Automated Typing demo - InterConnected DigiSpark & ATMEGA32U4 boards:- Arduino Leonardo, Bad Beetle Pro Microboards.

The Digispark can be configured as a HID Keyboard. Also ATMEGA32U4 boards:- Arduino Leonardo, Bad Beetle Pro Micro, OTG connectors and cables and a Wire to disable typing, can be used. Useful for auto testing a typing app.

Arduino Sketches:-

Keyboard_button3.ino

LeonardoAutoType.ino

Arduino Sketches:-

My AutoTyping kit. DigiSpark, ATMEGA32U4 boards:- Arduino Leonardo, Bad Beetle Pro Micro, OTG connectors and cables and a Wire to disable typing. :-

Introduction:-

This page explores a peer to peer protocol , but pragmatically a master slave protocol is simpler.

It has a USB port for the HID and three pins.

There are three pins P0, P1, P2. P1 has an LED so in an output.

We want an ASTABLE - when one end is typing, the other end backs off. Turn the LED off when Typing, if the other end has LED off, back off typing.

if one is the master and the other the slave connect P0 on the slave to P1 on the master

Explore peer to peer so

----|----|----|----|----|----|----|----|----|----|----|----|

              +---------+       
              |DigiSpark|
    +---------| P2      |==> USB HID keyboard
    | +-------| P1 LED  |
    | |  +----| P0 I/P  |  
    | |  |    +---------+   
    | |  +-- /DISABLE      P0 is used to disable typing  
    | |                    P1 is LED output  
    | |                    P2 is IDLE, /TYPING      
    | |  +-- /DISABLE   
    | |  |    +---------+       
    | |  |    |DigiSpark|
    | |  +----| P0      |
    +---------| P1 LED  |
      +-------| P2 I/P  |==> USB HID keyboard
              +---------+       

enable pullups on the inputs.
----|----|----|----|----|----|----|----|----|----|----|----|

The units type either fast or slow. When TYPING turn on the LED

Another solution

Inputs:
  P0 HALT   - stops typing - needed for reprogramming.
  P2 TYPING - hold off starting typing, type to end of sentence.
						  
Output: 
  P1 TYPING - Indicated Unit is TYPING SENTENCE.
  
	
* Type till end of the sentence
* Hold off starting until IDLE on P2 
* If interconnected, P1 output => P2 input
* Use weak pull ups on inputs. P2 HIGH when IDLE, so P1 HIGH when IDLE

P0 input  HALT - use to stop typing to reprogram
P2 input  HIGH = IDLE - default Pulled up.
P1 output LED OFF when TYPING, ON WHEN IDLE

modules
  [ holdoff logic ]  
    states: ( not typing ),( typing ), ( handover Sequence )

  [ typing engine ] - type up to GA 

  [ UC1 ]    [ UC2 ]  two micro controllers programmed as HID keyboards

Code expriments in JavaScript on this webpage.

  processUC_1(), processUC_2(), processUC_wiring() is called on a timer tick

Alternative Solution using Wired OR buss.


 
 -----+-------+---- Wired OR buss using Weak Pullup resistors
      |       |
   [ UC1 ] [ UC2 ]  two micro controllers programmed as HID keyboards
      
//
//  processUC_1 is instance 1 in one micro controller
//  processUC_2 is instance 2 in another micro controller
//  processUC_wiring is interconnect wiring
//
//  [ processUC_1 ] , [ processUC_wiring ] , [ processUC_2 ]
//
----|----|----|----|----|----|----|----|----|----|----|----|

              +---------+       
              |DigiSpark|
    +---------| P2 W-OR |==> USB HID keyboard
    | +-------| P1 LED  |
    |    +----| P0 I/P  |  
    |    |    +---------+   
    |    +-- /DISABLE      P0 is used to disable typing  
    |                      P1 is LED output  
    |                      P2 is IDLE, /TYPING      
    |    +-- /DISABLE   
    |    |    +---------+       
    |    |    |DigiSpark|
    |    +----| P0      |
    | +-------| P1 LED  |
    +---------| P2 W-OR |==> USB HID keyboard
              +---------+       

----|----|----|----|----|----|----|----|----|----|----|----|

P0 input  HALT - use to stop typing to reprogram
P2 Wired OR buss - Assert low while typing, Holdoff starting typing till high.
P1 output LED OFF when TYPING, ON WHEN IDLE

DigiSpark 1: Text to be typed.

ds1_P0
ds1_P2 connected to ds2_P1 else ds1_P2 = IDLE,1 else ds1_P2 = TYPING,0
HID_1:

DigiSpark 2: Text to be typed.

ds2_P0
ds2_P2 connected to ds1_P1 else ds2_P2 = IDLE,1 else ds2_P2 = TYPING,0
HID_2:

Pump the two character streams into different methods of collating to see what they look like.

comment:- Memory Leak.

this demo does not delete old text so it has a memory leak! If left to run for a long time the page gets slower and slower.

combined_app:

combined character by character

combined_words:

combined_paragraphs:

A--[ txBuffer ]----
B--[ rxBuffer ]----
===================
stream Timeline:-
===================
A--[ HI GA ]-----------------[Hello     ]-----[Hello     ]---[aaaaaaaaaaa]--------[ddddddd]--
B----------------[ HI GA ]-----[Hi]---------[hhhhhhhhhhhhh]----[bbbbbbbbbbb]---[ccccccc]----

Memory Leak

This demo does not delete old text so it is effectivly a memory leak! If left to run for a long time the page gets slower and slower

thoughts

There are two streams to be displayed together.

Options:

Display two lines:- received, transmitted.

Merge characters as they arrive.

Merge Words as they arrive.

Merge ParaGraphs as they arrive.

Add time Markers so split on.

The input needs to be display at least word by word.


Flushed
1:hsgdhsgdhs
2:khasahsksahk
---------------------			
Line1: jwhej kjwejk kjwhejkwle l
Line2: kwh  ek jknmnm ljkljj 
--------------
When Line1 or Line2 get too big flush some text out to the Flushed buffer.
Build up string consisting of a list of app + TRA interleaved.

opStr = opLogStr+

Issues:-

You could draw a timeline as characters are received.

If people are overtyping, then the bubbles split.

If the bubbles are split on GA, then the Bubbles can overlap in time.

A--[ txBuffer ]----
B--[ rxBuffer ]----

===================
stream Timeline:-
===================
A--[ HI GA ]-----------------[Hello     ]-----[Hello     ]---[aaaaaaaaaaa]--------[ddddddd]--
B----------------[ HI GA ]-----[Hi]---------[hhhhhhhhhhhhh]----[bbbbbbbbbbb]---[ccccccc]----

So do you have bubbles that are not overlapping, that overlap. If they overlap, does the text go at the start, middle, end?