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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 <util/delay.h>
#include <avr/interrupt.h>
#include "host.h"
#include "usb_extra.h"
int8_t usb_extra_send(uint8_t report_id, uint16_t data) {
uint8_t intr_state, timeout;
if (!usb_configured()) return -1;
intr_state = SREG;
cli();
UENUM = EXTRA_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 = EXTRA_ENDPOINT;
}
UEDATX = report_id;
UEDATX = data & 0xFF;
UEDATX = (data >> 8) & 0xFF;
UEINTX = 0x3A;
SREG = intr_state;
return 0;
}
int8_t usb_extra_consumer_send(uint16_t bits) { return usb_extra_send(REPORT_ID_CONSUMER, bits); }
int8_t usb_extra_system_send(uint16_t bits) { return usb_extra_send(REPORT_ID_SYSTEM, bits); }
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