stdio_serial.h

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/*
 * 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_