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- /* Keyboard example with debug channel, for Teensy USB Development Board
- * http://www.pjrc.com/teensy/usb_keyboard.html
- * Copyright (c) 2008 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/io.h>
- #include <avr/pgmspace.h>
- #include <avr/interrupt.h>
- #include <util/delay.h>
- #include "usb_keyboard_debug.h"
- #include "print.h"
- #include "keymap.h"
-
- #define LED_CONFIG (DDRD |= (1<<6))
- #define LED_ON (PORTD &= ~(1<<6))
- #define LED_OFF (PORTD |= (1<<6))
- #define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
-
- uint8_t number_keys[10]=
- {KEY_0,KEY_1,KEY_2,KEY_3,KEY_4,KEY_5,KEY_6,KEY_7,KEY_8,KEY_9};
-
- uint16_t idle_count=0;
-
-
-
- //
- // scan matrix
- //
- uint8_t MAX_ROW = 9;
-
- // initialize ports for matrix
- void port_setup(void)
- {
- // Column: input w/pullup
- DDRB = 0x00;
- PORTB = 0xFF;
-
- // Row: Hi-Z(unselected)
- // PD:0,1,2,3,6,7
- // PC:6,7
- // PF:7
- DDRD = 0x00;
- PORTD = 0x00;
- DDRC = 0x00;
- PORTC = 0x00;
- DDRF = 0x00;
- PORTF = 0x00;
- }
-
- // select a row of matrix for read
- void select_row(uint8_t row)
- {
- switch (row) {
- case 0:
- DDRD = (1<<0);
- PORTD = 0x00;
- DDRC = 0x00;
- PORTC = 0x00;
- DDRF = 0x00;
- PORTF = 0x00;
- break;
- case 1:
- DDRD = (1<<1);
- PORTD = 0x00;
- DDRC = 0x00;
- PORTC = 0x00;
- DDRF = 0x00;
- PORTF = 0x00;
- break;
- case 2:
- DDRD = (1<<2);
- PORTD = 0x00;
- DDRC = 0x00;
- PORTC = 0x00;
- DDRF = 0x00;
- PORTF = 0x00;
- break;
- case 3:
- DDRD = (1<<3);
- PORTD = 0x00;
- DDRC = 0x00;
- PORTC = 0x00;
- DDRF = 0x00;
- PORTF = 0x00;
- break;
- case 4:
- DDRD = (1<<6);
- PORTD = 0x00;
- DDRC = 0x00;
- PORTC = 0x00;
- DDRF = 0x00;
- PORTF = 0x00;
- break;
- case 5:
- DDRD = (1<<7);
- PORTD = 0x00;
- DDRC = 0x00;
- PORTC = 0x00;
- DDRF = 0x00;
- PORTF = 0x00;
- break;
- case 6:
- DDRD = 0x00;
- PORTD = 0x00;
- DDRC = (1<<6);
- PORTC = 0x00;
- DDRF = 0x00;
- PORTF = 0x00;
- break;
- case 7:
- DDRD = 0x00;
- PORTD = 0x00;
- DDRC = (1<<7);
- PORTC = 0x00;
- DDRF = 0x00;
- PORTF = 0x00;
- break;
- case 8:
- DDRD = 0x00;
- PORTD = 0x00;
- DDRC = 0x00;
- PORTC = 0x00;
- DDRF = (1<<7);
- PORTF = 0x00;
- break;
- }
- }
-
- uint8_t read_col(void)
- {
- return PINB;
- }
-
- int main(void)
- {
- uint8_t i, reset_idle;
- uint8_t prev_state[MAX_ROW];
- for (int i=0; i < MAX_ROW; i++) prev_state[i] = 0xFF;
-
- // set for 16 MHz clock
- CPU_PRESCALE(0);
-
- port_setup();
-
-
- // Initialize the USB, and then wait for the host to set configuration.
- // If the Teensy is powered without a PC connected to the USB port,
- // this will wait forever.
- usb_init();
- while (!usb_configured()) /* wait */ ;
-
- // Wait an extra second for the PC's operating system to load drivers
- // and do whatever it does to actually be ready for input
- _delay_ms(1000);
-
- // Configure timer 0 to generate a timer overflow interrupt every
- // 256*1024 clock cycles, or approx 61 Hz when using 16 MHz clock
- // This demonstrates how to use interrupts to implement a simple
- // inactivity timeout.
- TCCR0A = 0x00;
- TCCR0B = 0x05;
- TIMSK0 = (1<<TOIE0);
-
- print("Begin keyboard example program\n");
- print("All Port B or Port D pins are inputs with pullup resistors.\n");
- print("Any connection to ground on Port B or D pins will result in\n");
- print("keystrokes sent to the PC (and debug messages here).\n");
-
- uint8_t col;
- uint8_t code;
- while (1) {
- reset_idle = 0;
-
- for (uint8_t r=0; r < MAX_ROW; r++) {
- select_row(r);
-
- // without this read unstable value.
- _delay_us(30);
-
- col = read_col();
- if (col != prev_state[r]) {
- prev_state[r] = col;
- phex(r);
- print(": ");
- pbin(col);
- print("\n");
-
- for (int c = 0; c < 8; c++) {
- if (col & 1<<c) continue;
- code = get_keycode(r, c);
- phex(code);
- print("\n");
- usb_keyboard_press(code, 0);
- }
-
- reset_idle = 1;
- }
- }
-
-
-
- // if any keypresses were detected, reset the idle counter
- if (reset_idle) {
- // variables shared with interrupt routines must be
- // accessed carefully so the interrupt routine doesn't
- // try to use the variable in the middle of our access
- cli();
- idle_count = 0;
- sei();
- }
-
- // now the current pins will be the previous, and
- // wait a short delay so we're not highly sensitive
- // to mechanical "bounce".
- _delay_ms(2);
- }
- }
-
- // This interrupt routine is run approx 61 times per second.
- // A very simple inactivity timeout is implemented, where we
- // will send a space character and print a message to the
- // hid_listen debug message window.
- ISR(TIMER0_OVF_vect)
- {
- idle_count++;
- if (idle_count > 61 * 8) {
- idle_count = 0;
- print("Timer Event :)\n");
- //usb_keyboard_press(KEY_SPACE, 0);
- }
- }
-
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