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71 lines
2.1 KiB
71 lines
2.1 KiB
/* USB Keyboard Plus Debug Channel Example for Teensy USB Development Board
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* http://www.pjrc.com/teensy/usb_keyboard.html
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* Copyright (c) 2009 PJRC.COM, LLC
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <util/delay.h>
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#include <avr/interrupt.h>
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#include "host.h"
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#include "usb_extra.h"
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int8_t usb_extra_send(uint8_t report_id, uint16_t data)
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{
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uint8_t intr_state, timeout;
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if (!usb_configured()) return -1;
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intr_state = SREG;
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cli();
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UENUM = EXTRA_ENDPOINT;
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timeout = UDFNUML + 50;
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while (1) {
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// are we ready to transmit?
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if (UEINTX & (1<<RWAL)) break;
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SREG = intr_state;
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// has the USB gone offline?
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if (!usb_configured()) return -1;
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// have we waited too long?
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if (UDFNUML == timeout) return -1;
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// get ready to try checking again
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intr_state = SREG;
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cli();
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UENUM = EXTRA_ENDPOINT;
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}
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UEDATX = report_id;
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UEDATX = data&0xFF;
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UEDATX = (data>>8)&0xFF;
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UEINTX = 0x3A;
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SREG = intr_state;
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return 0;
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}
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int8_t usb_extra_consumer_send(uint16_t bits)
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{
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return usb_extra_send(REPORT_ID_CONSUMER, bits);
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}
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int8_t usb_extra_system_send(uint16_t bits)
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{
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return usb_extra_send(REPORT_ID_SYSTEM, bits);
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}
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