70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
/* 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);
|
|
}
|