USBD_ACM_SerialLineCtrlReg

Description

Register line control change notification callback.

Files

usbd_acm_serial.h/usbd_acm_serial.c

Prototype

void  USBD_ACM_SerialLineCtrlReg (CPU_INT08U                        subclass_nbr,
                                  USBD_ACM_SERIAL_LINE_CTRL_CHNGD   line_ctrl_chngd,
                                  void                             *p_arg,
                                  USBD_ERR                         *p_err);

Arguments

subclass_nbr

CDC ACM serial emulation subclass instance number.

line_ctrl_chngd

Line control change notification callback (see note #1).

p_arg

Pointer to callback argument.

p_err

Pointer to variable that will receive the return error code from this function.

USBD_ERR_NONE

USBD_ERR_INVALID_ARG

Returned Value

None.

Callers

Application.

Notes / Warnings

The callback specified by line_ctrl_chngd argument is used to notify changes in the control signals to the application. The line control notification function has the following prototype:

void AppLineCtrlChngd  (CPU_INT08U   subclass_nbr,
                        CPU_INT08U   events,
                        CPU_INT08U   events_chngd,
                        void        *p_arg);

Argument(s)

subclass_nbr

CDC ACM serial emulation subclass instance number.

events

Current line state.

events_chngd

Line state flags that have changed.

events_chngd

Pointer to callback argument.