ARDUINO MEGA Functions Serial Link

ARDUINO → Functions and Variables → ARDUINO MEGA Functions Serial Link

The Arduino MEGA has 4 user serial ports - 1 reversed for the system and 3 user controllable serial ports. These serial ports can be configured in code or via the Motors and Sensor Setup window. The serial ports are buffered - a 70 byte receive buffer and a 40 byte transmit buffer.

Color Key Function: Variable:

getChar

short getChar(const TUARTs nPort)

(short) Function will retrieve the next character from the buffer that was sent to port 'nPort'. Parameter Explanation Data Type nPort A sensor port or name TUARTs getChar(uartOne); // retrieve the next char from UART Port 'uartOne'

sendChar

void sendChar(const TUARTs nPort, short nChar)

(void) Function will send the next character to port 'nPort'. Parameter Explanation Data Type nPort A sensor port or name TUARTs nChar A char to send to 'nPort'. (Can be a short or a char) short sendChar(uartOne, 'B'); // send the next char from UART Port 'uartOne'

setBaudRate

void setBaudRate(const TUARTs nPort, TBaudRate nBaudRate)

(void) Function will set the Baud Rate for port 'nPort'. Acceptable Baud Rates: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 200000, 230400 and 250000. Parameter Explanation Data Type nPort A sensor port or name TUARTs nBaudRate The baud rate to use TBaudRate setBaudRate(uartOne, baudRate9600); // retrieve the next char from UART Port 'uartOne'

configureSerialPort

void configureSerialPort(const TUARTs nPort, TSerialPortMode nMode)

(void) This function will manually configure the serial port for a specific mode (system, user, Xbee, VEX LCD, etc). You can also set this same functionality using the "Motors and Sensor Setup" window. typedef enum TSerialPortMode { uartSystemCommPort = 1, // Standard ROBOTC IDE System Messaging Port uartUserControl = 2, // Fully user controlled. uartVEXLCD = 3, // VEX 2x15 LCD. Manages LCD updates in background. uartXBeeZigBee = 4, // UART used for XBee ZigBee networking uartXBeeWiFi = 5, // UART used for XBee WiFi networking uartCMUCAM = 6, // Legacy CMU Cam (Rev.1) support uartSerialGPS = 7, // Connected to a serial GPS } TSerialPortMode; Parameter Explanation Data Type nPort A sensor port or name TUARTs TSerialPortMode The type of the serial device attached to this pin. TSerialPortMode configureSerialPort(UART1, uartUserControl); //Configures UART1 as a User Control Serial Port

bXmitComplete

bool bXmitComplete(const TUARTs nPort)

(bool) Function will return if the transmit (Xmit) buffer is empty. Parameter Explanation Data Type nPort A sensor port or name TUARTs sendChar(UART1, 'H'); //Send a character if(!bXmitComplete(UART0)) //Wait until character has been transmitted wait1Msec(1);