Path: EDN Asia >> Design Centre >> Power/Smart Energy >> A look at Linduino Power System Management
Power/Smart Energy Share print

A look at Linduino Power System Management

24 Dec 2015  | Michael Jones

Share this page with your friends

Other libraries (non-Linduino) pass a value to control PEC or configure a global variable. The Linduino approach uses C++ classes. However, the code is kept very simple so that it can be turned into pure C very quickly if the engineer is prohibited from using C++. Most embedded systems support C and C++ compilers, but if a large system is pure C, the engineer may not want to hassle with the C++ name mangling, or the effects of compiling C with a C++ compiler.

Prototyping is simply a matter of copying a sketch to a file with a new name and modifying it. Once a prototype is complete, the engineer must decide how to migrate the code to a final application.

If there is no legacy code involved, the simplest case is to rewrite the LTC_I2CBus or LTC_SMBus Layer and reuse the layers above it. If there is a lot of legacy code, it might be better to copy the prototype design and recode it. The main thing is the engineer can prototype in a simpler environment.

Hardware can also be reused. It is certainly possible to put an Atmega328 in a design and use the Linduino PSM code directly. Or with a few tweaks to the TWI/LTC_I2CBus an engineer could use one of the larger Arduino platforms. LTC ported these to the Galileo as an experiment and it took less than a day.

For slave hardware, the Linduino can be connected to any PSM demo board. However, most product designs have a connector for a DC1613 dongle, so the Linduino can be connected directly to an end design using the DC2294 Shield. This is a good way to prototype on a full design before committing resources on a new product. Algorithms can be developed for an operating system to determine how much computational power and memory space are required, and to prove it will offer a return on investment.

Tool building
Linduino is a good platform for building specialised end-use tools. By combining Linduino, a DC2294, and off-the-shelf shields, one can create stand-alone tools. For example, the tool below is a programming tool that configures the non-volatile memory of a device in a hand socket. The up/down buttons select the file, and the SELECT button programs the device.

Figure 7: Example Tool.

Educational use
A final common use for Linduino PSM is learning. If the SMBus/PMBus standards are unfamiliar, a good way to learn is to connect a Total Phase Beagle, run some sketches on a DC1962, and observe the bus using the Total Phase Datacenter software. Note there is also an alternative, where LTpowerPlay can be used with a Beagle. LTpowerPlay has the advantage that the register syntax is built into the tool, so any value in the GUI can be displayed as an SMBus/PMBus transaction.

Linduino PSM is a prototyping, tool building, and learning environment for PMBus code development. The Linduino is combined with a DC2294 for connectivity to any PSM demo board or product. There is a complete working SMBus/PMBus library along with math conversions, compatible with the Arduino coding environment.

About the author
Michael Jones is with Linear Technology.

 First Page Previous Page 1 • 2 • 3 • 4

Want to more of this to be delivered to you for FREE?

Subscribe to EDN Asia alerts and receive the latest design ideas and product news in your inbox.

Got to make sure you're not a robot. Please enter the code displayed on the right.

Time to activate your subscription - it's easy!

We have sent an activate request to your registerd e-email. Simply click on the link to activate your subscription.

We're doing this to protect your privacy and ensure you successfully receive your e-mail alerts.

Add New Comment
Visitor (To avoid code verification, simply login or register with us. It is fast and free!)
*Verify code:
Tech Impact

Regional Roundup
Control this smart glass with the blink of an eye
K-Glass 2 detects users' eye movements to point the cursor to recognise computer icons or objects in the Internet, and uses winks for commands. The researchers call this interface the "i-Mouse."

GlobalFoundries extends grants to Singapore students
ARM, Tencent Games team up to improve mobile gaming

News | Products | Design Features | Regional Roundup | Tech Impact