systech gmbh, instruction-set d1g - instruction-set examples to demonstrate the application based on...

SYSTECH GmbH, Instruction-Set

D1g - Instruction-SetExamples to Demonstrate the Application

Based on Actual MKVision-Instructions

Dipl.-Ing. Herbert Nabereit SYSTECH GmbH


Open Issues

1. What should groups do?

2. Should groups change with the MASTER/User-Interface

3. Do we need a special voting-group?

4. Can we use the instruction-span from 0 to 254(5)?(Why not?)

5. Should we introduce parity?

6. Should we repeat a command-sequence if a necessary response failed return (Voting)?How often, which ones?

7. What cabeling-system should be used (USB?)?

8. Time constraints with the transmission?


Video- + Mouse-Keyboard-Switiching


Video- + Mouse-Keyboard-Switiching + Audio


Network with all units


Instruction-Format RS-232

1.Byte Address2.Byte Instruction/ Payload

•Easy to decode instructions-set

•Fixed command-structure

•Timeout can count on fixed length

•Fixed timeout after command-sequence avoids confusing addresses and instructions

<=200us>=400us

Delay between two bytes should allow for easy decoding and detection of a response to the command-sequence!

Next Address

Instruction or Response


SYSTECH-Instruction-Set

•Easy to Decode and execute on single-chip-microprocessors•Fixed Length Instructions•Supports up to 5 Master-Units•Supports multiple Beamers•Supports Network-Coupling•Easy Instruction Generation•Proven Operation at 1200 bit/s


Room-Image-Master

DBP Nr.19615705.6-35

0F A8 (STUTX)04 A6 (STURX)


What Teachers do..

1. Blank the screen and block mouse and keyboard

2. Broadcast a picture

3. Look into the students screen

4. Use the Beamer

5. ....

One touch operations...


User-Interaction Philosophy

The instruction-set should accommodate the needs of all three systems: Datainnovation, Datim and Systech!Datainnovation and Systech use uP-based systems, Datim uses a PC.The user-interaction philosophy differs mainly between DataInnovation and Systech. The Systech-System havily depends on the graphic location of the keys and allows for a one-touch action for most of the functions. Instructions are generated immediately. So the Instruction-Set does not depend on an end-of-sequence-key!The instruction-set assumes, that no knowledge of the structure of the network is necessary. It uses two types of instructions: General Instructions: All units will react to. Individual Instructions: To which only one Unit will react.


Individual Instructions affect only one unit at a time (1)

Teacher looks into student15‘s screen:

0F A8 (STUTX)04 A6 (STURX)On our user-interface this is a one-touch function as long as the teacher has been selected as source or as sink. In the last case only STUTX has to be sent.

15

04



Teacher transmitts his picture to the students screen:

0F A6 (STURX)04 A8 (STUTX)

15

04



Teacher transmitts his picture to a group of students:

04 A8 (STUTX) 0E A6 (STURX) 0F A6 (STURX) 10 A6 (STURX)

Let the students do their work again:0E A7 (STULOC) 0F A7 (STULOC) 10 A7 (STULOC)

15

04

1614


General-Instructionsaffect all active units

Disabled group: Not affected

Teacher- and beamer-unit are handled differently

Set-up:04 A6 STUTX00 A2 ALLON

Cancel:00 A1 ALLWORK

Teacher may remain on the network.


Audio-Connection Teacher- Student16(1)

Setup 2-way-communication between teacher and student1610 A6 (STURX) 04 A8 (STUTX) 04 AF (AUDSRC)10 B0 (AUDSINK)00 AA (AUD2CON)Let teacher talk to them all:00 AC (AUDBROA)

15

04

1614


Audio-Connection Teacher- Student16 (2)

Stop all audiofunctions, retain videoconnection:

00 AE (AUDOFF)

Reset:00 D5 (RESET)

15

04

1614


Remote-Control Teacher- Student16

Remote control of Student16Student16 transmitts 0F A8 (STUTX)04 A6 (STURX)

Take over Keyboard04 B5 (STUTXMK)0F B4 (STURXMK)

Control of all STU‘s 00 B1 (REMALL)

END: 00 B2 (REMAOF)

15

04

1614


Example Multimaster

00 DF .. 00 DF .. 00 DF7F F2 (ROK)00 DF stop‘s, after 700ms:00 E1 .. 00 E1 .. 00 E1

1

3

Room-Image-Master 1

Room-Image-Master 3


Voting

Voting

00 C9 (VOTMOD1)00 C6 (VOTSTRT)... Let them vote...00 C7 (VOTSTOP)0F D1 (STGETB1)0F D2 (STGETB2)...01 D1 01 D2...00 C8 (VOTCLR)


Picture to all

04 A8 (STUTX)00 A2 (ALLON)Stop this:00 A3 (ALLOF)or00 D5 (RESET)04


Student transmitts picture to 2 other students

06 A8 (STUTX)04 A6 (STURX)08 A6 (STURX)cancel:04 A7 (STULOC)06 A7 (STULOC)08 A7 (STULOC)or:00 D5 (RESET)

Teacher

6

8

4


All monitor‘s except teachers one are dark

00 A0 (ALLDARK)Work again:00 A1 (ALLWORK)or:00 D5 (RESET)


Switchover-Sequence1. Master 1 transmitt the mastercode GENERAL

MASTER1 every 200ms and with this prohibits the automatic activation of Master 3

2. Master 3 responds to GENERAL MASTER1 with MASTER ROK.

3. Master 1 stops transmitting

4. Master 3 takes over control of the whole network

5. Master 3 sends GENERAL MASTER3


Example Coupled Networks

Medical University of Kiel/GermanySupervisor‘s

Room

Hub

Master 1

Master 2

Master 3


Couple-Sequence1. Master 1 and Master 3 transmitt the mastercode

GENERAL MASTER1 and GENERAL MASTER 3 every 200ms in their networks. Master 2 is not working.

2. Master 1 sends GENERAL NETJOIN

3. HUB responds to Master 3 with MASTER ROK andback to Master 1 with GENERAL DELAY(repeatedly)


5. HUB detects timeout responds to MASTER 1 withMaster ROK

6. Master 1 takes over the control of the two networks


Couple-Instructions1. 00 DF (Master1) … 00 DF (Master1)

00 E1 (Master3) … 00 E1 (Master3)

2. 00 DE (NETJOIN)

3. HUB:7F ROK7F 85 (DELAY) … 7F 85 (DELAY) … until ready


5. 7F ROK

6. 00 DF (Master1) … 00 DF (Master1)


Address-Structure

15 Adresses per Student are necassary:5 Studentaddresses, one for each master5 Beameraddresses, one for each master5 Teacheraddresses, one for each master

According to the address sent, the unit will perform as a Student‘s-, Beamer‘s or a Teachers-Unit.

Once Programmed the Master-Unit can be exchanged without reconfiguring the Master-Unit.


Hub-Properties

At the moment it is assumed, that the HUBS do not need to take any commands execpt the HUB which can couple two networks.

Usual Ehternet-HUBS do not delay the transmisson, but route the signal nearly in realtime – so we should to this too. That would make the programming of the HUBS much easier.

One other thought: The automobile-manufacturers have a Low-Speed-CAN which can cope with 40m length at 100 kbit/s without terminationresistors. They make a tree out of it. At 19,6kbit/s this should work up to 200m – and would simplify the control-routing considerably.


Open Issues

1. What should groups do?

2. Should groups change with the MASTER/User-Interface

3. Do we need a special voting-group?

4. Can we use the instruction-span from 0 to 254(5)?(Why not?)

5. Should we introduce parity?

6. Should we repeat a command-sequence if a necessary response failed return (Voting)?How often, which ones?

7. What cabeling-system should be used (USB?)?

8. Time constraints with the transmission?


SCREENS

… on the way to success.

systech gmbh, instruction-set d1g - instruction-set examples to demonstrate the application based on...

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