| NUC472_NUC442_BSP V3.04.000 The Board Support Package for NUC472/NUC442

Functions | Variables
USB Host HID Driver Exported Functions
NUC472/NUC442 Device Driver » USB Host HID Driver » USB Host HID Driver Exported Constants » USB Host HID Driver Exported Type Define » USB Host HID Driver Exported Structures
Collaboration diagram for USB Host HID Driver Exported Functions:

## Functions
void | USBH_HidInit (void)
| Init USB Host HID driver. More...
HID_DEV_T * | USBH_HidGetDeviceList (void)
| Get a list of currently connected USB Hid devices. More...
int32_t | HID_HidGetReportDescriptor (HID_DEV_T *hdev, uint8_t *desc_buf, int buf_max_len)
| Get report descriptor request. More...
int32_t | HID_HidGetReport (HID_DEV_T *hdev, int rtp_typ, int rtp_id, uint8_t *data, int len)
| HID class standard request Get_Report request. The Get_Report request allows the host to receive a report via the Control pipe. More...
int32_t | HID_HidSetReport (HID_DEV_T *hdev, int rtp_typ, int rtp_id, uint8_t *data, int len)
| HID class standard request Set_Report request. The Set_Report request allows the host to send a report to the device, possibly setting the state of input, output, or feature controls. More...
int32_t | HID_HidGetIdle (HID_DEV_T *hdev, int rtp_id, uint8_t *idle_rate)
| HID class standard request Get_Idle request. The Get_Idle request reads the current idle rate for a particular Input report. More...
int32_t | HID_HidSetIdle (HID_DEV_T *hdev, int rtp_id, uint8_t idle_rate)
| HID class standard request Set_Idle request. The Set_Idle request silences a particular report on the Interrupt In pipe until a new event occurs or the specified amount of time passes. More...
int32_t | HID_HidGetProtocol (HID_DEV_T *hdev, uint8_t *protocol)
| HID class standard request Get_Protocol request. The Get_Protocol request reads which protocol is currently active (either the boot protocol or the report protocol.) More...
int32_t | HID_HidSetProtocol (HID_DEV_T *hdev, uint8_t protocol)
| HID class standard request Set_Protocol request. The Set_Protocol switches between the boot protocol and the report protocol (or vice versa). More...
int32_t | USBH_HidStartIntReadPipe (HID_DEV_T *hdev, HID_IR_FUNC *func)
| Start purge the USB interrupt in transfer. More...
int32_t | USBH_HidStartIntWritePipe (HID_DEV_T *hdev, HID_IW_FUNC *func)
| Start purge the USB interrupt out transfer. More...

## Variables
USB_DEV_T * | usbhid_dev::udev
int | usbhid_dev::ifnum
uint8_t | usbhid_dev::bSubClassCode
uint8_t | usbhid_dev::bProtocolCode
URB_T * | usbhid_dev::urbin
URB_T * | usbhid_dev::urbout
uint8_t | usbhid_dev::inbuf [HID_MAX_BUFFER_SIZE]
HID_IR_FUNC * | usbhid_dev::read_func
HID_IW_FUNC * | usbhid_dev::write_func
struct usbhid_dev * | usbhid_dev::next
uint8_t | usbhid_dev::client [HID_CLIENT_SIZE]

## Detailed Description

HID device structure

## Function Documentation

## ◆ HID_HidGetIdle()

int32_t HID_HidGetIdle | ( | HID_DEV_T * | hdev,
|  | int | rtp_id,
|  | uint8_t * | idle_rate
| ) |  |

HID class standard request Get_Idle request. The Get_Idle request reads the current idle rate for a particular Input report.

Parameters

  [in] | hdev | HID device
  [in] | rtp_id | Report ID
  [out] | idle_rate | An one byte buffer holds the reported idle rate.

Returns
  Success or not.

Return values

  0 | Success
  Otherwise | Failed

Definition at line 204 of file hid_core.c.

## ◆ HID_HidGetProtocol()

int32_t HID_HidGetProtocol | ( | HID_DEV_T * | hdev,
|  | uint8_t * | protocol
| ) |  |

HID class standard request Get_Protocol request. The Get_Protocol request reads which protocol is currently active (either the boot protocol or the report protocol.)

Parameters

  [in] | hdev | HID device
  [out] | protocol | An one byte buffer holds the protocol code.

Returns
  Success or not.

Return values

  0 | Success
  Otherwise | Failed

Definition at line 268 of file hid_core.c.

## ◆ HID_HidGetReport()

int32_t HID_HidGetReport | ( | HID_DEV_T * | hdev,
|  | int | rtp_typ,
|  | int | rtp_id,
|  | uint8_t * | data,
|  | int | len
| ) |  |

HID class standard request Get_Report request. The Get_Report request allows the host to receive a report via the Control pipe.

Parameters

  [in] | hdev | HID device
  [in] | rtp_typ | Report type. Valid values are: RT_INPUT RT_OUTPUT RT_FEATURE
  [in] | rtp_id | Report ID
  [out] | data | Buffer to store data retrieved from this report ID.
  [in] | len | Report length.

Returns
  Report length or error code.

Return values

  >=0 | The actual length of data obtained from this report ID.
  Otherwise | Failed

Definition at line 138 of file hid_core.c.

## ◆ HID_HidGetReportDescriptor()

int32_t HID_HidGetReportDescriptor | ( | HID_DEV_T * | hdev,
|  | uint8_t * | desc_buf,
|  | int | buf_max_len
| ) |  |

Get report descriptor request.

Parameters

  [in] | hdev | HID device
  [out] | desc_buf | The data buffer to store report descriptor.
  [in] | buf_max_len | The maximum length of desc_buf. This function will read more data than buf_max_len.

Returns
  Report descriptor length or error code.

Return values

  <0 | Failed
  Otherwise | Length of report descriptor read.

Definition at line 76 of file hid_core.c.

## ◆ HID_HidSetIdle()

int32_t HID_HidSetIdle | ( | HID_DEV_T * | hdev,
|  | int | rtp_id,
|  | uint8_t | idle_rate
| ) |  |

HID class standard request Set_Idle request. The Set_Idle request silences a particular report on the Interrupt In pipe until a new event occurs or the specified amount of time passes.

Parameters

  [in] | hdev | HID device
  [in] | rtp_id | Report ID
  [out] | idle_rate | The idle rate to be set.

Returns
  Success or not.

Return values

  0 | Success
  Otherwise | Failed

Definition at line 236 of file hid_core.c.

## ◆ HID_HidSetProtocol()

int32_t HID_HidSetProtocol | ( | HID_DEV_T * | hdev,
|  | uint8_t | protocol
| ) |  |

HID class standard request Set_Protocol request. The Set_Protocol switches between the boot protocol and the report protocol (or vice versa).

Parameters

  [in] | hdev | HID device
  [in] | protocol | The protocol to be set.

Returns
  Success or not.

Return values

  0 | Success
  Otherwise | Failed

Definition at line 299 of file hid_core.c.

## ◆ HID_HidSetReport()

int32_t HID_HidSetReport | ( | HID_DEV_T * | hdev,
|  | int | rtp_typ,
|  | int | rtp_id,
|  | uint8_t * | data,
|  | int | len
| ) |  |

HID class standard request Set_Report request. The Set_Report request allows the host to send a report to the device, possibly setting the state of input, output, or feature controls.

Parameters

  [in] | hdev | HID device
  [in] | rtp_typ | Report type. Valid values are: RT_INPUT RT_OUTPUT RT_FEATURE
  [in] | rtp_id | Report ID
  [out] | data | Buffer store data to be send.
  [in] | len | Report length.

Returns
  Written length or error code.

Return values

  >=0 | The actual length of data written to this report ID.
  Otherwise | Failed

Definition at line 174 of file hid_core.c.

## ◆ USBH_HidGetDeviceList()

HID_DEV_T * USBH_HidGetDeviceList | ( | void |  | ) |

Get a list of currently connected USB Hid devices.

Returns
  List of HID devices.

Return values

  NULL | There's no HID device found.
  Otherwise | A list of connected HID devices.

The HID devices are chained by the "next" member of HID_DEV_T.

Definition at line 262 of file hid_driver.c.

## ◆ USBH_HidInit()

void USBH_HidInit | ( | void |  | ) |

Init USB Host HID driver.

Returns
  None

Definition at line 246 of file hid_driver.c.

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## ◆ USBH_HidStartIntReadPipe()

HIDDEN_SYMBOLS int32_t USBH_HidStartIntReadPipe | ( | HID_DEV_T * | hdev,
|  | HID_IR_FUNC * | func
| ) |  |

Start purge the USB interrupt in transfer.

Parameters

  [in] | hdev | HID device
  [in] | func | The interrupt in data receiver callback function.

Returns
  Success or not.

Return values

  0 | Success
  Otherwise | Failed

Definition at line 378 of file hid_core.c.

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## ◆ USBH_HidStartIntWritePipe()

int32_t USBH_HidStartIntWritePipe | ( | HID_DEV_T * | hdev,
|  | HID_IW_FUNC * | func
| ) |  |

Start purge the USB interrupt out transfer.

Parameters

  [in] | hdev | HID device
  [in] | func | The interrupt in data transfer callback function.

Returns
  Success or not.

Return values

  0 | Success
  Otherwise | Failed

Definition at line 439 of file hid_core.c.

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## Variable Documentation

## ◆ bProtocolCode

uint8_t usbhid_dev::bProtocolCode

Interface protocol code

Definition at line 96 of file usbh_hid.h.

## ◆ bSubClassCode

uint8_t usbhid_dev::bSubClassCode

Interface subclass code

Definition at line 95 of file usbh_hid.h.

## ◆ client

uint8_t usbhid_dev::client[HID_CLIENT_SIZE]

HID device client data area

Definition at line 103 of file usbh_hid.h.

## ◆ ifnum

int usbhid_dev::ifnum

Interface numder

Definition at line 94 of file usbh_hid.h.

## ◆ inbuf

uint8_t usbhid_dev::inbuf[HID_MAX_BUFFER_SIZE]

Input buffer

Definition at line 99 of file usbh_hid.h.

## ◆ next

struct usbhid_dev* usbhid_dev::next

Point to the next HID device

Definition at line 102 of file usbh_hid.h.

## ◆ read_func

HID_IR_FUNC* usbhid_dev::read_func

Interrupt-in callback function

Definition at line 100 of file usbh_hid.h.

## ◆ udev

USB_DEV_T* usbhid_dev::udev

USB device pointer of HID_DEV_T

Definition at line 93 of file usbh_hid.h.

## ◆ urbin

URB_T* usbhid_dev::urbin

Input URB

Definition at line 97 of file usbh_hid.h.

## ◆ urbout

URB_T* usbhid_dev::urbout

Output URB

Definition at line 98 of file usbh_hid.h.

## ◆ write_func

HID_IW_FUNC* usbhid_dev::write_func

Interrupt-out callback function

Definition at line 101 of file usbh_hid.h.