Showing posts with label Embedded. Show all posts
Showing posts with label Embedded. Show all posts

Tuesday, May 03, 2016

Protect your Design or IP

If you have made an electronic product with a new circuit or code and need to protect it, then these are some Methods. If your Intellectual Property is an Idea, A Hardware Innovation or Software Application; It may need some protection other than patents. Sometimes patents are used for general applications and generic designs. Patent only an Original Idea or Innovation or an Exclusive and Unique Method.

Microcomputer Circuits in Process Control.

Protect your Design or IP

If you are small and the innovation very big, tie up with established companies with reputed brands. If you are a source for a certain product component or module, make certain restriction on patenting products made from it. Else, your Module or Application Sales may be jammed by Panic Patents.

That is the reason, the Platform that fosters innovation is Open Source.

1. Security Bit -

Use for digital logic area, an atmel uC with security bit protection or any uC-uP with internal memory read protected with security bit. the firmware should be kept in tight control from both external people and your employees and must be on a non-networked and non-internet machine.

2. Hermetically seal -

This is a crude and ancient way, delete the chip part numbers and pot it in a plastic can with ciba araldite epoxy with alumina filler, this way product may not be copied and it will be immune to vibration and corrosive environment. but heat dissipation and serviceability is affected, so make a epoxy potted module of only some part of the circuit.

3. Make ASIC or FPGA -

ASIC is only for volume production and is copy protected, if you design in-house and the chip maker you order is trustworthy, then this is ok, for small volume production use FPGA, CPLD, DSP uC or uP with read protection as practical.

Embedded Systems - More about uC based designs are here.

4. Go open source -

Design a circuit and put it on the internet to share, let the community use it and improve it, here also revenue is made by service of product, custom design and customer support and this will work long term free of tensions. This way has proved to foster greater innovation and stable technologies.

(my dairy log 2002, Amps-n-Volts June 2005, Now logged here - delabs)

Monday, May 02, 2016

Embedded Linux Devices and Gadgets

Embedded Linux is not only Open Source, but can be adapted to any type of dedicated embedded system. It is more like a configurable firmware for Embedded Equipment. Its ability to manage multiple tasks efficiently makes it more friendly and stable, compared to any other OS.

When you look at the History of Operating Systems, you will see that that an OS that meant serious business was UNIX. It was the anvil for the creation of the C Language and AWK. Now we have Linux, the evolved Unix like OS, which is comfortable and versatile for Networking and Clustering.

Related Reading
Here is a Embedded Linux Wiki for the embedded product design community.

Gadgets and Appliances are become increasingly complex. More memory and CPU power for small devices are commonplace. Linux is one OS that can be muntzed to the smallest size. This helps developers make something like a super-firmware. Just what you need for that device, can be the OS.

Touchscreens for Home Appliances, wireless networking and web enabled consumer electronics make Linux an excellent escalation from "Firmware". For tiny systems a firmware is the OS. For complex devices today, Linux is user configured firmware.

Leopardboard DM355

Leopardboard DM355
  • High-performance Digital Media System on Chip 
  • ARM926EJ-S core 
  • Video Processing Subsystem (VPSS) 
DM355 combines high performance MPEG4 HD (720p) codecs and JPEG codecs up to 50M pixels per second, high quality, and low power consumption at a very low price point.

Sunday, June 21, 2015

MCS48 Code for 80C39 Microcontroller

80C39 is a Cmos Version of 8048 the one that preceded 8031-8051. MCS48 is the set for that, MCS51 is the current set.

Here is an example project for 80C39-8748-8749 microcontroller. This code was written by me, and it works. But the documentation is not complete or may have errors.

80C39-8749 MCS-48 Examples and code.

Process Controller code here 80C39 Code for MCS48 (editable spreadsheet online) or use
The circuit for these are on this page along with other circuits.

This may be difficult to put together now. But the code and hardware is near compatible to 8051 uC. Now there are may types of ADC and uC.

The circuit of the Analog Front End was a V-F Converter

Analog Front End was a V-F Converter

This was supposed to have Analog in and Analog out. Some parts of the circuit may be in the 80C51 page. This has ramp-up and ramp-down settings for the Increment and Decrement buttons. This helps setting setpoint quickly. There is also debouncing for the pushbutton.

Saturday, May 09, 2015

Embedded Microcontroller - delabs

Analog devices like transistors and diodes lead to opamps and analog computing. This takes more parts but with fast devices can be real time. Then came Logic and Digital Circuits, here also big systems will take too many parts. A very Old hp Logic Analyzer instrument, could be HP1607A, had more than five large PCBs, Toggle Switches and numerous 74Fxx TTL Chips. I tried to revive it, it could not be fully restored.

Embedded Microcontroller - delabs

Then came the solution the Microprocessor. Here the entire system goes into the firmware and a Hardware Tool Set in the Microprocessor made up of Logic and Math is sequentially used to perform the same operation that would require innumerable Gates in a plain hardware digital circuit. But as it performs the operations one after another, it takes time and is defined by the CPU Clock Speed.

Embedded Microcontroller - delabs

When the External RAM and EPROM and other peripheral devices moved into the main package, MicroController were born. When more external devices merged with the MicroController. It formed a nearly complete computer, this is known as the SOC.