USART3Minimal.h File Reference

This file provides functions that provide a minimalist interface to USART3 available on the Arduino Mega (ATmega2560). More...

Go to the source code of this file.

Functions
void	initUSART3 (unsigned long baudRate)
	Initialize USART3 for serial receive and transmit. More...
void	transmitUSART3 (unsigned char data)
	Transmit a single byte on USART3. More...
void	transmitUSART3 (const char *data)
	Transmit a null-terminated string on USART3. More...
unsigned char	receiveUSART3 ()
	Receive a byte on USART3. More...
void	releaseUSART3 ()
	Release USART3, making pins 0 and 1 again available for non-USART use. More...

Detailed Description

This file provides functions that provide a minimalist interface to USART3 available on the Arduino Mega (ATmega2560).

These functions are minimalist in the following sense:

• They only send sigle bytes or zero-terminated character strings.
• They only receive single characters.
• They do not use the USART-related interrupts.
• They determine when the USART is ready to send by polling the relevant register bit.
• They determine when the USART has received data by polling the relevant register bit.

To use these functions, include USART3Minimal.h in your source code and link against USART3Minimal.cpp.

For a more advanced USART3 interface, consider using either the USART3 or Serial3 interfaces. Both of these are available by including USART3.h instead of USART3Minimal.h.

Function Documentation

initUSART3()

void initUSART3

(

unsigned long

baudRate

)

Initialize USART3 for serial receive and transmit.

USART3 is tied to pins 14 (TX) and 15 (RX) on Arduino Mega (ATmega2560 pins PJ1, PJ0).

Communications are configured for 8 data bits, no parity, and 1 stop bit.

• baudRate the baud rate for the communications, usually one of the following values: 300, 600, 1200, 2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600, or 115200 (although other values below can be specified).

Note

This function is only available on Arduino Mega (ATmega2560).

receiveUSART3()

unsigned char receiveUSART3

(

)

Receive a byte on USART3.

You must first initialize USART3 by calling initUSART3().

This function blocks until the USART receives a byte.

Returns

the byte received.

Note

This function is only available on Arduino Mega (ATmega2560).

releaseUSART3()

void releaseUSART3

(

)

Release USART3, making pins 0 and 1 again available for non-USART use.

After calling this function, you cannot read or write to the USART unless you first call initUSART3().

Note

This function is only available on Arduino Mega (ATmega2560).

transmitUSART3() [1/2]

void transmitUSART3

(

unsigned char

data

)

Transmit a single byte on USART3.

You must first initialize USART3 by calling initUSART3().

This function blocks until the USART becomes available and the byte can be transmitted.

• data the byte to be transmitted.

Note

This function is only available on Arduino Mega (ATmega2560).

transmitUSART3() [2/2]

void transmitUSART3

(

const char *

data

)

Transmit a null-terminated string on USART3.

You must first initialize USART3 by calling initUSART3().

This function blocks until the USART becomes available and all the bytes can be transmitted.

• data the null-terminated string to be transmitted.

Note

This function is only available on Arduino Mega (ATmega2560).