diff options
Diffstat (limited to 'at91lib/usb/device/hid-keyboard/HIDDKeyboardInputReport.c')
| -rw-r--r-- | at91lib/usb/device/hid-keyboard/HIDDKeyboardInputReport.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/at91lib/usb/device/hid-keyboard/HIDDKeyboardInputReport.c b/at91lib/usb/device/hid-keyboard/HIDDKeyboardInputReport.c new file mode 100644 index 0000000..3257bdb --- /dev/null +++ b/at91lib/usb/device/hid-keyboard/HIDDKeyboardInputReport.c @@ -0,0 +1,164 @@ +/* ----------------------------------------------------------------------------
+ * 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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