CowPi_stdio Library

• Library licensed under

• Documentation licensed under

This documentation is for the CowPi_stdio library, v0.6.

The current version is:

• Configuring stdio File Streams
  • Configuring stdin and stdout
  • Configuring a Display Module
    • Configuring a Display Module in C
    • Configuring a Display Module in C++
• Special Considerations
  • Placing Format Strings in Flash Memory
  • printf Limitations
    • Enabling Floating Point Conversions
  • ASCII Control Characters
  • Pointing Multiple File Streams to the Same Display Module
  • Enabling/Disabling Memory-Expensive Display Modules
    • Matrix Font
    • Morse Code Font
    • Timed Displays
    • Which displays are disabled
    • Passing Compiler Arguments
• Other Functions for Display Modules
  • Relatively Low-Level Functions
  • Special Functions
• MAX7219-driven Seven-Segment Display
  • Discussion
    • Scrolling vs Non-Scrolling
    • Font
    • ASCII Control Characters
    • Literal Bytes
    • Communication Protocol
    • Custom Transmission Function
  • Example
    • max7219_seven_segment
• MAX7219-driven LED Dot Matrix Display
  • Discussion
    • Configuring the Display
    • Font
    • ASCII Control Characters
    • Literal Bytes
    • Communication Protocol
    • Custom Transmission Function
  • Example
    • max7219_dotmatrix
• HD44780-driven LCD Character Display
  • Discussion
    • Configuring the Display
    • Font
    • ASCII Control Characters
    • Serial Adapters
    • Communication Protocols
    • Custom Transmission Function
  • Examples
    • hd44780_blinky
    • hd44780_lcd_character
• Morse Code on Output Pin
  • Discussion
    • Configuring the Display
    • Font
    • ASCII Control Characters
    • Communication Protocol
    • Custom Transmission Function
  • Example
    • morse_code
• Communication Protocols for Display Modules
  • Bit-Banged Implementation and Hardware-Based Implementation
  • No Protocol
  • SPI
    • Terminology
  • I²C
    • Specifying the Peripheral’s I2C Address
    • Terminology
• Theory of Operation
  • Communication Protocols
  • Display Modules
  • File Streams
    • Creating File Streams on AVR and ARM
    • Display Modules’ Cookie
    • Buffered Display Modules
    • Special Functions
• Functions for Direct Control of Display Modules
  • Functions for Direct Control of Communication Protocols
    • communication.h
  • Functions for Direct Control of MAX7219-Controlled Display Modules
    • max7219.h
  • Functions for Direct Control of HD44780-Controlled Display Modules
    • hd44780.h
  • Functions for Working with the CowPi_stdio Font Glyphs
    • font_7segment.h
    • font_dotmatrix.h
    • font_morse_code.h