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/* USB Keyboard Plus Debug Channel Example for Teensy USB Development Board
* http://www.pjrc.com/teensy/usb_keyboard.html
* Copyright (c) 2009 PJRC.COM, LLC
*
* 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.
*/
#include <avr/interrupt.h>
#include <avr/pgmspace.h>
#include "usb_keycodes.h"
#include "usb_keyboard.h"
#include "print.h"
#include "debug.h"
#include "util.h"
#include "host.h"
// protocol setting from the host. We use exactly the same report
// either way, so this variable only stores the setting since we
// are required to be able to report which setting is in use.
uint8_t usb_keyboard_protocol=1;
// the idle configuration, how often we send the report to the
// host (ms * 4) even when it hasn't changed
// Windows and Linux set 0 while OS X sets 6(24ms) by SET_IDLE request.
uint8_t usb_keyboard_idle_config=125;
// count until idle timeout
uint8_t usb_keyboard_idle_count=0;
// 1=num lock, 2=caps lock, 4=scroll lock, 8=compose, 16=kana
volatile uint8_t usb_keyboard_leds=0;
static inline int8_t send_report(report_keyboard_t *report, uint8_t endpoint, uint8_t keys_start, uint8_t keys_end);
int8_t usb_keyboard_send_report(report_keyboard_t *report)
{
int8_t result = 0;
#ifdef NKRO_ENABLE
if (keyboard_nkro)
result = send_report(report, KBD2_ENDPOINT, 0, KBD2_REPORT_KEYS);
else
#endif
{
if (usb_keyboard_protocol)
result = send_report(report, KBD_ENDPOINT, 0, KBD_REPORT_KEYS);
else
result = send_report(report, KBD_ENDPOINT, 0, 6);
}
if (result) return result;
usb_keyboard_idle_count = 0;
usb_keyboard_print_report(report);
return 0;
}
void usb_keyboard_print_report(report_keyboard_t *report)
{
if (!debug_keyboard) return;
print("keys: ");
for (int i = 0; i < REPORT_KEYS; i++) { phex(report->keys[i]); print(" "); }
print(" mods: "); phex(report->mods); print("\n");
}
static inline int8_t send_report(report_keyboard_t *report, uint8_t endpoint, uint8_t keys_start, uint8_t keys_end)
{
uint8_t intr_state, timeout;
if (!usb_configured()) return -1;
intr_state = SREG;
cli();
UENUM = endpoint;
timeout = UDFNUML + 50;
while (1) {
// are we ready to transmit?
if (UEINTX & (1<<RWAL)) break;
SREG = intr_state;
// has the USB gone offline?
if (!usb_configured()) return -1;
// have we waited too long?
if (UDFNUML == timeout) return -1;
// get ready to try checking again
intr_state = SREG;
cli();
UENUM = endpoint;
}
UEDATX = report->mods;
#ifdef NKRO_ENABLE
if (!keyboard_nkro)
UEDATX = 0;
#else
UEDATX = 0;
#endif
for (uint8_t i = keys_start; i < keys_end; i++) {
UEDATX = report->keys[i];
}
UEINTX = 0x3A;
SREG = intr_state;
return 0;
}
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