Cara guna printf() dalam XC8

The printf() function performs two main tasks: formatting of text, and printing this formatted text to stdout. The exact location of stdout is determined by a second function called putch(), which is called by printf() to output each character.
The printf() function performs the formatting and then calls a helper function, called putch, to send each byte of the formatted text. By default the putch() function is empty. It should be customised to suit the project at hand. By customizing the putch function you can have printf send data to any peripheral or location. The printf() function is used to print to USART, but it could define stdout to output to an LCD screen or SPI. Code to initialize the intended destination must be executed before printf() is called. [1]

Mengikut wikidot.com, kita boleh guna function printf() bagi menghantar mesej melalui UART.
Berikut adalah caranya:

1.    Masukkan header file berikut ke dalam program:

2.    Initialize UART dengan setting berikut:

Baud Rate = 9600bps

Data bit = 8

Dll

Contoh:

3.    Tambah function dibawah ini tanpa perlu prototype function.

4.    Seterusnya function printf() sudah tersedia untuk digunakan bersama dengan UART. Contoh aturcara klik disini

References

[1]	Microchip, "Wikidot.com," 17 April 2014. [Online]. Available: http://microchip.wikidot.com/faq:29. [Accessed 16 September 2015].
[2]	Microchip, "Microchip Technology Inc," 5 Aug 2012. [Online]. Available: ww1.microchip.com/downloads/en/DeviceDoc/52053B.pdf. [Accessed 19 Sep 2015].