Libvterm-ctrl is a small ANSI C static library to control terminals compatible with ANSI/ISO/VT-100 control sequences.
Its main target platforms are microcontrollers where curses implementations are often not available and/or not desirable to integrate into a project, but output to a terminal with more than basic text is useful.
libvterm-ctrl does not assume the terminal is binded to stdin/stdout, so the library must be initialized with the following function.
void vt_init (FILE *input, FILE *output);
Note that this function can be called again at any time if changing the input or output files is desired.
Afterwards, simply call any of the functions available in vterm.h to use them. Note that terminals are not guarenteed to support all available functions.
Any escape sequences not wrapped in functions by this library can be sent using the vt_send or vt_nsend functions.
Libvterm-ctrl can be compiled as a static library, or you may simply add vterm.h and vterm.c to your project. Define the LVTC_EMBEDDED flag when compiling for a microcontroller.
An example makefile and program are provided for an ATMEGA-328P and Desktop Mac/Linux (avr_test.c, avr.make and nix_test.c, makefile respectively). The avr test build environment assumes an AVR toolchain (namely avr-gcc, avr-ar, avr-objcopy, and optionally avrdude for flashing the program) is installed and available on the host machine. run.sh is provided as an example of flashing the program onto the microcontroller and using GNU Screen to receive input and output.
The example program shows binding the ATMEGA-328P UART port to stdin/stdout (in the case of the AVR example), passing stdin/stdout to libvterm-ctrl, and creating a simple command line interface that can be used to test some features of the library.
Copyright 2018-2021 Bryan Haley under the MIT License.
See LICENSE.MD for more information.
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