You copied the Doc URL to your clipboard.

_ttywrch()

Defined in rt_sys.h, this function writes a character to the console. The console might have been redirected. You can use this function as a last resort error handling routine.

Syntax

void __ttywrch(int ch);

Usage

The default implementation of this function uses semihosting.

You can redefine this function, or __raise(), even if there is no other input/output. For example, it might write an error message to a log kept in nonvolatile memory.

See also

Concepts

Developing Software for ARM Processors:

Reference

Using ARM C and C++ Libraries and Floating-Point Support: