usart.h File Reference

library for USART communication (API) More...

Go to the source code of this file.

Macros
#define	USART_BUFFER   128

Functions
void	usart_setup (void)
	setup USART peripheral
void	usart_putchar_blocking (char c)
	send character over USART (blocking) More...
void	usart_flush (void)
	ensure all data has been transmitted (blocking) More...
char	usart_getchar (void)
	get character received over USART (blocking) More...
void	usart_putchar_nonblocking (char c)
	send character over USART (non-blocking) More...

Variables
volatile uint8_t	usart_received

Detailed Description

library for USART communication (API)

Author

King Kévin kingk.nosp@m.evin.nosp@m.@cuvo.nosp@m.odoo.nosp@m..info

Date

2016

Note

peripherals used: USART USART peripheral used for UART communication

Definition in file usart.h.

Macro Definition Documentation

#define USART_BUFFER   128

transmit and receive buffer sizes

Definition at line 24 of file usart.h.

Function Documentation

void usart_flush

(

void

)

ensure all data has been transmitted (blocking)

Note

block until all data has been transmitted

Definition at line 95 of file usart.c.

char usart_getchar

(

void

)

get character received over USART (blocking)

Returns

character received over USART

Note

blocks until character is received over USART when received buffer is empty

Definition at line 103 of file usart.c.

void usart_putchar_blocking

(

char

c

)

send character over USART (blocking)

Parameters

[in]

c

character to send

Note

blocks until character transmission started

Definition at line 89 of file usart.c.

void usart_putchar_nonblocking

(

char

c

)

send character over USART (non-blocking)

Parameters

[in]

c

character to send

Note

blocks if transmit buffer is full, else puts in buffer and returns

Definition at line 117 of file usart.c.

Variable Documentation

volatile uint8_t usart_received

how many bytes available in the received buffer since last read

Definition at line 58 of file usart.c.