Standard serial I/O (stdio)

Common standard serial I/O management driver that implements a stdio serial interface on AVR and SAM devices. More...

Functions
static void	stdio_serial_init (volatile void *usart, const usart_serial_options_t *opt)
	Initializes the stdio in Serial Mode.

Variables
void(*	ptr_get )(void volatile *, char *)
	Pointer to the external low level read function.
int(*	ptr_put )(void volatile *, char)
	Pointer to the external low level write function.
volatile void *volatile	stdio_base
	Pointer to the base of the USART module instance to use for stdio.

Detailed Description

Common standard serial I/O management driver that implements a stdio serial interface on AVR and SAM devices.

Function Documentation

stdio_serial_init()

void stdio_serial_init ( volatile void * usart, const usart_serial_options_t * opt )

inlinestatic

Initializes the stdio in Serial Mode.

Parameters

usart	Base address of the USART instance.
opt	Options needed to set up RS232 communication (see usart_serial_options_t).

Definition at line 82 of file stdio_serial.h.

{
    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
}

References ptr_get, ptr_put, stdio_base, usart_serial_getchar(), usart_serial_init(), and usart_serial_putchar().

Variable Documentation

ptr_get

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

extern

Pointer to the external low level read function.

Referenced by stdio_serial_init().

ptr_put

int(* ptr_put) (void volatile *, char) ( void volatile * , char  )

extern

Pointer to the external low level write function.

Referenced by stdio_serial_init().

stdio_base

volatile void* volatile stdio_base

extern

Pointer to the base of the USART module instance to use for stdio.

Referenced by stdio_serial_init().