tmk.c

   1 /* 2010/08/23 noname
   2  * keyboard firmware based on PJRC USB keyboard example
   3  */
   4 /* Keyboard example with debug channel, for Teensy USB Development Board
   5  * http://www.pjrc.com/teensy/usb_keyboard.html
   6  * Copyright (c) 2008 PJRC.COM, LLC
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24  * THE SOFTWARE.
  25  */
  26
  27 // TODO: clean unused headers
  28 #include <stdbool.h>
  29 #include <avr/io.h>
  30 #include <avr/pgmspace.h>
  31 #include <avr/interrupt.h>
  32 #include <util/delay.h>
  33 #include "usb.h"
  34 #include "usb_keyboard.h"
  35 #include "usb_mouse.h"
  36 #include "print.h"
  37 #include "matrix_skel.h"
  38 #include "keymap.h"
  39 #include "jump_bootloader.h"
  40
  41 #include "key_process.h"
  42
  43 #define CPU_PRESCALE(n)    (CLKPR = 0x80, CLKPR = (n))
  44
  45 // TODO: should go to hardware dependent file
  46 // for Teensy/Teensy++ 2.0
  47 #define LED_CONFIG    (DDRD |= (1<<6))
  48 #define LED_ON        (PORTD |= (1<<6))
  49 #define LED_OFF       (PORTD &= ~(1<<6))
  50
  51
  52 uint16_t idle_count=0;
  53
  54
  55 int main(void)
  56 {
  57     // set for 16 MHz clock
  58     CPU_PRESCALE(0);
  59
  60     // Initialize the USB, and then wait for the host to set configuration.
  61     // If the Teensy is powered without a PC connected to the USB port,
  62     // this will wait forever.
  63     usb_init();
  64     while (!usb_configured()) /* wait */ ;
  65
  66     // Configure timer 0 to generate a timer overflow interrupt every
  67     // 256*1024 clock cycles, or approx 61 Hz when using 16 MHz clock
  68     // This demonstrates how to use interrupts to implement a simple
  69     // inactivity timeout.
  70     TCCR0A = 0x00;
  71     TCCR0B = 0x05;
  72     TIMSK0 = (1<<TOIE0);
  73
  74
  75     matrix_init();
  76     matrix_scan();
  77     // debug on when 4 keys are pressed
  78     if (matrix_key_count() == 4) print_enable = true;
  79
  80     /* wait for debug pipe to print greetings. */
  81     if (print_enable) {
  82         for (int i =0; i < 6; i++) {
  83             LED_CONFIG;
  84             LED_ON;
  85             _delay_ms(500);
  86             LED_OFF;
  87             _delay_ms(500);
  88         }
  89     }
  90     print("\nt.m.k. keyboard 1.2\n");
  91     while (1) {
  92        proc_matrix();
  93         _delay_ms(2);
  94     }
  95 }
  96
  97
  98 // This interrupt routine is run approx 61 times per second.
  99 // A very simple inactivity timeout is implemented, where we
 100 // will send a space character and print a message to the
 101 // hid_listen debug message window.
 102 ISR(TIMER0_OVF_vect)
 103 {
 104     idle_count++;
 105 }