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Registered Member #1131
Joined: Mon Nov 19 2007, 01:36PM
Location: Germany
Posts: 9
I'm working on a new DRSSTC with the Psoc5 based UD3 driver. Perhaps we can use this thread to collect the progress and to collect new ideas.
My progres so far: - Small changes to the PCB for cost reduction - Support for USB (USB-Serial and USB-MIDI) - New autotuning function - Added maximum primary current to telemetry - command line for control and configuration with help text, autocomplete and history function
Todo: - integrate my polyphonic MIDI interrupter project to the UD3 - autotuning for secondary coil - code cleanup
Registered Member #30656
Joined: Tue Jul 30 2013, 02:40AM
Location: UK
Posts: 208
It is good to see new work being done on DRSSTC drivers - I am also planning on making my own (am currently doing development on a FPGA plus modded UD2.5).
With the UD3 it is difficult though as the design does not seem to be public. Has Steve etc given you design info privately?
Registered Member #1131
Joined: Mon Nov 19 2007, 01:36PM
Location: Germany
Posts: 9
@Hydron Yes i wrote him a E-Mail
I made a huge code rewrite. Now runs FreeRTOS on the Psoc. Everything runs in separate Tasks: -UART Communication Task -USB Communication Task -UART Command line Task -USB Command line Task -Analog Task -Status Overlay Task -Fail Task -MIDI Task
The MIDI Synth is running in Software (DDS) which has full control over every pulse. It can handle up to 8 simultaneous notes. The pulses that are generated are fed into a FIFO buffer. A timer loads a new pulse if the old pulse is finished. With this FIFO only one pulse can play in one timeslot.
I extended the autotune function. With a small hack I added a CT for the Secondary and I used Braille characters to display a chart on the console.
Primary without secondary
Secondary
The firmware on the UD3 is updatable over the fiber link and I build a small PC interface. The PC interface connects via USB and enumerates as Serial port for the console and a MIDI Device. It packs the serial communication and the MIDI-Messages in a 1 Mbit stream over the fiber link to the UD3.
Registered Member #1131
Joined: Mon Nov 19 2007, 01:36PM
Location: Germany
Posts: 9
The autotuning sweeps the given frequency range and measures the current in the primary and in the secondary. After a full cycle the function search for the peak and displays it.
The phase lead is Steves work and works with timers and DMA.
I finished a bigger bridge with 200A Semikron IGBTs
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UD3 development
