380 lines
12 KiB
C++
380 lines
12 KiB
C++
/* 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.
|
|
*/
|
|
// It will determine how a laptop keyboard matrix is wired using a Teensy LC on a Zenith Supersport FPC daughterboard .
|
|
// Open an editor on a computer and load or create a file that lists every key
|
|
// on the laptop keyboard that will be tested. Connect the FPC cable of the test keyboard
|
|
// to the Teensy/FPC board. Connect a USB cable from the Teensy to the computer.
|
|
// Wait 20 seconds for the computer to see the Teensy as a keyboard. If numbers are reported on the screen
|
|
// before any keys are pressed, these pin numbers are shorted together and must be fixed.
|
|
// Press each key one by one on the test keyboard as listed on the editor screen. When a key
|
|
// is pressed on the test keyboard, the program detects which two pins on the FPC connector
|
|
// were connected. Those two pin numbers are sent over USB (separated by a TAB) and displayed
|
|
// on the editor. After sending the numbers, a DOWN ARROW is sent over USB to prepare for
|
|
// the next key. Once all keys on the test keyboard have been pressed, the file in
|
|
// the editor can be saved to create a row-column matrix.
|
|
//
|
|
// If your keyboard has diodes, you must pay attention to the order of the two pins that are reported by the Teensy. The code performs
|
|
// a bottom up test first, followed by a top down test so that one of the two tests will forward bias the diode.
|
|
// The first pin reported over USB is the cathode side and the second pin is the anode side. The diode direction must be taken into
|
|
// account when programming the TMK or Teensyduino keyboard routine.
|
|
//
|
|
// Revision History
|
|
// Rev 1.00 - June 6, 2020 - Original Release
|
|
//
|
|
// Load an array with the Teensy LC I/O numbers that correspond to FPC pins 1 thru 26.
|
|
int con_pin[] = {12, 11, 10, 15, 9, 8, 7, 18, 6, 19, 20, 4, 25, 3, 2, 1, 22, 0};
|
|
//
|
|
// Define maximum and minimum pin numbers that will be tested.
|
|
//
|
|
int max_pin = 18; // the last pin to be tested on the FPC connector
|
|
int min_pin = 1; // the first pin to be tested on the FPC connector
|
|
//
|
|
// load the key codes used in sending usb numbers, tab, and down arrow
|
|
int key_1 = KEY_1;
|
|
int key_2 = KEY_2;
|
|
int key_3 = KEY_3;
|
|
int key_4 = KEY_4;
|
|
int key_5 = KEY_5;
|
|
int key_6 = KEY_6;
|
|
int key_7 = KEY_7;
|
|
int key_8 = KEY_8;
|
|
int key_9 = KEY_9;
|
|
int key_0 = KEY_0;
|
|
int key_tab = KEY_TAB;
|
|
int key_down = KEY_DOWN;
|
|
//
|
|
// Function to set a pin as an input with a pullup so it's high unless grounded by a key press
|
|
void go_z(int pin)
|
|
{
|
|
pinMode(pin, INPUT_PULLUP);
|
|
digitalWrite(pin, HIGH);
|
|
}
|
|
|
|
// Function to set a pin as an output and drive it to a logic low (0 volts)
|
|
void go_0(int pin)
|
|
{
|
|
pinMode(pin, OUTPUT);
|
|
digitalWrite(pin, LOW);
|
|
}
|
|
|
|
// Function to send numbers over USB for display on an editor
|
|
void usb_num(int num) // the numbers 0 thru 33 are sent over usb as 1 thru 34
|
|
{
|
|
switch (num) {
|
|
case 0:
|
|
Keyboard.set_key1(key_1);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 1:
|
|
Keyboard.set_key1(key_2);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 2:
|
|
Keyboard.set_key1(key_3);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 3:
|
|
Keyboard.set_key1(key_4);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 4:
|
|
Keyboard.set_key1(key_5);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 5:
|
|
Keyboard.set_key1(key_6);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 6:
|
|
Keyboard.set_key1(key_7);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 7:
|
|
Keyboard.set_key1(key_8);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 8:
|
|
Keyboard.set_key1(key_9);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 9:
|
|
Keyboard.set_key1(key_1);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_0);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 10:
|
|
Keyboard.set_key1(key_1);
|
|
Keyboard.send_now();
|
|
delay(50);
|
|
Keyboard.set_key1(0);
|
|
Keyboard.send_now();
|
|
delay(50);
|
|
Keyboard.set_key2(key_1);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 11:
|
|
Keyboard.set_key1(key_1);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_2);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 12:
|
|
Keyboard.set_key1(key_1);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_3);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 13:
|
|
Keyboard.set_key1(key_1);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_4);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 14:
|
|
Keyboard.set_key1(key_1);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_5);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 15:
|
|
Keyboard.set_key1(key_1);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_6);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 16:
|
|
Keyboard.set_key1(key_1);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_7);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 17:
|
|
Keyboard.set_key1(key_1);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_8);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 18:
|
|
Keyboard.set_key1(key_1);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_9);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 19:
|
|
Keyboard.set_key1(key_2);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_0);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 20:
|
|
Keyboard.set_key1(key_2);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_1);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 21:
|
|
Keyboard.set_key1(key_2);
|
|
Keyboard.send_now();
|
|
delay(50);
|
|
Keyboard.set_key1(0);
|
|
Keyboard.send_now();
|
|
delay(50);
|
|
Keyboard.set_key2(key_2);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 22:
|
|
Keyboard.set_key1(key_2);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_3);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 23:
|
|
Keyboard.set_key1(key_2);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_4);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 24:
|
|
Keyboard.set_key1(key_2);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_5);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 25:
|
|
Keyboard.set_key1(key_2);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_6);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 26:
|
|
Keyboard.set_key1(key_2);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_7);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 27:
|
|
Keyboard.set_key1(key_2);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_8);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 28:
|
|
Keyboard.set_key1(key_2);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_9);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 29:
|
|
Keyboard.set_key1(key_3);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_0);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 30:
|
|
Keyboard.set_key1(key_3);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_1);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 31:
|
|
Keyboard.set_key1(key_3);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_2);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 32:
|
|
Keyboard.set_key1(key_3);
|
|
Keyboard.send_now();
|
|
delay(50);
|
|
Keyboard.set_key1(0);
|
|
Keyboard.send_now();
|
|
delay(50);
|
|
Keyboard.set_key2(key_3);
|
|
Keyboard.send_now();
|
|
break;
|
|
case 33:
|
|
Keyboard.set_key1(key_3);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key2(key_4);
|
|
Keyboard.send_now();
|
|
break;
|
|
}
|
|
delay(20);
|
|
Keyboard.set_key1(0); // clear out the key slots
|
|
Keyboard.set_key2(0);
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key1(key_tab); // Tab over to position for next number
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key1(0); // clear out the tab from the slot
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
}
|
|
|
|
// Function to send a down arrow over usb to position for the next key
|
|
void down_arrow(void) {
|
|
Keyboard.set_key1(key_down); // send a down arrow
|
|
Keyboard.send_now();
|
|
delay(20);
|
|
Keyboard.set_key1(0); // clear the down arrow
|
|
Keyboard.send_now();
|
|
}
|
|
|
|
// --------------------------------------------------Setup-----------------------------------
|
|
void setup() {
|
|
for (int k = 0; k < max_pin; k++) { // loop thru all connector pins
|
|
go_z(con_pin[k]); // set each pin as an input with a pullup
|
|
}
|
|
delay(15000); // Wait for the host to connect to the Teensy as a keyboard. If 2 pins are shorted
|
|
// you want the host to be ready to receive the pin numbers.
|
|
}
|
|
//
|
|
int blink_count = 0; // loop counter
|
|
boolean blinky = LOW; // Blink LED state
|
|
// -------------------------------------------Main Loop--------------------------------------
|
|
//
|
|
void loop() {
|
|
//
|
|
// ***********Bottom up Test************
|
|
//
|
|
for (int i=min_pin-1; i<max_pin-1; i++) { // outer loop pin (min_pin-1 is typically = 0)
|
|
go_0(con_pin[i]); // make the outer loop pin an output and send this pin low
|
|
for (int j=i+1; j<max_pin; j++) { // inner loop pin
|
|
delayMicroseconds(10); // give time to let the signals settle out
|
|
if (!digitalRead(con_pin[j])) { // check for connection between inner and outer pins
|
|
usb_num(i); // send outer loop pin number over usb
|
|
usb_num(j); // send inner loop pin number over usb
|
|
down_arrow(); // send a down arrow over usb
|
|
while(!digitalRead(con_pin[j])) { // wait until key is released
|
|
; // if 2 pins are shorted, the code will hang here waiting for their release
|
|
}
|
|
}
|
|
}
|
|
go_z(con_pin[i]); // return the outer loop pin to float with pullup
|
|
}
|
|
//
|
|
// *********Top down Test***********
|
|
//
|
|
for (int p=max_pin-1; p>min_pin-1; p--) { // outer loop pin
|
|
go_0(con_pin[p]); // make the outer loop pin an output and send this pin low
|
|
for (int r=p-1; r>=min_pin-1; r--) { // inner loop pin
|
|
delayMicroseconds(10); // give time to let the signals settle out
|
|
if (!digitalRead(con_pin[r])) { // check for connection between inner and outer pins
|
|
usb_num(p); // send outer loop pin number over usb
|
|
usb_num(r); // send inner loop pin number over usb
|
|
down_arrow(); // send a down arrow over usb
|
|
while(!digitalRead(con_pin[r])) { // wait until key is released
|
|
;
|
|
}
|
|
}
|
|
}
|
|
go_z(con_pin[p]); // return the outer loop pin to float with pullup
|
|
}
|
|
//
|
|
// Blink the LED to show the Teensy is alive
|
|
//
|
|
if (blink_count == 0x0a) {
|
|
pinMode(13, OUTPUT);
|
|
digitalWrite(13, blinky);
|
|
blinky = !blinky;
|
|
blink_count = 0;
|
|
}
|
|
else {
|
|
blink_count++;
|
|
}
|
|
delay(25); // overall keyboard scan rate is about 30 milliseconds
|
|
//
|
|
}
|