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