Chen-Hanson Ting SVFIG December 20, 2014

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Presentation transcript:

Chen-Hanson Ting SVFIG December 20, 2014 Zen of LaunchPad Chen-Hanson Ting SVFIG December 20, 2014

Summary What is Zen? LaunchPad is Zen Forth is Zen 430eForth is Zen 430eForth-IDE is Zen Morse Code Beacon

Forth is Zen Forth is the simplest programming language and the simplest computer architecture. Forth is a simple list processor. All computable problem can be solved in nested lists, which generally give the simplest solution. People did get enlightened in Forth.

LaunchPad is Zen LaunchPad is essentially the single chip microcontroller MSPG2553. Ignore the Emulation Part on LaunchPad, which is much more complicated than MSP430G2553. It just provides a transparent interface to IDE on PC which lost its USART port to USB.

MSP430G2553 is Zen MSP430G2553 is an excellent host for a Forth Virtual Machine. 16 KB of flash memory and 4 KB of RAM. Serial Communications devices including an USART needed by Forth. Many other I/O devices for wide range of applications in a 20 pin DIP package.

Thread Model Comparison I tried three different thread models to compare, and select the best model for this book Zen for LaunchPad. Subroutine Thread Model v3.3 Direct Thread Model v4.3 Indirect Thread Model v6.1

430eForth v4.3 is Zen Only 182 total commands 125 Commands are visible 83 commands in assembly 57 Commands are nameless It only takes 4134 bytes in flash memory.

430eForth v4.3 is Zen 125 commands define the simplest Forth Language for programming real applications on LaunchPad. With LaunchPad, it is ideally suitable for young students and first time Forth programmers.

430eForth-IDE is Zen A gift from Dirk Bruehl of 4E4TH.org, derived from 4E4TH-IDE. Integrative Development Environment Flash downloader Terminal emulator Text file downloader Integrated Editor, Compiler, Command Viewer, Debugger, and Turnkey services

430eForth-IDE is Zen Very small package. Include all IDE services. Assume a valid 430eForth.a43 image. Best companion for 430eForth and for LaunchPad.

LaunchPad Experiments Turn LED’s On and Off HEX 41 21 C! (Turn LED on) 0 21 C! (Turn LED off) 1 21 C! (Turn red LED on) 40 21 C! (Turn green LED on)

Tone Generator Connect 8 Ohm speaker to P2.0/GND HEX 1 2A C! ( P2.0 set as output) 1 2E C! (TA1.0 output to P2.0) 80 182 ! ( Set TA1.0 to toggle) 400 192 ! ( Set period count) 210 180 ! ( Start speaker) 0 180 ! ( Stop speaker) It can’t be any simpler!

Morse Code Beacon Originally Michael Kalus’ 4E4thMorsecode.4th Modified to use Timer_A1 to produce tones Dit’s lit up red LED. Dah’s lit up green LED.

RUN! VIEW APP! These are three buttons above the Word-List-Panel on top right corner. RUN! Execute a highlighted command VIEW Display source code of highlighted command APP! Execute a highlighted command on Reset or Power-up

Thank you. Merry Christmas and Happy New Year!