jeong dearo

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10 years, 5 months ago.

Serial PC Example (PWM)

Hello.

Not running Ex.

I use u-blox c027 board.

I can't controlled brightness on LED.

Whats the Problem here?

Thank you.

[Examples] Connect to your mbed Microcontroller with a Terminal program and uses the 'u' and 'd' keys to make LED1 brighter or dimmer

#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;

        } 


 
    }


}

Do you receive the initial printf? Or another one?

posted by Erik - 02 Jul 2014

I received the initial printf. but, press 'u' or 'd' >> LED not change.

I'm sorry because short of English skill

posted by jeong dearo 04 Jul 2014

1 Answer

mohamad hafiz
8 years, 2 months ago.

u must using teraterm