usb_specific_request.c

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/* Copyright (c) 2007, Atmel Corporation All rights reserved.
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 * this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
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//_____ I N C L U D E S ____________________________________________________

#include "config.h"
#include "conf_usb.h"
#include "lib_mcu/usb/usb_drv.h"
#include "usb_descriptors.h"
#include "modules/usb/device_chap9/usb_standard_request.h"
#include "usb_specific_request.h"
#include "lib_mcu/uart/uart_lib.h"
#if ((USB_DEVICE_SN_USE==ENABLE) && (USE_DEVICE_SN_UNIQUE==ENABLE))
#include "lib_mcu/flash/flash_drv.h"
#endif

//_____ D E F I N I T I O N ________________________________________________

#ifdef __GNUC__
extern PGM_VOID_P pbuffer;
#else
extern U8   code *pbuffer;
#endif
extern U8   data_to_transfer;
extern S_line_coding   line_coding;
extern S_line_status line_status;


// We buffer the old state as it is wize only to send this interrupt message if
// sstate has changed.
extern S_serial_state serial_state;         // actual state
static S_serial_state serial_state_saved;   // buffered previously sent state
volatile U8 usb_request_break_generation=FALSE;


//_____ D E C L A R A T I O N ______________________________________________

Bool usb_user_read_request(U8 type, U8 request)
{
   U16 wValue;

   LSB(wValue) = Usb_read_byte();
   MSB(wValue) = Usb_read_byte();

   //** Specific request from Class CDC
   if( USB_SETUP_SET_CLASS_INTER == type )
   {
      switch( request )
      {
         case SETUP_CDC_SET_LINE_CODING:
         cdc_set_line_coding();
         return TRUE;
         break;
   
         case SETUP_CDC_SET_CONTROL_LINE_STATE:
         cdc_set_control_line_state(wValue); // according cdc spec 1.1 chapter 6.2.14
         return TRUE;
         break;
   
         case SETUP_CDC_SEND_BREAK:
         cdc_send_break(wValue);             // wValue contains break lenght
         return TRUE;
         break;
      }
   }
   if( USB_SETUP_GET_CLASS_INTER == type )
   {
      switch( request )
      {
         case SETUP_CDC_GET_LINE_CODING:
         cdc_get_line_coding();
         return TRUE;
         break;
      }
   }
   return FALSE;  // No supported request
}


void usb_user_endpoint_init(U8 conf_nb)
{
  usb_configure_endpoint(INT_EP,        \
                         TYPE_INTERRUPT,\
                         DIRECTION_IN,  \
                         SIZE_32,       \
                         ONE_BANK,      \
                         NYET_ENABLED);

  usb_configure_endpoint(TX_EP,         \
                         TYPE_BULK,     \
                         DIRECTION_IN,  \
                         SIZE_64,       \
                         TWO_BANKS,     \
                         NYET_ENABLED);

  usb_configure_endpoint(RX_EP,         \
                         TYPE_BULK,     \
                         DIRECTION_OUT, \
                         SIZE_64,       \
                         TWO_BANKS,     \
                         NYET_ENABLED);

  Usb_reset_endpoint(INT_EP);
  Usb_reset_endpoint(TX_EP);
  Usb_reset_endpoint(RX_EP);
}


U8   usb_user_interface_get( U16 wInterface )
{
   return 0;  // Only one alternate setting possible for all interface
}


void usb_user_interface_reset(U16 wInterface, U8 alternate_setting)
{  
   // default setting selected = reset data toggle
   if( INTERFACE0_NB == wInterface )
   {
      // Interface CDC ACM Com
      Usb_select_endpoint(INT_EP);
      Usb_disable_stall_handshake();
      Usb_reset_endpoint(INT_EP);
      Usb_reset_data_toggle();
   }
   if( INTERFACE1_NB == wInterface )
   {
      // Interface CDC ACM Data
      Usb_select_endpoint(TX_EP);
      Usb_disable_stall_handshake();
      Usb_reset_endpoint(TX_EP);
      Usb_reset_data_toggle();
      Usb_select_endpoint(RX_EP);
      Usb_disable_stall_handshake();
      Usb_reset_endpoint(RX_EP);
      Usb_reset_data_toggle();
   }
}


Bool usb_user_get_descriptor(U8 type, U8 string)
{ 
   return FALSE;
}

void cdc_get_line_coding(void)
{
     Usb_ack_receive_setup();
     Usb_write_byte(LSB0(line_coding.dwDTERate));
     Usb_write_byte(LSB1(line_coding.dwDTERate));
     Usb_write_byte(LSB2(line_coding.dwDTERate));
     Usb_write_byte(LSB3(line_coding.dwDTERate));
     Usb_write_byte(line_coding.bCharFormat);
     Usb_write_byte(line_coding.bParityType);
     Usb_write_byte(line_coding.bDataBits);

     Usb_send_control_in();
     while(!(Is_usb_read_control_enabled()));
     //Usb_clear_tx_complete();

   while(!Is_usb_receive_out());
   Usb_ack_receive_out();
}


void cdc_set_line_coding (void)
{
   Usb_ack_receive_setup();
   while (!(Is_usb_receive_out()));
   LSB0(line_coding.dwDTERate) = Usb_read_byte();
   LSB1(line_coding.dwDTERate) = Usb_read_byte();
   LSB2(line_coding.dwDTERate) = Usb_read_byte();
   LSB3(line_coding.dwDTERate) = Usb_read_byte();
   line_coding.bCharFormat = Usb_read_byte();
   line_coding.bParityType = Usb_read_byte();
   line_coding.bDataBits = Usb_read_byte();
     Usb_ack_receive_out();

     Usb_send_control_in();                // send a ZLP for STATUS phase
     while(!(Is_usb_read_control_enabled()));
#ifdef UART_U2
   Uart_set_baudrate((line_coding.dwDTERate)/2);
#else
   Uart_set_baudrate(line_coding.dwDTERate);
#endif
}


void cdc_set_control_line_state (U16 state)
{
     Usb_ack_receive_setup();
   Usb_send_control_in();
   line_status.all = state;
   
     while(!(Is_usb_read_control_enabled()));

}

Bool cdc_update_serial_state()
{
   if( serial_state_saved.all != serial_state.all)
   {
      serial_state_saved.all = serial_state.all;
      
      Usb_select_endpoint(INT_EP);
      if (Is_usb_write_enabled())
      {
         Usb_write_byte(USB_SETUP_GET_CLASS_INTER);   // bmRequestType
         Usb_write_byte(SETUP_CDC_BN_SERIAL_STATE);   // bNotification
         
         Usb_write_byte(0x00);   // wValue (zero)
         Usb_write_byte(0x00);
         
         Usb_write_byte(0x00);   // wIndex (Interface)
         Usb_write_byte(0x00);
         
         Usb_write_byte(0x02);   // wLength (data count = 2)
         Usb_write_byte(0x00);
         
         Usb_write_byte(LSB(serial_state.all));   // data 0: LSB first of serial state
         Usb_write_byte(MSB(serial_state.all));   // data 1: MSB follows
         Usb_ack_in_ready();
      }
      return TRUE;
   }
   return FALSE;
}

void cdc_send_break(U16 break_duration)
{
   Usb_ack_receive_setup();
    Usb_send_control_in();
   usb_request_break_generation=TRUE;
   while(!(Is_usb_read_control_enabled()));
}

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