Common

General Description

Typedefs
typedef uint8_t	cyhal_usb_dev_ep_t
	USB endpoint address (consists from endpoint number and direction)
typedef void(*	cyhal_usb_dev_irq_callback_t) (void)
	Callback handler for USB Device interrupt.
typedef void(*	cyhal_usb_dev_endpoint_callback_t) (cyhal_usb_dev_ep_t endpoint)
	Callback handler for the transfer completion event for data endpoints (not applicable for endpoint 0)
typedef void(*	cyhal_usb_dev_event_callback_t) (void)
	Callback handler for the events for USB Device.
typedef void(*	cyhal_usb_dev_sof_callback_t) (uint32_t frame_number)
	Callback handler for the events for USB Device.

Enumerations
enum	cyhal_usb_dev_event_t {   CYHAL_USB_DEV_EVENT_BUS_RESET ,   CYHAL_USB_DEV_EVENT_EP0_SETUP ,   CYHAL_USB_DEV_EVENT_EP0_IN ,   CYHAL_USB_DEV_EVENT_EP0_OUT }
	Service Callback Events. More...

Functions
cy_rslt_t	cyhal_usb_dev_init (cyhal_usb_dev_t *obj, cyhal_gpio_t dp, cyhal_gpio_t dm, const cyhal_clock_t *clk)
	Initialize the USB instance. More...
void	cyhal_usb_dev_free (cyhal_usb_dev_t *obj)
	Power down the USB instance. More...
void	cyhal_usb_dev_connect (cyhal_usb_dev_t *obj)
	Make the USB device visible to the USB host. More...
void	cyhal_usb_dev_disconnect (cyhal_usb_dev_t *obj)
	Detach the USB device. More...
void	cyhal_usb_dev_suspend (cyhal_usb_dev_t *obj)
	Suspend the USB phy. More...
void	cyhal_usb_dev_resume (cyhal_usb_dev_t *obj)
	Resume the USB phy from a suspended state. More...
void	cyhal_usb_dev_set_configured (cyhal_usb_dev_t *obj)
	Set this device to the configured state. More...
void	cyhal_usb_dev_set_unconfigured (cyhal_usb_dev_t *obj)
	Leave the configured state. More...
void	cyhal_usb_dev_sof_enable (cyhal_usb_dev_t *obj, bool enable)
	Configure start of frame interrupt enablement. More...
void	cyhal_usb_dev_set_address (cyhal_usb_dev_t *obj, uint8_t address)
	Set the USBPhy's address. More...
cy_rslt_t	cyhal_usb_dev_register_irq_callback (cyhal_usb_dev_t *obj, cyhal_usb_dev_irq_callback_t callback)
	Register a USB Device callback handler. More...
void	cyhal_usb_dev_irq_enable (cyhal_usb_dev_t *obj, bool enable)
	Configure USB Device event enablement. More...
void	cyhal_usb_dev_process_irq (cyhal_usb_dev_t *obj)
	Default USB Device interrupt handler. More...
void	cyhal_usb_dev_register_event_callback (cyhal_usb_dev_t *obj, cyhal_usb_dev_event_t event, cyhal_usb_dev_event_callback_t callback)
	The USB Device event complete callback handler registration. More...
void	cyhal_usb_dev_register_sof_callback (cyhal_usb_dev_t *obj, cyhal_usb_dev_sof_callback_t callback)
	The USB Device start of frame (SOF) complete callback handler registration. More...

Enumeration Type Documentation

cyhal_usb_dev_event_t

enum cyhal_usb_dev_event_t

Service Callback Events.

Enumerator
CYHAL_USB_DEV_EVENT_BUS_RESET	Callback hooked to bus reset interrupt.
CYHAL_USB_DEV_EVENT_EP0_SETUP	Callback hooked to endpoint 0 SETUP packet interrupt.
CYHAL_USB_DEV_EVENT_EP0_IN	Callback hooked to endpoint 0 IN packet interrupt.
CYHAL_USB_DEV_EVENT_EP0_OUT	Callback hooked to endpoint 0 OUT packet interrupt.

Function Documentation

cyhal_usb_dev_init()

cy_rslt_t cyhal_usb_dev_init	(	cyhal_usb_dev_t *	obj,
		cyhal_gpio_t	dp,
		cyhal_gpio_t	dm,
		const cyhal_clock_t *	clk
	)

Initialize the USB instance.

Parameters

[out]	obj	Pointer to a USB object. The caller must allocate the memory for this object but the init function will initialize its contents.
[in]	dp	The D+ pin to initialize
[in]	dm	The D- pin to initialize
[in]	clk	The clock to use can be shared, if not provided a new clock will be allocated

Returns

The status of the initialization request

cyhal_usb_dev_free()

void cyhal_usb_dev_free

(

cyhal_usb_dev_t *

obj

)

Power down the USB instance.

Disable interrupts and stop sending events.

Parameters

[in,out]

obj

The USB device object

cyhal_usb_dev_connect()

void cyhal_usb_dev_connect

(

cyhal_usb_dev_t *

obj

)

Make the USB device visible to the USB host.

Enable either the D+ or D- pull-up so the host can detect the presence of this device.

Parameters

[in,out]

obj

The USB device object

cyhal_usb_dev_disconnect()

void cyhal_usb_dev_disconnect

(

cyhal_usb_dev_t *

obj

)

Detach the USB device.

Disable the D+ and D- pull-up and stop responding to USB traffic.

Parameters

[in,out]

obj

The USB device object

cyhal_usb_dev_suspend()

void cyhal_usb_dev_suspend

(

cyhal_usb_dev_t *

obj

)

Suspend the USB phy.

This allows the device to enter deepsleep. Any data left any USB EP buffers will be lost, when device go into deepsleep. Call cyhal_usb_dev_resume to resume USB from deepsleep.

Parameters

[in]

obj

The usb device object

cyhal_usb_dev_resume()

void cyhal_usb_dev_resume

(

cyhal_usb_dev_t *

obj

)

Resume the USB phy from a suspended state.

See also

cyhal_usb_dev_suspend

Parameters

[in]

obj

The usb device object

cyhal_usb_dev_set_configured()

void cyhal_usb_dev_set_configured

(

cyhal_usb_dev_t *

obj

)

Set this device to the configured state.

Enable added endpoints if they are not enabled already.

Parameters

[in,out]

obj

The USB device object

cyhal_usb_dev_set_unconfigured()

void cyhal_usb_dev_set_unconfigured

(

cyhal_usb_dev_t *

obj

)

Leave the configured state.

This is a notification to the USBPhy indicating that the device is leaving the configured state. The USBPhy can disable all endpoints other than endpoint 0.

Parameters

[in,out]

obj

The USB device object

cyhal_usb_dev_sof_enable()

void cyhal_usb_dev_sof_enable	(	cyhal_usb_dev_t *	obj,
		bool	enable
	)

Configure start of frame interrupt enablement.

Parameters

[in,out]	obj	The USB device object
[in]	enable	True to turn on interrupt and start calling sof callback on every frame, False to turn off interrupt and stop calling sof callback.

cyhal_usb_dev_set_address()

void cyhal_usb_dev_set_address	(	cyhal_usb_dev_t *	obj,
		uint8_t	address
	)

Set the USBPhy's address.

Parameters

[in,out]	obj	The USB device object
[in]	address	This device's USB address

cyhal_usb_dev_register_irq_callback()

cy_rslt_t cyhal_usb_dev_register_irq_callback	(	cyhal_usb_dev_t *	obj,
		cyhal_usb_dev_irq_callback_t	callback
	)

Register a USB Device callback handler.

This function will be called when the USB interrupt is triggered. This interrupt can be enabled or disabled using cyhal_usb_dev_irq_enable.

Parameters

[in,out]	obj	The USB device object
[in]	callback	The event handler function which will be invoked when the event fires

Returns

The status of the register_irq_callback request

cyhal_usb_dev_irq_enable()

void cyhal_usb_dev_irq_enable	(	cyhal_usb_dev_t *	obj,
		bool	enable
	)

Configure USB Device event enablement.

When the interrupt is enabled and triggered, the function specified by cyhal_usb_dev_register_irq_callback will be called.

Parameters

[in,out]	obj	The usb device object
[in]	enable	True to turn on events, False to turn off

cyhal_usb_dev_process_irq()

void cyhal_usb_dev_process_irq

(

cyhal_usb_dev_t *

obj

)

Default USB Device interrupt handler.

Parameters

[in,out]

obj

The USB device object

cyhal_usb_dev_register_event_callback()

void cyhal_usb_dev_register_event_callback	(	cyhal_usb_dev_t *	obj,
		cyhal_usb_dev_event_t	event,
		cyhal_usb_dev_event_callback_t	callback
	)

The USB Device event complete callback handler registration.

The events are defined by x type.

Parameters

[in,out]	obj	The USB device object
[in]	event	The event that triggers the callback, see cyhal_usb_dev_event_t
[in]	callback	The callback handler which will be invoked when the interrupt fires

cyhal_usb_dev_register_sof_callback()

void cyhal_usb_dev_register_sof_callback	(	cyhal_usb_dev_t *	obj,
		cyhal_usb_dev_sof_callback_t	callback
	)

The USB Device start of frame (SOF) complete callback handler registration.

Parameters

[in,out]	obj	The USB device object
[in]	callback	The callback handler which will be invoked when the interrupt fires