====== 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 * See https://www.ebay.com/itm/XL4015-5A-Step-Down-Buck-Converter-Module-DC-DC-Power-Supply-LED-Lithium-Charger/263587316867?hash=item3d5f074483:g:4SQAAOSw2hhcgHTnItem * XL4015. PWM for voltage control. Cycle stealing for current control. * Use digital pots to set voltage/current. https://demandperipherals.com/cards/qpot.html * Use AVR to set H-bridge direction and monitor voltage/current * Low cost NFETs for H-bridge can have high gate capacitance * Design to work with 7474 DPI circuit or direct SPI * No new Verilog * This might be a big seller 9-axis IMU card * BNO055 based so we do not do Kalman filters * We could buy/mount https://www.adafruit.com/product/4646 if needed 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 * PN532 based * Similar to https://www.adafruit.com/product/364 * "half size" card. 98x48mm 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 * http://www.farnell.com/datasheets/3119148.pdf * https://nl.farnell.com/trinamic/tmc2226-bob/breakout-board-stepper-motor-driver/dp/3439212?st=tmc2226 * API to be defined * Most likely based on low speed serial peripheral 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