I wrote drivers for the following devices:

Power devices ¶

• DC-motors — Both on/off cw/ccw and PWM drive.
• Stepper motors — With real-time stepping control, dynamic acceleration ramps, homing state-machine, etc.
• Peltier cells and PWM heaters

Sensors ¶

• A/D converters — Interrupt-driven, high-speed sampling and data processing
• D/A converters — Employing PWMs, multiplexing of multiple channels and other advanced techniques
• GPIO lines — Direct or multiplexed, interrupt driven, polled, etc.

• NTCs, Thermo-couples — Temperature control
• Photocells — Light intensity measurement

User interface ¶

• 7-segment BCD and british-flag alphanumerical displays
• Alphanumerical LCD displays — Like the popular Hitachi HD44xxx controller.
• B/W bitmap LCD displays — Using a homebrew library to draw text and graphics (see DevLib).
• Thermal Printers — Both serial and full printing head control.
• Keyboards — Simple and matrix scan, with debounce and complex input gestures.
• RTC Clocks — Like the Dallas DS1302 and compatibles.

Communication and Networking ¶

• Serial ports — RS232, RS485, SPI, I2C and many other custom serial lines, both interrupt-driven and software buffered.
• Ethernet — CS8900A and RTL8019 (NE2000 compatible).
• USB — With HCI drivers provided by manufacturer.

Storage ¶

• NOR flash devices — Using several programming algorithms.
• Serial EEPROMs — Like the I2C 24Cxxx chips.

A few sample drivers for the most generic devices are available in DevLib.