keyboard_task.c

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

#include "config.h"
#include "conf_usb.h"
#include "keyboard_task.h"
#include "lib_board/stk_525/stk_525.h"
#include "lib_mcu/usb/usb_drv.h"
#include "usb_descriptors.h"
#include "modules/usb/device_chap9/usb_standard_request.h"
#include "lib_mcu/power/power_drv.h"


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

U8  code    usb_keys[]= {HID_ENTER, \
HID_W, HID_E, HID_L, HID_C, HID_O, HID_M, HID_E, HID_SPACEBAR, HID_T, HID_O, HID_SPACEBAR, HID_H, HID_I, HID_D, HID_SPACEBAR, HID_K, HID_E, HID_Y, HID_B, HID_O, HID_A, HID_R, HID_D, HID_SPACEBAR, HID_D, HID_E, HID_M, HID_O, HID_SPACEBAR, HID_A, HID_N, HID_D, HID_SPACEBAR, HID_C, HID_O, HID_N, HID_G, HID_R, HID_A, HID_T, HID_U, HID_L, HID_A, HID_T, HID_I, HID_O, HID_N, HID_S, HID_SPACEBAR, HID_F, HID_O, HID_R, HID_SPACEBAR, HID_S, HID_E, HID_L, HID_E, HID_C, HID_T, HID_I, HID_N, HID_G, HID_SPACEBAR, HID_T, HID_H, HID_E, HID_SPACEBAR, HID_A, HID_T, HID_9, HID_0, HID_U, HID_S, HID_B, HID_X, HID_X, HID_X, HID_SPACEBAR, HID_M, HID_I, HID_C, HID_R, HID_O, HID_C, HID_O, HID_N, HID_T, HID_R, HID_O, HID_L, HID_L, HID_E, HID_R, HID_SPACEBAR, HID_F, HID_A, HID_M, HID_I, HID_L, HID_Y, HID_DOT,HID_ENTER,HID_ENTER\
,HID_T, HID_H, HID_E, HID_SPACEBAR, HID_A, HID_T, HID_9, HID_0, HID_U, HID_S, HID_B, HID_X, HID_X, HID_X, HID_SPACEBAR,HID_I, HID_S, HID_SPACEBAR, HID_B, HID_A, HID_S, HID_E, HID_D, HID_SPACEBAR,HID_O, HID_N, HID_SPACEBAR, HID_T, HID_H, HID_E, HID_SPACEBAR, HID_A, HID_V, HID_R, HID_SPACEBAR, HID_C, HID_O, HID_R, HID_E, HID_SPACEBAR, HID_W, HID_I, HID_T, HID_H, HID_SPACEBAR, HID_T, HID_H, HID_E, HID_SPACEBAR, HID_F, HID_O, HID_L, HID_L, HID_O, HID_W, HID_I, HID_N, HID_G, HID_SPACEBAR, HID_F, HID_E, HID_A, HID_T, HID_U, HID_R, HID_E, HID_S, HID_ENTER\
,HID_KEYPAD_MINUS,HID_SPACEBAR,HID_U,HID_S,HID_B,HID_SPACEBAR,HID_O,HID_T,HID_G,HID_SPACEBAR,HID_ENTER\
,HID_KEYPAD_MINUS,HID_SPACEBAR,HID_L,HID_O,HID_W,HID_SLASH,HID_F,HID_U,HID_L,HID_L,HID_SPACEBAR,HID_S,HID_P,HID_E,HID_E,HID_D,HID_SPACEBAR,HID_C,HID_O,HID_N,HID_T,HID_R,HID_O,HID_L,HID_L,HID_E,HID_R,HID_SPACEBAR,HID_W,HID_I,HID_T,HID_H,HID_SPACEBAR,HID_7,HID_SPACEBAR,HID_E,HID_N,HID_D,HID_P,HID_O,HID_I,HID_N,HID_T,HID_S,HID_ENTER\
,HID_KEYPAD_MINUS,HID_SPACEBAR,HID_U,HID_P,HID_SPACEBAR,HID_T,HID_O,HID_SPACEBAR,HID_1,HID_2,HID_8,HID_SPACEBAR,HID_K,HID_B,HID_Y,HID_T,HID_E,HID_S,HID_SPACEBAR,HID_O,HID_N,HID_KEYPAD_MINUS,HID_C,HID_H,HID_I,HID_P,HID_SPACEBAR,HID_F,HID_L,HID_A,HID_S,HID_H,HID_SPACEBAR,HID_M,HID_E,HID_M,HID_O,HID_R,HID_Y,HID_ENTER\
,HID_KEYPAD_MINUS,HID_SPACEBAR,HID_U,HID_S,HID_B,HID_SPACEBAR,HID_B,HID_O,HID_O,HID_T,HID_L,HID_O,HID_A,HID_D,HID_E,HID_R,HID_ENTER\
,HID_KEYPAD_MINUS,HID_SPACEBAR,HID_U,HID_A,HID_R,HID_T,HID_SLASH,HID_S,HID_P,HID_I,HID_SLASH,HID_SPACEBAR,HID_T,HID_W,HID_I,HID_ENTER\
,HID_SPACEBAR,HID_SPACEBAR,HID_A,HID_N,HID_D,HID_SPACEBAR,HID_M,HID_O,HID_R,HID_E,HID_DOT,HID_DOT,HID_DOT,HID_ENTER\
,HID_E,HID_N,HID_J,HID_O,HID_Y,HID_SPACEBAR,HID_Y,HID_O,HID_U,HID_R,HID_SPACEBAR,HID_T,HID_I,HID_M,HID_E,HID_SPACEBAR,HID_W,HID_I,HID_T,HID_H,HID_SPACEBAR,HID_A,HID_T,HID_M,HID_E,HID_L,HID_SPACEBAR,HID_P,HID_R,HID_O,HID_D,HID_U,HID_C,HID_T,HID_S,HID_DOT,HID_DOT,HID_DOT\
                           };

#define SIZEOF_USB_KEYS     (Uint16)sizeof(usb_keys)


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

volatile U8    cpt_sof;
         U8    transmit_no_key;
volatile bit   key_hit;
         U8    usb_key;
         U8    usb_kbd_state;
         U16   usb_data_to_send;
#ifdef __GNUC__
PGM_VOID_P     usb_key_pointer;
#else
U8   code *    usb_key_pointer;
#endif


void keyboard_task_init(void)
{
   transmit_no_key   = FALSE;
   key_hit           = FALSE;
   usb_kbd_state     = 0;
   Joy_init();
   cpt_sof           = 0;
}


void keyboard_task(void)
{
   if(Is_device_enumerated())
   {
      // if USB ready to transmit new data :
      //        - if last time = 0, nothing
      //        - if key pressed -> transmit key
      //        - if !key pressed -> transmit 0
      if (key_hit==FALSE)
      {
         kbd_test_hit();
      }
      
      else
      {
         Usb_select_endpoint(EP_KBD_IN);   
         if(Is_usb_write_enabled())
         {
            if ( transmit_no_key==FALSE)
            {
               transmit_no_key = TRUE;
               Usb_write_byte(HID_MODIFIER_NONE);  // Byte0: Modifier
               Usb_write_byte(0);                  // Byte1: Reserved
               Usb_write_byte(usb_key);            // Byte2: Keycode 0
               Usb_write_byte(0);                  // Byte2: Keycode 1
               Usb_write_byte(0);                  // Byte2: Keycode 2
               Usb_write_byte(0);                  // Byte2: Keycode 3
               Usb_write_byte(0);                  // Byte2: Keycode 4
               Usb_write_byte(0);                  // Byte2: Keycode 5
               Usb_send_in();
               return;
            }
            else
            {
               key_hit = FALSE;
               transmit_no_key = FALSE;
               Usb_write_byte(0);
               Usb_write_byte(0);
               Usb_write_byte(0);
               Usb_write_byte(0);
               Usb_write_byte(0);
               Usb_write_byte(0);
               Usb_write_byte(0);
               Usb_write_byte(0);
               Usb_send_in();
            }
         }
      }
   }
}


void kbd_test_hit(void)
{
   switch (usb_kbd_state)
   {
      case 0:
      if (Is_btn_middle())
      {
         usb_kbd_state = 1;
         usb_key_pointer = usb_keys;
         usb_data_to_send = SIZEOF_USB_KEYS;
      }
      break;

      case 1:
      if (usb_data_to_send != 0)
      {
         if ((key_hit == FALSE) && (transmit_no_key == FALSE))
         {
#ifndef __GNUC__
            usb_key = *usb_key_pointer++;
#else
            usb_key = pgm_read_byte_near(usb_key_pointer++);
#endif
            usb_data_to_send --;
            key_hit = TRUE;
         }
      }
      else
      {
         usb_kbd_state = 0;
      }
      break;
   }
}


void vbus_off_action(void)
{
   Usb_detach();
}


void suspend_action(void)
{
#if (USB_REMOTE_WAKEUP_FEATURE == ENABLED)
   if (remote_wakeup_feature == ENABLED)
   {
      Switches_enable_it()
   }
#endif 
   Enable_interrupt();  
   Enter_power_down_mode();
}


#ifdef __GNUC__
 ISR(PCINT0_vect)
#else
#pragma vector = PCINT0_vect
__interrupt void mouse_disco_int()
#endif
{
   Switches_disable_it();
   usb_generate_remote_wakeup();
}

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