765 lines
19 KiB
C++
765 lines
19 KiB
C++
/* USB API for Teensy USB Development Board
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* http://www.pjrc.com/teensy/teensyduino.html
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* Copyright (c) 2011 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 <avr/io.h>
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#include <avr/pgmspace.h>
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#include <stdint.h>
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#include "usb_common.h"
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#include "usb_private.h"
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#include "usb_api.h"
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#include "wiring.h"
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int usb_rawhid_class::available(void)
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{
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uint8_t n=0, i, intr_state;
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intr_state = SREG;
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cli();
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if (usb_configuration) {
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UENUM = RAWHID_RX_ENDPOINT;
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n = UEBCLX;
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}
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SREG = intr_state;
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return n;
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}
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// receive a packet, with timeout
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int usb_rawhid_class::recv(void *ptr, uint16_t timeout)
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{
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uint8_t *buffer = (uint8_t *)ptr;
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uint8_t intr_state;
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// if we're not online (enumerated and configured), error
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if (!usb_configuration) return -1;
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intr_state = SREG;
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cli();
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rawhid_rx_timeout_count = timeout;
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UENUM = RAWHID_RX_ENDPOINT;
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// wait for data to be available in the FIFO
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while (1) {
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if (UEINTX & (1<<RWAL)) break;
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SREG = intr_state;
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if (rawhid_rx_timeout_count == 0) return 0;
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if (!usb_configuration) return -1;
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intr_state = SREG;
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cli();
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UENUM = RAWHID_RX_ENDPOINT;
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}
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// read bytes from the FIFO
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#if (RAWHID_RX_SIZE >= 64)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 63)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 62)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 61)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 60)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 59)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 58)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 57)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 56)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 55)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 54)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 53)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 52)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 51)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 50)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 49)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 48)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 47)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 46)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 45)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 44)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 43)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 42)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 41)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 40)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 39)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 38)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 37)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 36)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 35)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 34)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 33)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 32)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 31)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 30)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 29)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 28)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 27)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 26)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 25)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 24)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 23)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 22)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 21)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 20)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 19)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 18)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 17)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 16)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 15)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 14)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 13)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 12)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 11)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 10)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 9)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 8)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 7)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 6)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 5)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 4)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 3)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 2)
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*buffer++ = UEDATX;
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#endif
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#if (RAWHID_RX_SIZE >= 1)
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*buffer++ = UEDATX;
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#endif
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// release the buffer
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UEINTX = 0x6B;
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SREG = intr_state;
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return RAWHID_RX_SIZE;
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}
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// send a packet, with timeout
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int usb_rawhid_class::send(const void *ptr, uint16_t timeout)
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{
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const uint8_t *buffer = (const uint8_t *)ptr;
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uint8_t intr_state;
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// if we're not online (enumerated and configured), error
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if (!usb_configuration) return -1;
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intr_state = SREG;
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cli();
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rawhid_tx_timeout_count = timeout;
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UENUM = RAWHID_TX_ENDPOINT;
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// wait for the FIFO to be ready to accept data
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while (1) {
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if (UEINTX & (1<<RWAL)) break;
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SREG = intr_state;
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if (rawhid_tx_timeout_count == 0) return 0;
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if (!usb_configuration) return -1;
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intr_state = SREG;
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cli();
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UENUM = RAWHID_TX_ENDPOINT;
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}
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// write bytes from the FIFO
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#if (RAWHID_TX_SIZE >= 64)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 63)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 62)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 61)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 60)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 59)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 58)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 57)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 56)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 55)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 54)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 53)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 52)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 51)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 50)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 49)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 48)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 47)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 46)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 45)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 44)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 43)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 42)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 41)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 40)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 39)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 38)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 37)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 36)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 35)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 34)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 33)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 32)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 31)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 30)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 29)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 28)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 27)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 26)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 25)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 24)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 23)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 22)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 21)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 20)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 19)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 18)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 17)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 16)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 15)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 14)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 13)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 12)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 11)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 10)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 9)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 8)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 7)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 6)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 5)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 4)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 3)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 2)
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UEDATX = *buffer++;
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#endif
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#if (RAWHID_TX_SIZE >= 1)
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UEDATX = *buffer++;
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#endif
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// transmit it now
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UEINTX = 0x3A;
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SREG = intr_state;
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return RAWHID_TX_SIZE;
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}
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static volatile uint8_t prev_byte=0;
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void usb_serial_class::begin(long speed)
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{
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// make sure USB is initialized
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usb_init();
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uint16_t begin_wait = (uint16_t)millis();
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while (1) {
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if (usb_configuration) {
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delay(200); // a little time for host to load a driver
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return;
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}
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if (usb_suspended) {
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uint16_t begin_suspend = (uint16_t)millis();
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while (usb_suspended) {
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// must remain suspended for a while, because
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// normal USB enumeration causes brief suspend
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// states, typically under 0.1 second
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if ((uint16_t)millis() - begin_suspend > 250) {
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return;
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}
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}
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}
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// ... or a timout (powered by a USB power adaptor that
|
|
// wiggles the data lines to keep a USB device charging)
|
|
if ((uint16_t)millis() - begin_wait > 2500) return;
|
|
}
|
|
prev_byte = 0;
|
|
}
|
|
|
|
void usb_serial_class::end()
|
|
{
|
|
usb_shutdown();
|
|
delay(25);
|
|
}
|
|
|
|
|
|
|
|
// number of bytes available in the receive buffer
|
|
int usb_serial_class::available()
|
|
{
|
|
uint8_t c;
|
|
|
|
c = prev_byte; // assume 1 byte static volatile access is atomic
|
|
if (c) return 1;
|
|
c = readnext();
|
|
if (c) {
|
|
prev_byte = c;
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
// get the next character, or -1 if nothing received
|
|
int usb_serial_class::read()
|
|
{
|
|
uint8_t c;
|
|
|
|
c = prev_byte;
|
|
if (c) {
|
|
prev_byte = 0;
|
|
return c;
|
|
}
|
|
c = readnext();
|
|
if (c) return c;
|
|
return -1;
|
|
}
|
|
|
|
int usb_serial_class::peek()
|
|
{
|
|
uint8_t c;
|
|
|
|
c = prev_byte;
|
|
if (c) return c;
|
|
c = readnext();
|
|
if (c) {
|
|
prev_byte = c;
|
|
return c;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
// get the next character, or 0 if nothing
|
|
uint8_t usb_serial_class::readnext(void)
|
|
{
|
|
uint8_t c, intr_state;
|
|
|
|
// interrupts are disabled so these functions can be
|
|
// used from the main program or interrupt context,
|
|
// even both in the same program!
|
|
intr_state = SREG;
|
|
cli();
|
|
if (!usb_configuration) {
|
|
SREG = intr_state;
|
|
return 0;
|
|
}
|
|
UENUM = DEBUG_RX_ENDPOINT;
|
|
try_again:
|
|
if (!(UEINTX & (1<<RWAL))) {
|
|
// no packet in buffer
|
|
SREG = intr_state;
|
|
return 0;
|
|
}
|
|
// take one byte out of the buffer
|
|
c = UEDATX;
|
|
if (c == 0) {
|
|
// if we see a zero, discard it and
|
|
// discard the rest of this packet
|
|
UEINTX = 0x6B;
|
|
goto try_again;
|
|
}
|
|
// if this drained the buffer, release it
|
|
if (!(UEINTX & (1<<RWAL))) UEINTX = 0x6B;
|
|
SREG = intr_state;
|
|
return c;
|
|
}
|
|
|
|
// discard any buffered input
|
|
void usb_serial_class::flush()
|
|
{
|
|
uint8_t intr_state;
|
|
|
|
if (usb_configuration) {
|
|
intr_state = SREG;
|
|
cli();
|
|
UENUM = DEBUG_RX_ENDPOINT;
|
|
while ((UEINTX & (1<<RWAL))) {
|
|
UEINTX = 0x6B;
|
|
}
|
|
SREG = intr_state;
|
|
}
|
|
prev_byte = 0;
|
|
}
|
|
|
|
// transmit a character.
|
|
#if ARDUINO >= 100
|
|
size_t usb_serial_class::write(uint8_t c)
|
|
#else
|
|
void usb_serial_class::write(uint8_t c)
|
|
#endif
|
|
{
|
|
//static uint8_t previous_timeout=0;
|
|
uint8_t timeout, intr_state;
|
|
|
|
// if we're not online (enumerated and configured), error
|
|
if (!usb_configuration) goto error;
|
|
// interrupts are disabled so these functions can be
|
|
// used from the main program or interrupt context,
|
|
// even both in the same program!
|
|
intr_state = SREG;
|
|
cli();
|
|
UENUM = DEBUG_TX_ENDPOINT;
|
|
// if we gave up due to timeout before, don't wait again
|
|
#if 0
|
|
// this seems to be causig a lockup... why????
|
|
if (previous_timeout) {
|
|
if (!(UEINTX & (1<<RWAL))) {
|
|
SREG = intr_state;
|
|
return;
|
|
}
|
|
previous_timeout = 0;
|
|
}
|
|
#endif
|
|
// wait for the FIFO to be ready to accept data
|
|
timeout = UDFNUML + TRANSMIT_TIMEOUT;
|
|
while (1) {
|
|
// are we ready to transmit?
|
|
if (UEINTX & (1<<RWAL)) break;
|
|
SREG = intr_state;
|
|
// have we waited too long? This happens if the user
|
|
// is not running an application that is listening
|
|
if (UDFNUML == timeout) {
|
|
//previous_timeout = 1;
|
|
goto error;
|
|
}
|
|
// has the USB gone offline?
|
|
if (!usb_configuration) goto error;
|
|
// get ready to try checking again
|
|
intr_state = SREG;
|
|
cli();
|
|
UENUM = DEBUG_TX_ENDPOINT;
|
|
}
|
|
// actually write the byte into the FIFO
|
|
UEDATX = c;
|
|
// if this completed a packet, transmit it now!
|
|
if (!(UEINTX & (1<<RWAL))) {
|
|
UEINTX = 0x3A;
|
|
debug_flush_timer = 0;
|
|
} else {
|
|
debug_flush_timer = TRANSMIT_FLUSH_TIMEOUT;
|
|
}
|
|
SREG = intr_state;
|
|
#if ARDUINO >= 100
|
|
return 1;
|
|
#endif
|
|
error:
|
|
#if ARDUINO >= 100
|
|
setWriteError();
|
|
return 0;
|
|
#else
|
|
return;
|
|
#endif
|
|
}
|
|
|
|
|
|
// These are Teensy-specific extensions to the Serial object
|
|
|
|
// immediately transmit any buffered output.
|
|
// This doesn't actually transmit the data - that is impossible!
|
|
// USB devices only transmit when the host allows, so the best
|
|
// we can do is release the FIFO buffer for when the host wants it
|
|
void usb_serial_class::send_now(void)
|
|
{
|
|
uint8_t intr_state;
|
|
|
|
intr_state = SREG;
|
|
cli();
|
|
if (debug_flush_timer) {
|
|
UENUM = DEBUG_TX_ENDPOINT;
|
|
while ((UEINTX & (1<<RWAL))) {
|
|
UEDATX = 0;
|
|
}
|
|
UEINTX = 0x3A;
|
|
debug_flush_timer = 0;
|
|
}
|
|
SREG = intr_state;
|
|
}
|
|
|
|
uint32_t usb_serial_class::baud(void)
|
|
{
|
|
return ((uint32_t)DEBUG_TX_SIZE * 10000 / DEBUG_TX_INTERVAL);
|
|
}
|
|
|
|
uint8_t usb_serial_class::stopbits(void)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
uint8_t usb_serial_class::paritytype(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
uint8_t usb_serial_class::numbits(void)
|
|
{
|
|
return 8;
|
|
}
|
|
|
|
uint8_t usb_serial_class::dtr(void)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
uint8_t usb_serial_class::rts(void)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
usb_serial_class::operator bool()
|
|
{
|
|
if (usb_configuration) return true;
|
|
return false;
|
|
}
|
|
|
|
|
|
|
|
// Preinstantiate Objects //////////////////////////////////////////////////////
|
|
|
|
usb_serial_class Serial = usb_serial_class();
|
|
usb_rawhid_class RawHID = usb_rawhid_class();
|
|
|