Arduino serial port functions

I'm running the current Arduino IDE (v1.5.4) on a UDOO Quad. Most programs work fine (thanks guys), but I've noticed one strange issue: the Arduino Serial.print(x) and Serial.println(x) functions cause program execution to freeze if x is a floating point number. Integers seem to be OK.

Has anyone faced this issue before? The only reference to a similar problem that I found can be seen here: http://forum.arduino.cc/index.php?topic=174874.0.

 

Sounds like it might be a armel/armhf issue possibly.

Are you using the stock Linaro Ubunto 11.10 version 1.2 from this site, and then ran the update?

 

Hi all,
I can not even get any serial print functions to display anything. I am using:
Linux udoo 3.0.35 #1 SMP PREEMPT Thu Nov 28 13:14:24 CET 2013 armv7l armv7l armv7l GNU/Linux

What in the world to do. This problem makes the Arduino side kind of worthless. Any assistance would be appreciated.

V/r

dantavious

 

I don't think that is enough information to go on. Feel free to post a code snippet and perhaps we can spot what the issue is.

 

Hi,
Thanks for the reply. I am actually using the code from the udoo website.
http://www.udoo.org/ProjectsAndTutorial ... lioID=1394
I am not able to get any serial output. What else could the problem be.

#include <dht11.h>

dht11 DHT11;

#define DHT11PIN 13
int led_hum = 12;
int led_temp = 11;

void setup() {
// put your setup code here, to run once:
delay(5000);
Serial.begin(9600);
Serial.println("UDOO & DHT11 - TEST PROGRAM By Alessandro Paghi");
Serial.println("Humidity (%)\tTemperature (C)\tLed_Hum\t\tLed_Temp");
pinMode(led_hum,OUTPUT);
pinMode(led_temp,OUTPUT);

}

void loop() {
// put your main code here, to run repeatedly:
DHT11.read(DHT11PIN);
Serial.print(DHT11.humidity);
Serial.print("\t\t");
Serial.print(DHT11.temperature);
Serial.print("\t\t");
if(DHT11.humidity>45)
{
digitalWrite(led_hum,HIGH);
Serial.print("ON\t\t");
}
else
{
digitalWrite(led_hum,LOW);
Serial.print("OFF\t\t");
}
if(DHT11.temperature>23)
{
digitalWrite(led_temp,HIGH);
Serial.println("ON");
}
else
{
digitalWrite(led_temp,LOW);
Serial.println("OFF");
}
delay(2000);
}

 

My post from yesterday has a very small example that replicates this issue...