medvedych/USB_Laptop_Keyboard_Controller
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Add files via upload

Browse source
This commit is contained in:
Frank Adams 2019-02-05 08:45:22 -08:00 committed by GitHub
parent af698ef8f9
commit 570d8681e3
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 115 additions and 109 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

224
Example_Keyboards/Dell_Latitude_D630/Dell_D630_Keyboard_and_Touchpad.ino
View file

@ -1,4 +1,4 @@
/* Copyright 2018 Frank Adams /* Copyright 2019 Frank Adams
Licensed under the Apache License, Version 2.0 (the "License"); Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License. you may not use this file except in compliance with the License.
You may obtain a copy of the License at You may obtain a copy of the License at
@ -11,33 +11,32 @@
*/ */
// This software implements a Dell Latitude D630 Laptop Keyboard Controller and PS/2 Touchpad Controller // This software implements a Dell Latitude D630 Laptop Keyboard Controller and PS/2 Touchpad Controller
// using a Teensy 3.2 on a daughterboard with a 34 pin FPC connector. The keyboard part number // using a Teensy 3.2 on a daughterboard with a 34 pin FPC connector. The keyboard part number
// is DP/N 0DR160. The Touchpad from an HP DV9000 is part number 920-000702-04 Rev A. // is DP/N 0DR160. The Touchpad is from a Dell D630. The touchpad chip part number is 3JA1CA024B.
// This routine uses the Teensyduino "Micro-Manager Method" to send Normal and Modifier // This routine uses the Teensyduino "Micro-Manager Method" to send Normal and Modifier
// keys over USB. Multi-media keys are sent with keyboard press and release functions. // keys over USB. Multi-media keys are sent with keyboard press and release functions.
// Description of Teensyduino keyboard functions is at www.pjrc.com/teensy/td_keyboard.html // Description of Teensyduino keyboard functions is at www.pjrc.com/teensy/td_keyboard.html
// The PS/2 code has a watchdog timer so the code doesn't hang if the Teensy is // The PS/2 code has a watchdog timer so the code doesn't hang if the Teensy is interrupted by USB traffic.
// interrupted by I2C or USB traffic.
// //
// The test points on the touchpad were wired to a Teensy 3.2 as follows:
// T22 = 5V wired to the Teensy Vin pin
// T23 = Gnd wired to the Teensy Ground pin It's hard to solder to T23 so I soldered to a bypass cap gnd pad.
// T10 = Clock wired to the Teensy I/O 14 pin Pull up to 5 volts is in the touchpad
// T11 = Data wired to the Teensy I/O 15 pin Pull up to 5 volts is in the touchpad
// In the Arduino IDE, select Tools, Teensy 3.2. Also under Tools, select Keyboard+Mouse+Joystick // In the Arduino IDE, select Tools, Teensy 3.2. Also under Tools, select Keyboard+Mouse+Joystick
// //
// Revision History // Revision History
// Rev 1.0 - Nov 15, 2018 - Original Release // Rev 1.0 - Nov 15, 2018 - Original Release
// Rev 1.1 - Dec 2, 2018 - Replaced ps/2 touchpad code from playground arduino with my own code // Rev 1.1 - Dec 2, 2018 - Replaced ps/2 touchpad code from playground arduino with my own code
// Rev 1.2 - Dec 25, 2018 - Changed I/O numbers, inverted the caps lock signal and changed to Dell D630 touchpad
// Rev 1.3 - Jan 22, 2018 - Added Heartbeat LED and improved touchpad response
// //
// //
#define MODIFIERKEY_FN 0x8f // give Fn key a HID code #define MODIFIERKEY_FN 0x8f // give Fn key a HID code
#define CAPS_LED 13 // Teensy LED shows Caps-Lock #define CAPS_LED 30 // Caps lock LED on keyboard shows bit 1 in keyboard_led variable
#define SCRL_LED 29 // Scroll lock LED on keyboard shows bit 2 in keyboard_leds variable
#define NUM_LED 31 // Num lock LED on keyboard shows bit 0 in keyboard_leds variable
#define HEARTBEAT_LED 13 // LED on Teensy blinks to show its alive
// //
#define TP_DATA 15 // Touchpad ps/2 data connected to Teensy I/O pin 15 #define TP_DATA 14 // Touchpad ps/2 data connected to Teensy I/O pin 14
#define TP_CLK 14 // Touchpad ps/2 clock connected to Teensy I/O pin 14 #define TP_CLK 23 // Touchpad ps/2 clock connected to Teensy I/O pin 23
// //
// //
const byte rows_max = 17; // sets the number of rows in the matrix const byte rows_max = 18; // sets the number of rows in the matrix
const byte cols_max = 8; // sets the number of columns in the matrix const byte cols_max = 8; // sets the number of columns in the matrix
// //
// Load the normal key matrix with the Teensyduino key names described at www.pjrc.com/teensy/td_keyboard.html // Load the normal key matrix with the Teensyduino key names described at www.pjrc.com/teensy/td_keyboard.html
@ -60,6 +59,7 @@ int normal[rows_max][cols_max] = {
{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_PAGE_UP,KEY_PAGE_DOWN,0,0}, {0,0,0,0,KEY_PAGE_UP,KEY_PAGE_DOWN,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}
}; };
// Load the modifier key matrix with key names at the correct row-column location. // Load the modifier key matrix with key names at the correct row-column location.
@ -81,9 +81,11 @@ int modifier[rows_max][cols_max] = {
{0,0,MODIFIERKEY_LEFT_SHIFT,0,0,0,MODIFIERKEY_RIGHT_SHIFT,0}, {0,0,MODIFIERKEY_LEFT_SHIFT,0,0,0,MODIFIERKEY_RIGHT_SHIFT,0},
{0,MODIFIERKEY_LEFT_CTRL,0,0,0,0,MODIFIERKEY_RIGHT_CTRL,0}, {0,MODIFIERKEY_LEFT_CTRL,0,0,0,0,MODIFIERKEY_RIGHT_CTRL,0},
{0,0,0,MODIFIERKEY_GUI,0,0,0,0}, {0,0,0,MODIFIERKEY_GUI,0,0,0,0},
{0,0,0,0,0,MODIFIERKEY_FN,0,0} {0,0,0,0,0,MODIFIERKEY_FN,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. // Load the media key matrix with Fn key names at the correct row-column location.
// Notice the volume controls need the Fn key pressed.
// A zero indicates no media key at that location. // A zero indicates no media key at that location.
int media[rows_max][cols_max] = { int media[rows_max][cols_max] = {
{0,0,0,0,0,0,0,0}, {0,0,0,0,0,0,0,0},
@ -102,7 +104,8 @@ int media[rows_max][cols_max] = {
{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,KEY_MEDIA_VOLUME_DEC,0,KEY_MEDIA_VOLUME_INC,KEY_MEDIA_MUTE,0}
}; };
// Initialize the old_key matrix with one's. // Initialize the old_key matrix with one's.
// 1 = key not pressed, 0 = key is pressed // 1 = key not pressed, 0 = key is pressed
@ -121,22 +124,23 @@ 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}
}; };
// //
// Define the Teensy 3.2 I/O numbers (translated from the FPC pin #) // Define the Teensy 3.2 I/O numbers (translated from the FPC pin #)
// Row FPC pin # 02,03,04,05,06,07,08,09,10,11,12,13,14,15,16,17,18 // Row FPC pin # 02,03,04,05,06,07,08,09,10,11,12,13,14,15,16,17,18,31
// Teensy I/O # 00,22,01,21,02,20,03,19,04,18,05,17,06,24,07,25,08 // Teensy I/O # 00,22,01,21,02,20,03,19,04,18,05,17,06,24,07,25,08,16
int Row_IO[rows_max] = {0,22,1,21,2,20,3,19,4,18,5,17,6,24,7,25,8}; // Teensy 3.2 I/O numbers for rows int Row_IO[rows_max] = {0,22,1,21,2,20,3,19,4,18,5,17,6,24,7,25,8,16}; // Teensy 3.2 I/O numbers for rows
// //
// Column FPC pin # 19,20,21,22,23,24,25,26 // Column FPC pin # 19,20,21,22,23,24,25,26
// Teensy I/O # 33,09,26,10,27,11,28,12 // Teensy I/O # 33,09,26,10,27,11,28,12
int Col_IO[cols_max] = {33,9,26,10,27,11,28,12}; // Teensy 3.2 I/O numbers for columns int Col_IO[cols_max] = {33,9,26,10,27,11,28,12}; // Teensy 3.2 I/O numbers for columns
// Declare variables that will be used by functions // Declare variables that will be used by functions
boolean touchpad_error = LOW; // sent high when touch pad routine times out boolean touchpad_error = LOW; // set high if the touchpad failes to give the correct response
boolean slots_full = LOW; // Goes high when slots 1 thru 6 contain normal keys 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. // 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 slot1 = 0; //value of 0 means the slot is empty and can be used.
@ -310,25 +314,25 @@ void tp_write(char send_data)
elapsedMillis watchdog; // zero the watchdog timer clock elapsedMillis watchdog; // zero the watchdog timer clock
char odd_parity = 0; // clear parity bit count char odd_parity = 0; // clear parity bit count
// Enable the bus by floating the clock and data // Enable the bus by floating the clock and data
go_z(TP_CLK); // go_pu(TP_CLK); //
go_z(TP_DATA); // go_pu(TP_DATA); //
delayMicroseconds(250); // wait before requesting the bus delayMicroseconds(250); // wait before requesting the bus
go_0(TP_CLK); // Send the Clock line low to request to transmit data go_0(TP_CLK); // Send the Clock line low to request to transmit data
delayMicroseconds(100); // wait for 100 microseconds per bus spec delayMicroseconds(100); // wait for 100 microseconds per bus spec
go_0(TP_DATA); // Send the Data line low (the start bit) go_0(TP_DATA); // Send the Data line low (the start bit)
delayMicroseconds(1); // delayMicroseconds(1); //
go_z(TP_CLK); // Release the Clock line so it is pulled high go_pu(TP_CLK); // Release the Clock line so it is pulled high
delayMicroseconds(1); // give some time to let the clock line go high delayMicroseconds(1); // give some time to let the clock line go high
while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low
if (watchdog >= timeout) { //check for infinite loop if (watchdog >= timeout) { //check for infinite loop
touchpad_error = HIGH; // set error flag // touchpad_error = HIGH; // set error flag
break; // break out of infinite loop break; // break out of infinite loop
} }
} }
// send the 8 bits of send_data // send the 8 bits of send_data
for (int j=0; j<8; j++) { for (int j=0; j<8; j++) {
if (send_data & 1) { //check if lsb is set if (send_data & 1) { //check if lsb is set
go_z(TP_DATA); // send a 1 to TP go_pu(TP_DATA); // send a 1 to TP
odd_parity = odd_parity + 1; // keep running total of 1's sent odd_parity = odd_parity + 1; // keep running total of 1's sent
} }
else { else {
@ -337,14 +341,12 @@ void tp_write(char send_data)
delayMicroseconds(1); // delay to let the clock settle out delayMicroseconds(1); // delay to let the clock settle out
while (digitalRead(TP_CLK) == LOW) { // loop until the clock goes high while (digitalRead(TP_CLK) == LOW) { // loop until the clock goes high
if (watchdog >= timeout) { //check for infinite loop if (watchdog >= timeout) { //check for infinite loop
touchpad_error = HIGH; // set error flag
break; // break out of infinite loop break; // break out of infinite loop
} }
} }
delayMicroseconds(1); // delay to let the clock settle out delayMicroseconds(1); // delay to let the clock settle out
while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low
if (watchdog >= timeout) { //check for infinite loop if (watchdog >= timeout) { //check for infinite loop
touchpad_error = HIGH; // set error flag
break; // break out of infinite loop break; // break out of infinite loop
} }
} }
@ -355,37 +357,32 @@ void tp_write(char send_data)
go_0(TP_DATA); // already odd so send a 0 to TP go_0(TP_DATA); // already odd so send a 0 to TP
} }
else { else {
go_z(TP_DATA); // send a 1 to TP to make parity odd go_pu(TP_DATA); // send a 1 to TP to make parity odd
} }
delayMicroseconds(1); // delay to let the clock settle out delayMicroseconds(1); // delay to let the clock settle out
while (digitalRead(TP_CLK) == LOW) { // loop until the clock goes high while (digitalRead(TP_CLK) == LOW) { // loop until the clock goes high
if (watchdog >= timeout) { //check for infinite loop if (watchdog >= timeout) { //check for infinite loop
touchpad_error = HIGH; // set error flag
break; // break out of infinite loop break; // break out of infinite loop
} }
} }
delayMicroseconds(1); // delay to let the clock settle out delayMicroseconds(1); // delay to let the clock settle out
while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low
if (watchdog >= timeout) { //check for infinite loop if (watchdog >= timeout) { //check for infinite loop
touchpad_error = HIGH; // set error flag
break; // break out of infinite loop break; // break out of infinite loop
} }
} }
go_z(TP_DATA); // Release the Data line so it goes high as the stop bit go_pu(TP_DATA); // Release the Data line so it goes high as the stop bit
delayMicroseconds(80); // testing shows delay at least 40us delayMicroseconds(80); // testing shows delay at least 40us
while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low
if (watchdog >= timeout) { //check for infinite loop if (watchdog >= timeout) { //check for infinite loop
touchpad_error = HIGH; // set error flag
break; // break out of infinite loop break; // break out of infinite loop
} }
} }
delayMicroseconds(1); // wait to let the data settle delayMicroseconds(1); // wait to let the data settle
if (digitalRead(TP_DATA)) { // Ack bit s/b low if good transfer if (digitalRead(TP_DATA)) { // Ack bit s/b low if good transfer
touchpad_error = HIGH; //bad ack bit so set the error flag
} }
while ((digitalRead(TP_CLK) == LOW) || (digitalRead(TP_DATA) == LOW)) { // loop if clock or data are low while ((digitalRead(TP_CLK) == LOW) || (digitalRead(TP_DATA) == LOW)) { // loop if clock or data are low
if (watchdog >= timeout) { //check for infinite loop if (watchdog >= timeout) { //check for infinite loop
touchpad_error = HIGH; // set error flag
break; // break out of infinite loop break; // break out of infinite loop
} }
} }
@ -402,22 +399,20 @@ char tp_read(void)
char rcv_data = 0; // initialize to zero char rcv_data = 0; // initialize to zero
char mask = 1; // shift a 1 across the 8 bits to select where to load the data char mask = 1; // shift a 1 across the 8 bits to select where to load the data
char rcv_parity = 0; // count the ones received char rcv_parity = 0; // count the ones received
go_z(TP_CLK); // release the clock go_pu(TP_CLK); // release the clock
go_z(TP_DATA); // release the data go_pu(TP_DATA); // release the data
delayMicroseconds(5); // delay to let clock go high delayMicroseconds(5); // delay to let clock go high
while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low
if (watchdog >= timeout) { //check for infinite loop if (watchdog >= timeout) { //check for infinite loop
touchpad_error = HIGH; // set error flag
break; // break out of infinite loop break; // break out of infinite loop
} }
} }
if (digitalRead(TP_DATA)) { // Start bit s/b low from tp if (digitalRead(TP_DATA)) { // Start bit s/b low from tp
touchpad_error = HIGH; // No start bit so set the error flag // start bit not correct - put error handler here if desired
} }
delayMicroseconds(1); // delay to let the clock settle out delayMicroseconds(1); // delay to let the clock settle out
while (digitalRead(TP_CLK) == LOW) { // loop until the clock goes high while (digitalRead(TP_CLK) == LOW) { // loop until the clock goes high
if (watchdog >= timeout) { //check for infinite loop if (watchdog >= timeout) { //check for infinite loop
touchpad_error = HIGH; // set error flag
break; // break out of infinite loop break; // break out of infinite loop
} }
} }
@ -425,7 +420,6 @@ char tp_read(void)
delayMicroseconds(1); // delay to let the clock settle out delayMicroseconds(1); // delay to let the clock settle out
while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low
if (watchdog >= timeout) { //check for infinite loop if (watchdog >= timeout) { //check for infinite loop
touchpad_error = HIGH; // set error flag
break; // break out of infinite loop break; // break out of infinite loop
} }
} }
@ -437,7 +431,6 @@ char tp_read(void)
delayMicroseconds(1); // delay to let the clock settle out delayMicroseconds(1); // delay to let the clock settle out
while (digitalRead(TP_CLK) == LOW) { // loop until the clock goes high while (digitalRead(TP_CLK) == LOW) { // loop until the clock goes high
if (watchdog >= timeout) { //check for infinite loop if (watchdog >= timeout) { //check for infinite loop
touchpad_error = HIGH; // set error flag
break; // break out of infinite loop break; // break out of infinite loop
} }
} }
@ -446,7 +439,6 @@ char tp_read(void)
delayMicroseconds(1); // delay to let the clock settle out delayMicroseconds(1); // delay to let the clock settle out
while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low
if (watchdog >= timeout) { //check for infinite loop if (watchdog >= timeout) { //check for infinite loop
touchpad_error = HIGH; // set error flag
break; // break out of infinite loop break; // break out of infinite loop
} }
} }
@ -455,12 +447,11 @@ char tp_read(void)
} }
rcv_parity = rcv_parity & 1; // mask off all bits except the lsb rcv_parity = rcv_parity & 1; // mask off all bits except the lsb
if (rcv_parity == 0) { // check for bad (even) parity if (rcv_parity == 0) { // check for bad (even) parity
touchpad_error = HIGH; //bad parity so set the error flag // bad parity - pass to future error handler
} }
delayMicroseconds(1); // delay to let the clock settle out delayMicroseconds(1); // delay to let the clock settle out
while (digitalRead(TP_CLK) == LOW) { // loop until the clock goes high while (digitalRead(TP_CLK) == LOW) { // loop until the clock goes high
if (watchdog >= timeout) { //check for infinite loop if (watchdog >= timeout) { //check for infinite loop
touchpad_error = HIGH; // set error flag
break; // break out of infinite loop break; // break out of infinite loop
} }
} }
@ -468,17 +459,15 @@ char tp_read(void)
delayMicroseconds(1); // delay to let the clock settle out delayMicroseconds(1); // delay to let the clock settle out
while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low while (digitalRead(TP_CLK) == HIGH) { // loop until the clock goes low
if (watchdog >= timeout) { //check for infinite loop if (watchdog >= timeout) { //check for infinite loop
touchpad_error = HIGH; // set error flag
break; // break out of infinite loop break; // break out of infinite loop
} }
} }
if (digitalRead(TP_DATA) == LOW) { // check if stop bit is bad (low) if (digitalRead(TP_DATA) == LOW) { // check if stop bit is bad (low)
touchpad_error = HIGH; //bad stop bit so set the error flag // send bad stop bit to future error handler
} }
delayMicroseconds(1); // delay to let the clock settle out delayMicroseconds(1); // delay to let the clock settle out
while (digitalRead(TP_CLK) == LOW) { // loop until the clock goes high while (digitalRead(TP_CLK) == LOW) { // loop until the clock goes high
if (watchdog >= timeout) { //check for infinite loop if (watchdog >= timeout) { //check for infinite loop
touchpad_error = HIGH; // set error flag
break; // break out of infinite loop break; // break out of infinite loop
} }
} }
@ -490,19 +479,19 @@ char tp_read(void)
void touchpad_init() void touchpad_init()
{ {
touchpad_error = LOW; // start with no error touchpad_error = LOW; // start with no error
go_z(TP_CLK); // float the clock and data to touchpad go_pu(TP_CLK); // float the clock and data to touchpad
go_z(TP_DATA); go_pu(TP_DATA);
// Sending reset command to touchpad // Sending reset command to touchpad
tp_write(0xff); tp_write(0xff);
if (tp_read() != 0xfa) { // verify correct ack byte if (tp_read() != 0xfa) { // verify correct ack byte
touchpad_error = HIGH; touchpad_error = HIGH;
} }
delayMicroseconds(100); // give the tp time to run its self diagnostic delay(350); // wait 350ms so tp can run its self diagnostic
// verify proper response from tp // verify proper response from tp
if (tp_read() != 0xaa) { // verify basic assurance test passed if (tp_read() != 0xaa) { // verify basic assurance test passed
touchpad_error = HIGH; touchpad_error = HIGH;
} }
if (tp_read() != 0x00) { // verify correct device id if (tp_read() != 0x00) { // verify basic assurance test passed
touchpad_error = HIGH; touchpad_error = HIGH;
} }
// increase resolution from 4 counts/mm to 8 counts/mm // increase resolution from 4 counts/mm to 8 counts/mm
@ -519,23 +508,13 @@ void touchpad_init()
if (tp_read() != 0xfa) { // verify correct ack byte if (tp_read() != 0xfa) { // verify correct ack byte
touchpad_error = HIGH; touchpad_error = HIGH;
} }
if (touchpad_error == HIGH) { // check for any errors from tp
delayMicroseconds(300); // wait before trying to initialize tp one last time
tp_write(0xff); // send tp reset code
tp_read(); // read but don't look at response from tp
tp_read(); // read but don't look at response from tp
tp_read(); // read but don't look at response from tp
tp_write(0xe8); // Send resolution command
tp_read(); // read but don't look at response from tp
tp_write(0x03); // value of 03 gives 8 counts/mm resolution
tp_read(); // read but don't look at response from tp
tp_write(0xf0); // remote mode
tp_read(); // read but don't look at response from tp
delayMicroseconds(100);
}
} }
//----------------------------------Setup------------------------------------------- //----------------------------------Setup-------------------------------------------
void setup() { void setup() {
pinMode(HEARTBEAT_LED, OUTPUT);
go_1(NUM_LED); // Turn off all LEDs
go_1(CAPS_LED);
go_1(SCRL_LED);
for (int a = 0; a < cols_max; a++) { // loop thru all column pins 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 go_pu(Col_IO[a]); // set each column pin as an input with a pullup
} }
@ -543,14 +522,13 @@ void setup() {
for (int b = 0; b < rows_max; b++) { // loop thru all row pins 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 go_z(Row_IO[b]); // set each row pin as a floating output
} }
touchpad_init(); // reset touchpad, then set it's resolution and put it in remote mode touchpad_init(); // reset touchpad, set resolution and put it in remote mode. Set touchpad_error if bad response from tp
if (touchpad_error) {
touchpad_init(); // try one more time to initialize the touchpad
}
} }
// //
boolean Fn_pressed = HIGH; // Initialize Fn key to HIGH = "not pressed" 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. Caps lock is bit D1. extern volatile uint8_t keyboard_leds; // 8 bits sent from Host to Teensy that give keyboard caps, num, and scroll lock LED status.
char blink_count = 0; // Blink loop counter
boolean blinky = HIGH; // Blink LED state
// //
// declare and initialize touchpad variables // declare and initialize touchpad variables
char mstat; // touchpad status reg = Y overflow, X overflow, Y sign bit, X sign bit, Always 1, Middle Btn, Right Btn, Left Btn char mstat; // touchpad status reg = Y overflow, X overflow, Y sign bit, X sign bit, Always 1, Middle Btn, Right Btn, Left Btn
@ -632,56 +610,73 @@ void loop() {
go_z(Row_IO[x]); // De-activate Row (send it to hi-z) go_z(Row_IO[x]); // De-activate Row (send it to hi-z)
} }
// //
// **********keyboard scan complete // Turn on or off the LEDs for Num Lock, Caps Lock, and Scroll Lock based on bit 0, 1, and 2 from the keyboard_leds
// variable controlled by the USB host computer
// //
// Turn on the LED on the Teensy for Caps Lock based on bit 1 in the keyboard_leds variable controlled by the USB host computer if (keyboard_leds & 1) { // mask off all bits but D0 and test if set
// go_0(NUM_LED); // turn on the Num Lock LED
if (keyboard_leds & 1<<1) { // mask off all bits but D1 and test if set
go_1(CAPS_LED); // turn on the LED
} }
else { else {
go_0(CAPS_LED); // turn off the LED go_1(NUM_LED); // turn off the Num Lock LED
} }
// //
//
if (keyboard_leds & 1<<1) { // mask off all bits but D1 and test if set
go_0(CAPS_LED); // turn on the Caps Lock LED
}
else {
go_1(CAPS_LED); // turn off the Caps Lock LED
}
//
//
if (keyboard_leds & 1<<2) { // mask off all bits but D2 and test if set
go_0(SCRL_LED); // turn on the Scroll Lock LED
}
else {
go_1(SCRL_LED); // turn off the Scroll Lock LED
}
//
// **********Keyboard scan complete
//
// ***********Touchpad Section
//
if (touchpad_error == LOW) { // check if touchpad is present
//
// poll the touchpad for new movement data // poll the touchpad for new movement data
over_flow = 0; // assume no overflow until status is received over_flow = 0; // assume no overflow until status is received
touchpad_error = LOW; // start with no error tp_write(0xeb); // request data
tp_write(0xeb); // request data if (tp_read() != 0xfa) { // verify correct ack byte
if (tp_read() != 0xfa) { // verify correct ack byte // bad ack - pass to future error handler
touchpad_error = HIGH; }
} mstat = tp_read(); // save into status variable
mstat = tp_read(); // save into status variable mx = tp_read(); // save into x variable
mx = tp_read(); // save into x variable my = tp_read(); // save into y variable
my = tp_read(); // save into y variable if (((0x80 & mstat) == 0x80) || ((0x40 & mstat) == 0x40)) { // x or y overflow bits set?
if (((0x80 & mstat) == 0x80) || ((0x40 & mstat) == 0x40)) { // x or y overflow bits set? over_flow = 1; // set the overflow flag
over_flow = 1; // set the overflow flag }
}
// change the x data from 9 bit to 8 bit 2's complement // change the x data from 9 bit to 8 bit 2's complement
mx = mx >> 1; // convert to 7 bits of data by dividing by 2 mx = mx & 0x7f; // mask off 8th bit
mx = mx & 0x7f; // don't allow sign extension if ((0x10 & mstat) == 0x10) { // move the sign into
if ((0x10 & mstat) == 0x10) { // move the sign into mx = 0x80 | mx; // the 8th bit position
mx = 0x80 | mx; // the 8th bit position }
}
// change the y data from 9 bit to 8 bit 2's complement and then take the 2's complement // change the y data from 9 bit to 8 bit 2's complement and then take the 2's complement
// because y movement on ps/2 format is opposite of touchpad.move function // because y movement on ps/2 format is opposite of touchpad.move function
my = my >> 1; // convert to 7 bits of data by dividing by 2 my = my & 0x7f; // mask off 8th bit
my = my & 0x7f; // don't allow sign extension if ((0x20 & mstat) == 0x20) { // move the sign into
if ((0x20 & mstat) == 0x20) { // move the sign into my = 0x80 | my; // the 8th bit position
my = 0x80 | my; // the 8th bit position }
} my = (~my + 0x01); // change the sign of y data by taking the 2's complement (invert and add 1)
my = (~my + 0x01); // change the sign of y data by taking the 2's complement (invert and add 1) // zero out mx and my if over_flow is set
// zero out mx and my if over_flow or touchpad_error is set if (over_flow) {
if ((over_flow) || (touchpad_error)) { mx = 0x00; // data is garbage so zero it out
mx = 0x00; // data is garbage so zero it out my = 0x00;
my = 0x00; }
}
// send the x and y data back via usb if either one is non-zero // send the x and y data back via usb if either one is non-zero
if ((mx != 0x00) || (my != 0x00)) { if ((mx != 0x00) || (my != 0x00)) {
Mouse.move(mx,my); Mouse.move(mx,my);
} }
// //
// send the touchpad left and right button status over usb if no error // send the touchpad left and right button status over usb if no error
if (!touchpad_error) {
if ((0x01 & mstat) == 0x01) { // if left button set if ((0x01 & mstat) == 0x01) { // if left button set
left_button = 1; left_button = 1;
} }
@ -694,7 +689,7 @@ void loop() {
else { // clear right button else { // clear right button
right_button = 0; right_button = 0;
} }
// Determine if the left or right touch pad buttons have changed since last polling cycle // Determine if the left or right touchpad buttons have changed since last polling cycle
button_change = (left_button ^ old_left_button) | (right_button ^ old_right_button); 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. // Don't send button status if there's no change since last time.
if (button_change){ if (button_change){
@ -705,6 +700,17 @@ void loop() {
} }
// //
// End of touchpad routine // End of touchpad routine
//
// Blink LED on Teensy to show a heart beat
//
if (blink_count == 0x17) {
digitalWrite(HEARTBEAT_LED, blinky);
blinky = !blinky;
blink_count = 0;
}
else {
blink_count = blink_count + 1;
}
//
delay(22); // The overall keyboard scanning rate is about 30ms delay(22); // The overall keyboard scanning rate is about 30ms
} }