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148 lines
4.8 KiB
C
148 lines
4.8 KiB
C
/* ----------------------------------------------------------------------------
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* ATMEL Microcontroller Software Support
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* ----------------------------------------------------------------------------
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* Copyright (c) 2008, Atmel Corporation
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the disclaimer below.
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*
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* Atmel's name may not be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* ----------------------------------------------------------------------------
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*/
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/** \file
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* Implementation of the HIDDKeyboardInputReport class.
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*/
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/** \addtogroup usbd_hid_key
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*@{
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*/
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/*------------------------------------------------------------------------------
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* Headers
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*------------------------------------------------------------------------------*/
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#include <HIDDKeyboard.h>
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#include <USBLib_Trace.h>
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/*------------------------------------------------------------------------------
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* Exported functions
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*------------------------------------------------------------------------------*/
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/**
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* Initializes a keyboard input report instance.
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* \param report Pointer to a HIDDKeyboardInputReport instance.
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*/
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void HIDDKeyboardInputReport_Initialize(HIDDKeyboardInputReport *report)
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{
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uint32_t i;
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report->bmModifierKeys = 0;
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for (i = 0; i < HIDDKeyboardInputReport_MAXKEYPRESSES; i++) {
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report->pressedKeys[i] = 0;
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}
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}
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/**
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* Reports a standard key as being pressed.
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* \param report Pointer to a HIDDKeyboardInputReport instance.
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* \param key Key code of the standard key.
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*/
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void HIDDKeyboardInputReport_PressStandardKey(HIDDKeyboardInputReport *report,
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uint8_t key)
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{
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/* Find first available slot */
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uint32_t i = 0;
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uint8_t found = 0;
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while ((i < HIDDKeyboardInputReport_MAXKEYPRESSES) && !found) {
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/* Free slot: no key referenced (code = 0) or ErrorRollOver */
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if ((report->pressedKeys[i] == 0)
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|| (report->pressedKeys[i] == HIDKeypad_ERRORROLLOVER)) {
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found = 1;
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report->pressedKeys[i] = key;
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}
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i++;
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}
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/* Report ErrorRollOver in all fields if too many keys are pressed */
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if (!found) {
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for (i=0; i < HIDDKeyboardInputReport_MAXKEYPRESSES; i++) {
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report->pressedKeys[i] = HIDKeypad_ERRORROLLOVER;
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}
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}
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}
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/**
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* Reports a standard key as not being pressed anymore.
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* \param report Pointer to a HIDDKeyboardInputReport instance.
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* \param key Key code of the standard key
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*/
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void HIDDKeyboardInputReport_ReleaseStandardKey(HIDDKeyboardInputReport *report,
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uint8_t key)
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{
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/* Look for key in array */
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uint32_t i = 0;
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uint8_t found = 0;
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while ((i < HIDDKeyboardInputReport_MAXKEYPRESSES) && !found) {
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if (report->pressedKeys[i] == key) {
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found = 1;
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report->pressedKeys[i] = 0;
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}
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i++;
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}
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}
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/**
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* Reports a modifier key as being currently pressed.
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* \param report Pointer to a HIDDKeyboardInputReport instance.
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* \param key Key code of the modifier key.
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*/
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void HIDDKeyboardInputReport_PressModifierKey(HIDDKeyboardInputReport *report,
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uint8_t key)
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{
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/* Set corresponding bit */
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uint8_t bit = key - HIDDKeyboardDescriptors_FIRSTMODIFIERKEY;
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report->bmModifierKeys |= 1 << bit;
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}
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/**
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* Reports a modifier key as not being pressed anymore.
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* \param report Pointer to a HIDDKeyboardInputReport instance.
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* \param key Key code of the modifier key.
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*/
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void HIDDKeyboardInputReport_ReleaseModifierKey(HIDDKeyboardInputReport *report,
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uint8_t key)
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{
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/* Clear corresponding bit */
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uint8_t bit = key - HIDDKeyboardDescriptors_FIRSTMODIFIERKEY;
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report->bmModifierKeys &= ~(1 << bit);
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}
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/**@}*/
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