mykey.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 #include <stdbool.h>
  28 #include <avr/io.h>
  29 #include <avr/pgmspace.h>
  30 #include <avr/interrupt.h>
  31 #include <util/delay.h>
  32
  33 #include "usb_device.h"
  34 #include "print.h"
  35 #include "matrix.h"
  36 #include "keymap.h"
  37 #include "jump_bootloader.h"
  38
  39 #define LED_CONFIG    (DDRD |= (1<<6))
  40 #define LED_ON        (PORTD &= ~(1<<6))
  41 #define LED_OFF        (PORTD |= (1<<6))
  42 #define CPU_PRESCALE(n)    (CLKPR = 0x80, CLKPR = (n))
  43
  44 static void print_matrix(void);
  45
  46
  47 uint16_t idle_count=0;
  48
  49
  50
  51 int main(void)
  52 {
  53     bool modified = false;
  54     bool has_ghost = false;
  55     uint8_t key_index = 0;
  56
  57     // set for 16 MHz clock
  58     CPU_PRESCALE(0);
  59
  60     matrix_init();
  61
  62
  63     // Initialize the USB, and then wait for the host to set configuration.
  64     // If the Teensy is powered without a PC connected to the USB port,
  65     // this will wait forever.
  66     usb_init();
  67     while (!usb_configured()) /* wait */ ;
  68
  69     // Wait an extra second for the PC's operating system to load drivers
  70     // and do whatever it does to actually be ready for input
  71     _delay_ms(1000);
  72
  73     // Configure timer 0 to generate a timer overflow interrupt every
  74     // 256*1024 clock cycles, or approx 61 Hz when using 16 MHz clock
  75     // This demonstrates how to use interrupts to implement a simple
  76     // inactivity timeout.
  77     TCCR0A = 0x00;
  78     TCCR0B = 0x05;
  79     TIMSK0 = (1<<TOIE0);
  80
  81     print("firmware 0.2 for t.m.k.\n");
  82
  83     int loop_count = 0;
  84     while (1) {
  85         int layer = 0;
  86
  87         matrix_scan();
  88         layer = get_layer();
  89
  90         modified = matrix_is_modified();
  91         has_ghost = matrix_has_ghost();
  92
  93         // doesnt send keys during ghost occurs
  94         if (modified && !has_ghost) {
  95             key_index = 0;
  96             keyboard_modifier_keys = 0;
  97             for (int i = 0; i < 6; i++) keyboard_keys[i] = KB_NO;
  98
  99             for (int row = 0; row < MATRIX_ROWS; row++) {
 100                 for (int col = 0; col < MATRIX_COLS; col++) {
 101                     if (matrix[row] & 1<<col) continue;
 102
 103                     uint8_t code = get_keycode(layer, row, col);
 104                     if (code == KB_NO) {
 105                         continue;
 106                     } else if (KB_LCTRL <= code && code <= KB_RGUI) {
 107                         // modifier keycode: 0xE0-0xE7
 108                         keyboard_modifier_keys |= 1<<(code & 0x07);
 109                     } else {
 110                         if (key_index < 6)
 111                             keyboard_keys[key_index] = code;
 112                         key_index++;
 113                     }
 114                 }
 115             }
 116
 117             // run bootloader when 4 left modifier keys down
 118             if (keyboard_modifier_keys == (MOD_LCTRL | MOD_LSHIFT | MOD_LALT | MOD_LGUI)) {
 119                 // cancel all keys
 120                 keyboard_modifier_keys = 0;
 121                 for (int i = 0; i < 6; i++) keyboard_keys[i] = KB_NO;
 122                 usb_keyboard_send();
 123
 124                 print("jump to bootloader...\n");
 125                 _delay_ms(1000);
 126                 jump_bootloader();
 127             }
 128
 129             if (key_index > 6) {
 130                 //Rollover
 131             }
 132
 133             usb_keyboard_send();
 134
 135
 136             // variables shared with interrupt routines must be
 137             // accessed carefully so the interrupt routine doesn't
 138             // try to use the variable in the middle of our access
 139             cli();
 140             //idle_count = 0;
 141             sei();
 142         }
 143
 144         // print matrix state for debug
 145         if (modified) {
 146             print_matrix();
 147
 148             // LED flush
 149             DDRD |= 1<<PD6;
 150             PORTD |= 1<<PD6;
 151         }
 152
 153 /*
 154         // print counts for debug
 155         if ((loop_count % 0x1000) == 0) {
 156             //print(".");
 157             print("idle_count: "); phex((idle_count & 0xFF00) >> 8); phex(idle_count & 0xFF); print("\n");
 158             print("loop_count: "); phex((loop_count & 0xFF00) >> 8); phex(loop_count & 0xFF); print("\n");
 159             print_matrix();
 160         }
 161
 162         // teensy LED flush for debug
 163         if ((loop_count & 0x100) == 0) {
 164             DDRD |= 1<<PD6;
 165             PORTD |= 1<<PD6;
 166         }
 167 */
 168
 169         // now the current pins will be the previous, and
 170         // wait a short delay so we're not highly sensitive
 171         // to mechanical "bounce".
 172         _delay_ms(2);
 173         loop_count++;
 174     }
 175 }
 176
 177 static void print_matrix(void) {
 178             print("\nr/c 01234567\n");
 179             for (int row = 0; row < MATRIX_ROWS; row++) {
 180                 phex(row); print(": ");
 181                 pbin_reverse(matrix[row]);
 182                 if (matrix_has_ghost_in_row(row)) {
 183                     print(" <ghost");
 184                 }
 185                 print("\n");
 186             }
 187             print("keys: ");
 188             for (int i = 0; i < 6; i++) { phex(keyboard_keys[i]); print(" "); }
 189             print("\n");
 190             print("mod: "); phex(keyboard_modifier_keys); print("\n");
 191 }
 192
 193 // This interrupt routine is run approx 61 times per second.
 194 // A very simple inactivity timeout is implemented, where we
 195 // will send a space character and print a message to the
 196 // hid_listen debug message window.
 197 ISR(TIMER0_OVF_vect)
 198 {
 199     idle_count++;
 200 }