/* 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); }