Print.h File Reference

Arduino-compatible Print base class (independent implementation). More...

#include "STM32_Arduino_Compat.h"
#include "WString.h"

Go to the source code of this file.

Classes
class	Print
	Arduino-compatible text output base class. A subclass provides write(uint8_t); everything else is built on it. More...

Macros
#define	DEC   10
	Number base for print(): decimal.
#define	HEX   16
	Number base for print(): hexadecimal.
#define	OCT   8
	Number base for print(): octal.
#define	BIN   2
	Number base for print(): binary.

Detailed Description

Arduino-compatible Print base class (independent implementation).

Adafruit_GFX derives from Print so a display can be used like a serial port: tft.print("x="); tft.println(42);. Only write(uint8_t) is pure virtual; every print()/println() overload funnels into it.

Floating point is formatted by this class itself (printFloat), not with printf: newlib-nano, the default in CubeIDE, cannot print floats via printf unless "-u _printf_float" is added to the linker flags.

Warning

Not thread-safe or ISR-safe. print()/println() are sequences of separate write() calls; a task switch between two of them lets a second caller's characters interleave into the same display. Serialise access to one display object (a mutex, or one owner task). Do not call from an ISR: drawing over SPI blocks.

Definition in file Print.h.

Macro Definition Documentation

BIN

#define BIN   2

Number base for print(): binary.

Definition at line 32 of file Print.h.

DEC

#define DEC   10

Number base for print(): decimal.

Definition at line 26 of file Print.h.

HEX

#define HEX   16

Number base for print(): hexadecimal.

Definition at line 28 of file Print.h.

OCT

#define OCT   8

Number base for print(): octal.

Definition at line 30 of file Print.h.