1. Performed by: Yair Sommer Rea Yeheskel Instructor: Idan Katz Cooperated with:Motorola הטכניון - מכון טכנולוגי לישראל הפקולטה להנדסת חשמל Technion - Israel institute of technology department of Electrical Engineering Mid semester presentation SW application for Motorola g20 cellular engine - Design 24 May 2004 1 המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory

2. Background: Abstract המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 2 - Each operation requires an Input using AT commands. - During the integration process, customers need to spend time for accessing and using the cellular engine interfaces. - g20 cellular engine supports various operations. (sms, data transmission, voice, stk, etc.) - There is a need to reduce the “ Time to market ”.

3. Abstract המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 2 Project Goal: Writing a SW API Layer, with a GUI application for the g20 cellular engine. (The SW API will be a customer reference for the way code should be written during the development of their applications.)

4. Design Guidelines המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory - Parallelism – Allow several functionalities at once (example: execute AT commands while waiting for input on the GUI). - Minimal number of threads - to optimize memory use. - Respond/alert user in case of unsolicited events - Customer Reference – Code must be very clear, short and simple. - Simple Structure of program – a few layers, each layer has a unique role.

5. General Design המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 2 The Software will be implemented in layers: - Driver Layer – Handling the Serial Port I/O. - AT Commands interpreter Layer – Executes commands using the Wrapper layer. - API Modules layer – Each module (SMS, voice, etc.) will include all functionalities required. - GUI application layer. - Wrapper Layer for the Serial I/O – interface from the Driver Layer To C language.

6. Driver Layer Wrapper Layer AT Command interpreter/listener Layer General Design המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 2 SMS API Phone API GPRS API TCP/UDP API STK API More g20 API Tests Module GUI Application Layer Diagram: Will be used as customer reference

7. General Design המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 2 Driver Layer Wrapper Layer AT Command interpreter /Listener GUI Application API Modules Layer Driver Layer - Handling the Serial Port I/O. - An existing reliable layer which include all needed serial I/O operations. - Main Operations – Open/Close, Read/Write – From/To serial port.

8. General Design המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 2 Driver Layer Wrapper Layer AT Command interpreter /Listener GUI Application API Modules Layer Wrapper Layer - Interface from the Driver Layer functions to C language. - Gives a C format to all serial I/O operations, using the driver Layer. - Will be used by the AT command interpreter layer.

9. General Design המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 2 Driver Layer Wrapper Layer AT Command interpreter /Listener GUI Application API Modules Layer AT Command interpreter/listener Layer - Each API Module, calls various AT commands. - Each AT command must be checked before being sent to the g20 (Valid input and parameters). Problem: - The situation in which each module is responsible for checking its own input is unwanted.

10. General Design המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 2 Driver Layer Wrapper Layer AT Command interpreter /Listener GUI Application API Modules Layer AT Command interpreter/listener Layer - Gets an AT command and it ’ s parameters. - Checks validity of the command and parameters. - Creates the AT command String, sends it to the g20, and receives the result. - Returns the result to the calling environment. - For each incoming result, checks if it ’ s unsolicited event, and notify the calling environment (additional return value).

11. General Design המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 2 Driver Layer Wrapper Layer AT Command interpreter /Listener GUI Application API Modules Layer AT Command interpreter/listener Layer - While no AT command is executed, checks for unsolicited events. In case of such event notify the calling environment.

12. General Design המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 2 Driver Layer Wrapper Layer AT Command interpreter /Listener GUI Application API Modules Layer AT Command interpreter/listener Layer Check parameters validity Creates the AT command string Parameters Sends the AT command and receive result code Return unsolicited event flag, and event type Return Result to calling environment

13. General Design המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 2 Driver Layer Wrapper Layer AT Command interpreter /Listener GUI Application API Modules Layer - Each type of operations (SMS, voice, stk etc.) will be implemented as a separate module. - Each module will have functions of its operations. - The functions will create the sequences of AT commands and parameters, and will send each command to the AT command interpreter layer.

14. General Design המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 2 Driver Layer Wrapper Layer AT Command interpreter /Listener GUI Application API Modules Layer - This Layer will be used as customer reference for the way code should be written. - A special tests module, will get a variant number of AT commands, execute them, and return relevant results to the calling environment.

15. General Design המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory Driver Layer Wrapper Layer AT Command interpreter /Listener GUI Application API Modules Layer 2 Create sequences of AT commands based on parameters. Operation types + parameters Sends the commands, Get Results, and returns them to the calling environment

16. General Design המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 2 Driver Layer Wrapper Layer AT Command interpreter /Listener GUI Application API Modules Layer GUI Application An easy to use GUI, which allow the user to initiate all supported operations.

17. System description המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory Multi Threading in the g20 Application SW: The SW will include 3 Threads: - GUI thread – Takes care of relevant screens in the GUI. - Main thread – Service all GUI requests, Holds Current system info., Handle unsolicited events. - I/O thread – Interacting with the g20, alerts the main thread about unsolicited events.

18. System description המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 3 GUI Thread - Takes Care of the relevant screens in the GUI. - Gets input/data from the user and pass it to the main thread. - Present relevant information (reception, status of memory, network settings, etc.) GUI Thread

19. System description המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 3 Main Thread - Holds and reflects the current status of the system. - Gets request for operation from the GUI process. - Sends relevant operations to I/O thread and gets final results (Success, Failure, relevant return values). - Gets information about unsolicited events, and handles them. Main Thread

20. GUI Thread System description המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 3 I/O Thread - Gets operations request and insert them to the operations queue (FIFO). - Each operation in the queue, consists of an AT commands sequence. - In case of unsolicited events, notifies the main thread. Main Thread Operation queue I/O Thread - The sequence of commands is sent to the g20 through the interpreter layer.

21. המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 4 Driver Layer Wrapper Layer AT Command interpreter/listener Layer SMS API Phone API GPRS API TCP/UDP API STK API More g20 API Tests Module GUI Application GUI ThreadMain Thread Operation queue I/O Thread

22. Specification המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory sms API - send & receive short messages from memory or keypad - define Unicode, ASCII, etc. 4 phone API - initiate & receive voice calls, dial from memory or keypad - call management – call waiting, conference calls, etc. Tests Module - Enable the customer to write scripts of AT commands, useful to perform quick and easy tests.

23. Progression המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 5 In progress – Define final API modules to implement. Done - Acquire knowledge for operating AT commands and getting signals through SW. Done – Define final implementation and algorithms. Done – Status Report

24. Time Table המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 5 1 Week - Find a reliable driver layer for RS232. - Final Definition of each API module. 2 Weeks- Learn Regular Expression for use in AT interpreter Layer, and additional required material. 3 Weeks - Code AT interpreter Layer. 2 Weeks - Code API Module.