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IBM T43 Files/IBM T43 Keyboard.pdf
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IBM T43 Files/IBM T43 Keyboard.pdf
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IBM T43 Files/IBM_T43_KBandTP.ino
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IBM T43 Files/IBM_T43_KBandTP.ino
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/* Copyright 2020 Frank Adams
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// This software controls a IBM ThinkPad T43 Laptop Keyboard and PS/2 Trackpoint using a Teensy 3.2 on
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// a daughterboard with a 40 pin connector.
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// This routine uses the Teensyduino "Micro-Manager Method" to send Normal and Modifier
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// keys over USB. Only the volume control multi-media keys are supported by this routine.
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// Description of Teensyduino keyboard functions is at www.pjrc.com/teensy/td_keyboard.html
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// The ps/2 code uses the USB PJRC Mouse functions at www.pjrc.com/teensy/td_mouse.html
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// The ps/2 code has a watchdog timer so the code can't hang if a clock edge is missed.
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// In the Arduino IDE, select Tools, Teensy LC. Also under Tools, select Keyboard+Mouse+Joystick
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//
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// Revision History
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// Rev 1.0 - March 23, 2020 - Original Release
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// Rev 1.1 - March 24, 2020 - Added Num pad keys
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//
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// Trackpoint signals
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#define TP_DATA 18 // ps/2 data to trackpoint
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#define TP_CLK 19 // ps/2 clock to trackpoint
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#define TP_RESET 0 // active high trackpoint reset at power up
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// Keyboard LEDs
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#define CAPS_LED 28 // Wire these 3 I/O's to the anode side of LED's
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#define NUM_LED 29 // Wire the cathode side thru a dropping resistor
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#define SCRL_LED 30 // to ground.
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#define BLINK_LED 13 // The LED on the Teensy is programmed to blink
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// Keyboard Fn key (aka HOTKEY)
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#define HOTKEY 8 // Fn key plus side
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#define HOTKEY_RTN 23 // Fn key minus side (always driven low in this routine)
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// sync signal for measuring scan frequency
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#define SYNC 27
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// Set the keyboard row & column size
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const byte rows_max = 16; // sets the number of rows in the matrix
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const byte cols_max = 8; // sets the number of columns in the matrix
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//
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// Load the normal key matrix with the Teensyduino key names described at www.pjrc.com/teensy/td_keyboard.html
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// A zero indicates no normal key at that location.
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int normal[rows_max][cols_max] = {
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{0,0,0,0,0,0,0,0},
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{0,0,KEY_PRINTSCREEN,KEY_SCROLL_LOCK,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{KEY_LEFT,KEY_PAUSE,KEY_END,0,0,KEY_HOME,KEY_UP,0},
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{0,KEY_Z,KEY_1,KEY_Q,KEY_TAB,KEY_TILDE,KEY_ESC,KEY_A},
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{0,0,KEY_PAGE_DOWN,0,0,KEY_PAGE_UP,0,0},
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{KEY_RIGHT,0,KEY_F12,0,0,KEY_INSERT,0,0},
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{KEY_DOWN,0,KEY_F11,0,0,KEY_DELETE,0,0},
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{KEY_SLASH,0,KEY_0,KEY_P,KEY_LEFT_BRACE,KEY_MINUS,KEY_QUOTE,KEY_SEMICOLON},
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{0,KEY_C,KEY_3,KEY_E,KEY_F3,KEY_F2,KEY_F4,KEY_D},
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{0,KEY_PERIOD,KEY_9,KEY_O,KEY_F7,KEY_F8,0,KEY_L},
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{KEY_B,KEY_V,KEY_4,KEY_R,KEY_T,KEY_5,KEY_G,KEY_F},
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{0,KEY_X,KEY_2,KEY_W,KEY_CAPS_LOCK,KEY_F1,0,KEY_S},
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{KEY_SPACE,KEY_ENTER,KEY_F10,0,KEY_BACKSPACE,KEY_F9,KEY_F5,KEY_BACKSLASH},
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{0,KEY_COMMA,KEY_8,KEY_I,KEY_RIGHT_BRACE,KEY_EQUAL,KEY_F6,KEY_K},
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{KEY_N,KEY_M,KEY_7,KEY_U,KEY_Y,KEY_6,KEY_H,KEY_J}
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};
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// Load the num lock key matrix which is the same as the normal matrix except for the number pad keys
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// A zero indicates no key at that location.
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int numlock[rows_max][cols_max] = {
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{0,0,0,0,0,0,0,0},
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{0,0,KEY_PRINTSCREEN,KEY_SCROLL_LOCK,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{KEY_LEFT,KEY_PAUSE,KEY_END,0,0,KEY_HOME,KEY_UP,0},
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{0,KEY_Z,KEY_1,KEY_Q,KEY_TAB,KEY_TILDE,KEY_ESC,KEY_A},
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{0,0,KEY_PAGE_DOWN,0,0,KEY_PAGE_UP,0,0},
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{KEY_RIGHT,0,KEY_F12,0,0,KEY_INSERT,0,0},
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{KEY_DOWN,0,KEY_F11,0,0,KEY_DELETE,KEY_MENU,0},
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{KEYPAD_PLUS,0,KEYPAD_SLASH,KEYPAD_ASTERIX,KEY_LEFT_BRACE,KEY_MINUS,KEY_QUOTE,KEYPAD_MINUS},
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{0,KEY_C,KEY_3,KEY_E,KEY_F3,KEY_F2,KEY_F4,KEY_D},
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{0,KEYPAD_PERIOD,KEYPAD_9,KEYPAD_6,KEY_F7,KEY_F8,0,KEYPAD_3},
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{KEY_B,KEY_V,KEY_4,KEY_R,KEY_T,KEY_5,KEY_G,KEY_F},
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{0,KEY_X,KEY_2,KEY_W,KEY_CAPS_LOCK,KEY_F1,0,KEY_S},
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{KEY_SPACE,KEY_ENTER,KEY_F10,0,KEY_BACKSPACE,KEY_F9,KEY_F5,KEY_BACKSLASH},
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{0,KEY_COMMA,KEYPAD_8,KEYPAD_5,KEY_RIGHT_BRACE,KEY_EQUAL,KEY_F6,KEYPAD_2},
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{KEY_N,KEYPAD_0,KEYPAD_7,KEYPAD_4,KEY_Y,KEY_6,KEY_H,KEYPAD_1}
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};
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// Load the modifier key matrix with key names at the correct row-column location.
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// A zero indicates no modifier key at that location.
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int modifier[rows_max][cols_max] = {
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{0,MODIFIERKEY_RIGHT_CTRL,0,0,0,MODIFIERKEY_LEFT_CTRL,0,0},
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{MODIFIERKEY_RIGHT_ALT,0,0,0,0,0,MODIFIERKEY_LEFT_ALT,0},
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{0,MODIFIERKEY_RIGHT_SHIFT,0,0,MODIFIERKEY_LEFT_SHIFT,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,MODIFIERKEY_GUI,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0}
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};
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// Load the media key matrix with key names at the correct row-column location.
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// A zero indicates no media key at that location.
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int media[rows_max][cols_max] = {
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,KEY_MEDIA_VOLUME_INC,KEY_MEDIA_VOLUME_DEC,0,0,KEY_MEDIA_MUTE},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0}
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};
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// Initialize the old_key matrix with one's.
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// 1 = key not pressed, 0 = key is pressed
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boolean old_key[rows_max][cols_max] = {
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{1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1}
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};
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//
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// Define the Teensy 3.2 I/O numbers
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//
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// Row FPC pin #
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// Teensy I/O # 22,01,21,02,20,03,04,05,06,24,07,25,33,26,32,31
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int Row_IO[rows_max] = {22,1,21,2,20,3,4,5,6,24,7,25,33,26,32,31}; // Teensy 3.2 I/O numbers for rows
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//
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// Column FPC pin #
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// Teensy I/O # 14,15,16,12,11,10,09,17
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int Col_IO[cols_max] = {14,15,16,12,11,10,9,17}; // Teensy 3.2 I/O numbers for columns
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//
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// Declare variables that will be used by functions
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boolean trackpoint_error = LOW; // sent high when track point routine times out
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boolean slots_full = LOW; // Goes high when slots 1 thru 6 contain normal keys
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// slot 1 thru slot 6 hold the normal key values to be sent over USB.
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int slot1 = 0; //value of 0 means the slot is empty and can be used.
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int slot2 = 0;
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int slot3 = 0;
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int slot4 = 0;
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int slot5 = 0;
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int slot6 = 0;
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//
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int mod_shift_l = 0; // These variables are sent over USB as modifier keys.
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int mod_shift_r = 0; // Each is either set to 0 or MODIFIER_ ...
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int mod_ctrl_l = 0;
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int mod_ctrl_r = 0;
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int mod_alt_l = 0;
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int mod_alt_r = 0;
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int mod_gui = 0;
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//
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// **************Functions common to keyboard and trackpoint**************************
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//
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// Function to set a pin to high impedance (acts like open drain output)
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void go_z(int pin)
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{
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pinMode(pin, INPUT);
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digitalWrite(pin, HIGH);
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}
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//
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// Function to set a pin as an input with a pullup
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void go_pu(int pin)
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{
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pinMode(pin, INPUT_PULLUP);
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digitalWrite(pin, HIGH);
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}
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//
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// Function to send a pin to a logic low
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void go_0(int pin)
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{
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pinMode(pin, OUTPUT);
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digitalWrite(pin, LOW);
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}
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//
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// Function to send a pin to a logic high
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void go_1(int pin)
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{
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pinMode(pin, OUTPUT);
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digitalWrite(pin, HIGH);
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}
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//
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// *****************Functions for Trackpoint***************************
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//
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// Function to send the trackpoint a byte of data (command)
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//
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void tp_write(char send_data)
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{
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unsigned int timeout = 200; // breakout of loop if over this value in msec
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elapsedMillis watchdog; // zero the watchdog timer clock
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char odd_parity = 0; // clear parity bit count
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// Enable the bus by floating the clock and data
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go_z(TP_CLK); //
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go_z(TP_DATA); //
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delayMicroseconds(250); // wait before requesting the bus
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go_0(TP_CLK); // Send the Clock line low to request to transmit data
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delayMicroseconds(100); // wait for 100 microseconds per bus spec
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go_0(TP_DATA); // Send the Data line low (the start bit)
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delayMicroseconds(1); //
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go_z(TP_CLK); // Release the Clock line so it is pulled high
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delayMicroseconds(1); // give some time to let the clock line go high
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while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low
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if (watchdog >= timeout) { //check for infinite loop
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trackpoint_error = HIGH; // set error flag
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break; // break out of infinite loop
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}
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}
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// send the 8 bits of send_data
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for (int j=0; j<8; j++) {
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if (send_data & 1) { //check if lsb is set
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go_z(TP_DATA); // send a 1 to TP
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odd_parity = odd_parity + 1; // keep running total of 1's sent
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}
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else {
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go_0(TP_DATA); // send a 0 to TP
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}
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delayMicroseconds(1); // delay to let the clock settle out
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while (digitalRead(TP_CLK) == LOW) { // loop until the clock goes high
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if (watchdog >= timeout) { //check for infinite loop
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trackpoint_error = HIGH; // set error flag
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break; // break out of infinite loop
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}
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}
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delayMicroseconds(1); // delay to let the clock settle out
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while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low
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if (watchdog >= timeout) { //check for infinite loop
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trackpoint_error = HIGH; // set error flag
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break; // break out of infinite loop
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}
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}
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send_data = send_data >> 1; // shift data right by 1 to prepare for next loop
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}
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// send the parity bit
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if (odd_parity & 1) { //check if lsb of parity is set
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go_0(TP_DATA); // already odd so send a 0 to TP
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}
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else {
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go_z(TP_DATA); // send a 1 to TP to make parity odd
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}
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delayMicroseconds(1); // delay to let the clock settle out
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while (digitalRead(TP_CLK) == LOW) { // loop until the clock goes high
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if (watchdog >= timeout) { //check for infinite loop
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trackpoint_error = HIGH; // set error flag
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break; // break out of infinite loop
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}
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}
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delayMicroseconds(1); // delay to let the clock settle out
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while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low
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if (watchdog >= timeout) { //check for infinite loop
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trackpoint_error = HIGH; // set error flag
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break; // break out of infinite loop
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}
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}
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go_z(TP_DATA); // Release the Data line so it goes high as the stop bit
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delayMicroseconds(80); // testing shows delay at least 40us
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while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low
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if (watchdog >= timeout) { //check for infinite loop
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trackpoint_error = HIGH; // set error flag
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break; // break out of infinite loop
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}
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}
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delayMicroseconds(1); // wait to let the data settle
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if (digitalRead(TP_DATA)) { // Ack bit s/b low if good transfer
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trackpoint_error = HIGH; //bad ack bit so set the error flag
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}
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while ((digitalRead(TP_CLK) == LOW) || (digitalRead(TP_DATA) == LOW)) { // loop if clock or data are low
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if (watchdog >= timeout) { //check for infinite loop
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trackpoint_error = HIGH; // set error flag
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break; // break out of infinite loop
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}
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}
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// Inhibit the bus so the tp only talks when we're listening
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go_0(TP_CLK);
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}
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//
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// Function to get a byte of data from the trackpoint
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//
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char tp_read(void)
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{
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unsigned int timeout = 200; // breakout of loop if over this value in msec
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elapsedMillis watchdog; // zero the watchdog timer clock
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char rcv_data = 0; // initialize to zero
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char mask = 1; // shift a 1 across the 8 bits to select where to load the data
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char rcv_parity = 0; // count the ones received
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go_z(TP_CLK); // release the clock
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go_z(TP_DATA); // release the data
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delayMicroseconds(5); // delay to let clock go high
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while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low
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if (watchdog >= timeout) { //check for infinite loop
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trackpoint_error = HIGH; // set error flag
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break; // break out of infinite loop
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}
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}
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if (digitalRead(TP_DATA)) { // Start bit s/b low from tp
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trackpoint_error = HIGH; // No start bit so set the error flag
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}
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delayMicroseconds(1); // delay to let the clock settle out
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while (digitalRead(TP_CLK) == LOW) { // loop until the clock goes high
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if (watchdog >= timeout) { //check for infinite loop
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trackpoint_error = HIGH; // set error flag
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break; // break out of infinite loop
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}
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}
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for (int k=0; k<8; k++) {
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delayMicroseconds(1); // delay to let the clock settle out
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while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low
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if (watchdog >= timeout) { //check for infinite loop
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trackpoint_error = HIGH; // set error flag
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break; // break out of infinite loop
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}
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}
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if (digitalRead(TP_DATA)) { // check if data is high
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rcv_data = rcv_data | mask; // set the appropriate bit in the rcv data
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rcv_parity++; // increment the parity bit counter
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}
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mask = mask << 1;
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delayMicroseconds(1); // delay to let the clock settle out
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while (digitalRead(TP_CLK) == LOW) { // loop until the clock goes high
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if (watchdog >= timeout) { //check for infinite loop
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trackpoint_error = HIGH; // set error flag
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break; // break out of infinite loop
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}
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}
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}
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// receive parity
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delayMicroseconds(1); // delay to let the clock settle out
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while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low
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if (watchdog >= timeout) { //check for infinite loop
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trackpoint_error = HIGH; // set error flag
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break; // break out of infinite loop
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}
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}
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if (digitalRead(TP_DATA)) { // check if received parity is high
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rcv_parity++; // increment the parity bit counter
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}
|
||||
rcv_parity = rcv_parity & 1; // mask off all bits except the lsb
|
||||
if (rcv_parity == 0) { // check for bad (even) parity
|
||||
trackpoint_error = HIGH; //bad parity so set the error flag
|
||||
}
|
||||
delayMicroseconds(1); // delay to let the clock settle out
|
||||
while (digitalRead(TP_CLK) == LOW) { // loop until the clock goes high
|
||||
if (watchdog >= timeout) { //check for infinite loop
|
||||
trackpoint_error = HIGH; // set error flag
|
||||
break; // break out of infinite loop
|
||||
}
|
||||
}
|
||||
// stop bit
|
||||
delayMicroseconds(1); // delay to let the clock settle out
|
||||
while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low
|
||||
if (watchdog >= timeout) { //check for infinite loop
|
||||
trackpoint_error = HIGH; // set error flag
|
||||
break; // break out of infinite loop
|
||||
}
|
||||
}
|
||||
if (digitalRead(TP_DATA) == LOW) { // check if stop bit is bad (low)
|
||||
trackpoint_error = HIGH; //bad stop bit so set the error flag
|
||||
}
|
||||
delayMicroseconds(1); // delay to let the clock settle out
|
||||
while (digitalRead(TP_CLK) == LOW) { // loop until the clock goes high
|
||||
if (watchdog >= timeout) { //check for infinite loop
|
||||
trackpoint_error = HIGH; // set error flag
|
||||
break; // break out of infinite loop
|
||||
}
|
||||
}
|
||||
// Inhibit the bus so the tp only talks when we're listening
|
||||
go_0(TP_CLK);
|
||||
return rcv_data; // pass the received data back
|
||||
}
|
||||
//
|
||||
void trackpoint_init()
|
||||
{
|
||||
trackpoint_error = LOW; // start with no error
|
||||
go_z(TP_CLK); // float the clock and data to trackpoint
|
||||
go_z(TP_DATA);
|
||||
// Trackpoint Reset signal is active high. Start it off low to let power stabilize
|
||||
go_0(TP_RESET); // drive low
|
||||
delay(1000); // wait 1 second
|
||||
go_1(TP_RESET); // drive High to activate Reset signal to trackpoint
|
||||
delay(1000); // wait 1 second to give it a good long reset
|
||||
go_0(TP_RESET); // drive Reset back to the inactive (low) state
|
||||
delay(1000); // wait 1 second before proceeding so trackpoint is ready
|
||||
// Sending reset command to trackpoint
|
||||
tp_write(0xff);
|
||||
if (tp_read() != 0xfa) { // verify correct ack byte
|
||||
trackpoint_error = HIGH;
|
||||
}
|
||||
delayMicroseconds(100); // give the tp time to run its self diagnostic
|
||||
// verify proper response from tp
|
||||
if (tp_read() != 0xaa) { // verify basic assurance test passed
|
||||
trackpoint_error = HIGH;
|
||||
}
|
||||
if (tp_read() != 0x00) { // verify correct device id
|
||||
trackpoint_error = HIGH;
|
||||
}
|
||||
// Sending remote mode code so the trackpoint will send data only when polled
|
||||
tp_write(0xf0); // remote mode
|
||||
if (tp_read() != 0xfa) { // verify correct ack byte
|
||||
trackpoint_error = HIGH;
|
||||
}
|
||||
if (trackpoint_error == HIGH) { // check for any errors from tp
|
||||
delayMicroseconds(300); // wait before trying to initialize tp one last time
|
||||
tp_write(0xff); // send tp reset code
|
||||
tp_read(); // read but don't look at response from tp
|
||||
// Read ack byte
|
||||
tp_read(); // read but don't look at response from tp
|
||||
tp_read(); // read but don't look at response from tp
|
||||
// Sending remote mode code so the trackpoint will send data only when polled
|
||||
tp_write(0xf0); // remote mode
|
||||
tp_read(); // read but don't look at response from tp
|
||||
delayMicroseconds(100);
|
||||
}
|
||||
}
|
||||
//
|
||||
// *****************Functions for Keyboard*****************************
|
||||
// Function to load the key name into the first available slot
|
||||
void load_slot(int key) {
|
||||
if (!slot1) {
|
||||
slot1 = key;
|
||||
}
|
||||
else if (!slot2) {
|
||||
slot2 = key;
|
||||
}
|
||||
else if (!slot3) {
|
||||
slot3 = key;
|
||||
}
|
||||
else if (!slot4) {
|
||||
slot4 = key;
|
||||
}
|
||||
else if (!slot5) {
|
||||
slot5 = key;
|
||||
}
|
||||
else if (!slot6) {
|
||||
slot6 = key;
|
||||
}
|
||||
if (!slot1 || !slot2 || !slot3 || !slot4 || !slot5 || !slot6) {
|
||||
slots_full = LOW; // slots are not full
|
||||
}
|
||||
else {
|
||||
slots_full = HIGH; // slots are full
|
||||
}
|
||||
}
|
||||
//
|
||||
// Function to clear the slot that contains the key name
|
||||
void clear_slot(int key) {
|
||||
if (slot1 == key) {
|
||||
slot1 = 0;
|
||||
}
|
||||
else if (slot2 == key) {
|
||||
slot2 = 0;
|
||||
}
|
||||
else if (slot3 == key) {
|
||||
slot3 = 0;
|
||||
}
|
||||
else if (slot4 == key) {
|
||||
slot4 = 0;
|
||||
}
|
||||
else if (slot5 == key) {
|
||||
slot5 = 0;
|
||||
}
|
||||
else if (slot6 == key) {
|
||||
slot6 = 0;
|
||||
}
|
||||
if (!slot1 || !slot2 || !slot3 || !slot4 || !slot5 || !slot6) {
|
||||
slots_full = LOW; // slots are not full
|
||||
}
|
||||
else {
|
||||
slots_full = HIGH; // slots are full
|
||||
}
|
||||
}
|
||||
//
|
||||
// Function to load the modifier key name into the appropriate mod variable
|
||||
void load_mod(int m_key) {
|
||||
if (m_key == MODIFIERKEY_LEFT_SHIFT) {
|
||||
mod_shift_l = m_key;
|
||||
}
|
||||
else if (m_key == MODIFIERKEY_RIGHT_SHIFT) {
|
||||
mod_shift_r = m_key;
|
||||
}
|
||||
else if (m_key == MODIFIERKEY_LEFT_CTRL) {
|
||||
mod_ctrl_l = m_key;
|
||||
}
|
||||
else if (m_key == MODIFIERKEY_RIGHT_CTRL) {
|
||||
mod_ctrl_r = m_key;
|
||||
}
|
||||
else if (m_key == MODIFIERKEY_LEFT_ALT) {
|
||||
mod_alt_l = m_key;
|
||||
}
|
||||
else if (m_key == MODIFIERKEY_RIGHT_ALT) {
|
||||
mod_alt_r = m_key;
|
||||
}
|
||||
else if (m_key == MODIFIERKEY_GUI) {
|
||||
mod_gui = m_key;
|
||||
}
|
||||
}
|
||||
//
|
||||
// Function to load 0 into the appropriate mod variable
|
||||
void clear_mod(int m_key) {
|
||||
if (m_key == MODIFIERKEY_LEFT_SHIFT) {
|
||||
mod_shift_l = 0;
|
||||
}
|
||||
else if (m_key == MODIFIERKEY_RIGHT_SHIFT) {
|
||||
mod_shift_r = 0;
|
||||
}
|
||||
else if (m_key == MODIFIERKEY_LEFT_CTRL) {
|
||||
mod_ctrl_l = 0;
|
||||
}
|
||||
else if (m_key == MODIFIERKEY_RIGHT_CTRL) {
|
||||
mod_ctrl_r = 0;
|
||||
}
|
||||
else if (m_key == MODIFIERKEY_LEFT_ALT) {
|
||||
mod_alt_l = 0;
|
||||
}
|
||||
else if (m_key == MODIFIERKEY_RIGHT_ALT) {
|
||||
mod_alt_r = 0;
|
||||
}
|
||||
else if (m_key == MODIFIERKEY_GUI) {
|
||||
mod_gui = 0;
|
||||
}
|
||||
}
|
||||
//
|
||||
// Function to send the modifier keys over usb
|
||||
void send_mod() {
|
||||
Keyboard.set_modifier(mod_shift_l | mod_shift_r | mod_ctrl_l | mod_ctrl_r | mod_alt_l | mod_alt_r | mod_gui);
|
||||
Keyboard.send_now();
|
||||
}
|
||||
//
|
||||
// Function to send the normal keys in the 6 slots over usb
|
||||
void send_normals() {
|
||||
Keyboard.set_key1(slot1);
|
||||
Keyboard.set_key2(slot2);
|
||||
Keyboard.set_key3(slot3);
|
||||
Keyboard.set_key4(slot4);
|
||||
Keyboard.set_key5(slot5);
|
||||
Keyboard.set_key6(slot6);
|
||||
Keyboard.send_now();
|
||||
}
|
||||
//
|
||||
//************************************Setup*******************************************
|
||||
void setup() {
|
||||
// ************trackpoint setup
|
||||
trackpoint_init(); // reset trackpoint, then set it's resolution and put it in remote mode
|
||||
if (trackpoint_error) {
|
||||
trackpoint_init(); // try one more time to initialize the trackpoint
|
||||
}
|
||||
// ************keyboard setup
|
||||
for (int a = 0; a < cols_max; a++) { // loop thru all column pins
|
||||
go_pu(Col_IO[a]); // set each column pin as an input with a pullup
|
||||
}
|
||||
//
|
||||
for (int b = 0; b < rows_max; b++) { // loop thru all row pins
|
||||
go_z(Row_IO[b]); // set each row pin as a floating output
|
||||
}
|
||||
//
|
||||
go_0(HOTKEY_RTN); // Always drive the Hotkey return side low
|
||||
go_pu(HOTKEY); // Pull up the Hotkey plus side for reading
|
||||
//
|
||||
pinMode(BLINK_LED, OUTPUT); // I/O 13 drives the LED on the Teensy
|
||||
pinMode(SYNC, OUTPUT); // I/O 27 drives a scope for frequency measurement
|
||||
|
||||
}
|
||||
//
|
||||
// *******declare and initialize trackpoint variables
|
||||
char mstat; // trackpoint status reg = Y overflow, X overflow, Y sign bit, X sign bit, Always 1, Middle Btn, Right Btn, Left Btn
|
||||
char mx; // trackpoint x movement = 8 data bits. The sign bit is in the status register to
|
||||
// make a 9 bit 2's complement value. Left to right on the trackpoint gives a positive value.
|
||||
char my; // trackpoint y movement also 8 bits plus sign. trackpoint movement away from the user gives a positive value.
|
||||
boolean over_flow; // set if x or y movement values are bad due to overflow
|
||||
boolean left_button = 0; // on/off variable for left button = bit 0 of mstat
|
||||
boolean right_button = 0; // on/off variable for right button = bit 1 of mstat
|
||||
boolean middle_button = 0; // on/off variable for middle button = bit 2 of mstat
|
||||
boolean old_left_button = 0; // on/off variable for left button status the previous polling cycle
|
||||
boolean old_right_button = 0; // on/off variable for right button status the previous polling cycle
|
||||
boolean old_middle_button = 0; // on/off variable for middle button status the previous polling cycle
|
||||
boolean button_change = 0; // Active high, shows when any trackpoint button has changed since last polling cycle
|
||||
// **********declare and initialize keyboard variables
|
||||
boolean Fn_pressed = HIGH; // Initialize Fn key to HIGH = "not pressed"
|
||||
extern volatile uint8_t keyboard_leds; // 8 bits sent from Host to Teensy that give keyboard LED status.
|
||||
char blink_count = 0; // Blink loop counter
|
||||
boolean blinky = LOW; // Blink LED state
|
||||
boolean sync_sig = LOW; // sync pulse to measure scan frequency
|
||||
//
|
||||
//*********************************Main Loop*******************************************
|
||||
//
|
||||
void loop() {
|
||||
// *************Keyboard Main**************
|
||||
// Read the Fn key (aka Hotkey) which is not part of the key matrix
|
||||
if (!digitalRead(HOTKEY)) {
|
||||
Fn_pressed = LOW; // Fn key is pressed (active low)
|
||||
}
|
||||
else {
|
||||
Fn_pressed = HIGH; // Fn key is not pressed
|
||||
}
|
||||
//
|
||||
// Scan keyboard matrix with an outer loop that drives each row low and an inner loop that reads every column (with pull ups).
|
||||
// The routine looks at each key's present state (by reading the column input pin) and also the previous state from the last scan
|
||||
// that was 30msec ago. The status of a key that was just pressed or just released is sent over USB and the state is saved in the old_key matrix.
|
||||
// The keyboard keys will read as logic low if they are pressed (negative logic).
|
||||
// The old_key matrix also uses negative logic (low=pressed).
|
||||
//
|
||||
for (int x = 0; x < rows_max; x++) { // loop thru the rows
|
||||
go_0(Row_IO[x]); // Activate Row (send it low)
|
||||
delayMicroseconds(10); // give the row time to go low and settle out
|
||||
for (int y = 0; y < cols_max; y++) { // loop thru the columns
|
||||
// **********Modifier keys
|
||||
if (modifier[x][y] != 0) { // check if modifier key exists at this location in the array (a non-zero value)
|
||||
if (!digitalRead(Col_IO[y]) && (old_key[x][y])) { // Read column to see if key is low (pressed) and was previously not pressed
|
||||
load_mod(modifier[x][y]); // function reads which modifier key is pressed and loads it into the appropriate mod_... variable
|
||||
send_mod(); // function sends the state of all modifier keys over usb including the one that just got pressed
|
||||
old_key[x][y] = LOW; // Save state of key as "pressed"
|
||||
}
|
||||
else if (digitalRead(Col_IO[y]) && (!old_key[x][y])) { //check if key is not pressed and was previously pressed
|
||||
clear_mod(modifier[x][y]); // function reads which modifier key was released and loads 0 into the appropriate mod_... variable
|
||||
send_mod(); // function sends all mod's over usb including the one that just released
|
||||
old_key[x][y] = HIGH; // Save state of key as "not pressed"
|
||||
}
|
||||
}
|
||||
// ***********end of modifier section
|
||||
//
|
||||
// ***********Normal keys section
|
||||
else if (normal[x][y] != 0) { // check if normal key exists at this location in the array (a non-zero value)
|
||||
if (!digitalRead(Col_IO[y]) && (old_key[x][y]) && (!slots_full)) { // check if key pressed and not previously pressed and slots not full
|
||||
old_key[x][y] = LOW; // Save state of key as "pressed"
|
||||
if ((normal[x][y] == KEY_SCROLL_LOCK) && (!Fn_pressed)) { // check for special case of Num Lock Key
|
||||
load_slot(KEY_NUM_LOCK); // update first available slot with Num Lock instead of Scroll Lock
|
||||
send_normals(); // send all slots over USB including the Num Lock Key that just got pressed
|
||||
}
|
||||
else if (keyboard_leds & 1) { // test if Num Lock is turned on
|
||||
load_slot(numlock[x][y]); //update first available slot with key name from numlock matrix
|
||||
send_normals(); // send all slots over USB including the key that just got pressed
|
||||
}
|
||||
else {
|
||||
load_slot(normal[x][y]); //update first available slot with normal key name
|
||||
send_normals(); // send all slots over USB including the key that just got pressed
|
||||
}
|
||||
}
|
||||
else if (digitalRead(Col_IO[y]) && (!old_key[x][y])) { //check if key is not pressed, but was previously pressed
|
||||
old_key[x][y] = HIGH; // Save state of key as "not pressed"
|
||||
if ((normal[x][y] == KEY_SCROLL_LOCK) && (!Fn_pressed)) { // check for special case of Num Lock Key
|
||||
clear_slot(KEY_NUM_LOCK); // clear the slot that contains Num Lock
|
||||
send_normals(); // send all slots over USB including the Num Lock key
|
||||
}
|
||||
else if (keyboard_leds & 1) { // test if Num Lock is turned on
|
||||
clear_slot(numlock[x][y]); //clear slot with key name from numlock matrix
|
||||
send_normals(); // send all slots over USB including the key that just got released
|
||||
}
|
||||
else {
|
||||
clear_slot(normal[x][y]); //clear the slot that contains the normal key name
|
||||
send_normals(); // send all slots over USB including the key that was just released
|
||||
}
|
||||
}
|
||||
}
|
||||
// **************end of normal section
|
||||
//
|
||||
// *************Volume key section. Note PJRC states that volume up, down, & mute should be sent with Keyboard.press function.
|
||||
else if (media[x][y] != 0) { // check if any volume control key exists at this location in the array (a non-zero value)
|
||||
if (!digitalRead(Col_IO[y]) && (old_key[x][y])) { // check if key is pressed and was not previously pressed
|
||||
old_key[x][y] = LOW; // Save state of key as "pressed"
|
||||
Keyboard.press(media[x][y]); // send volume key press
|
||||
}
|
||||
else if (digitalRead(Col_IO[y]) && (!old_key[x][y])) { //check if key is not pressed, but was previously pressed
|
||||
old_key[x][y] = HIGH; // Save state of key as "not pressed"
|
||||
Keyboard.release(media[x][y]); // send volume key release
|
||||
}
|
||||
}
|
||||
// ***************end of volume section
|
||||
}
|
||||
go_z(Row_IO[x]); // De-activate Row (send it to hi-z)
|
||||
}
|
||||
//
|
||||
// **********keyboard scan complete
|
||||
//
|
||||
// ****************************Trackpoint Routine*********************************
|
||||
//
|
||||
// poll the trackpoint for new movement data
|
||||
over_flow = 0; // assume no overflow until status is received
|
||||
trackpoint_error = LOW; // start with no error
|
||||
tp_write(0xeb); // request data
|
||||
if (tp_read() != 0xfa) { // verify correct ack byte
|
||||
trackpoint_error = HIGH;
|
||||
}
|
||||
mstat = tp_read(); // save into status variable
|
||||
mx = tp_read(); // save into x variable
|
||||
my = tp_read(); // save into y variable
|
||||
if (((0x80 & mstat) == 0x80) || ((0x40 & mstat) == 0x40)) { // x or y overflow bits set?
|
||||
over_flow = 1; // set the overflow flag
|
||||
}
|
||||
// change the x data from 9 bit to 8 bit 2's complement
|
||||
mx = mx >> 1; // convert to 7 bits of data by dividing by 2
|
||||
mx = mx & 0x7f; // don't allow sign extension
|
||||
if ((0x10 & mstat) == 0x10) { // move the sign into
|
||||
mx = 0x80 | mx; // the 8th bit position
|
||||
}
|
||||
// change the y data from 9 bit to 8 bit 2's complement and then take the 2's complement
|
||||
// because y movement on ps/2 format is opposite of touchpad.move function
|
||||
my = my >> 1; // convert to 7 bits of data by dividing by 2
|
||||
my = my & 0x7f; // don't allow sign extension
|
||||
if ((0x20 & mstat) == 0x20) { // move the sign into
|
||||
my = 0x80 | my; // the 8th bit position
|
||||
}
|
||||
my = (~my + 0x01); // change the sign of y data by taking the 2's complement (invert and add 1)
|
||||
// zero out mx and my if over_flow or trackpoint_error is set
|
||||
if ((over_flow) || (trackpoint_error)) {
|
||||
mx = 0x00; // data is garbage so zero it out
|
||||
my = 0x00;
|
||||
}
|
||||
// send the x and y data back via usb if either one is non-zero
|
||||
if ((mx != 0x00) || (my != 0x00)) {
|
||||
Mouse.move(mx,my);
|
||||
}
|
||||
//
|
||||
// send the trackpoint left and right button status over usb if no error
|
||||
if (!trackpoint_error) {
|
||||
if ((0x01 & mstat) == 0x01) { // if left button set
|
||||
left_button = 1;
|
||||
}
|
||||
else { // clear left button
|
||||
left_button = 0;
|
||||
}
|
||||
if ((0x02 & mstat) == 0x02) { // if right button set
|
||||
right_button = 1;
|
||||
}
|
||||
else { // clear right button
|
||||
right_button = 0;
|
||||
}
|
||||
if ((0x04 & mstat) == 0x04) { // if middle button set
|
||||
middle_button = 1;
|
||||
}
|
||||
else { // clear middle button
|
||||
middle_button = 0;
|
||||
}
|
||||
// Determine if any buttons have changed since last polling cycle
|
||||
button_change = ((left_button ^ old_left_button) | (right_button ^ old_right_button) | (middle_button ^ old_middle_button));
|
||||
// Don't send button status if there's no change since last time.
|
||||
if (button_change) {
|
||||
Mouse.set_buttons(left_button, middle_button, right_button); // send button status
|
||||
}
|
||||
old_left_button = left_button; // remember new button status for next polling cycle
|
||||
old_right_button = right_button;
|
||||
old_middle_button = middle_button;
|
||||
}
|
||||
// **************************************End of trackpoint routine***********************************
|
||||
//
|
||||
// *******keyboard LEDs
|
||||
// Turn on or off the LEDs for Num Lock, Caps Lock, and Scroll Lock based on bit 0, 1, and 2 from the keyboard_leds
|
||||
// variable controlled by the USB host computer
|
||||
//
|
||||
if (keyboard_leds & 1) { // mask off all bits but D0 and test if set
|
||||
go_1(NUM_LED); // turn on the Num Lock LED
|
||||
}
|
||||
else {
|
||||
go_0(NUM_LED); // turn off the Num Lock LED
|
||||
}
|
||||
//
|
||||
//
|
||||
if (keyboard_leds & 1<<1) { // mask off all bits but D1 and test if set
|
||||
go_1(CAPS_LED); // turn on the Caps Lock LED
|
||||
}
|
||||
else {
|
||||
go_0(CAPS_LED); // turn off the Caps Lock LED
|
||||
}
|
||||
//
|
||||
//
|
||||
if (keyboard_leds & 1<<2) { // mask off all bits but D2 and test if set
|
||||
go_1(SCRL_LED); // turn on the Scroll Lock LED
|
||||
}
|
||||
else {
|
||||
go_0(SCRL_LED); // turn off the Scroll Lock LED
|
||||
}
|
||||
//
|
||||
// Blink LED on Teensy to show a heart beat
|
||||
//
|
||||
if (blink_count == 0x17) {
|
||||
digitalWrite(BLINK_LED, blinky);
|
||||
blinky = !blinky;
|
||||
blink_count = 0;
|
||||
}
|
||||
else {
|
||||
blink_count = blink_count + 1;
|
||||
}
|
||||
//
|
||||
// Provide a sync pulse to measure the scan frequency
|
||||
//
|
||||
sync_sig = !sync_sig; // toggle the sync signal
|
||||
digitalWrite(SYNC, sync_sig);
|
||||
//
|
||||
// ****************End of main loop
|
||||
//
|
||||
delay(24); // The overall keyboard/trackpoint scanning rate was measured at 30ms
|
||||
}
|
2846
IBM T43 Files/T43.kicad_pcb
Normal file
2846
IBM T43 Files/T43.kicad_pcb
Normal file
File diff suppressed because it is too large
Load diff
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Reference in a new issue