USART1Minimal.h File Reference

This file provides functions that provide a minimalist interface to USART1 available on the Arduino Mega (ATmega2560). More...

Go to the source code of this file.

Functions
void	initUSART1 (unsigned long baudRate)
	Initialize USART1 for serial receive and transmit. More...
void	transmitUSART1 (unsigned char data)
	Transmit a single byte on USART1. More...
void	transmitUSART1 (const char *data)
	Transmit a null-terminated string on USART1. More...
unsigned char	receiveUSART1 ()
	Receive a byte on USART1. More...
void	releaseUSART1 ()
	Release USART1, making pins 0 and 1 again available for non-USART use. More...

Detailed Description

This file provides functions that provide a minimalist interface to USART1 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 USART1Minimal.h in your source code and link against USART1Minimal.cpp.

For a more advanced USART1 interface, consider using either the USART1 or Serial1 interfaces. Both of these are available by including USART1.h instead of USART1Minimal.h.

Function Documentation

initUSART1()

void initUSART1

(

unsigned long

baudRate

)

Initialize USART1 for serial receive and transmit.

USART1 is tied to pins 18 (TX) and 19 (RX) on Arduino Mega (ATmega2560 pins PD3, PD2).

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).

receiveUSART1()

unsigned char receiveUSART1

(

)

Receive a byte on USART1.

You must first initialize USART1 by calling initUSART1().

This function blocks until the USART receives a byte.

Returns

the byte received.

Note

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

releaseUSART1()

void releaseUSART1

(

)

Release USART1, 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 initUSART1().

Note

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

transmitUSART1() [1/2]

void transmitUSART1

(

unsigned char

data

)

Transmit a single byte on USART1.

You must first initialize USART1 by calling initUSART1().

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).

transmitUSART1() [2/2]

void transmitUSART1

(

const char *

data

)

Transmit a null-terminated string on USART1.

You must first initialize USART1 by calling initUSART1().

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).