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Raspberry Pi Gets Industrial

Posted by Tue, Apr 08 2014 13:25:00 Andrew Back on

A sneak peek at the brand new Raspberry Pi Compute Module and IO Board.

Yesterday the Raspberry Pi Foundation announced a new addition to their hardware family,

the Compute Module, which is targeted at business and industrial users. Designed from the

outset to be incorporated into larger designs, this is packaged in an extremely compact SO-

DIMM form factor.

The Compute Module dispenses with ports, leaving their specification down to those who

design the mainboard into which it will be inserted. It also dispenses with an Ethernet

controller, since not every application will have a need for this. However, one thing that it

does include, aside from obviously the Broadcom SoC, is 4GB of flash storage — after all, it

wouldn't be much use if it couldn't boot.

The SO DIMM connector is great for production use, but it's clearly not the most convenient -

of hardware interfaces for bench prototyping, hence why the module launched with a

companion IO board that packs a healthy selection of connectors and 0.1” pitch breakout.

Setting up

The IO board provides HDMI and USB host ports for

hooking up a display and input devices. However,

my preferred hardware console is a trusty serial

connection, and so with the Compute Module

inserted into the SO DIMM socket on the IO board, I -

connected up a USB UART.

Power was then supplied via the Micro USB

connector labelled Power In.

Resources

The Compute Module boots in just the

same way as the Raspberry Pi Model A

or B, with the difference being that the

boot device is on-board flash storage

rather than an SD card.

Logging in and executing a few familiar

commands we see that we have a root

filesystem of 3.5GB and that the only

network interface is loopback.

I decided to connect a USB Ethernet

adapter to see if this would provide a

new network interface.

However, while the Ethernet adapter powered up

and was detected by Linux, it wasn't supported by

the kernel or a loadable module. So it looks as

though adding support for peripherals will require

copying a new kernel or modules onto the on-

board flash which should be simple enough to —

do.

Hello World

As mentioned previously the IO board provides

plenty of 0.1” breakout, and just to confirm that

the GPIO pins functioned as expected I hooked

up an LED and attempted to toggle the pin

from the bash prompt. Sure enough, upon

exporting the pin, setting its direction to output

and value to 1, the LED illuminated. No

surprises here!

Bountiful prototyping

The IO board provides access to 46 pins of

GPIO, which is a good deal more than you get

with a Raspberry Pi Model A or B. In addition to

which the 0.1” pitch headers also provide plenty

of GND, 1v8, 3v3 and 5v power pins. And just

above the two long rows of headers are jumpers

which allow you to set the logic levels for pins 0-

27 and 28 45 respectively, to either 1v8 or 3v3.-

Interestingly, the J15 Micro USB connector is

labelled “USB BOOT”. From notes in the

schematic it appears that this is used to boot the

module from a USB connected host, and once

booted access is provided to the on board flash. -

Presumably this is how you would load an O/S and applications.

The board also provides CSI and DSI ports for serial cameras and displays double the —

number in fact, with two of each.

Although the connectors used for these ports

are higher density than those used with a

Model A or B, and so at the very least new flex

cables will be required. My guess is that the

current Raspberry Pi cameras will be

supported via a new cable but that rema— ins

to be seen.

Conclusion

There is no shortage of embedded solutions for industrial applications, but how many of them

give you a moderately powerful Linux system with all that I/O and such a vibrant ecosystem,

for a price tag of around only $30 (at quantity 100) ? And for those who have already been

using or looking at using the Raspberry Pi in such applications, their prayers have been

answered.

Strategically it's an interesting move for the Raspberry Pi Foundation and easy to see how

industry adoption will lead to opportunities in both directions, not to mention providing a new

source of revenue that will enable the Foundation to do even more to promote the study of

computer science.

While the Compute Module and IO Board may be targeted at business and industrial uses, I'd

be amazed if the maker community don't incorporate them into some fantastic projects. Also

together these may now be regarded as the new “premium option” for those who like to have

as much I/O as possible. And in time I fully expect to see some exciting third party

“mainboards” which accommodate a or multiple Compute Modules and integrate — —

interesting peripherals.

— Andrew Back

Resources: Raspberry Pi Compute Module Hardware Guide

Read this article on DesignSpark

For more Raspberry Pi Resources, visit our Raspberry Pi Design Centre

Produktspecifikationer

Varumärke:	Raspberry Pi
Kategori:	Inte kategoriserad
Modell:	8268825

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