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Comment: Re: no price? (Score 1) 88

by ajlitt (#47797561) Attached to: MIPS Tempts Hackers With Raspbery Pi-like Dev Board

Outside of the 1gb RAM, dual core, and dedicated bus, BeagleBone Black is your board. Unfortunately the new revision have more eMMC and not more RAM for the money.

As for the bus, the manufacturer has to decide between bringing everything out on high density connectors that are useless for hobbyists, or be selective and use common .1" pitch box headers. BB/BBB, Arduino, and RasPi all owe some of their popularity to that accessibility. The BBB has some limitations imposed by the peripheral choice, though eMMC and HDMI can be disabled to get access to the full 16 bit GPMC bus. I've used this on a project before and had a NAND cape and FPGA hanging off it with a bunch of pins left over for peripherals.

What we would both probably like is a BeagleBone like board with the Freescale I.MX6 quad, like the Udoo without the Arduino or a cost reduced Novena.

Comment: Re:I don't even, what are they, what? (Score 2) 103

by ajlitt (#44255317) Attached to: Microsoft Reveals Its 3D Printing Strategy For Windows 8.1

Now that I think about it, that's true, there is no hardware flow control for RepRap firmware. Sorry, forgot about that. Every command is responded to with "ok" if it's been accepted into the buffer. If there's no room, the "ok" is delayed until the buffer has space. So maybe "copy file com1:" might not work well, but a very simple expect script could do the job.

Comment: Re:I don't even, what are they, what? (Score 1) 103

by ajlitt (#44255053) Attached to: Microsoft Reveals Its 3D Printing Strategy For Windows 8.1

Some firmware lets you use the nonstandard 250000 baud rate. On Linux, 250000 is supported by newer kernels but requires some libraries be updated (pyserial for Pronterface and Octoprint). The reason that's chosen is because it divides down with no clock error to the CPU clocks used on some of the AVRs used for RepRaps.

This isn't a problem if you use 115200.

Is that what you were thinking of?

Comment: Re:Something missing (Score 1) 103

by ajlitt (#44253487) Attached to: Microsoft Reveals Its 3D Printing Strategy For Windows 8.1

You can throw any bitmap at any color laser printer, and it should print it.

Take any 3D model and send it to a 3D printer and you'll likely get a blob of goo if the toolchain doesn't choke on the model first.

Mapping a 2D image to a 2D surface is easy. Taking an arbitrary mesh and turning it into instructions to manufacture a mechanically sound object is hard.

"What is wanted is not the will to believe, but the will to find out, which is the exact opposite." -- Bertrand Russell, _Sceptical_Essays_, 1928

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