Maximite harkens back to the days of BASIC

Any self-identified geek that spent some time in the 80s will tell you how they used to type out programs into their ‘microcomputer’ with BASIC. It was a simpler time when a computer’s raison d’etre was simply being a BASIC interpreter. These days are long past us now; you can’t simply turn on a computer and have it load a BASIC prompt anymore. This is where [Geoff]‘s Maximite single board computer comes in. It’s a tiny little box that whose only purpose is to play around with BASIC.

[Geoff]‘s used a PIC32MX microcontroller with 128k of RAM for the CPU of his Maximite. Unlike an Apple ][ or TRS-80, the Maximite version of BASIC can do floating point arithmetic out of the box. To connect to the outside world, the Maximite has VGA or composite out to display the BASIC interepreter. A PS/2 keyboard port provides the input, and a USB port and SD card can be used to load and save programs from a PC.

The Maximite includes a 20-pin breakout for whatever IO you can imagine. This is duplicated on [Geoff]‘s mini Maximite that is designed to be the retro throwback of an Arduino. We though those were called BASIC stamps, but if it gets kids programming, we’ll let it slide.

Build a standalone BASIC interpreter

Here’s a photo of the circuit board for the Maximite, a BASIC interpreter that [Geoff] built. The design idea was sparked when he was exploring the possibilities of the PIC32 family of chips. [Geoff] wanted to write about the hardware for a magazine article but needed an actual product to really show it off.

The design can utilize one of two microprocessors, a PIC 32MX795F512H or 32MX695F512H. The 32-bit chip has more than enough power to emulate BASIC, and even allows for floating point calculations. It’s VGA compatible and has a jack for a standard PS/2 keyboard, which makes it a standalone device. You can store programs on an SD card, or it can be interfaced with a computer via the USB-B port that you see next to the power jack. The microprocessor is a surface mount chip, but the rest of the components are through-hole, making this an easy kit to assemble. But if you’re not afraid to etch your own 2-layered PCBs there is board artwork available in [Geoff's] download package.

[Thanks Bill]

chipKIT Sketch: Mini Polyphonic Sampling Synth

In our hands-on review of the Digilent chipKIT Uno32, we posed the question of what the lasting appeal might be for a 32-bit Arduino work-alike. We felt it needed some novel applications exploiting its special features…not just the same old Arduino sketches with MOAR BITS. After the fractal demo, we’ve hit upon something unique and fun…

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Portable SID plays chiptunes

[Markus] on the DangerousPrototypes forum came up with a great little SID player.

The SID was (is?) the awesome sound generation chip inside the Commodore 64, and along with Game Boys and NESs laid the foundation for the chiptune scene. We’re happy to finally see a small SID player that doesn’t resort to SID emulation or a relatively huge MIDIbox.

The SID player itself is a shield on a CUI32 PIC dev board. The PIC32 emulates the 6510 and 6526 CPU and CIA chips found in the Commodore 64. A small USB memory stick stores the High Voltage SID Collection and the file system is navigated with an OLED screen. [Markus] says that the player draws 370 mA, so he runs it off a small wall wart. Still, we’re wondering if it’s possible to run this off of an SD card with a SwinSID so power draw can be reduced and a fully portable SID player can be realized.

We’ve got a touch of nostalgia for chiptune and demoscene music right now, so we’re going to listen to some [Nelly Furtado] [Janne Suni] right now, but you can check out the video demo [Markus] posted after the break.
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chipKIT Uno32: first impressions and benchmarks

Following Maker Faire, we’ve had a few days to poke around with Digilent’s 32-bit Arduino-compatible chipKIT boards and compiler. We have some initial performance figures to report, along with impressions of the hardware and software.

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BAMF2011: chipKIT is Arduino to the power of 32

If you’ve been hungry for more power for your microcontroller projects, but reluctant to dump your investment in Arduino shields or the libraries and community knowledge that go with them all, Digilent has you covered. Their new chipKIT boards are built around the Microchip PIC32 MCU…a powerful 32-bit chip that until recently was left out of the cross-platform scene. A majority of code and quite a number of Arduino shields will work “out of the box” with the chipKIT, and the familiar development tools are available for all three major operating systems: Windows, Mac and Linux.

We first mentioned these a couple weeks ago, but the software was unavailable at the time. Seeing the development tools in action was quite unexpected…

[Read more...]

chipKIT Max32, an Arduino Mega upgrade with a PIC32 under the hood

For those of you who are looking to put some power behind your Arduino shields,  Digilent just released their chipKIT Max32 prototyping platform. The board  features a Pic 32 microcontroller, USB programmer and all the things you would typically expect from a development board.

The PIC32MX795F512 is a  32-bit MIPS processor core running at 80Mhz, 512KB flash memory and packs 128KB of SRAM data memory. Digilent also mentions utilizing the Pic’s built in USB 2 controller, 10/100 Ethernet and dual CAN controllers, but these will require shields specific to the chipKIT Max32. The board is also fully compatible with Arduino IDE and libraries as well as MPLAB  and the PICKit3 in-system programmer/debugger.

With a price point just below the Arduino Mega 2560 this looks like a great resource for anyone looking to upgrade their Arduino webserver, or just embarrass their Arduino Arduino shield. Maybe it’ll just spawn some interesting gameduino upgrades. It can certainly cut down on extraneous Arduino usage. Either way we’ll be on the lookout to see what this performance bump can bring to table!

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