1 /* USB Keyboard Plus Debug Channel Example for Teensy USB Development Board
2 * http://www.pjrc.com/teensy/usb_keyboard.html
3 * Copyright (c) 2009 PJRC.COM, LLC
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to deal
7 * in the Software without restriction, including without limitation the rights
8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 * copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 #include <util/delay.h>
25 #include <avr/interrupt.h>
27 #include "usb_extra.h"
30 int8_t usb_extra_send(uint8_t report_id, uint16_t data)
32 uint8_t intr_state, timeout;
34 if (!usb_configured()) return -1;
37 UENUM = EXTRA_ENDPOINT;
38 timeout = UDFNUML + 50;
40 // are we ready to transmit?
41 if (UEINTX & (1<<RWAL)) break;
43 // has the USB gone offline?
44 if (!usb_configured()) return -1;
45 // have we waited too long?
46 if (UDFNUML == timeout) return -1;
47 // get ready to try checking again
50 UENUM = EXTRA_ENDPOINT;
55 UEDATX = (data>>8)&0xFF;
62 int8_t usb_extra_consumer_send(uint16_t bits)
64 return usb_extra_send(REPORT_ID_CONSUMER, bits);
67 int8_t usb_extra_system_send(uint16_t bits)
69 return usb_extra_send(REPORT_ID_SYSTEM, bits);