scib_api.c

atmel c5122 USB C51程序

/*F**************************************************************************
* NAME: scib_start_wt 
*----------------------------------------------------------------------------
* PARAMS: dw_timeout value of time out in etu
* return: none 
*----------------------------------------------------------------------------
* PURPOSE: 
* Start waiting time counter
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE: 
*----------------------------------------------------------------------------
* REQUIREMENTS: 
*****************************************************************************/
void scib_start_wt(Uint32 dw_timeout)
{
  /*modify SCWTx registers */
  Union32 udw_timeout;

  udw_timeout.dw = dw_timeout;

  scib_dis_wait_time_count();

  scib_store_waiting_time( udw_timeout);

  scib_en_wait_time_inter();
  
  uc_error &= ~ MSK_SCIIR_SCWTI;
  
  /*start counter WTEN=1 */
  scib_en_wait_time_count();
}


/*F**************************************************************************
* NAME: scib_send_string_pol 
*----------------------------------------------------------------------------
* PARAMS: *uc_data_to_send: address of the string to send,
* uc_data_length: length of the string to send
* return: none 
*----------------------------------------------------------------------------
* PURPOSE: 
* Send a string with polling between each byte
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE: 
*----------------------------------------------------------------------------
* REQUIREMENTS: 
*****************************************************************************/
/*
void scib_send_string_pol(Uchar *uc_data_to_send, Uchar uc_data_length)
{
  Uchar index;

  //clear SCRS
  Scib_clear_SCRS();     

  for(index=0;index<uc_data_length;index++)
  {  
    SCTBUF = uc_data_to_send[index];

    //test SCTC
    while(MSK_SCISR_SCTC != (SCISR & MSK_SCISR_SCTC));
   
    //clear SCTC
    SCISR &= (~MSK_SCISR_SCTC);
  }  
}
*/

/*F**************************************************************************
* NAME: scib_card_int_rx
*----------------------------------------------------------------------------
* PARAMS: puc_buffer = address buffer rx ATR
*         us_size_buffer = size max ATR  
*         dw_BWT = timeout first byte
*         dw_CWT = timeout inter byte
* return: none
*----------------------------------------------------------------------------
* PURPOSE: 
* This function initialise the reception data from smart card
* in power up sequence, This function initialise time the BWT and CWT for ATR
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE: 
*----------------------------------------------------------------------------
* REQUIREMENTS: 
*****************************************************************************/
void scib_card_init_rx( Uchar * puc_buffer, Uint16 us_size_buffer,
                        Uint32 dw_BWT, Uint32 dw_CWT )
{
  Union32 udw_timeout;

  /* init Rx variable for interrupt Rx */
  us_size_rx = 0;
  puc_buffer_rx = puc_buffer ;
  
  scib_en_receiver_inter ();
  
  /* set timeout for reception first byte smart card */
  scib_dis_wait_time_count ();
  scib_start_wt (dw_BWT);  
  
  /* Set mode UART */
  Scib_set_SCRS();
  //SCICR |= MSK_SCICR_UART;
  scib_set_or_scicr(MSK_SCICR_UART);
  
  us_size_buffer_rx_max = us_size_buffer;
  
  /* load a new timeout CWT for other byte recept*/	
  ast_slot[0].u32_CWT.dw=dw_CWT;
  udw_timeout.dw = dw_CWT;
  scib_store_waiting_time( udw_timeout);
}



/*F**************************************************************************
* NAME: scib_card_wait_rx
*----------------------------------------------------------------------------
* PARAMS: us_data_length: length of the string receive of the smart card
* return: none
*----------------------------------------------------------------------------
* PURPOSE: 
* This function wait reception of us_data_length bytes or a error (timeout,.)
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE: 
* This function check the global variable uc_error for stop the wait RX
* or the global variable us_size_rx this variable is update by interrupt SCIB
*----------------------------------------------------------------------------
* REQUIREMENTS: 
*****************************************************************************/
Uchar scib_card_wait_rx(Uint16 us_data_length)
{
 
  while ((us_size_rx<us_data_length)  && (!(uc_error )));

  if (uc_error)
      return (KO);
  
  return (OK);
}


/*F**************************************************************************
* NAME: nb_byte_in_td
*----------------------------------------------------------------------------
* PARAMS: uc_TDx : byte TD of ATR
* return: number byte anounced in TD byte
*----------------------------------------------------------------------------
* PURPOSE: 
* This function compute the number of byte announced in the byte TDx
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE: 
*----------------------------------------------------------------------------
* REQUIREMENTS: 
****************************************************************************/
Uchar nb_byte_in_td (Uchar uc_TDx)
{
  Uchar uc_i;
  Uchar uc_msk_bit;
  Uchar nb_byte;
  
  nb_byte = 0;
  uc_msk_bit =0x10 ;
  for ( uc_i=0 ; uc_i<4  ; uc_i++ )
  {
    if (( uc_TDx & uc_msk_bit) != 0)
      nb_byte ++;
    uc_msk_bit <<=1;
  }
  return nb_byte;
}


/*F**************************************************************************
* NAME: scib_wait
*----------------------------------------------------------------------------
* PARAMS: none
* return: none
*----------------------------------------------------------------------------
* PURPOSE: 
* This function wait a interrupt SCIB timeout
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE: 
*----------------------------------------------------------------------------
* REQUIREMENTS: 
*****************************************************************************/
void scib_wait (void)
{
  while ( ( uc_error & (MSK_SCISR_CARDIN | MSK_SCIIR_SCWTI)) == 0);
}


/*F**************************************************************************
* NAME: scib_set_etu_timer
*----------------------------------------------------------------------------
* PARAMS: dw_laps laps a waiting time in etu with etu = DEFAULT_ETU
* return: none
*----------------------------------------------------------------------------
* PURPOSE: 
* 
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE: 
*----------------------------------------------------------------------------
* REQUIREMENTS: 
*****************************************************************************/
void scib_set_etu_timer (Uint32 dw_laps)
{
  Scib_set_and_ien1(~MSK_IEN1_ESCI);
  scib_dis_wait_time_count ();
  scib_start_wt (dw_laps);
}


/*F**************************************************************************
* NAME: scib_set_and_wait
*----------------------------------------------------------------------------
* PARAMS: dw_laps laps a waiting time in etu with etu = DEFAULT_ETU
* return: none
*----------------------------------------------------------------------------
* PURPOSE: 
* 
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE: 
*----------------------------------------------------------------------------
* REQUIREMENTS: 
*****************************************************************************/
void scib_set_and_wait (Uint32 dw_laps)
{
  scib_set_etu_timer (dw_laps);
  scib_wait ();
  uc_error &= ~MSK_SCIIR_SCWTI;
}




/*F**************************************************************************
* NAME: scib_card_send_tx
*----------------------------------------------------------------------------
* PARAMS: uc_size size data send
* return: O if OK 
*----------------------------------------------------------------------------
* PURPOSE: 
* This function send data to the smart card and wait the end of tx.
* The function start the timeout BWT/CWT if SCIB error is detect then exit
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE: 
* This function check the global variable use by interrupt (uc_error, 
* us_size_tx)
*----------------------------------------------------------------------------
* REQUIREMENTS: 
*****************************************************************************/
Uchar scib_card_send_tx (Uint16 us_size)
{
  Uchar uc_first_byte;


  uc_transmit = 0;


  us_size_tx = us_size;
  us_size_tx --;  
  uc_first_byte = * puc_buffer_tx ++;

  Scib_set_SCRS();  
  /* if 1 byte */
  if (us_size==1)
  {
    Scib_enable_it_transmit_buffer();
    Scib_disable_it_empty_buffer();

    /*start counter WTEN=1 */
    scib_en_wait_time_count();
  }
  else
  {
    Scib_enable_it_empty_buffer();
    Scib_disable_it_transmit_buffer();
  }

  // Send First Byte  
  Scib_clear_SCRS();
  Scib_putchar(uc_first_byte);  //  SCTBUF = uc_first_byte;

  /* wait end tx for start timeout CWT */
  while ((uc_transmit == 0) && (uc_error==0)); 

  return uc_error;
}

/*_____ E N D  O F  F I L E  _________________________________________________*/