Serial1 on Mega not working (Arduino 0021)

Forum 2005-2010 (read only) Software Bugs & Suggestions
1

I am trying to get the Serial1 object to work. I have connected a serial OLED display to my Mega. All is working perfectly. That stops when I try to connect the display to Serial1.

I have used Serial1 on the past (Arduino 0018) then it was working. An yes, I have selected the Mega board in the IDE.

Any ideas would be appreciated.

2

What operating system are you on? Can you be more specific about what you change and what difference in behavior you see? Can you post a simplified but complete sketch that demonstrates the same problem?

3

I will try to be more specific. I am using OSX 10.5.8 (Intel Mac Pro).

The following code is a summary of what I am doing:

#include <HardwareSerial.h>

HardwareSerial *HardwareSerialObj;

void setup(void){
  HardwareSerialObj = &Serial1;
  HardwareSerialObj->begin(9600);
}

void loop(void){
 HardwareSerialObj->println("Hello world"); 
}

HardwareSerialObj can have value Serial of Serial1. My 4D OLED driver is doing the same. That way I can provide the UART to use as a parameter.

My OLED is working perfectly when I use the Serial object. Serial1 doesn't work. I see that some objects are drawn on the OLED but some are not. To me it looks like that the Serial1 connect is unstable and loosing data?