Electronic service
Skills
- Schematic capture and PCB layout
- Design and dimensioning of digital devices (complying with En60601 too).
- Microcontrollers: Microchip PIC, Hitachi H8300/ H8S, Cypress PSoC, Motorola. Atmel.
- Programmable logics devices: PLD, GAL.
- Other digital devices: Flash EPROM (AMD), EEPROM, ADC, DAC, digital potentiometers, graphical controllers SED1355, alphanumeric displays.
- Soft realtime application with Xenomai realtime Linux extensions
Success stories
Multi purpose uController (uPLC) key features:
- uP CypressMicro PsoC
- 12 VDC power supply
- 12 optically isolated digital inputs (4 interruptable)
- 8 optically isolated digital outputs
- 2 serial communication device (RS232/RS485)
- Non volatile SRAM
- Alphanumeric LCD display
- Expansion bus
Digital device for ionophoresys applications.
- uP CypressMicro PsoC
- 12 VDC power supply
- 1 voltage regulated channel and 1 current regulated channel
- Alphanumeric LCD display
- Galvanic and pulsed generator
Full featured electro stimulator and biofeedback device equipped with 4 channel + auxiliary channel, complying with En60601. Key features are:
- Digital board :
- Hitachi H8S2633 microcontroller
- 12 VDC power supply
- ADC and DAC 12 bit converter
- AMD Flash memory
- External SRAM and NVRAM (Non volatile RAM)
- Graphical 320x240 dots display (SED1355) with resistive touch screen
- Battery charge circuitry (NiCd)
- Optically isolated RS232 connection
- Expansion bus for electro stimulation channels
- Analog front-end board :
- Electro stimulation signal amplifier
- Voltage or current feedback regulation
- Overcurrent and electrode detach detection circuitry
- Electro-miographic signal conditioning and filtering
- 4 stimulation channel (120 mA, 120V) and biofeedback
- 4 auxiliar channels (for sensors acquisition)
- Digital board firmware:
- 2 stimulation waveform generation through DMA channels ( 1 MS/s max)
- Electro-miographic signal sampling and conditioning: LP, notch (50 hz) software filtering and envelope
- Protocols runtime handler
- Runtime connection to Host PC
- 320x240 graphical display handler with touch screen
- Electro-miographic sampled signal graphical view
Saccade experimental device for acoustic (37 speakers) and optical (37 LEDs) stimuli generation, according to a programmed sequence, and acquisition of signals from external sensors (4 channels @ 500 S/s)
- H8S2633 microcontroller
- 12VDC power supply
- 2 comunication devices, RS232/ RS485 (@115200 bps)
- Front-end circuitry for 37 speakers (independently selectable) and 37 LEDs (independently selectable)
- 1 MB external SRAM
Basic filesystem implementation for AMD Flash : just one folder for file storage
- Basic file commands: list, rename, delete, creation
- Basic folder commands: formatting
Set of graphical API for SED1335 and basic window system with touch screen handling
- APIs for: controller initialization, points, lines and bitmap drawing
- Basic widget: buttons, images, numeric up/down, gauges, labels. For each widget you can assign a variable (storing actual value), or event handlers (press, release etc)
- Virtual alphanumeric keyboard for touch screen
- Resizable monospace charset (8x8, 8x16, 16x16)
- Page definitions hard coded into static arrays: performs static positioning and customization of the widgets
Set of communication libraries for the following protocols
- OMRON HL
- MODBUS RTU
- ROBOX BCC
Serial communication protocol tailored to limited resources' microcontrollers. The protocol consists of a fixed length header and a variable length body: this structure make is simpler to develop onto memory constraint microcontrollers. The following commands have been implemented
- MEM8, MEM16 ( 8 and 16 memory bits) read and write
- Complex command execution: eg. files download and upload