mouse_task.c

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/* Copyright (c) 2007, Atmel Corporation All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 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.
 *
 * 3. The name of ATMEL may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY ATMEL ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY AND
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//_____  I N C L U D E S ___________________________________________________

#include "config.h"
#include "conf_usb.h"

#include "mouse_task.h"
#include "usb_descriptors.h"

#include "lib_mcu/usb/usb_drv.h"
#include "lib_mcu/adc/adc_drv.h"
#include "lib_mcu/wdt/wdt_drv.h"
#include "lib_mcu/power/power_drv.h"

#include "modules/usb/device_chap9/usb_standard_request.h"


//_____ M A C R O S ________________________________________________________

#define  Hid_mouse_report_up()            (g_hid_mouse_report[2]-=MOUSE_SPEED)
#define  Hid_mouse_report_down()          (g_hid_mouse_report[2]+=MOUSE_SPEED)
#define  Hid_mouse_report_left()          (g_hid_mouse_report[1]-=MOUSE_SPEED)
#define  Hid_mouse_report_right()         (g_hid_mouse_report[1]+=MOUSE_SPEED)

#define  Hid_mouse_report_scroll_up()     (g_hid_mouse_report[3]+=MOUSE_SPEED)
#define  Hid_mouse_report_scroll_down()   (g_hid_mouse_report[3]-=MOUSE_SPEED)
        
#define  Hid_mouse_report_click_left()    (g_hid_mouse_report[0] |= 0x01)
#define  Hid_mouse_report_click_right()   (g_hid_mouse_report[0] |= 0x02)
#define  Hid_mouse_report_click_middle()  (g_hid_mouse_report[0] |= 0x04)
        
        
#define  Hid_mouse_report_reset()         (g_hid_mouse_report[0]=0,g_hid_mouse_report[1]=0,g_hid_mouse_report[2]=0,g_hid_mouse_report[3]=0)

#define Is_mouse_left_event()             Is_joy_left()
#define Is_mouse_right_event()            Is_joy_right()
#define Is_mouse_up_event()               Is_joy_up()
#define Is_mouse_down_event()             Is_joy_down()

#define SCROLL_STEP      10
#define Is_mouse_scroll_up_event()        ((g_u16_pos_scroll+SCROLL_STEP) < Get_adc_pot_val())
#define Is_mouse_scroll_down_event()      ((g_u16_pos_scroll-SCROLL_STEP) > Get_adc_pot_val())

#define Is_mouse_click_left_event()       Is_btn_left()
#define Is_mouse_click_middle_event()     FALSE
#define Is_mouse_click_right_event()      Is_btn_middle()


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



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

bit   is_mouse_event(void);

Bool  g_b_send_report;
Bool  g_b_send_ack_report;
U8    g_hid_mouse_report[4];
#if (TARGET_BOARD==STK525)
U16 g_u16_pos_scroll;
#endif
volatile U8 g_u8_cpt_sof;


void mouse_task_init(void)
{
   // Init SOF
   g_u8_cpt_sof=0;
   Usb_enable_sof_interrupt();

   // Init interface board
   Joy_init();
   Hwb_button_init();
   Leds_init();
   Led1_on();
   Led0_off();
#if (TARGET_BOARD==STK525)
   init_adc();
   g_u16_pos_scroll=Get_adc_pot_val();
#endif
   
   // Send a ack report at startup
   g_b_send_report      = FALSE;
   g_b_send_ack_report  = TRUE;
}


void mouse_task(void)
{
   if(Is_usb_vbus_low())
   {
      Setup_power_down_mode();
      Sleep_instruction();
   }

   if(!Is_device_enumerated())
      return;  // Device not ready
   
#if (USB_LOW_SPEED_DEVICE==DISABLE)
   // The SOF is used to schedule the task at the same frequency that Endpoint Interrupt frequency
   // This check allow to win a CPU time
   if(g_u8_cpt_sof<NB_IDLE_POLLING_SOF)
      return;  // Wait a delay
   g_u8_cpt_sof=0;
#endif

   if(!g_b_send_report)
   {
      // No report sending on going then check mouse event to eventualy fill a new report
      if(is_mouse_event())
      {
         // Enable sending of report
         g_b_send_report      = TRUE;
      }
   }
   
   if((!g_b_send_report)&&(!g_b_send_ack_report))
      return;  // No report and ack to send
   
   //** A report or ack must be send
   Usb_select_endpoint(EP_MOUSE_IN);
   if(!Is_usb_write_enabled())
      return;  // Endpoint no free
   
   Led0_on();      
   if( g_b_send_report )
   {
      g_b_send_report      = FALSE;
      // Send an ack after a "clic" report only
      g_b_send_ack_report = (0!=g_hid_mouse_report[0]);
   }
   else
   {
      Hid_mouse_report_reset();     // Reset report to have a ack report
      g_b_send_ack_report  = FALSE;
   }
   // Send report
   Usb_write_byte(g_hid_mouse_report[0]);
   Usb_write_byte(g_hid_mouse_report[1]);
   Usb_write_byte(g_hid_mouse_report[2]);
   Usb_write_byte(g_hid_mouse_report[3]);
   Usb_ack_in_ready();
   Led0_off();      
}


bit is_mouse_event(void)
{
   Hid_mouse_report_reset();
   
   // Check Click events
   if(Is_mouse_click_left_event()) {
      Hid_mouse_report_click_left();
   }
   if(Is_mouse_click_middle_event()) {
      Hid_mouse_report_click_middle();
   }
   if(Is_mouse_click_right_event()) {
      Hid_mouse_report_click_right();
   }

   // Check Mouve events
   if (Is_mouse_left_event()) {
      Hid_mouse_report_left();
   }
   if (Is_mouse_right_event()) {
      Hid_mouse_report_right();
   }
   if (Is_mouse_up_event()) {
      Hid_mouse_report_up();
   }
   if (Is_mouse_down_event()) {
      Hid_mouse_report_down();
   }
#if (TARGET_BOARD==STK525)
   if (Is_mouse_scroll_up_event()) {
      g_u16_pos_scroll+=SCROLL_STEP;
      Hid_mouse_report_scroll_up();
   }
   if (Is_mouse_scroll_down_event()) {
      g_u16_pos_scroll-=SCROLL_STEP;
      Hid_mouse_report_scroll_down();
   }
#endif

   // Check report
   if((0==g_hid_mouse_report[0])
   && (0==g_hid_mouse_report[1])
   && (0==g_hid_mouse_report[2])
   && (0==g_hid_mouse_report[3]))
   {
      return FALSE;  // No event
   }
   return TRUE;      // Event(s) occurs
}


void sof_action()
{
   g_u8_cpt_sof++;
}


void suspend_action(void)
{
#if (USB_REMOTE_WAKEUP_FEATURE == ENABLED)
   if (remote_wakeup_feature == ENABLED)
   {
      Switches_enable_it();
   }
   Led1_off();
   Enable_interrupt();
   Enter_power_down_mode();
   Led1_on();
#endif 
} 


#if (USB_REMOTE_WAKEUP_FEATURE == ENABLED)
#ifdef __GNUC__
 ISR(PCINT0_vect)
#else
#pragma vector = PCINT0_vect
__interrupt void switch_event_int()
#endif
{
   Switches_disable_it();
   usb_generate_remote_wakeup();
}
#endif 

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