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 89 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.

00090 {
00091    uart_init();
00092    Uart_enable_it_rx();
00093    Leds_init();
00094    Joy_init();
00095    Hwb_button_init();
00096    Usb_enable_sof_interrupt();
00097 #ifdef __GNUC__
00098     fdevopen((int (*)(char, FILE*))(uart_usb_putchar),(int (*)(FILE*))uart_usb_getchar); //for printf redirection 
00099 #endif
00100 }

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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 111 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_btn_left, Is_btn_middle, Is_device_enumerated, Is_joy_down, Is_joy_left, Is_joy_right, Is_joy_up, Led2_toggle, Led3_toggle, REPEAT_KEY_PRESSED, rx_counter, TRUE, uart_putchar(), Uart_tx_ready, uart_usb_getchar(), uart_usb_test_hit(), and usb_request_break_generation.

00112 {
00113       
00114    if(Is_device_enumerated() && line_status.DTR) //Enumeration processs OK and COM port openned ?
00115         {
00116       if (Uart_tx_ready())    //USART free ?
00117       {
00118          if (uart_usb_test_hit())   // Something received from the USB ?
00119          {
00120              while (rx_counter)
00121             {
00122                uart_putchar(uart_usb_getchar());   // loop back USB to USART
00123                Led3_toggle();
00124             }
00125          }
00126       }
00127 
00128       if ( cpt_sof>=REPEAT_KEY_PRESSED)   //Debounce joystick events
00129       {
00130          if (Is_btn_middle()){
00131             printf ("Select Pressed !\r\n");
00132          }
00133          if (Is_joy_right()) {
00134             printf ("Right Pressed !\r\n");
00135             serial_state.bDCD = TRUE;
00136          }
00137          else
00138             serial_state.bDCD = FALSE;
00139 
00140          if (Is_joy_left()) {
00141             printf ("Left Pressed !\r\n");
00142             serial_state.bDSR = TRUE;
00143          }
00144          else
00145             serial_state.bDSR = FALSE;
00146 
00147          if (Is_joy_down())
00148          printf ("Down Pressed !\r\n");
00149 
00150          if (Is_joy_up())
00151          printf ("Up Pressed !\r\n");
00152 
00153          if(Is_btn_left())
00154          printf("Hello from AT90USBXXX !\r\n");
00155          
00156          cdc_update_serial_state();
00157       }
00158 
00159       if(usb_request_break_generation==TRUE)
00160       {
00161          usb_request_break_generation=FALSE;
00162          Led2_toggle();
00163       }
00164    }
00165 }

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__interrupt void usart_receive_interrupt (  ) 

Uart Receive interrupt subroutine

Parameters:
none 
Returns:
none

Definition at line 193 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.

00195 {
00196    U8 i=0;
00197    U8 save_ep;
00198    
00199    if(Is_device_enumerated()) 
00200    {
00201       save_ep=Usb_get_selected_endpoint();   
00202       Usb_select_endpoint(TX_EP);
00203       do 
00204       {
00205          if(Uart_rx_ready())
00206          {
00207             rs2usb[i]=Uart_get_byte();
00208             i++;
00209          }
00210       }while(Is_usb_write_enabled()==FALSE );
00211       uart_usb_send_buffer((U8*)&rs2usb,i);
00212       Usb_select_endpoint(save_ep);
00213    }
00214 }

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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 74 of file cdc_task.c.

S_line_status line_status

Definition at line 75 of file cdc_task.c.

S_serial_state serial_state

Definition at line 76 of file cdc_task.c.

volatile U8 rs2usb[10]

Definition at line 78 of file cdc_task.c.

Referenced by usart_receive_interrupt().


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