Mohamed Saleh

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7 years, 8 months ago.

vfprintf and printf on mbed

I was wondering what is the use of API 

void mbed_error_printf(const char* format, ...)

is it if I called printf inside mbed main function, it should direct the characters to UART peripheral which is connected to PC?

1 Answer

Vincent (pan-) Coubard
7 years, 8 months ago.

Hello Mohamed,

Yes calling this function will print the message to the stdio_uart, usually it is the UART peripheral connected to your PC.

Note that this function is not a replacement for printf, it use vsprintf to format the message in a 128 byte buffer then put every character in the serial. Unlike printf, it is not buffered and the size of the formatted messages is limited to 128 characters.