medvedych/USB_Laptop_Keyboard_Controller
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Frank Adams 2018-12-01 00:03:16 -08:00 committed by GitHub
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Example_Touchpads/Touchpad_3p2.ino
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// This software is in the public domain
// It interfaces the Teensy 3.2 with a PS/2 touchpad found in an HP DV9000 laptop.
/* Copyright 2018 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 PS/2 touchpad found in an HP DV9000 laptop.
// The PS/2 code was originally from https://playground.arduino.cc/uploads/ComponentLib/mouse.txt
// but the interface to the PC was changed from RS232 serial to USB using the PJRC Mouse functions.
// A watchdog timer was also added to the "while loops" so the code doesn't hang if the Teensy is
@ -19,6 +29,7 @@
// The ps/2 signals are at 5 volts from the touchpad to the Teensy which is 5 volt tolerant.
// The ps/2 signals are at 3.3 volts from the Teensy to the touchpad which is enough to be a logic high.
// In the Arduino IDE, select Tools, Teensy 3.2. Also under Tools, select Keyboard+Mouse+Joystick
//
// Revision History
// Initial Release Nov 23, 2018
//