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controller/USB/pjrc/usb_com.c

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/* Copyright (C) 2011 by Jacob Alexander
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
// ----- Includes -----
// Compiler Includes
#include <util/delay.h>
// AVR Includes
// Project Includes
#include <scan_loop.h>
#include "usb_keyboard_debug.h"
// Local Includes
#include "usb_com.h"
// ----- Variables -----
// which modifier keys are currently pressed
// 1=left ctrl, 2=left shift, 4=left alt, 8=left gui
// 16=right ctrl, 32=right shift, 64=right alt, 128=right gui
uint8_t USBKeys_Modifiers = 0;
// which keys are currently pressed, up to 6 keys may be down at once
uint8_t USBKeys_Array[USB_MAX_KEY_SEND] = {0,0,0,0,0,0};
// The number of keys sent to the usb in the array
uint8_t USBKeys_Sent;
// 1=num lock, 2=caps lock, 4=scroll lock, 8=compose, 16=kana
volatile uint8_t USBKeys_LEDs = 0;
// ----- Functions -----
// USB Module Setup
inline void usb_setup(void)
{
// Initialize the USB, and then wait for the host to set configuration.
// If the Teensy is powered without a PC connected to the USB port,
// this will wait forever.
usb_init();
while ( !usb_configured() ) /* wait */ ;
// Wait an extra second for the PC's operating system to load drivers
// and do whatever it does to actually be ready for input
_delay_ms(1000);
}
// USB Data Send
inline void usb_send(void)
{
// TODO undo potentially old keys
for ( uint8_t c = USBKeys_Sent; c < USBKeys_MaxSize; c++ )
USBKeys_Array[c] = 0;
// Send keypresses
usb_keyboard_send();
// Clear modifiers and keys
USBKeys_Modifiers = 0;
USBKeys_Sent = 0;
// Signal Scan Module we are finishedA
scan_finishedWithUSBBuffer( USBKeys_Sent <= USBKeys_MaxSize ? USBKeys_Sent : USBKeys_MaxSize );
}