xusb_microphone.h File Reference

Overview

This file contains the constants, type definitions, variables and function prototypes used in the usb microphone application.

Note

None.

MODIFICATION HISTORY:

Ver   Who  Date     Changes



1.00a hvm  12/20/10 First release
4.02a bss  02/20/12 Modified to include Little Endian and
                        Big Endian descriptors.

Macros
#define	EP_CONTROL   0
	Control Endpoint. More...
#define	EP_ISOCHRONOUS   1
	Isochronous Endpoint. More...
#define	EP_BULK   2
	Bulk Endpoint. More...
#define	EP_INTERRUPT   3
	Interrupt Endpoint. More...

Functions
void	InitUsbInterface (XUsb *InstancePtr)
	This is the USB initialization function. More...
void	UsbIfIntrHandler (void *CallBackRef, u32 IntrStatus)
	This function is the interrupt handler for the USB mass storage device application. More...
void	Ep0IntrHandler (void *CallBackRef, u8 EpNum, u32 IntrStatus)
	This function is the interrupt handler for the USB End point Zero events. More...
void	Ep1IntrHandler (void *CallBackRef, u8 EpNum, u32 IntrStatus)
	This function is the interrupt handler for the USB End point one events. More...

Macro Definition Documentation

#define EP_BULK   2

Bulk Endpoint.

#define EP_CONTROL   0

Control Endpoint.

#define EP_INTERRUPT   3

Interrupt Endpoint.

#define EP_ISOCHRONOUS   1

Isochronous Endpoint.

Function Documentation

void Ep0IntrHandler	(	void *	CallBackRef,
		u8	EpNum,
		u32	IntrStatus
	)

This function is the interrupt handler for the USB End point Zero events.

Parameters

CallBackRef	is the callback reference passed from the interrupt. handler, which in our case is a pointer to the driver instance.
EpNum	is the end point number.
IntrStatus	is a bit mask indicating pending interrupts.

Returns

None.

Note

EpNum is not used in this function as the handler is attached specific to end point zero. This parameter is useful when a single handler is used for processing all end point interrupts.

This function is the interrupt handler for the USB End point Zero events.

Parameters

CallBackRef	is the callback reference passed from the caller function, which in our case is a pointer to the driver instance.
EpNum	is the end point number.
IntrStatus	is a bit mask indicating pending interrupts.

Returns

None.

Note

EpNum is not used in this function as the handler is attached specific to end point zero. This parameter is useful when a single handler is used for processing all end point interrupts.

void Ep1IntrHandler	(	void *	CallBackRef,
		u8	EpNum,
		u32	IntrStatus
	)

This function is the interrupt handler for the USB End point one events.

Parameters

CallBackRef	is the callback reference passed from the interrupt handler, which in our case is a pointer to the driver instance.
EpNum	is the end point number.
IntrStatus	is a bit mask indicating pending interrupts.

Returns

None.

Note

EpNum is not used in this function as the handler is attached specific to end point one. This parameter is useful when a single handler is used for processing all end point interrupts.

This function is the interrupt handler for the USB End point one events.

Parameters

CallBackRef	is the callback reference passed from the caller function, which in our case is a pointer to the driver instance.
IntrStatus	is a bit mask indicating pending interrupts.

Returns

None.

Note

EpNum is not used in this function as the handler is attached specific to end point one. This parameter is useful when a single handler is used for processing all end point interrupts.

void InitUsbInterface

(

XUsb *

InstancePtr

)

This is the USB initialization function.

This example initializes the device for Mass Storage Application. The following configuration is done.

• EP0 : CONTROL end point, Bidirectional, Packet size 64 bytes.
• EP1 : NON_ISOCHRONOUS, BULK_IN, packet size 512 bytes.
• EP2 : NON_ISOCHRONOUS, BULK_OUT, packet size 512 bytes

Parameters

InstancePtr

is a pointer to the XUsb instance.

Returns

None.

Note

None.

This is the USB initialization function.

The following is the configuration.

• EP0 : CONTROL end point, Bidirectional, Packet size 64 bytes.
• EP1 : NON_ISOCHRONOUS, INTERRUPT_IN, packet size of 16 bytes.

Parameters

InstancePtr

is a pointer to the XUsb instance.

Returns

None.

Note

None.

This example initializes the device for Microphone Application. The following configuration is done.

• EP0 : CONTROL end point, Bidirectional, Packet size 64 bytes.
• EP1 : ISOCHRONOUS, BULK_IN, packet size 1024 bytes.

Parameters

InstancePtr

is a pointer to the XUsb instance.

Returns

None.

Note

None.

This example initializes the USB device for USB mouse example. The following configuration is done.

• EP0 : CONTROL end point, Bidirectional, Packet size 64 bytes.
• EP1 : NON_ISOCHRONOUS, INTERRUPT_IN, packet size of 16 bytes.

Parameters

InstancePtr

is a pointer to the XUsb instance.

Returns

None.

Note

None.

void UsbIfIntrHandler	(	void *	CallBackRef,
		u32	IntrStatus
	)

This function is the interrupt handler for the USB mass storage device application.

Parameters

CallBackRef	is the callback reference passed from the interrupt handler, which in our case is a pointer to the driver instance.
IntrStatus	is a bit mask indicating pending interrupts.

Returns

None.

Note

None.

This function is the interrupt handler for the USB mass storage device application.

Parameters

CallBackRef	is the callback reference passed from the interrupt handler, which in our case is a pointer to the driver instance.
IntrStatus	is a bit mask indicating pending interrupts.

Returns

None.

Note

Each interrupt source is disabled upon reception. This is to avoid the repetitive occurrence of the same event. This is done because these event conditions exist for few milliseconds.

This function is the interrupt handler for the USB mass storage device application.

Parameters

CallBackRef	is the callback reference passed from the interrupt handler, which in our case is a pointer to the driver instance.
IntrStatus	is a bit mask indicating pending interrupts.

Returns

None.

Note

None.

This function is the interrupt handler for the USB mass storage device application.

Parameters

CallBackRef	is the callback reference passed from to the function, which in our case is a pointer to the driver instance.
IntrStatus	is a bit mask indicating pending interrupts.

Returns

None.

Note

None.