stdio_serial.h

Go to the documentation of this file.

/*
 * Support and FAQ: visit <a href="https://www.microchip.com/support/">Microchip Support</a>
 */


#ifndef _STDIO_SERIAL_H_
#define _STDIO_SERIAL_H_

#include <stdio.h>
#include "compiler.h"
#ifndef SAMD20
# include "sysclk.h"
#endif
#include "serial.h"

#if (XMEGA || MEGA_RF) && defined(__GNUC__)
        extern int _write (char c, int *f);
        extern int _read (int *f);
#endif


extern volatile void *volatile stdio_base;
extern int (*ptr_put)(void volatile*, char);

extern void (*ptr_get)(void volatile*, char*);

static inline void stdio_serial_init(volatile void *usart, const usart_serial_options_t *opt)
{
        stdio_base = (void *)usart;
        ptr_put = (int (*)(void volatile*,char))&usart_serial_putchar;
        ptr_get = (void (*)(void volatile*,char*))&usart_serial_getchar;
# if (XMEGA || MEGA_RF)
        usart_serial_init((USART_t *)usart,opt);
# elif UC3
        usart_serial_init(usart,(usart_serial_options_t *)opt);
# elif SAM
        usart_serial_init((Usart *)usart,(usart_serial_options_t *)opt);
# else
#  error Unsupported chip type
# endif

# if defined(__GNUC__)
#  if (XMEGA || MEGA_RF)
        // For AVR GCC libc print redirection uses fdevopen.
        fdevopen((int (*)(char, FILE*))(_write),(int (*)(FILE*))(_read));
#  endif
#  if UC3 || SAM
        // For AVR32 and SAM GCC
        // Specify that stdout and stdin should not be buffered.
        setbuf(stdout, NULL);
        setbuf(stdin, NULL);
        // Note: Already the case in IAR's Normal DLIB default configuration
        // and AVR GCC library:
        // - printf() emits one character at a time.
        // - getchar() requests only 1 byte to exit.
#  endif
# endif
}

#endif  // _STDIO_SERIAL_H_