Matrix Orbital

Personal tools

You are here: Home » Application Notes » Javelin Stamp » Sending Text

Twitter Channel

Hello World, Matrix Orbital is joining the social networking world, we hope to connect with new and old friends and in a fun and exciting new way!, come follow us on Twitter!

Sending Text

Document Actions

Sending text to a display from a Javelin Stamp.

Before you start...
You need to either set your LCD for TTL levels or add a RS232 chip to you circuit. For setting the LCD to TTL levels, please consult the manual for your display.

Connecting the LCD to the Javelin Stamp (Hardware)...
We used bread board cable and connect the pins to pin #2, #3 and #5.

Pin #2 is connected to P0
Pin #3 is connected to P1
Pin #5 is connectod to Vss, which is ground

Code Examples

Connecting the LCD to the Javelin Stamp (Software)...

Before you can communicate with the LCD you need to create a Virtual UART Peripheral to communicate with the LCD.

// Uart.dirTransmit -> Uart will be used to transmit data only.
// CPU.pin0 -> Pin used to transmit data
// Uart.dontInvert -> data is not inverted
// Uart.speed19200 -> serial data transfer speed (baud rate)
// Uart.stop1 -> Number of stop bits used is 1

static Uart txUart = new Uart(Uart.dirTransmit, CPU.pin0, Uart.dontInvert, Uart.speed19200, Uart.stop1 );

Sending text to the screen:

Now that you have a connection to the LCD sending text is very easy. Just send each byte (character) at a time like this...

txUart.sendByte(0x43); // letter 'C' ASCII code
txUart.sendByte(0x6F); // letter 'o' ASCII code
txUart.sendByte(0x6F); // letter 'o' ASCII code
txUart.sendByte(0x6C); // letter 'l' ASCII code

OR even better send the whole string at once...

txUart.sendString("Cool"); // Send string "Cool"

Your display should display the word "Cool" after running this code.

For technical discussions and questions, please visit our forums

Created by Henry
Last modified 2005-06-06 12:24 PM