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- /* 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 <avr/interrupt.h>
- #include <avr/pgmspace.h>
- #include "keycode.h"
- #include "usb_keyboard.h"
- #include "print.h"
- #include "debug.h"
- #include "util.h"
- #include "host.h"
-
-
- // protocol setting from the host. We use exactly the same report
- // either way, so this variable only stores the setting since we
- // are required to be able to report which setting is in use.
- uint8_t usb_keyboard_protocol=1;
-
- // the idle configuration, how often we send the report to the
- // host (ms * 4) even when it hasn't changed
- // Windows and Linux set 0 while OS X sets 6(24ms) by SET_IDLE request.
- uint8_t usb_keyboard_idle_config=125;
-
- // count until idle timeout
- uint8_t usb_keyboard_idle_count=0;
-
- // 1=num lock, 2=caps lock, 4=scroll lock, 8=compose, 16=kana
- volatile uint8_t usb_keyboard_leds=0;
-
-
- static inline int8_t send_report(report_keyboard_t *report, uint8_t endpoint, uint8_t keys_start, uint8_t keys_end);
-
-
- int8_t usb_keyboard_send_report(report_keyboard_t *report)
- {
- int8_t result = 0;
-
- #ifdef NKRO_ENABLE
- if (keyboard_nkro)
- result = send_report(report, KBD2_ENDPOINT, 0, KBD2_SIZE);
- else
- #endif
- {
- if (usb_keyboard_protocol)
- result = send_report(report, KBD_ENDPOINT, 0, KBD_SIZE);
- else
- result = send_report(report, KBD_ENDPOINT, 0, 6);
- }
-
- if (result) return result;
- usb_keyboard_idle_count = 0;
- usb_keyboard_print_report(report);
- return 0;
- }
-
- void usb_keyboard_print_report(report_keyboard_t *report)
- {
- if (!debug_keyboard) return;
- print("keys: ");
- for (int i = 0; i < REPORT_KEYS; i++) { phex(report->keys[i]); print(" "); }
- print(" mods: "); phex(report->mods); print("\n");
- }
-
-
- static inline int8_t send_report(report_keyboard_t *report, uint8_t endpoint, uint8_t keys_start, uint8_t keys_end)
- {
- uint8_t intr_state, timeout;
-
- if (!usb_configured()) return -1;
- intr_state = SREG;
- cli();
- UENUM = 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 = endpoint;
- }
- for (uint8_t i = keys_start; i < keys_end; i++) {
- UEDATX = report->raw[i];
- }
- UEINTX = 0x3A;
- SREG = intr_state;
- return 0;
- }
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