NUC472_NUC442_BSP V3.03.005
The Board Support Package for NUC472/NUC442
Functions
Collaboration diagram for LW_USBH Exported Functions:

Functions

int usbh_probe_umass (void)
 Try to probe and initialize an USB mass storage device. More...
 
int usbh_drv_ctrl_req (uint8_t requesttype, uint8_t request, uint16_t value, uint16_t index, uint16_t length, int data_len, uint8_t *buffer, int dir)
 Execute a control transfer request. More...
 
int usbh_drv_bulk_xfer (uint16_t ep_addr, uint8_t *toggle, uint8_t *data_buff, int data_len, int timeout)
 Execute a control transfer request. More...
 
int usbh_get_device_descriptor (uint8_t *desc_buff)
 Get device descriptor from the USB device. More...
 
int get_config_descriptor (uint8_t *desc_buff)
 Get configuration descriptor from the USB device. More...
 
int usbh_set_configuration (int conf_val)
 Issue a standard request SET_CONFIGURATION to USB device. More...
 
int usbh_clear_halt (uint16_t ep_addr)
 Issue a standard request SET_FEATURE to clear USB device endpoint halt state. More...
 
int usbh_probe_port (uint32_t port)
 Probe USB root-hub port connect/disconnect status. A newly connected device will be initialized in this function. More...
 
int usbh_init (void)
 Initialized USB host controller driver. More...
 

Detailed Description

Function Documentation

◆ get_config_descriptor()

int get_config_descriptor ( uint8_t *  desc_buff)

Get configuration descriptor from the USB device.

Parameters
[out]desc_buffData buffer to receive configuration descriptor data.
Returns
Success or not.
Return values
0Success
OtherwiseFailed

Definition at line 493 of file lw_usbh.c.

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◆ usbh_clear_halt()

int usbh_clear_halt ( uint16_t  ep_addr)

Issue a standard request SET_FEATURE to clear USB device endpoint halt state.

Parameters
[in]ep_addrEndpoint to be clear halt.
Returns
Success or not.
Return values
0Success
OtherwiseFailed

Definition at line 542 of file lw_usbh.c.

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◆ usbh_drv_bulk_xfer()

int usbh_drv_bulk_xfer ( uint16_t  ep_addr,
uint8_t *  toggle,
uint8_t *  data_buff,
int  data_len,
int  timeout 
)

Execute a control transfer request.

Parameters
[in]ep_addrEndpoint address.
[in,out]toggleSet the last data packet toggle setting and get new data packet toggle setting
[in,out]data_buffBuffer hold the data to send and the data receive.
[in]data_lenLength in bytes of the data to send/receive
[in]timeoutTransfer time-out setting in millisecond.
Returns
Success or not.
Return values
0Success
OtherwiseFailed

Definition at line 389 of file lw_usbh.c.

◆ usbh_drv_ctrl_req()

int usbh_drv_ctrl_req ( uint8_t  requesttype,
uint8_t  request,
uint16_t  value,
uint16_t  index,
uint16_t  length,
int  data_len,
uint8_t *  buffer,
int  dir 
)

Execute a control transfer request.

Parameters
[in]requesttypeUSB message request type value
[in]requestUSB message request value
[in]valueUSB message value
[in]indexUSB message index value
[in]lengthUSB message length value
[in]data_lenlength in bytes of the data to send/receive
[in,out]bufferPointer to buffer hold the data to send and to receive.
[in]dirData transfer direction. 0 - in; 1 - out.
Returns
Success or not.
Return values
0Success
OtherwiseFailed

This function sends a simple control message to a specified endpoint and waits for the message to complete, or timeout.

If successful, it returns 0, otherwise a negative error number.

Definition at line 305 of file lw_usbh.c.

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◆ usbh_get_device_descriptor()

int usbh_get_device_descriptor ( uint8_t *  desc_buff)

Get device descriptor from the USB device.

Parameters
[out]desc_buffData buffer to receive device descriptor data.
Returns
Success or not.
Return values
0Success
OtherwiseFailed

Definition at line 456 of file lw_usbh.c.

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◆ usbh_init()

int usbh_init ( void  )

Initialized USB host controller driver.

Returns
Success or not.
Return values
0Success
OtherwiseFailed

Definition at line 767 of file lw_usbh.c.

◆ usbh_probe_port()

int usbh_probe_port ( uint32_t  port)

Probe USB root-hub port connect/disconnect status. A newly connected device will be initialized in this function.

Parameters
[in]portThe root-hub port number, 0 for port 0 and 1 for port 1.
Returns
The current port connect/disconnect status.
Return values
0A new device connected and initialized successfully.
USBH_RET_DEV_CONN_KEEPUSB device is still connected.
USBH_RET_NO_DEVICEThere's no device connected.
USBH_RET_DEV_REMOVEDA connected device had been removed.

Definition at line 590 of file lw_usbh.c.

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◆ usbh_probe_umass()

int usbh_probe_umass ( void  )

Try to probe and initialize an USB mass storage device.

Returns
Success or not.
Return values
0Success
OtherwiseFailed

Definition at line 434 of file lw_umass.c.

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◆ usbh_set_configuration()

int usbh_set_configuration ( int  conf_val)

Issue a standard request SET_CONFIGURATION to USB device.

Parameters
[in]conf_valThe configuration number to be set.
Returns
Success or not.
Return values
0Success
OtherwiseFailed

Definition at line 528 of file lw_usbh.c.

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