www.pudn.com > at90usb128-demo-cdc-1_0_3.zip > cdc_task.c

//! 
//! @file cdc_task.c,v 
//! 
//! Copyright (c) 2004 Atmel. 
//! 
//! Please read file license.txt for copyright notice. 
//! 
//! @brief This file manages the CDC task. 
//! 
//! 
//! @version 1.6 at90usb128-demo-cdc-1_0_3 $Id: cdc_task.c,v 1.6 2006/03/17 13:06:22 rletendu Exp $ 
//! 
//! @todo 
//! @bug 
//!/ 
 
//_____  I N C L U D E S ___________________________________________________ 
 
#include "config.h" 
#include "conf_usb.h" 
#include "cdc_task.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" 
#include "uart_usb_lib.h" 
#include  
 
 
 
//_____ M A C R O S ________________________________________________________ 
 
 
 
 
 
//_____ D E F I N I T I O N S ______________________________________________ 
 
 
 
//_____ D E C L A R A T I O N S ____________________________________________ 
 
 
volatile U8 cpt_sof; 
extern U8    rx_counter; 
extern U8    tx_counter; 
S_line_coding line_coding; 
 
 
//! @brief This function initializes the hardware ressources required for CDC demo. 
//! 
//! 
//! @param none 
//! 
//! @return none 
//! 
//!/ 
void cdc_task_init(void) 
{ 
   uart_init(); 
   Leds_init(); 
   Joy_init(); 
   Hwb_button_init(); 
   Usb_enable_sof_interrupt(); 
#ifdef AVRGCC 
 	fdevopen(uart_usb_putchar,uart_usb_getchar); //for printf redirection  
#endif 
} 
 
 
 
 
 
//! @brief Entry point of the uart cdc management 
//! 
//! This function links the uart and the USB bus. 
//! 
//! @param none 
//! 
//! @return none 
void cdc_task(void) 
{ 
   if(Is_device_enumerated()) //Enumeration processs OK ? 
   { 
      if(cpt_sof>=NB_MS_BEFORE_FLUSH && tx_counter!=0 )  //Flush buffer in Timeout 
      { 
   	   cpt_sof=0; 
		   uart_usb_flush(); 
      } 
       
	   if (uart_test_hit())    //Something on USART ? 
  	   { 
  		   uart_usb_putchar(uart_getchar());   // Loop back, USART to USB 
         Led0_toggle(); 
  	   } 
    
      if (Uart_tx_ready())    //USART free ? 
      { 
         if (uart_usb_test_hit())   // Something received from the USB ? 
	      { 
	 	      while (rx_counter) 
		      { 
			      uart_putchar(uart_usb_getchar());   // loop back USB to USART 
               Led3_toggle(); 
		      } 
	      } 
      } 
 
      if ( cpt_sof>=REPEAT_KEY_PRESSED)   //Debounce joystick events 
      { 
         if (Is_joy_select()) 
         printf ("Select Pressed !\r\n"); 
 
         if (Is_joy_right()) 
         printf ("Right Pressed !\r\n"); 
    
         if (Is_joy_left()) 
         printf ("Left Pressed !\r\n"); 
 
         if (Is_joy_down()) 
         printf ("Down Pressed !\r\n"); 
 
         if (Is_joy_up()) 
         printf ("Up Pressed !\r\n"); 
 
         if(Is_hwb()) 
         printf("Hello from AT90USBXXX !\r\n"); 
      } 
   } 
} 
 
 
 
//! @brief sof_action 
//! 
//! This function increments the cpt_sof counter each times 
//! the USB Start Of Frame interrupt subroutine is executed (1ms) 
//! Usefull to manage time delays 
//! 
//! @warning Code:?? bytes (function code length) 
//! 
//! @param none 
//! 
//! @return none 
void sof_action() 
{ 
   cpt_sof++; 
}