protocol/pjrc/main.c

   1 /* Keyboard example with debug channel, for Teensy USB Development Board
   2  * http://www.pjrc.com/teensy/usb_keyboard.html
   3  * Copyright (c) 2008 PJRC.COM, LLC
   4  *
   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:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  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
  21  * THE SOFTWARE.
  22  */
  23
  24 #include <stdbool.h>
  25 #include <avr/io.h>
  26 #include <avr/interrupt.h>
  27 #include <util/delay.h>
  28 #include "keyboard.h"
  29 #include "usb.h"
  30 #include "matrix.h"
  31 #include "print.h"
  32 #include "debug.h"
  33 #include "util.h"
  34 #include "suspend.h"
  35 #include "host.h"
  36 #include "pjrc.h"
  37
  38
  39 #define CPU_PRESCALE(n)    (CLKPR = 0x80, CLKPR = (n))
  40
  41
  42 int main(void)
  43 {
  44     // set for 16 MHz clock
  45     CPU_PRESCALE(0);
  46
  47     // Initialize the USB, and then wait for the host to set configuration.
  48     // If the Teensy is powered without a PC connected to the USB port,
  49     // this will wait forever.
  50     usb_init();
  51     while (!usb_configured()) /* wait */ ;
  52
  53     keyboard_init();
  54     host_set_driver(pjrc_driver());
  55 #ifdef SLEEP_LED_ENABLE
  56     sleep_led_init();
  57 #endif
  58     while (1) {
  59         while (suspend) {
  60             suspend_power_down();
  61             if (remote_wakeup && suspend_wakeup_condition()) {
  62                 usb_remote_wakeup();
  63             }
  64         }
  65
  66         keyboard_task();
  67     }
  68 }