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Example_Keyboards/IBM Thinkpad 380ED/IBM_380_revC.ino
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Example_Keyboards/IBM Thinkpad 380ED/IBM_380_revC.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 implements an IBM Thinkpad 380ED Laptop USB Keyboard/Trackpoint Controller.
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// It uses a Teensy 3.2 on a custom FPC connector board that also has the amplifiers for the
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// trackpoint that are fed into the Teensy ADC.
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//
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// Revision History
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// Initial Release May 16, 2020
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// Rev A May 17, 2020 - Added Fn-F9,F10,F11,F12 adjustments for trackpoint
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// Rev B May 27, 2020 - Changed Dead Zone methodology
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// Rev C May 27, 2020 - Reduced noise_zone from 50 to 10; Reduced delay from 25ms to 8ms
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//
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#define MODIFIERKEY_FN 0x8f // give Fn key a fake HID code
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#define CAPS_LED 14 // Teensy I/O's connected to thru hole pads with resistors for LEDs
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#define NUM_LED 15
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#define SCRL_LED 16
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#define HEARTBEAT_LED 13 // onboard LED set to blink
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#define TP_LEFT 20 // Trackpoint mouse buttons connected to Teensy I/O's with pullups
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#define TP_RIGHT 5
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#define TP_RETURN 30 // will be driven low
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//
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const byte rows_max = 17; // sets the number of rows in the keyboard matrix
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const byte cols_max = 9; // sets the number of columns in the keyboard matrix
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//
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// Load the normal key matrix with the Teensyduino key names
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// 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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{KEY_ESC,KEY_TAB,KEY_TILDE,KEY_1,0,0,KEY_Z,KEY_A,KEY_Q},
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{0,KEY_CAPS_LOCK,KEY_F1,KEY_2,0,0,KEY_X,KEY_S,KEY_W},
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{0,0,0,0,0,0,0,0,0},
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{KEY_G,KEY_T,KEY_5,KEY_4,KEY_B,0,KEY_V,KEY_F,KEY_R},
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{KEY_H,KEY_Y,KEY_6,KEY_7,KEY_N,0,KEY_M,KEY_J,KEY_U},
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{KEY_F6,KEY_LEFT_BRACE,KEY_EQUAL,KEY_8,0,0,KEY_COMMA,KEY_K,KEY_I},
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{KEY_UP,0,KEY_HOME,KEY_END,KEY_LEFT,0,KEY_PAUSE,0,0},
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{0,0,KEY_PAGE_UP,KEY_PAGE_DOWN,0,0,0,0,0},
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{KEY_F4,KEY_F3,KEY_F2,KEY_3,0,0,KEY_C,KEY_D,KEY_E},
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{KEY_QUOTE,KEY_LEFT_BRACE,KEY_MINUS,KEY_0,KEY_SLASH,0,0,KEY_SEMICOLON,KEY_P},
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{KEY_F5,KEY_BACKSPACE,KEY_F9,KEY_F10,KEY_SPACE,0,KEY_ENTER,KEY_BACKSLASH,0},
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{0,0,KEY_DELETE,KEY_F11,KEY_DOWN,0,0,0,0},
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{0,0,0,KEY_PRINTSCREEN,0,0,0,0,KEY_NUM_LOCK},
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{0,0,KEY_INSERT,KEY_F12,KEY_RIGHT,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,KEY_F7,KEY_F8,KEY_9,0,0,KEY_PERIOD,KEY_L,KEY_O}
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};
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// Load the numlock key matrix with key names at the correct row-column location.
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// This matrix is the same as the normal matrix except for the number pad keys
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// A zero indicates no numlock key at that location.
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int numlock[rows_max][cols_max] = {
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{KEY_ESC,KEY_TAB,KEY_TILDE,KEY_1,0,0,KEY_Z,KEY_A,KEY_Q},
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{0,KEY_CAPS_LOCK,KEY_F1,KEY_2,0,0,KEY_X,KEY_S,KEY_W},
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{0,0,0,0,0,0,0,0,0},
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{KEY_G,KEY_T,KEY_5,KEY_4,KEY_B,0,KEY_V,KEY_F,KEY_R},
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{KEY_H,KEY_Y,KEY_6,KEYPAD_7,KEY_N,0,KEYPAD_0,KEYPAD_1,KEYPAD_4},
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{KEY_F6,KEY_LEFT_BRACE,KEY_EQUAL,KEYPAD_8,0,0,KEY_COMMA,KEYPAD_2,KEYPAD_5},
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{KEY_UP,0,KEY_HOME,KEY_END,KEY_LEFT,0,KEY_PAUSE,0,0},
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{0,0,KEY_UP,KEY_DOWN,0,0,0,0,0},
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{KEY_F4,KEY_F3,KEY_F2,KEY_3,0,0,KEY_C,KEY_D,KEY_E},
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{KEY_QUOTE,KEY_LEFT_BRACE,KEY_MINUS,KEYPAD_SLASH,KEYPAD_PLUS,0,0,KEYPAD_MINUS,KEYPAD_ASTERIX},
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{KEY_F5,KEY_BACKSPACE,KEY_F9,KEY_F10,KEY_SPACE,0,KEY_ENTER,KEY_BACKSLASH,0},
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{0,0,KEY_DELETE,KEY_F11,KEY_DOWN,0,0,0,0},
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{0,0,0,KEY_PRINTSCREEN,0,0,0,0,KEY_NUM_LOCK},
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{0,0,KEY_INSERT,KEY_F12,KEY_RIGHT,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,KEY_F7,KEY_F8,KEYPAD_9,0,0,KEYPAD_PERIOD,KEYPAD_3,KEYPAD_6}
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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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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,MODIFIERKEY_LEFT_CTRL,0,0,0,MODIFIERKEY_RIGHT_CTRL,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{MODIFIERKEY_LEFT_ALT,0,0,0,MODIFIERKEY_RIGHT_ALT,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,MODIFIERKEY_FN,0,0,0},
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{0,MODIFIERKEY_LEFT_SHIFT,0,0,0,0,MODIFIERKEY_RIGHT_SHIFT,0,0},
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{0,0,0,0,0,0,0,0,0}
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};
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// Load the media key matrix with Fn 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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{0,0,0,0,0,0,0,0,0},
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{0,0,KEY_MEDIA_MUTE,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,KEY_MEDIA_VOLUME_INC,KEY_MEDIA_VOLUME_DEC,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,KEY_SYSTEM_WAKE_UP,0,0,0,0,KEY_SCROLL_LOCK},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0}
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};
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// Initialize the old_key matrix with one's (nothing pressed).
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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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{1,1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1,1,1}
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};
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//
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// Assign the Teensy I/O row numbers
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int Row_IO[rows_max] = {7,8,9,10,11,12,18,19,24,25,26,27,28,29,31,32,33};
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//
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// Assign the column I/O numbers
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int Col_IO[cols_max] = {0,1,2,3,4,6,21,22,23};
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// declare and initialize trackpoint variables
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int x_read; // stores the reading from the X ADC
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int y_read; // same for the Y ADC
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char mx; // signed byte used by the Mouse.move function for x value. Positive value moves to the right
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char my; // positive y value moves down
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int x_delta; // signed 16 bit value gives x movement amount
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int y_delta; // y version.
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int x_center; //resting position of x sensor
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int y_center; //resting position of y sensor
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int noise_zone = 15; // dead zone around the center. Can be as low as 3 but cursor may start to drift so add some safety margin.
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// Increase this number if the cursor moves without touching the TP. Decrease if too much force is needed.
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boolean left_button = 0; // on/off variable for left button, 1 = pushed
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boolean right_button = 0; // on/off variable for right button, 1 = pushed
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boolean old_left_button = 0; // on/off variable for left button from the previous cycle
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boolean old_right_button = 0; // on/off variable for right button from the previous cycle
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boolean button_change = 0; // Shows when the left or right buttons have changed, 1 = change
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// declare keyboard variables
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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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// Function to load the key name into the first available slot
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void load_slot(int key) {
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if (!slot1) {
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slot1 = key;
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}
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else if (!slot2) {
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slot2 = key;
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}
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else if (!slot3) {
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slot3 = key;
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}
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else if (!slot4) {
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slot4 = key;
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}
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else if (!slot5) {
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slot5 = key;
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}
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else if (!slot6) {
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slot6 = key;
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}
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if (!slot1 || !slot2 || !slot3 || !slot4 || !slot5 || !slot6) {
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slots_full = LOW; // slots are not full
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}
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else {
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slots_full = HIGH; // slots are full
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}
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}
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//
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// Function to clear the slot that contains the key name
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void clear_slot(int key) {
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if (slot1 == key) {
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slot1 = 0;
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}
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else if (slot2 == key) {
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slot2 = 0;
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}
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else if (slot3 == key) {
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slot3 = 0;
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}
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else if (slot4 == key) {
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slot4 = 0;
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}
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else if (slot5 == key) {
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slot5 = 0;
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}
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else if (slot6 == key) {
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slot6 = 0;
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}
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if (!slot1 || !slot2 || !slot3 || !slot4 || !slot5 || !slot6) {
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slots_full = LOW; // slots are not full
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}
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else {
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slots_full = HIGH; // slots are full
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}
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}
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//
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// Function to load the modifier key name into the appropriate mod variable
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void load_mod(int m_key) {
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if (m_key == MODIFIERKEY_LEFT_SHIFT) {
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mod_shift_l = m_key;
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}
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else if (m_key == MODIFIERKEY_RIGHT_SHIFT) {
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mod_shift_r = m_key;
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}
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else if (m_key == MODIFIERKEY_LEFT_CTRL) {
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mod_ctrl_l = m_key;
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}
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else if (m_key == MODIFIERKEY_RIGHT_CTRL) {
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mod_ctrl_r = m_key;
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}
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else if (m_key == MODIFIERKEY_LEFT_ALT) {
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mod_alt_l = m_key;
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}
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else if (m_key == MODIFIERKEY_RIGHT_ALT) {
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mod_alt_r = m_key;
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}
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else if (m_key == MODIFIERKEY_GUI) {
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mod_gui = m_key;
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}
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}
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//
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// Function to load 0 into the appropriate mod variable
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void clear_mod(int m_key) {
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if (m_key == MODIFIERKEY_LEFT_SHIFT) {
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mod_shift_l = 0;
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}
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else if (m_key == MODIFIERKEY_RIGHT_SHIFT) {
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mod_shift_r = 0;
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}
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else if (m_key == MODIFIERKEY_LEFT_CTRL) {
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mod_ctrl_l = 0;
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}
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else if (m_key == MODIFIERKEY_RIGHT_CTRL) {
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mod_ctrl_r = 0;
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}
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else if (m_key == MODIFIERKEY_LEFT_ALT) {
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mod_alt_l = 0;
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}
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else if (m_key == MODIFIERKEY_RIGHT_ALT) {
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mod_alt_r = 0;
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}
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else if (m_key == MODIFIERKEY_GUI) {
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mod_gui = 0;
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}
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}
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//
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// Function to send the modifier keys over usb
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void send_mod() {
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Keyboard.set_modifier(mod_shift_l | mod_shift_r | mod_ctrl_l | mod_ctrl_r | mod_alt_l | mod_alt_r | mod_gui);
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Keyboard.send_now();
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}
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//
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// Function to send the normal keys in the 6 slots over usb
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void send_normals() {
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Keyboard.set_key1(slot1);
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Keyboard.set_key2(slot2);
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Keyboard.set_key3(slot3);
|
||||||
|
Keyboard.set_key4(slot4);
|
||||||
|
Keyboard.set_key5(slot5);
|
||||||
|
Keyboard.set_key6(slot6);
|
||||||
|
Keyboard.send_now();
|
||||||
|
}
|
||||||
|
//
|
||||||
|
// Function to set a pin to high impedance (acts like open drain output)
|
||||||
|
void go_z(int pin)
|
||||||
|
{
|
||||||
|
pinMode(pin, INPUT);
|
||||||
|
digitalWrite(pin, HIGH);
|
||||||
|
}
|
||||||
|
//
|
||||||
|
// Function to set a pin as an input with a pullup
|
||||||
|
void go_pu(int pin)
|
||||||
|
{
|
||||||
|
pinMode(pin, INPUT_PULLUP);
|
||||||
|
digitalWrite(pin, HIGH);
|
||||||
|
}
|
||||||
|
//
|
||||||
|
// Function to send a pin to a logic low
|
||||||
|
void go_0(int pin)
|
||||||
|
{
|
||||||
|
pinMode(pin, OUTPUT);
|
||||||
|
digitalWrite(pin, LOW);
|
||||||
|
}
|
||||||
|
//
|
||||||
|
// Function to send a pin to a logic high
|
||||||
|
void go_1(int pin)
|
||||||
|
{
|
||||||
|
pinMode(pin, OUTPUT);
|
||||||
|
digitalWrite(pin, HIGH);
|
||||||
|
}
|
||||||
|
//
|
||||||
|
//----------------------------------Setup-------------------------------------------
|
||||||
|
void setup() {
|
||||||
|
// Trackpoint setup
|
||||||
|
delay(1000); // delay a second to let things settle out
|
||||||
|
analogReadRes(13); // set ADC resolution to 13 bits (16 bit ADC but low 3 bits are random noise)
|
||||||
|
analogReadAveraging(8); // ADC will take the average of 8 reads to filter noise.
|
||||||
|
x_center = analogRead(A11); // store the center (no movement) position for x
|
||||||
|
y_center = analogRead(A10); // same for y
|
||||||
|
//
|
||||||
|
go_0(TP_RETURN); // set the return pin for the trackpoint left/right buttons to always low
|
||||||
|
go_pu(TP_RIGHT); // set right trackpoint button as input with a pullup
|
||||||
|
go_pu(TP_LEFT); // set left trackpoint button as input with a pullup
|
||||||
|
// keyboard I/O 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
|
||||||
|
}
|
||||||
|
//
|
||||||
|
pinMode(HEARTBEAT_LED, OUTPUT); // drive the LED on the Teensy
|
||||||
|
}
|
||||||
|
//
|
||||||
|
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; // heartbeat loop counter
|
||||||
|
boolean blinky = LOW; // heartbeat LED state
|
||||||
|
//
|
||||||
|
//---------------------------------Main Loop---------------------------------------------
|
||||||
|
//
|
||||||
|
void loop() {
|
||||||
|
// 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 including the Fn special case
|
||||||
|
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
|
||||||
|
if (modifier[x][y] != MODIFIERKEY_FN) { // Exclude Fn modifier key
|
||||||
|
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 {
|
||||||
|
Fn_pressed = LOW; // Fn status variable is active low
|
||||||
|
old_key[x][y] = LOW; // old_key state is "pressed" (active low)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
else if (digitalRead(Col_IO[y]) && (!old_key[x][y])) { //check if key is not pressed and was previously pressed
|
||||||
|
if (modifier[x][y] != MODIFIERKEY_FN) { // Exclude Fn modifier key
|
||||||
|
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"
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
Fn_pressed = HIGH; // Fn is no longer active
|
||||||
|
old_key[x][y] = HIGH; // old_key state is "not pressed"
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
// ***********end of modifier section
|
||||||
|
//
|
||||||
|
// ***********Normal keys, num lock keys and media keys in this section
|
||||||
|
else if ((normal[x][y] != 0) || (media[x][y] != 0)) { // check if normal or media key exists at this location in the array
|
||||||
|
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 (Fn_pressed) { // Fn_pressed is active low so it is not pressed and normal key needs to be sent
|
||||||
|
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 { // Num Lock is not turned on
|
||||||
|
load_slot(normal[x][y]); //update first available slot with key name from normal matrix
|
||||||
|
send_normals(); // send all slots over USB including the key that just got pressed
|
||||||
|
}
|
||||||
|
}
|
||||||
|
else if (media[x][y] != 0) { // Fn is pressed so send media if a key exists in the matrix
|
||||||
|
Keyboard.press(media[x][y]); // media key is sent using keyboard press function per PJRC
|
||||||
|
delay(5); // delay 5 milliseconds before releasing to make sure it gets sent over USB
|
||||||
|
Keyboard.release(media[x][y]); // send media key release
|
||||||
|
}
|
||||||
|
else if (normal[x][y] == KEY_F12) { // Fn is active and F12 is pressed - recapture TP center
|
||||||
|
x_center = analogRead(A11); // store the center (no movement) position for x
|
||||||
|
y_center = analogRead(A10); // same for y
|
||||||
|
}
|
||||||
|
else if (normal[x][y] == KEY_F10) { // Fn is active and F10 is pressed - increase noise zone value by 5
|
||||||
|
noise_zone = noise_zone + 5;
|
||||||
|
}
|
||||||
|
else if (normal[x][y] == KEY_F9) { // Fn is active and F9 is pressed - decrease noise zone value by 5
|
||||||
|
if (noise_zone >= 5) { // don't allow noise zone to be reduced below zero because it will cause cursor drift
|
||||||
|
noise_zone = noise_zone - 5;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
else if (normal[x][y] == KEY_F11) { // Fn is active and F11 is pressed - Set noise zone to default value of 50
|
||||||
|
noise_zone = 50;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
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 (Fn_pressed) { // Fn is not pressed
|
||||||
|
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 slot with key name from normal matrix
|
||||||
|
send_normals(); // send all slots over USB including the key that just got released
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
// **************end of normal, num lock, and media key section
|
||||||
|
//
|
||||||
|
}
|
||||||
|
go_z(Row_IO[x]); // De-activate Row (send it to hi-z)
|
||||||
|
}
|
||||||
|
//
|
||||||
|
// **********keyboard scan complete*******************************
|
||||||
|
//
|
||||||
|
// Control the 3 keyboard LEDs
|
||||||
|
//
|
||||||
|
if (keyboard_leds & 1<<1) { // mask off all bits but D1 and test if set
|
||||||
|
go_1(CAPS_LED); // turn on the LED
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
go_0(CAPS_LED); // turn off the LED
|
||||||
|
}
|
||||||
|
//
|
||||||
|
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<<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
|
||||||
|
}
|
||||||
|
//
|
||||||
|
// ******************Trackpoint Section******************
|
||||||
|
//
|
||||||
|
mx = 0; // for each loop, start with zero and update only if movement detected
|
||||||
|
my = 0; // same for y
|
||||||
|
// Read the ADC's
|
||||||
|
x_read = analogRead(A11); // read the ADC tied to the X sensor
|
||||||
|
y_read = analogRead(A10); // read the ADC tied to the Y sensor
|
||||||
|
// Check if X or Y movement is beyond the dead zone
|
||||||
|
if ((x_read > (x_center + noise_zone)) || (x_read < (x_center - noise_zone)) || (y_read > (y_center + noise_zone)) || (y_read < (y_center - noise_zone))) {
|
||||||
|
// Only do the following if at least one reading is beyond the dead zone.
|
||||||
|
// Figure out if the X value is to the right or the left of the center resting value
|
||||||
|
if (x_read > x_center) { // is X ADC to the right of the resting position?
|
||||||
|
x_delta = (x_read - x_center) / 10; // find out how far beyond center. Divide by 10 to slow it down.
|
||||||
|
mx = byte(x_delta); // convert signed 16 bit to signed 8 bit
|
||||||
|
}
|
||||||
|
else { // X ADC is equal or to the left of the resting position
|
||||||
|
x_delta = ((x_center - x_read) / 10) * -1; // Answer should be negative so multiply by -1
|
||||||
|
mx = byte(x_delta); // convert signed 16 bit to signed 8 bit
|
||||||
|
}
|
||||||
|
// Figure out if the Y value is above or below the center resting value
|
||||||
|
if (y_read > y_center) { // is Y ADC above the resting position?
|
||||||
|
y_delta = ((y_read - y_center) / 10) * -1; // up movement is negative for Mouse.move function
|
||||||
|
my = byte(y_delta); // convert signed 16 bit to signed 8 bit
|
||||||
|
}
|
||||||
|
else { // Y ADC is equal or below the resting position
|
||||||
|
y_delta = ((y_center - y_read) / 10);
|
||||||
|
my = byte(y_delta); // convert signed 16 bit to signed 8 bit
|
||||||
|
}
|
||||||
|
}
|
||||||
|
// send the x and y data over usb if either one is not at center position
|
||||||
|
if ((mx != 0x00) || (my != 0x00)) {
|
||||||
|
Mouse.move(mx,my);
|
||||||
|
}
|
||||||
|
// ***********************read the touchpad left and right buttons***********************************
|
||||||
|
if (!digitalRead(TP_RIGHT)) { // check if right button is low (low = pushed)
|
||||||
|
right_button = 1; // save state of button
|
||||||
|
}
|
||||||
|
else { // clear right button
|
||||||
|
right_button = 0; // save state of button
|
||||||
|
}
|
||||||
|
if (!digitalRead(TP_LEFT)) { // check if left button is low (low = pushed)
|
||||||
|
left_button = 1; // save state of button
|
||||||
|
}
|
||||||
|
else { // clear left button
|
||||||
|
left_button = 0; // save state of button
|
||||||
|
}
|
||||||
|
// Determine if the left or right mouse buttons have changed (using XOR) since the last cycle
|
||||||
|
button_change = (left_button ^ old_left_button) | (right_button ^ old_right_button);
|
||||||
|
// Don't send button status if there's no change since last time
|
||||||
|
if (button_change){
|
||||||
|
Mouse.set_buttons(left_button, 0, right_button); // send button status over USB
|
||||||
|
}
|
||||||
|
old_left_button = left_button; // remember button status for the next cycle
|
||||||
|
old_right_button = right_button;
|
||||||
|
//
|
||||||
|
// Blink the LED on the Teensy to show a heartbeat
|
||||||
|
//
|
||||||
|
if (blink_count >= 0x54) {
|
||||||
|
digitalWrite(HEARTBEAT_LED, blinky);
|
||||||
|
blinky = !blinky;
|
||||||
|
blink_count = 0;
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
blink_count = blink_count + 1;
|
||||||
|
}
|
||||||
|
//
|
||||||
|
delay(8); // The overall keyboard/trackpoint scanning rate is about 30ms
|
||||||
|
}
|
||||||
Loading…
Reference in a new issue