Tutorial: How to use the Serial port on mbed

On this tutorial, we will show how to send messages using the serial communication. The mbed has 3 serial ports that can be configured. This can be used to communicate with other ICs or for debug purposes. Also, the board has a serial port that can be emulated via USB:

Connect the mbed to your PC. Open the compiler as in http://garagelab.com/profiles/blogs/tutorial-mbed-first-steps. Open that link and import that library to the program.

Inside the main.cpp file, paste the code:

#include "mbed.h"

Serial pc(USBTX, USBRX); // tx, rx
PwmOut led(LED1);

float brightness = 0.0;

int main() {
pc.printf("Press 'u' to turn LED1 brightness up, 'd' to turn it down\n");

while(1) {
char c = pc.getc();
if((c == 'u') && (brightness < 0.5)) {
brightness += 0.01;
led = brightness;
}
if((c == 'd') && (brightness > 0.0)) {
brightness -= 0.01;
led = brightness;
}

}
}

Open a serial terminal program, like PuTTY:

When you press u the onboard LED will get brighter, if you press d, it will fade out.

That's it! Enjoy using your board with serial communication.

References:

http://mbed.org/handbook/mbed-NXP-LPC1768

http://mbed.org/handbook/Serial

http://mbed.org/handbook/SerialPC

Views: 7567

Comment

You need to be a member of GarageLab (arduino, electronics, robotics, hacking) to add comments!

Join GarageLab (arduino, electronics, robotics, hacking)

Latest Activity

Profile IconOjasvi Gupta, Simran Singh, ebraam yousif doud and 6 more joined GarageLab (arduino, electronics, robotics, hacking)
yesterday
Richard Reubenstone left a comment for David
"Hi, David. Please see the friends invite I sent you recently. I wanted to introduce you to…"
Friday
GarageLab posted a blog post
Sep 19
Faiyaz Ahamed is now a member of GarageLab (arduino, electronics, robotics, hacking)
Sep 16
Sylvain Monette is now a member of GarageLab (arduino, electronics, robotics, hacking)
Sep 15
vivid posted blog posts
Sep 14
Profile IconAutha Rachman, Nguyễn Anh Tú and mohammad nabe joined GarageLab (arduino, electronics, robotics, hacking)
Sep 14
vivid and Richard Reubenstone are now friends
Sep 9
vivid joined Marcelo Rodrigues's group
Thumbnail

Arduino

Group for the Arduino communitySee More
Sep 9
Anatolio Filho is now a member of GarageLab (arduino, electronics, robotics, hacking)
Sep 5
Richard Reubenstone added a discussion to the group Arduino
Thumbnail

RF Controlled Robot Using Arduino

I just joined GarageLab and the Arduino group. My son, Steven, is the Founder & CEO of…See More
Aug 30
Richard Reubenstone joined Marcelo Rodrigues's group
Thumbnail

Arduino

Group for the Arduino communitySee More
Aug 30
Richard Reubenstone joined KK. sai subramanyam's group
Thumbnail

Atmel Microcontrollers

 Sharing Ideas and information about microcontrollers.See More
Aug 29
Profile IconSmith King and Richard Reubenstone joined GarageLab (arduino, electronics, robotics, hacking)
Aug 29
Profile IconJon danks and amit sulu joined GarageLab (arduino, electronics, robotics, hacking)
Aug 26
Profile IconMario, Riyadi raiku and Luu Duc joined GarageLab (arduino, electronics, robotics, hacking)
Aug 24
Profile Iconks kr, mashkoor and Mert joined GarageLab (arduino, electronics, robotics, hacking)
Aug 22
Profile IconSastri Yanamandra and Omar Stanley joined GarageLab (arduino, electronics, robotics, hacking)
Aug 17
Roosevelt Sebial is now a member of GarageLab (arduino, electronics, robotics, hacking)
Aug 16
Profile IconKristoffer Thorpe and ANKUSH ARJUN DHEKWAR joined GarageLab (arduino, electronics, robotics, hacking)
Aug 12

© 2016   Created by Marcelo Rodrigues.   Powered by

Badges  |  Report an Issue  |  Terms of Service