January News


Towards the end of January, we ordered two Texas Instruments kits to explore their DSP for LED lighting, digital power supplies and the Concerto for a single chip combination of ARM and DSP.

The first half of January was dedicated to some Luminary Micro boards — four in all. The two not shown here are the Power-over-Ethernet and the LM3S8962 CAN/ Ethernet board, as we have not done anything besides switching them on.

TI Cortex 4F evaluation board

LM4F232H5QD evaluation board is based on an ARM Cortex 4F (with single precision floating point and DSP instructions).

TI CAN evaluation board

LM3S2110 CAN evaluation board that shipped with the LM3S8962 Ethernet and CAN board.

TI DSP evaluation boards

The Texas Instruments LED lighting kit and Concerto evaluation board.


Concerto

Concerto eval board and software DVD

The Texas Instruments Concerto evaluation board and software.

Experimenter’s Base

Although the Concerto board has a built-in JTAG debugger, we opted for the experimenter’s board so that we could test out ARM based boards in a similar socket without destroying a digital power supply or motor drive. The Concerto was tested with some demo code, however, it has been put to one side while we complete work on the Kinetis K60 boards.

Experimenter’s base board for DSP

Texas Instruments experimenter’s base board.

Structured Publishing

We re-installed our LaTeX tools and can at least reproduce our present files. Afraid that this has taken a back seat, but it is still a serious project.


Several 50mA LED strings

The small DSP based design on Texas Instruments RGB colour LED evaluation board provides several topologies with a user-friendly GUI for experimentation. We have looked through the code, but are rusty on the TMS28xx DSPs, so that will have to wait until the current K60 work has been completed.

LED lighting kit from TI with several screen shots

Texas Instruments LED ColorMix evaluation board.

LED Lighting

LED lighting kit from TI

Texas Instruments LED ColorMix evaluation board.

The currents are from 25 mA for the RGB to about 50 mA for the white strings. These are off a 12 V supply. We will look at the waveforms a bit later with a scope and see what we can do with the PWM outputs of a typical ARM SoC. We will also make some small prototype boards with 350 mA LEDs.

That is fairly far down the road.