cdc_task.c File Reference

#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 "lib_mcu/util/start_boot.h"
#include <stdio.h>

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Functions

void cdc_task_init (void)
void cdc_task (void)
void sof_action ()
__interrupt void usart_receive_interrupt ()

Variables

volatile U8 cpt_sof
U8 rx_counter
U8 tx_counter
volatile U8 usb_request_break_generation
S_line_coding line_coding
S_line_status line_status
S_serial_state serial_state
volatile U8 rs2usb [10]


Detailed Description

This file manages the CDC task.

Author:
Atmel Corporation: http://www.atmel.com
Support and FAQ: http://support.atmel.no/

Definition in file cdc_task.c.


Function Documentation

void cdc_task_init ( void   ) 

This function initializes the hardware ressources required for CDC demo.

Parameters:
none 
Returns:
none
/

Definition at line 90 of file cdc_task.c.

References Hwb_button_init, Joy_init, Leds_init, Uart_enable_it_rx, uart_init(), uart_usb_getchar(), uart_usb_putchar, and Usb_enable_sof_interrupt.

00091 {
00092    uart_init();
00093    Uart_enable_it_rx();
00094    Leds_init();
00095    Joy_init();
00096    Hwb_button_init();
00097    Usb_enable_sof_interrupt();
00098 #ifdef __GNUC__
00099    fdevopen((int (*)(char, FILE*))(uart_usb_putchar),(int (*)(FILE*))uart_usb_getchar); //for printf redirection
00100 #endif
00101 }

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void cdc_task ( void   ) 

Entry point of the uart cdc management This function links the uart and the USB bus.

Parameters:
none 
Returns:
none

Definition at line 112 of file cdc_task.c.

References S_serial_state::bDCD, S_serial_state::bDSR, cdc_update_serial_state(), cpt_sof, S_line_status::DTR, FALSE, Is_device_enumerated, Is_hwb, Is_joy_down, Is_joy_left, Is_joy_right, Is_joy_select, Is_joy_up, Led1_toggle, Led2_toggle, REPEAT_KEY_PRESSED, rx_counter, start_boot(), TRUE, uart_putchar(), Uart_tx_ready, uart_usb_getchar(), uart_usb_test_hit(), Usb_detach, and usb_request_break_generation.

00113 {
00114       
00115    if(Is_device_enumerated() && line_status.DTR) //Enumeration processs OK and COM port openned ?
00116         {
00117       if (Uart_tx_ready())    //USART free ?
00118       {
00119          if (uart_usb_test_hit())   // Something received from the USB ?
00120          {
00121              while (rx_counter)
00122             {
00123                uart_putchar(uart_usb_getchar());   // loop back USB to USART
00124                Led1_toggle();
00125             }
00126          }
00127       }
00128 
00129       if ( cpt_sof>=REPEAT_KEY_PRESSED)   //Debounce joystick events
00130       {
00131          if (Is_joy_select()) {
00132          printf ("Select Pressed !\r\n");
00133          }
00134          if (Is_joy_right()) {
00135             printf ("Right Pressed !\r\n");
00136             serial_state.bDCD = TRUE;
00137          }
00138          else
00139             serial_state.bDCD = FALSE;
00140 
00141          if (Is_joy_left()) {
00142             printf ("Left Pressed !\r\n");
00143             serial_state.bDSR = TRUE;
00144          }
00145          else
00146             serial_state.bDSR = FALSE;
00147 
00148          if (Is_joy_down())
00149          printf ("Down Pressed !\r\n");
00150 
00151          if (Is_joy_up())
00152          printf ("Up Pressed !\r\n");
00153 
00154          if(Is_hwb())
00155          printf("Hello from ATmega32U4 !\r\n");
00156          
00157          cdc_update_serial_state();
00158       }
00159 
00160       if(usb_request_break_generation==TRUE)
00161       {
00162          U32 volatile tempo;
00163          usb_request_break_generation=FALSE;
00164          Led2_toggle();
00165          Usb_detach();                          // Detach actual USB Device
00166          for(tempo=0;tempo<70000;tempo++);      // Wait some time before
00167          start_boot();                          // Jumping to booltoader
00168       }
00169    }
00170 }

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__interrupt void usart_receive_interrupt (  ) 

Uart Receive interrupt subroutine

Parameters:
none 
Returns:
none

Definition at line 198 of file cdc_task.c.

References FALSE, Is_device_enumerated, Is_usb_write_enabled, rs2usb, TX_EP, Uart_get_byte, Uart_rx_ready, uart_usb_send_buffer(), Usb_get_selected_endpoint, and Usb_select_endpoint.

00200 {
00201    U8 i=0;
00202    U8 save_ep;
00203    
00204    if(Is_device_enumerated()) 
00205    {
00206       save_ep=Usb_get_selected_endpoint();   
00207       Usb_select_endpoint(TX_EP);
00208       do 
00209       {
00210          if(Uart_rx_ready())
00211          {
00212             rs2usb[i]=Uart_get_byte();
00213             i++;
00214          }
00215       }while(Is_usb_write_enabled()==FALSE );
00216       uart_usb_send_buffer((U8*)&rs2usb,i);
00217       Usb_select_endpoint(save_ep);
00218    }
00219 }

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Variable Documentation

volatile U8 cpt_sof

Definition at line 70 of file cdc_task.c.

Referenced by cdc_task(), and sof_action().

U8 rx_counter

Definition at line 57 of file uart_usb_lib.c.

Referenced by cdc_task(), uart_usb_getchar(), uart_usb_init(), and uart_usb_test_hit().

U8 tx_counter

volatile U8 usb_request_break_generation

Definition at line 77 of file usb_specific_request.c.

Referenced by cdc_send_break(), and cdc_task().

S_line_coding line_coding

Definition at line 75 of file cdc_task.c.

S_line_status line_status

Definition at line 76 of file cdc_task.c.

S_serial_state serial_state

Definition at line 77 of file cdc_task.c.

volatile U8 rs2usb[10]

Definition at line 79 of file cdc_task.c.

Referenced by usart_receive_interrupt().


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