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DPI Project and Task List

CARDS

New FPGA card

  • 2 rows of 40 pins to give 10 peripheral slots
  • optional 1 row of 16 pins for host interface card
  • USB Serial interface with CP2102
  • easy to cut serial traces and header for raw serial
  • optional host RTS line for board reset
  • smaller 98x48mm form factor
  • SPI configuration flash.
  • SPI flash is seen as a peripheral for new code download
  • 5 Volt input, onboard 3.3 and 1.2 volt regulators
  • 40/50 MHz crystal
  • new Verilog serial host interface (first using existing FPGA card)

Dual voltage/current controlled motor controller

9-axis IMU card

Qwiic interface card

  • FPGA to Qwiic interface with multiple Qwiic connectors
  • No new Verilog.
  • Maybe Linux drivers for several popular Qwiic cards

Grove interface card

  • FPGA to Grove interface with multiple Grove connectors
  • No new Verilog.
  • Maybe Linux drivers for several popular Grove cards

Programmable power supply

  • XL4015 based design as above
  • AVR and quad digital pot to control.
  • ZXCT1107 for high side current monitor
  • No new Verilog

RFID reader card

Waveform generator card

  • Based on AD9833 or similar
  • Similar to Mikroe-3309
  • Probably no new Verilog
  • Simple Linux API

Frequency counter card

  • (prescaler, into GHz range) output so low we can count it.
  • Uses the count4 Verilog peripheral or a derivative of it

A GPS receiver card (for absolute time sync and accurate frequency generation)

  • May be based on, or just carrier card of, existing GPS/GNSS receivers, yes
  • See the current GPS interface in dpdeaemon for the existing API
  • Ref frequency generator from GPS signal, 10MHz output for test equipment (multiple driver outputs to sync many measurement devices)

Galvanic insulated Volt meter

  • (low freq) (measure volt/current in LAB situations) safe for ground loops etc
  • Optical / transformer / RF gap ?

Galvanic insulated Thermocouple interface

  • test bench equipment

A generic signal conditioning board

  • some op-amps, low pass filter
  • dip switch / jumper to configure ?

Other Thoughts about cards

  • 4-20 mA interface to somehow integrate commercial sensors into fpga/linux backend
  • I2C ground loop break (level conversion and always safe) to I2C , grove, Qwiic devices
  • One New board with some switches, a few LEDS and a LCD display, nicely done, visual and size compatible to rest of platform (a little control interface)
  • CAN BUS system integration New Chips available, (tribe of car enthousiasts will welcome this)
  • ACS71240 Integrated Current Sensor (hall sensor type, insulated measurement, high bandwidth)
  • Talking to chargers and electric cars : https://en.wikipedia.org/wiki/ISO_15118 some interface for this
  • Current controller/generator (starting at low current) upto 0.5 amp, used to power LED lighting applications (panels)
  • Sub GHz tranceiver Si4464/63/61/60 used in smart metering,
    • allows many protocols (also known to me from balloon telemetry application
    • ranging 150 km without special antenna (line of sight)
    • used in remote control and logging of factory equipment (preventive maintenance) and sensors in the field
    • thinking about making it into a AX25 mesh network

Analog CPLD card

  • SLG46826 GreenPak chip with SPI
  • May need new Verilog
  • Linux API needs definition

Weather sensor card

  • Temperature, Humidity, Pressure, Light, UV Light
  • No new Verilog if I2C sensors

Brushless DC motor controller (?)

  • Based on the ATA6843 or similar

Silent stepper motor controller with all the trimmings TMC2226

DCC Model Railroad controller

  • Based on one channel of the current H-bridge
  • New Verilog required but a fairly simple design
  • recently found out this is a tribe, “model railroad builders”
  • Have a board on my desk right now to fix LED lighting of a model

Battery management card (?)

  • Coulomb counter, voltage per cell
  • Balancing charger
  • Remote on/off
  • Multiple output connectors

SD Card Reader (?)

  • One bit SPI interface

Configurable voltage regulator card (?)

  • 3.3/3.7/5/6 volt selectable via jumper
  • could be some lm317 with resistors, jumpers or switches
  • does it need to be high power?
  • typical use case for this board?

PERIPHERALS

Serial ports

  • Quad low speed serial output
  • Quad low speed serial input
  • Dual low speed serial output with flow control
  • Dual low speed serial input with flow control
  • Dual serial input/output without flow control
  • Single low speed serial port with flow control

Microstepping stepper motor controller

  • Uses existing dual H-bridge or quad open-drain driver
  • Sine/cosine lookup table
  • Phase accumulator implementation (?)

Broadcast ultrasonic ping

  • Current ping peripheral does one of eight sensors at a time
  • New peripherals pings all sensors simultaneously.
  • 8X improvement in response time

Logic analyzer (?)

  • Use all input pins as part of a logic analyzer
  • Limited to 20 MHz sampling rate
  • Configurable trigger value, hold-off, and pre-trigger.
  • Output to GTKWave or Sigrok
projects.txt · Last modified: 2021/01/21 11:44 by edwin