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Hi, I haven't post for a while...
Because I'm writing a -from scratch- uBASIC Interpreter for the Teensy 3.6 PRJC MCU,
It's featuring buitin SDCard, small LCD, USB Keyboard, 3 LEDs & soon 3 user buttons....
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Salut, je n'ai pas posté depuis un petit moment...
En effet je suis en train d'écrire un interpreteur BASIC pour le microcontrolleur Teensy 3.6 de chez PRJC.
Il supporte un lecteur de carte SD intégré, un petit écran LCD, un controlleur de clavier USB, 3 LEDs et bientôt 3 boutons programmables
My bread board actually looks like this :
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Ma carte de test ressemble actuellement à ça :
Here is a reference card for currently implemented functions :
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Voici la carte de référence des fonctions actuelles de mon BASIC :
ADDED support for STRING & INT arrays ADDED support for Bitmap files BackSpace [8] & Ctrl-C [3] now works from Serial term NEW [v] reset PRGM & VARS BEEP [v] duration * 50ms / 1..48 octave #2 to #5 / else frequency (49..4096) TONE [v] play a tone on speaker NOTONE [v] mute speaker PLAYT5K [v] PLAYS a T5K tune PLAYT53 [v] PLAYS a T53 tune LED [v] LED 1,1 turn on 1st led // LED 3,0 turn off 3rd RSEED [v] does nothing ... DELAY [v] wait for x milliseconds PRINT / ? [v] still have to distinguish ',' & ';' OUT [v] print a char of ascii code <x>, can be redirected to FILEIODesc CLS [v] clear current screen (LCD_BUILTIN, later : VGA ....) LOCATE [v] Set text cursor position (x,y) PSET [v] set a pixel (since git:6266540) PRESET [v] clear a pixel (since git:6266540) LINE [v] draws a line (since git:6266540) CIRCLE [v] draws a circle (since git:6266540) DRAWBMP [v] draw a bitmap from storage INPUT [v] INPUT content into a variable (NUM or STR) -> can use FILEIODesc to select stream INPUTSTR [v] INPUT content into a variable (STR) -> can use FILEIODesc to select stream REM / ' [v] make a line comment FILES [v] list storage content CAT [v] read a specific file (w/o interpret it) DELETE [v] erase a file from storage DUMPSTS [v] dump serial to SD file // DUMPSTS "<filename>" -> read until timeout WRITE [ ] WRITETEXT [ ] LIST [v] List content of PRGM memory [ need checkbreack() ] RUN [v] Run content of PRGM memory [ need checkbreack() ] LOAD [v] (does it starts by a 'NEW' statement ? // I think not // so lines could be merged) SAVE [v] Save content of PRGM memory // slow impl. .... // auto-adds '.BAS' if needed CHAIN [v] => NEW / LOAD / RUN a program FOR [ ] FOR / TO / [STEP] / NEXT IF [v] IF <bool expr> THEN ... GOTO [v] Jump directly to a line GOSUB [v] Jump to line after saving current position RETURN [v] return to current position after GOSUB END / STOP[v] STOPS execution of current program -------------------------- RND(x) [v] return int between 0 & x CHR$(x) [v] return ASCII char from x STR$(x) [v] return string representing number x ASC(x) [v] return ASCII code of 1st char of 'x' string STRLEN() [v] length of a String value LEN() [v] length of a String value LEFT$() [v] return left chars of a string RIGHT$() [v] return right chars of a string MID$() [v] return substring of a string INSTR() [v] return first occurence of a substring in a string FREE() [v] return ammount of free RAM in bytes (beware it's an int not a short) MEM() [v] return ammount of free RAM in kilobytes (cause it's a short @this time) BTN() [v] returns 0,1,2,4 => Cf pressed user btn(s) INP() [v] wait for a char from input // can use FILEIO-Desc SNS() [v] read for a char from input (0 if none) // can use FILEIO-Desc SECS() [v] seconds since MCU booted
The final aim : is to have a stick-computer w/ a bottom connector that can plugs on a "motherboard" to an own-designed bus to bring external functions such as WIFI, VGA output, ....
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Le but final est d'avoir un ordi-stick autonome mais qui puisse être branché sur une carte mère grâce à un bus "maison" vers d'autres cartes d'extension de fonctions : WIFI, affichage VGA ...
Begining the design of my main STICK board ....
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Je commence à construire la carte de mon ordi-stick principal...
2 days after : BT, Screen, buttons & USBHOST
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2 jours plus tard : le Bluetooth, l'écran, 3 boutons et l'USBHOST
1 day more ....
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1 jour de plus ...
NOW : my BASIC supports STRING & INT arrays, Bitmap Files, more STRING functions & few tweaks about LCD display...
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MAINTENANT : mon BASIC supporte les tableaux de type chaines & entiers, les fichiers Image Bitmap (N&B), encore plus de fonctions pour les STRINGs et des petits arrangements sur la vitesse d'affichage du LCD...
with a little BMP
The project carries on (beginings of mother board..)
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La suite du projet (débuts de la carte mère ..)
Et voila, I'll update this page ASAP & post the source code on GitHub,
See you soon !
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Et voila, j'essaierai de mettre cette page à jour autant/dès que possible, de plus je posterai le code source du BASIC sur GitHub,
A bientôt !