USB_CDC_IF_ex.c File Reference

Extensions for USB VCP. More...

#include <string.h>
#include "sarmfsw.h"
#include "USB_CDC_IF_ex.h"
#include "usbd_cdc_if.h"

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Macros
#define	VCP_DEFAULT_SPEED   38400

Functions
FctERR	CDC_Control_Set_Line_State_Callback (const bool open)
	Callback for CDC port connection/disconnection.
FctERR	CDC_Control_Set_Line_State (const uint8_t *const pbuf)
	CDC Set Line State message handler.
void	CDC_Control_Set_Line_Coding (const uint8_t *const pbuf)
	CDC Set Line Coding message handler.
void	CDC_Control_Get_Line_Coding (uint8_t *const pbuf)
	CDC Get Line Coding message handler.
bool	get_CDC_Line_State (void)
	CDC Get current port state.

Detailed Description

Extensions for USB VCP.

Author

SMFSW

Copyright

MIT (c) 2017-2026, SMFSW

static int8_t CDC_Control_FS(uint8_t cmd, uint8_t* pbuf, uint16_t length)
{
   switch(cmd)
   {
       ...
 
       case CDC_SET_LINE_CODING:
           CDC_Control_Set_Line_Coding(pbuf);
       break;
 
       case CDC_GET_LINE_CODING:
           CDC_Control_Get_Line_Coding(pbuf);
       break;
 
       case CDC_SET_CONTROL_LINE_STATE:
           CDC_Control_Set_Line_State(pbuf);
       break;
 
       ...
   }
}

Note

Define USE_USB_CDC_IF_EX symbol at project level to use CDC_IF_ex functionalities

Macro Definition Documentation

VCP_DEFAULT_SPEED

#define VCP_DEFAULT_SPEED   38400

Function Documentation

CDC_Control_Get_Line_Coding()

void CDC_Control_Get_Line_Coding

(

uint8_t *const

pbuf

)

CDC Get Line Coding message handler.

Note

Call CDC_Control_Get_Line_Coding in usbd_cdc_if.c CDC_Control_FS function, CDC_GET_LINE_CODING case

Parameters

[in,out]

pbuf

- Pointer to message data

CDC_Control_Set_Line_Coding()

void CDC_Control_Set_Line_Coding

(

const uint8_t *const

pbuf

)

CDC Set Line Coding message handler.

Note

Call CDC_Control_Set_Line_Coding in usbd_cdc_if.c CDC_Control_FS function, CDC_SET_LINE_CODING case

Parameters

[in]

pbuf

- Pointer to message data

CDC_Control_Set_Line_State()

FctERR CDC_Control_Set_Line_State

(

const uint8_t *const

pbuf

)

CDC Set Line State message handler.

Note

Call CDC_Control_Set_Line_State in usbd_cdc_if.c CDC_Control_FS function, CDC_SET_CONTROL_LINE_STATE case

Several disconnection messages can appear on bus, use example code in callback to get only state change

Parameters

[in]

pbuf

- Pointer to message data

Returns

FctERR - Error code

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CDC_Control_Set_Line_State_Callback()

FctERR CDC_Control_Set_Line_State_Callback

(

const bool

open

)

Callback for CDC port connection/disconnection.

Weak Functions

CDC_Control_Set_Line_State_Callback may be user implemented to suit custom needs

Note

Several disconnection messages can appear on bus, use example code to get only state change

get_CDC_Line_State can be used instead (if not willing to use callback) to check port current status

Parameters

[in]

open

- port state

Returns

FctERR - Error code

static bool connected = false;
if (open != connected)  // To avoid multiple control line state disconnections
{
    connected = open;
    // Custom code here
}

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get_CDC_Line_State()

bool get_CDC_Line_State

(

void

)

CDC Get current port state.

Returns

Port state