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Frank Adams 2020-09-25 14:23:49 -07:00 committed by GitHub
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commit 5f66e125f2
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1 changed files with 76 additions and 9 deletions
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83
Example_Touchpads/Touchpad_3p2.ino
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@ -1,4 +1,4 @@
/* Copyright 2019 Frank Adams
/* 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
@ -19,6 +19,7 @@
// Rev 1.1 - Dec 2, 2018 - Replaced ps/2 trackpoint code from playground arduino with my own code
// Rev 1.2 - Feb 2, 2019 - Changed the error routine and added an error LED
// Rev 1.3 - Feb 14, 2019 - Added pinouts for different touchpads
// Rev 1.4 - July 31, 2020 - Added enable command for Elantech touchpads and increased the delay after reset
//
// This code has been tested on the following touchpads:
//
@ -46,7 +47,7 @@
//
// The touchpad ps/2 data and clock lines are connected to the following Teensy I/O pins (modify to match your jumper wires)
#define TP_DATA 14
#define TP_CLK 23
#define TP_CLK 15
// Teensy LED will be lit if the touchpad fails to respond properly during initialization
#define ERROR_LED 13
//
@ -262,7 +263,7 @@ void touchpad_init()
if (tp_read() != 0xfa) { // verify correct ack byte
touchpad_error = HIGH;
}
delay(350); // wait 350ms so tp can run its self diagnostic
delay(1000); // wait 1000ms so tp can run its self diagnostic
// verify proper response from tp
if (tp_read() != 0xaa) { // verify basic assurance test passed
touchpad_error = HIGH;
@ -270,19 +271,85 @@ void touchpad_init()
if (tp_read() != 0x00) { // verify basic assurance test passed
touchpad_error = HIGH;
}
// increase resolution from 4 counts/mm to 8 counts/mm
// Send touchpad disable code
tp_write(0xf5); // tp disable
if (tp_read() != 0xfa) { // verify correct ack byte
// init_error = HIGH;
}
// Load Mode Byte with 00 using the following special sequence from page 38.
// Send set resolution to 0 four times followed by a set sample rate to 0x14
// #1 set resolution
tp_write(0xe8); // set resolution
if (tp_read() != 0xfa) { // verify correct ack byte
// init_error = HIGH;
}
tp_write(0x01); // to zero
if (tp_read() != 0xfa) { // verify correct ack byte
// init_error = HIGH;
}
// #2 set resolution
tp_write(0xe8); // set resolution
if (tp_read() != 0xfa) { // verify correct ack byte
// init_error = HIGH;
}
tp_write(0x00); // to zero
if (tp_read() != 0xfa) { // verify correct ack byte
// init_error = HIGH;
}
// #3 set resolution
tp_write(0xe8); // set resolution
if (tp_read() != 0xfa) { // verify correct ack byte
// init_error = HIGH;
}
tp_write(0x00); // to zero
if (tp_read() != 0xfa) { // verify correct ack byte
// init_error = HIGH;
}
// #4 set resolution
tp_write(0xe8); // set resolution
if (tp_read() != 0xfa) { // verify correct ack byte
// init_error = HIGH;
}
tp_write(0x00); // to zero
if (tp_read() != 0xfa) { // verify correct ack byte
// init_error = HIGH;
}
// Set sample rate
tp_write(0xf3); // set sample rate
if (tp_read() != 0xfa) { // verify correct ack byte
// init_error = HIGH;
}
tp_write(0x14); // to 14 hex
if (tp_read() != 0xfa) { // verify correct ack byte
// init_error = HIGH;
}
// set the resolution
tp_write(0xe8); // Sending resolution command
if (tp_read() != 0xfa) { // verify correct ack byte
touchpad_error = HIGH;
// init_error = HIGH;
}
tp_write(0x03); // value of 03 = 8 counts/mm resolution (default is 4 counts/mm)
tp_write(0x03); // value of 0x03 = 8 counts/mm resolution (default is 4 counts/mm)
if (tp_read() != 0xfa) { // verify correct ack byte
touchpad_error = HIGH;
// init_error = HIGH;
}
// set the sample rate
tp_write(0xf3); // Sending sample rate command
if (tp_read() != 0xfa) { // verify correct ack byte
// init_error = HIGH;
}
tp_write(0x28); // 0x28 = 40 samples per second, the default value used for Synaptics TP
if (tp_read() != 0xfa) { // verify correct ack byte
// init_error = HIGH;
}
// Sending remote mode code so the touchpad will send data only when polled
tp_write(0xf0); // remote mode
if (tp_read() != 0xfa) { // verify correct ack byte
touchpad_error = HIGH;
// touchpad_error = HIGH;
}
// Sending touchpad enable code (needed for Elan touchpads)
tp_write(0xf4); // tp enable
if (tp_read() != 0xfa) { // verify correct ack byte
// touchpad_error = HIGH;
}
}
// ************************************Begin Routine*********************************************************