UD3 development
Netzpfuscher, Wed Sept 06 2017, 11:39AMI'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
Terminal:
Response of autotuning function:
Track and hold for current measurement:
PCB:
PCB:
Re: UD3 development
Hydron, Wed Sept 06 2017, 06:33PM
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?
Hydron, Wed Sept 06 2017, 06:33PM
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?
Re: UD3 development
Netzpfuscher, Fri Oct 20 2017, 08:23PM
@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.
Netzpfuscher, Fri Oct 20 2017, 08:23PM
@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.
Re: UD3 development
futurist, Sun Oct 22 2017, 01:11PM
I love the console charts :)
How do you adjust phase lead and how does the autotuning function work?
futurist, Sun Oct 22 2017, 01:11PM
I love the console charts :)
How do you adjust phase lead and how does the autotuning function work?
Re: UD3 development
Netzpfuscher, Thu Oct 26 2017, 06:39PM
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
Netzpfuscher, Thu Oct 26 2017, 06:39PM
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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