Modules
	Related Project(s)
	In this section you can find all the projects related to the UHI for Android Open Accessory.

Data Structures
struct	uhi_aoa_dev_t
	Stores relevant information about the USB connection. More...

Macros
#define	UHI_AOA
	Global structure which contains standard UHI API for UHC. More...

Variables
volatile uint8_t	uhi_aoa_enable_stage
	Stores the status of the process enabling the Accessory device. More...

volatile uint16_t	uhi_aoa_protocol
	Stores the "Android Open Accessory Protocol" version. More...

Stages of enabling the Android Device
#define	AOA_ENABLE_STAGE_PROCESSING 0

#define	AOA_ENABLE_STAGE_SUCCESSFUL 1

#define	AOA_ENABLE_STAGE_FAILED 2

Internal Defines and Variables to store information about the Accessory
static struct uhi_aoa_dev_t	uhi_aoa_dev

void	uhi_aoa_mode_enable_step1 (uhc_device_t *)
	Function to enable the Accessory Mode on Android Devices. More...

void	uhi_aoa_mode_enable_step2 (usb_add_t, uhd_trans_status_t, uint16_t)
	Function to enable the Accessory Mode on Android Devices. More...

void	uhi_aoa_mode_enable_step3 (usb_add_t, uhd_trans_status_t, uint16_t)
	Function to enable the Accessory Mode on Android Devices. More...

void	uhi_aoa_mode_enable_complete (usb_add_t, uhd_trans_status_t, uint16_t)
	Function to enable the Accessory Mode on Android Devices. More...

static void	uhi_aoa_enable_success (void)
	Function to end AoA enabling success. More...

#define	uhi_aoa_dev_sel (&uhi_aoa_dev)
	Current USB device AOA selected by the UHI AOA. More...

#define	AOA_STRING_MANUFACTURER "Atmel"

#define	AOA_STRING_MODEL "EVK1105"

#define	AOA_STRING_DESCRIPTION "EVK1105 Application Board"

#define	AOA_STRING_VERSION "1.0"

#define	AOA_STRING_URL "http://www.microchip.com/design-centers/smartphone-accessory"

#define	AOA_STRING_SERIAL "0000000012345678"

Functions required by UHC
uhc_enum_status_t	uhi_aoa_install (uhc_device_t *dev)
	Functions required by UHC. More...

void	uhi_aoa_enable (uhc_device_t *dev)

void	uhi_aoa_uninstall (uhc_device_t *dev)

Routines to initialize the Android device
void	uhi_aoa_send_info_string (uint8_t, char *, uhd_callback_setup_end_t)
	Function to send Identifying Information to the Android Device. More...

bool	uhi_aoa_configure (uhc_device_t *)
	Tries to configure bulk Endpoints for the Android Accessory. More...

void	main_event_aoa (uhc_device_t *, bool)
	Takes care of Devices being attached/detached. More...

Routines to communicate with the Android device
bool	uhi_aoa_read (uint8_t *payload, uint16_t payload_size, uhd_callback_trans_t callback_end)
	Main Function to receive a message from an Android device. More...

bool	uhi_aoa_write (uint8_t *payload, uint16_t payload_size, uhd_callback_trans_t callback_end)
	Main Function to send a message to an Android device. More...

bool	uhi_aoa_register_hid (uint16_t id, uint8_t *hid_rpt_desc, uint16_t hid_rpt_desc_len)
	Register a HID device. More...

bool	uhi_aoa_unregister_hid (uint16_t id)
	Unregister a HID device. More...

bool	uhi_aoa_send_hid_event (uint16_t id, void *hid_rpt, uint16_t rpt_size)
	Send HID events. More...

#define AOA_ENABLE_STAGE_FAILED 2

Referenced by uhi_aoa_mode_enable_complete(), uhi_aoa_mode_enable_step2(), and uhi_aoa_mode_enable_step3().

#define AOA_ENABLE_STAGE_PROCESSING 0

Referenced by uhi_aoa_enable(), and uhi_aoa_install().

#define AOA_ENABLE_STAGE_SUCCESSFUL 1

Referenced by uhi_aoa_enable(), uhi_aoa_install(), uhi_aoa_mode_enable_complete(), and uhi_aoa_register_hid().

#define AOA_STRING_DESCRIPTION "EVK1105 Application Board"

Referenced by uhi_aoa_mode_enable_step2().

#define AOA_STRING_MANUFACTURER "Atmel"

Referenced by uhi_aoa_mode_enable_step2().

#define AOA_STRING_MODEL "EVK1105"

Referenced by uhi_aoa_mode_enable_step2().

#define AOA_STRING_SERIAL "0000000012345678"

Referenced by uhi_aoa_mode_enable_step2().

#define AOA_STRING_URL "http://www.microchip.com/design-centers/smartphone-accessory"

Referenced by uhi_aoa_mode_enable_step2().

#define AOA_STRING_VERSION "1.0"

Referenced by uhi_aoa_mode_enable_step2().

#define UHI_AOA

Value:

{ \
        .install = uhi_aoa_install, \
        .enable = uhi_aoa_enable, \
        .uninstall = uhi_aoa_uninstall, \
        .sof_notify = NULL, \
}

Global structure which contains standard UHI API for UHC.

#define uhi_aoa_dev_sel (&uhi_aoa_dev)

Current USB device AOA selected by the UHI AOA.

void main_event_aoa	(	uhc_device_t *	,
		bool
	)

Takes care of Devices being attached/detached.

bool uhi_aoa_configure ( uhc_device_t * )

Tries to configure bulk Endpoints for the Android Accessory.

Returns: true, if Configuration was successful

void uhi_aoa_enable ( uhc_device_t * dev )

References AOA_ENABLE_STAGE_PROCESSING, AOA_ENABLE_STAGE_SUCCESSFUL, uhi_aoa_dev_t::dev, uhi_aoa_enable_stage, uhi_aoa_enable_success(), and uhi_aoa_mode_enable_step1().

static void uhi_aoa_enable_success ( void )

static

Function to end AoA enabling success.

Called when the process of trying to enable the device in Accessory Mode with success.

References uhi_aoa_dev_t::dev, and uhi_aoa_protocol.

Referenced by uhi_aoa_enable(), and uhi_aoa_mode_enable_complete().

uhc_enum_status_t uhi_aoa_install ( uhc_device_t * dev )

Functions required by UHC.

References uhc_device_t::address, AOA_ACCESSORY_ADB_PID, AOA_ACCESSORY_AUDIO_ADB_PID, AOA_ACCESSORY_AUDIO_PID, AOA_ACCESSORY_PID, AOA_ENABLE_STAGE_PROCESSING, AOA_ENABLE_STAGE_SUCCESSFUL, AOA_V2_SUPPORT, Assert, usb_iface_desc_t::bDescriptorType, usb_ep_desc_t::bEndpointAddress, usb_iface_desc_t::bInterfaceClass, usb_iface_desc_t::bLength, CLASS_VENDOR_SPECIFIC, uhc_device_t::conf_desc, dev, uhi_aoa_dev_t::dev, uhc_device_t::dev_desc, uhi_aoa_dev_t::ep_in, uhi_aoa_dev_t::ep_out, GOOGLE_VID, usb_dev_desc_t::idProduct, usb_dev_desc_t::idVendor, le16_to_cpu, NULL, uhc_device_t::speed, UHC_ENUM_HARDWARE_LIMIT, UHC_ENUM_SOFTWARE_LIMIT, UHC_ENUM_SUCCESS, UHC_ENUM_UNSUPPORTED, uhd_ep_alloc(), uhd_ep_free(), uhi_aoa_enable_stage, USB_DT_ENDPOINT, USB_DT_INTERFACE, USB_EP_DIR_IN, and usb_conf_desc_t::wTotalLength.

void uhi_aoa_mode_enable_complete	(	usb_add_t	add,
		uhd_trans_status_t	status,
		uint16_t	payload_trans
	)

Function to enable the Accessory Mode on Android Devices.

Called when the process of trying to start the device in Accessory Mode is finished.
Determines whether the process of starting in Accessory Mode was successful
Does NOT check if the device is in Accessory Mode. That happens later

References AOA_ENABLE_STAGE_FAILED, AOA_ENABLE_STAGE_SUCCESSFUL, UHD_TRANS_NOERROR, uhi_aoa_enable_stage, and uhi_aoa_enable_success().

Referenced by uhi_aoa_mode_enable_step3().

void uhi_aoa_mode_enable_step1 ( uhc_device_t * dev )

Function to enable the Accessory Mode on Android Devices.

Implements step one of starting the Device in Accessory Mode
Checks the Protocol Version on the Android Device
Calls step two of starting the Device in Accessory Mode

References uhc_device_t::address, usb_setup_req_t::bmRequestType, usb_setup_req_t::bRequest, dev, uhi_aoa_dev_t::dev, NULL, uhd_setup_request(), uhi_aoa_mode_enable_step2(), uhi_aoa_protocol, USB_REQ_AOA_GET_PROTOCOL, USB_REQ_DIR_IN, USB_REQ_RECIP_DEVICE, USB_REQ_TYPE_VENDOR, usb_setup_req_t::wIndex, usb_setup_req_t::wLength, and usb_setup_req_t::wValue.

Referenced by uhi_aoa_enable().

void uhi_aoa_mode_enable_step2	(	usb_add_t	add,
		uhd_trans_status_t	status,
		uint16_t	payload_trans
	)

Function to enable the Accessory Mode on Android Devices.

Implements steps two and three of starting the Device in Accessory Mode
Sends the Identifying Information as Strings
Calls step three of starting the Device in Accessory Mode

References AOA_ENABLE_STAGE_FAILED, AOA_STRING_DESCRIPTION, AOA_STRING_INDEX_DESCRIPTION, AOA_STRING_INDEX_MANUFACTURER, AOA_STRING_INDEX_MODEL, AOA_STRING_INDEX_SERIAL, AOA_STRING_INDEX_URL, AOA_STRING_INDEX_VERSION, AOA_STRING_MANUFACTURER, AOA_STRING_MODEL, AOA_STRING_SERIAL, AOA_STRING_URL, AOA_STRING_VERSION, le16_to_cpu, NULL, UHD_TRANS_NOERROR, uhi_aoa_enable_stage, uhi_aoa_mode_enable_step3(), uhi_aoa_protocol, and uhi_aoa_send_info_string().

Referenced by uhi_aoa_mode_enable_step1().

void uhi_aoa_mode_enable_step3	(	usb_add_t	add,
		uhd_trans_status_t	status,
		uint16_t	payload_trans
	)

Function to enable the Accessory Mode on Android Devices.

Implements step three of starting the Device in Accessory Mode
Sends the Request to Startup in Accessory Mode
Calls last step of starting the Device in Accessory Mode

References uhc_device_t::address, AOA_ENABLE_STAGE_FAILED, usb_setup_req_t::bmRequestType, usb_setup_req_t::bRequest, uhi_aoa_dev_t::dev, NULL, uhd_setup_request(), UHD_TRANS_NOERROR, uhi_aoa_enable_stage, uhi_aoa_mode_enable_complete(), USB_REQ_AOA_STARTUP, USB_REQ_DIR_OUT, USB_REQ_RECIP_DEVICE, USB_REQ_TYPE_VENDOR, usb_setup_req_t::wIndex, usb_setup_req_t::wLength, and usb_setup_req_t::wValue.

Referenced by uhi_aoa_mode_enable_step2().

bool uhi_aoa_read	(	uint8_t *	payload,
		uint16_t	payload_size,
		uhd_callback_trans_t	callback_end
	)

Main Function to receive a message from an Android device.

Parameters

payload	Pointer on the data to transfer
payload_size	Size of the data to transfer
callback_end	Callback to call at the end of transfer

References uhc_device_t::address, uhi_aoa_dev_t::dev, uhi_aoa_dev_t::ep_in, and uhd_ep_run().

bool uhi_aoa_register_hid	(	uint16_t	id,
		uint8_t *	hid_rpt_desc,
		uint16_t	hid_rpt_desc_len
	)

Register a HID device.

Parameters

[in]	id	ID for the HID device
[in]	hid_rpt_desc	Pointer to the HID report descriptor
[in]	hid_rpt_desc_len	Total length of the HID report descriptor

References uhc_device_t::address, AOA_ENABLE_STAGE_SUCCESSFUL, usb_dev_desc_t::bMaxPacketSize0, usb_setup_req_t::bmRequestType, usb_setup_req_t::bRequest, cpu_to_le16, uhi_aoa_dev_t::dev, uhc_device_t::dev_desc, NULL, uhd_setup_request(), uhi_aoa_enable_stage, USB_REQ_AOA_REGISTER_HID, USB_REQ_AOA_SET_HID_RPT_DESC, USB_REQ_DIR_OUT, USB_REQ_RECIP_DEVICE, USB_REQ_TYPE_VENDOR, usb_setup_req_t::wIndex, usb_setup_req_t::wLength, and usb_setup_req_t::wValue.

bool uhi_aoa_send_hid_event	(	uint16_t	id,
		void *	hid_rpt,
		uint16_t	rpt_size
	)

Send HID events.

Parameters

[in]	id	ID for the HID device
[in]	hid_rpt	Pointer to the HID report for the event, the report format and data length should follow what is defined in HID report descriptor.
[in]	rpt_size	The HID report size

References uhc_device_t::address, usb_setup_req_t::bmRequestType, usb_setup_req_t::bRequest, cpu_to_le16, uhi_aoa_dev_t::dev, NULL, uhd_setup_request(), USB_REQ_AOA_SEND_HID_EVENT, USB_REQ_DIR_OUT, USB_REQ_RECIP_DEVICE, USB_REQ_TYPE_VENDOR, usb_setup_req_t::wIndex, usb_setup_req_t::wLength, and usb_setup_req_t::wValue.