PINS library - Generic IO wrapper

The “pins” library separates IO application from hardware level IO functions, so the same IO application can be run on different micro-controllers or as Linux/Windows simulation. This library is optional: Any other IO library can be used as well. Typically IO hardware accessed tough the “pins” interface are GPIO, ADC/DAC, PWM, timers, etc.

Function of the “pins” library:

• Provide an application with hardware independent access to GPIO, analogs, PWM, timers, etc.

• Connect IO to communication without minimal application code.

• Hardware configuration is written in JSON only once and converted to C code, connected to IOCOM and documented by scripts.

Key points:

• Hardware specific IO headers are not included in application (except when there is need to bypass “pins”).

General

• Using “pins” library
  • JSON configuration
  • Generating C source and header files from JSON
  • Pins library types in C
  • Pins library functions
• Implementing pins library stub for a new platform
• SPI - serial peripheral interface
  • Raspberry PI SPI pins
  • SPI devices

API Reference

• GPIO

Examples

• Pins example “jane”
  • Carol hardware
  • JSON configuration and generated C code
  • The jane application

260319, updated 19.3.2026/pekka