Bool at45dbx_removal(void)
{
  return FALSE;
}




#if ACCESS_USB == ENABLED

#include "usb_drv.h"
#include "scsi_decoder.h"





Ctrl_status at45dbx_usb_read_10(U32 addr, U16 nb_sector)
{
  if (addr + nb_sector > AT45DBX_MEM_CNT << (AT45DBX_MEM_SIZE - AT45DBX_SECTOR_BITS)) return CTRL_FAIL;

  at45dbx_read_open(addr);
  at45dbx_read_multiple_sector(nb_sector);
  at45dbx_read_close();

  return CTRL_GOOD;
}


void at45dbx_read_multiple_sector_callback(const void *psector)
{
  U16 data_to_transfer = AT45DBX_SECTOR_SIZE;

  // Transfer read sector to the USB interface.
  while (data_to_transfer)
  {
    while (!Is_usb_in_ready(g_scsi_ep_ms_in))
    {
      if(!Is_usb_endpoint_enabled(g_scsi_ep_ms_in))
         return; // USB Reset
    }         

    Usb_reset_endpoint_fifo_access(g_scsi_ep_ms_in);
    data_to_transfer = usb_write_ep_txpacket(g_scsi_ep_ms_in, psector,
                                             data_to_transfer, &psector);
    Usb_ack_in_ready_send(g_scsi_ep_ms_in);
  }
}


Ctrl_status at45dbx_usb_write_10(U32 addr, U16 nb_sector)
{
  if (addr + nb_sector > AT45DBX_MEM_CNT << (AT45DBX_MEM_SIZE - AT45DBX_SECTOR_BITS)) return CTRL_FAIL;

#if AT45DBX_MEM_TEST_CHANGE_STATE == ENABLED
  if (nb_sector) s_b_data_modify = TRUE;
#endif

  at45dbx_write_open(addr);
  at45dbx_write_multiple_sector(nb_sector);
  at45dbx_write_close();

  return CTRL_GOOD;
}


void at45dbx_write_multiple_sector_callback(void *psector)
{
  U16 data_to_transfer = AT45DBX_SECTOR_SIZE;

  // Transfer sector to write from the USB interface.
  while (data_to_transfer)
  {
    while (!Is_usb_out_received(g_scsi_ep_ms_out))
    {
      if(!Is_usb_endpoint_enabled(g_scsi_ep_ms_out))
         return; // USB Reset
    }         

    Usb_reset_endpoint_fifo_access(g_scsi_ep_ms_out);
    data_to_transfer = usb_read_ep_rxpacket(g_scsi_ep_ms_out, psector,
                                            data_to_transfer, &psector);
    Usb_ack_out_received_free(g_scsi_ep_ms_out);
  }
}



#endif  // ACCESS_USB == ENABLED


#if ACCESS_MEM_TO_RAM == ENABLED




Ctrl_status at45dbx_df_2_ram(U32 addr, void *ram)
{
  if (addr + 1 > AT45DBX_MEM_CNT << (AT45DBX_MEM_SIZE - AT45DBX_SECTOR_BITS)) return CTRL_FAIL;

  at45dbx_read_open(addr);
  at45dbx_read_sector_2_ram(ram);
  at45dbx_read_close();

  return CTRL_GOOD;
}


Ctrl_status at45dbx_ram_2_df(U32 addr, const void *ram)
{
  if (addr + 1 > AT45DBX_MEM_CNT << (AT45DBX_MEM_SIZE - AT45DBX_SECTOR_BITS)) return CTRL_FAIL;

#if AT45DBX_MEM_TEST_CHANGE_STATE == ENABLED
  s_b_data_modify = TRUE;
#endif

  at45dbx_write_open(addr);
  at45dbx_write_sector_from_ram(ram);
  at45dbx_write_close();

  return CTRL_GOOD;
}



#endif  // ACCESS_MEM_TO_RAM == ENABLED


#endif  // AT45DBX_MEM == ENABLE

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