diff --git a/Example_Keyboards/IBM Thinkpad 380ED/Trackpoint_380.ino b/Example_Keyboards/IBM Thinkpad 380ED/Trackpoint_380.ino deleted file mode 100644 index 80d2387..0000000 --- a/Example_Keyboards/IBM Thinkpad 380ED/Trackpoint_380.ino +++ /dev/null @@ -1,127 +0,0 @@ -/* 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 interfaces the Teensy 3.2 with a Thinkpad 380ED laptop trackpoint. -// The trackpoint strain gauge resistors are fed to an instrumentation amplifier which drives the -// Teensy ADC inputs. -// In the Arduino IDE, select Tools, Teensy 3.2. Also under Tools, select Keyboard+Mouse+Joystick -// -// Revision History -// Rev 1.0 - April 22, 2020 - Original Release -// Rev 1.1 - May 15, 2020 - Now using OSH Park PCB. Swapped A10 & A11. Added left & right mouse buttons. -// -// Defines -#define TP_LEFT 20 // Trackpoint mouse buttons connected to Teensy 3.2 I/O's -#define TP_RIGHT 5 -#define TP_RETURN 30 -// declare and initialize 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 = 50; // 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 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 button_change = 0; // Shows when the left or right buttons have changed, 1 = change -// -// 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); -} -// - -void 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); // send the buttons return pin low always - 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 -// When the keyboard code is added, detect when Fn - F8 is pushed to indicate that -// x_center and y_center should be read again from the ADC. This would be because -// the operator notices the cursor is moving without being pushed. -} -// -// ************************************Main Loop*************************************************************** -void loop() { - mx = 0; // for each loop, start with zero and update only if movement detected - my = 0; // same for y - - x_read = analogRead(A11); // read the ADC tied to the X sensor - if (x_read > (x_center + noise_zone)) { // is ADC to the right of the noise zone beyond the resting position? - x_delta = (x_read - (x_center + noise_zone)) / 10; // find out how far beyond noise zone. Divide by 10 to slow it down. - mx = byte(x_delta); // convert signed 16 bit to signed 8 bit - } - else if (x_read < (x_center - noise_zone)) { // is ADC to the left of the noise zone beyond the resting position? - x_delta = (((x_center - noise_zone) - x_read) / 10) * -1; // Answer should be negative so multiply by -1 - mx = byte(x_delta); - } - - y_read = analogRead(A10); // read the ADC tied to the Y sensor - if (y_read > (y_center + noise_zone)) { - y_delta = ((y_read - (y_center + noise_zone)) / 10) * -1; // up movement is negative for Mouse.move function - my = byte(y_delta); - } - else if (y_read < (y_center - noise_zone)) { - y_delta = (((y_center - noise_zone) - y_read) / 10); - my = byte(y_delta); - } - -// 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; -// -// **************************************End of trackpoint routine*********************************** -// - delay(30); // wait 30ms before repeating next polling cycle -}