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Periodic Input Reports Task
Function name
USBD_HID_OS_Init()
USBD_HID_OS_InputLock()
Operation
Creates and initializes the task and semaphores.
Locks Input report.
USBD_HID_OS_InputUnlock()
USBD_HID_OS_InputDataPend()
USBD_HID_OS_InputDataPendAbort()
USBD_HID_OS_InputDataPost()
USBD_HID_OS_OutputLock()
USBD_HID_OS_OutputUnlock()
USBD_HID_OS_OutputDataPend()
USBD_HID_OS_OutputDataPendAbort()
USBD_HID_OS_OutputDataPost()
USBD_HID_OS_TxLock()
USBD_HID_OS_TxUnlock()
USBD_HID_OS_TmrTask ()
Unlocks Input report.
Waits for Input report data write completion.
Aborts the wait for Input report data write completion.
Signals that Input report data has been sent to the host.
Locks Output report.
Unlocks Output report.
Waits for Output report data read completion.
Aborts the wait for Output report data read completion.
Signals that Output report data has been received from the host.
Locks class transmit.
Unlocks class transmit.
Task processing periodic input reports. Refer to section 9-6 “Periodic
Input Reports Task” on page 161 for more details about this task.
Table 9-9 HID OS Layer API Summary
9
9-6 PERIODIC INPUT REPORTS TASK
In order to save bandwidth, the host has the ability to silence a particular report in an
interrupt IN endpoint by limiting the reporting frequency. The host sends the SET_IDLE
request to realize this operation. The HID class implemented by Micriμm contains an
internal task responsible for respecting the reporting frequency limitation applying to one or
several input reports. Figure 9-7 shows the periodic input reports tasks functioning.
161
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