From dc0d2738331a4baef510d74e97dd1a396fa2fe34 Mon Sep 17 00:00:00 2001 From: Frank Adams Date: Sun, 7 Jun 2020 16:49:38 -0700 Subject: [PATCH] Add files via upload --- .../IBM Thinkpad 380ED/IBM_380_revD.ino | 564 ++++++++++++++++++ 1 file changed, 564 insertions(+) create mode 100644 Example_Keyboards/IBM Thinkpad 380ED/IBM_380_revD.ino diff --git a/Example_Keyboards/IBM Thinkpad 380ED/IBM_380_revD.ino b/Example_Keyboards/IBM Thinkpad 380ED/IBM_380_revD.ino new file mode 100644 index 0000000..77e3d18 --- /dev/null +++ b/Example_Keyboards/IBM Thinkpad 380ED/IBM_380_revD.ino @@ -0,0 +1,564 @@ +/* Copyright 2020 Frank Adams + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + http://www.apache.org/licenses/LICENSE-2.0 + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. +*/ +// This software implements an IBM Thinkpad 380ED Laptop USB Keyboard/Trackpoint Controller. +// It uses a Teensy 3.2 on a custom FPC connector board that also has the amplifiers for the +// trackpoint that are fed into the Teensy ADC. +// +// Revision History +// Initial Release May 16, 2020 +// Rev A May 17, 2020 - Added Fn-F9,F10,F11,F12 adjustments for trackpoint +// Rev B May 27, 2020 - Changed Dead Zone methodology +// Rev C May 27, 2020 - Reduced noise_zone from 50 to 15; Reduced delay from 25ms to 8ms +// Rev D June 7, 2020 - Added middle trackpoint button +// +#define MODIFIERKEY_FN 0x8f // give Fn key a fake HID code +#define CAPS_LED 14 // Teensy I/O's connected to thru hole pads with resistors for LEDs +#define NUM_LED 15 +#define SCRL_LED 16 +#define HEARTBEAT_LED 13 // onboard LED set to blink +#define TP_LEFT 20 // Trackpoint mouse buttons connected to Teensy I/O's with pullups +#define TP_RIGHT 5 +#define TP_RETURN 30 // will be driven low +// +const byte rows_max = 17; // sets the number of rows in the keyboard matrix +const byte cols_max = 9; // sets the number of columns in the keyboard matrix +// +// Load the normal key matrix with the Teensyduino key names +// described at www.pjrc.com/teensy/td_keyboard.html +// A zero indicates no normal key at that location. +int normal[rows_max][cols_max] = { + {KEY_ESC,KEY_TAB,KEY_TILDE,KEY_1,0,0,KEY_Z,KEY_A,KEY_Q}, + {0,KEY_CAPS_LOCK,KEY_F1,KEY_2,0,0,KEY_X,KEY_S,KEY_W}, + {0,0,0,0,0,0,0,0,0}, + {KEY_G,KEY_T,KEY_5,KEY_4,KEY_B,0,KEY_V,KEY_F,KEY_R}, + {KEY_H,KEY_Y,KEY_6,KEY_7,KEY_N,0,KEY_M,KEY_J,KEY_U}, + {KEY_F6,KEY_LEFT_BRACE,KEY_EQUAL,KEY_8,0,0,KEY_COMMA,KEY_K,KEY_I}, + {KEY_UP,0,KEY_HOME,KEY_END,KEY_LEFT,0,KEY_PAUSE,0,0}, + {0,0,KEY_PAGE_UP,KEY_PAGE_DOWN,0,0,0,0,0}, + {KEY_F4,KEY_F3,KEY_F2,KEY_3,0,0,KEY_C,KEY_D,KEY_E}, + {KEY_QUOTE,KEY_LEFT_BRACE,KEY_MINUS,KEY_0,KEY_SLASH,0,0,KEY_SEMICOLON,KEY_P}, + {KEY_F5,KEY_BACKSPACE,KEY_F9,KEY_F10,KEY_SPACE,0,KEY_ENTER,KEY_BACKSLASH,0}, + {0,0,KEY_DELETE,KEY_F11,KEY_DOWN,0,0,0,0}, + {0,0,0,KEY_PRINTSCREEN,0,0,0,0,KEY_NUM_LOCK}, + {0,0,KEY_INSERT,KEY_F12,KEY_RIGHT,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,KEY_F7,KEY_F8,KEY_9,0,0,KEY_PERIOD,KEY_L,KEY_O} +}; +// Load the numlock key matrix with key names at the correct row-column location. +// This matrix is the same as the normal matrix except for the number pad keys +// A zero indicates no numlock key at that location. +int numlock[rows_max][cols_max] = { + {KEY_ESC,KEY_TAB,KEY_TILDE,KEY_1,0,0,KEY_Z,KEY_A,KEY_Q}, + {0,KEY_CAPS_LOCK,KEY_F1,KEY_2,0,0,KEY_X,KEY_S,KEY_W}, + {0,0,0,0,0,0,0,0,0}, + {KEY_G,KEY_T,KEY_5,KEY_4,KEY_B,0,KEY_V,KEY_F,KEY_R}, + {KEY_H,KEY_Y,KEY_6,KEYPAD_7,KEY_N,0,KEYPAD_0,KEYPAD_1,KEYPAD_4}, + {KEY_F6,KEY_LEFT_BRACE,KEY_EQUAL,KEYPAD_8,0,0,KEY_COMMA,KEYPAD_2,KEYPAD_5}, + {KEY_UP,0,KEY_HOME,KEY_END,KEY_LEFT,0,KEY_PAUSE,0,0}, + {0,0,KEY_UP,KEY_DOWN,0,0,0,0,0}, + {KEY_F4,KEY_F3,KEY_F2,KEY_3,0,0,KEY_C,KEY_D,KEY_E}, + {KEY_QUOTE,KEY_LEFT_BRACE,KEY_MINUS,KEYPAD_SLASH,KEYPAD_PLUS,0,0,KEYPAD_MINUS,KEYPAD_ASTERIX}, + {KEY_F5,KEY_BACKSPACE,KEY_F9,KEY_F10,KEY_SPACE,0,KEY_ENTER,KEY_BACKSLASH,0}, + {0,0,KEY_DELETE,KEY_F11,KEY_DOWN,0,0,0,0}, + {0,0,0,KEY_PRINTSCREEN,0,0,0,0,KEY_NUM_LOCK}, + {0,0,KEY_INSERT,KEY_F12,KEY_RIGHT,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,KEY_F7,KEY_F8,KEYPAD_9,0,0,KEYPAD_PERIOD,KEYPAD_3,KEYPAD_6} +}; +// Load the modifier key matrix with key names at the correct row-column location. +// A zero indicates no modifier key at that location. +int modifier[rows_max][cols_max] = { + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,MODIFIERKEY_LEFT_CTRL,0,0,0,MODIFIERKEY_RIGHT_CTRL,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {MODIFIERKEY_LEFT_ALT,0,0,0,MODIFIERKEY_RIGHT_ALT,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,MODIFIERKEY_FN,0,0,0}, + {0,MODIFIERKEY_LEFT_SHIFT,0,0,0,0,MODIFIERKEY_RIGHT_SHIFT,0,0}, + {0,0,0,0,0,0,0,0,0} +}; +// Load the media key matrix with Fn key names at the correct row-column location. +// A zero indicates no media key at that location. +int media[rows_max][cols_max] = { + {0,0,0,0,0,0,0,0,0}, + {0,0,KEY_MEDIA_MUTE,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,KEY_MEDIA_VOLUME_INC,KEY_MEDIA_VOLUME_DEC,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,KEY_SYSTEM_WAKE_UP,0,0,0,0,KEY_SCROLL_LOCK}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0}, + {0,0,0,0,0,0,0,0,0} +}; +// Initialize the old_key matrix with one's (nothing pressed). +// 1 = key not pressed, 0 = key is pressed +boolean old_key[rows_max][cols_max] = { + {1,1,1,1,1,1,1,1,1}, + {1,1,1,1,1,1,1,1,1}, + {1,1,1,1,1,1,1,1,1}, + {1,1,1,1,1,1,1,1,1}, + {1,1,1,1,1,1,1,1,1}, + {1,1,1,1,1,1,1,1,1}, + {1,1,1,1,1,1,1,1,1}, + {1,1,1,1,1,1,1,1,1}, + {1,1,1,1,1,1,1,1,1}, + {1,1,1,1,1,1,1,1,1}, + {1,1,1,1,1,1,1,1,1}, + {1,1,1,1,1,1,1,1,1}, + {1,1,1,1,1,1,1,1,1}, + {1,1,1,1,1,1,1,1,1}, + {1,1,1,1,1,1,1,1,1}, + {1,1,1,1,1,1,1,1,1}, + {1,1,1,1,1,1,1,1,1} +}; +// +// Assign the Teensy I/O row numbers +int Row_IO[rows_max] = {7,8,9,10,11,12,18,19,24,25,26,27,28,29,31,32,33}; +// +// Assign the column I/O numbers +int Col_IO[cols_max] = {0,1,2,3,4,6,21,22,23}; + +// declare and initialize trackpoint variables +int x_read; // stores the reading from the X ADC +int y_read; // same for the Y ADC +char mx; // signed byte used by the Mouse.move function for x value. Positive value moves to the right +char my; // positive y value moves down +int x_delta; // signed 16 bit value gives x movement amount +int y_delta; // y version. +int x_center; //resting position of x sensor +int y_center; //resting position of y sensor +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. + // Increase this number if the cursor moves without touching the TP. Decrease if too much force is needed. +boolean left_button = 0; // on/off variable for left button, 1 = pushed +boolean right_button = 0; // on/off variable for right button, 1 = pushed +boolean middle_button = 0; // on/off variable for middle button, 1 = pushed +boolean old_left_button = 0; // on/off variable for left button from the previous cycle +boolean old_right_button = 0; // on/off variable for right button from the previous cycle +boolean old_middle_button = 0; // on/off variable for middle button from the previous cycle +boolean button_change = 0; // Shows when the left or right buttons have changed, 1 = change +// declare keyboard variables +boolean slots_full = LOW; // Goes high when slots 1 thru 6 contain normal keys +// slot 1 thru slot 6 hold the normal key values to be sent over USB. +int slot1 = 0; //value of 0 means the slot is empty and can be used. +int slot2 = 0; +int slot3 = 0; +int slot4 = 0; +int slot5 = 0; +int slot6 = 0; +// +int mod_shift_l = 0; // These variables are sent over USB as modifier keys. +int mod_shift_r = 0; // Each is either set to 0 or MODIFIER_ ... +int mod_ctrl_l = 0; +int mod_ctrl_r = 0; +int mod_alt_l = 0; +int mod_alt_r = 0; +int mod_gui = 0; +// +// 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(); +} +// +// 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 + } +// Check left mouse button and also the Fn key + if (!digitalRead(TP_LEFT)) { // check if left button is low (low = pushed) + if (Fn_pressed) { // Fn is not pushed + left_button = 1; // set the left button + } + else { // Fn is pushed + middle_button = 1; // set the middle button + } + } + else { // left button is not set + if (Fn_pressed) { // Fn is not pushed + left_button = 0; // clear the left button + } + else { // Fn is pushed + middle_button = 0; // clear the middle button + } + } +// Determine if the buttons have changed (using XOR) since the last 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 over USB + } + old_left_button = left_button; // remember button status for the next cycle + old_right_button = right_button; + old_middle_button = middle_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 13ms +}