How can I use serial ports 2 or 3 on mega 2560? I only see documentation and notes for switching to port1.

The ports 2 and 3 for mega2560 has not been implemented - but it should be easy to do. The port specific defines are in the file DMXSerial_avr.h and more ports can be added here by adding definitions. Maybe you create a pull request for this ?

Port 0 and Port 1 work currently with your software?

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On Mon, Jan 10, 2022 at 4:29 AM, Matthias @.***> wrote:

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So I am having enabling the "DMX_USE_PORT1" feature. I would like to use the default or port 0 for serial monitoring the arduino mega 2560, and use port1 uart for the DMX receiver. When I try to setup "Serial.begin(9600) on my mega I get a bunch of errors compiling, which seem like the same port is being used for dmx rx. I have uncommented out the section in the DMXSerial_avr.h and to use_port1, and have added the line in my little program #define DMX_USE_PORT1, but I still get the following errors

HardwareSerial0.cpp.o (symbol from plugin): In function Serial': (.text+0x0): multiple definition of__vector_25' C:\Users\Jason\AppData\Local\Temp\arduino_build_806647\libraries\DMXSerial\DMXSerial.cpp.o (symbol from plugin):(.text+0x0): first defined here HardwareSerial0.cpp.o (symbol from plugin): In function Serial': (.text+0x0): multiple definition of__vector_26' C:\Users\Jason\AppData\Local\Temp\arduino_build_806647\libraries\DMXSerial\DMXSerial.cpp.o (symbol from plugin):(.text+0x0): first defined here collect2.exe: error: ld returned 1 exit status Using library DMXSerial at version 1.5.2 in folder: C:\src\libraries\DMXSerial exit status 1 Error compiling for board Arduino Mega or Mega 2560.

I just checked by the following steps:

(read documentation in https://github.com/mathertel/DmxSerial)

Open the example DmxSerialRecv.ino with Arduino IDE.
Change processor to “Arduino Mega or Mega 2560”
add Serial.begin(57600); in setup()
add Serial.println("DMXBOX_TestLED");in setup() .
Open the file DMXSerial_avr.h in the libraries / DMXSerial / src folder.
uncomment line # 33 to activate the definition #define DMX_USE_PORT1 .
Verify the Sketch – it must compile without the errors above.

Please verify that this works for you as well.

Ok I did exactly that.. followed your instructions and I got the same error.

HardwareSerial0.cpp.o (symbol from plugin): In function Serial':(.text+0x0): multiple definition of__vector_25'C:\Users\Jason\AppData\Local\Temp\arduino_build_658739\libraries\DMXSerial\DMXSerial.cpp.o (symbol from plugin):(.text+0x0): first defined hereHardwareSerial0.cpp.o (symbol from plugin): In function Serial':(.text+0x0): multiple definition of__vector_26'C:\Users\Jason\AppData\Local\Temp\arduino_build_658739\libraries\DMXSerial\DMXSerial.cpp.o (symbol from plugin):(.text+0x0): first defined herecollect2.exe: error: ld returned 1 exit statusUsing library DMXSerial at version 1.5.2 in folder: C:\homeassistant\esphome projects\homeenerymonitor-heatpump\EmonESP-master\EmonESP-master\src\libraries\DMXSerial exit status 1Error compiling for board Arduino Mega or Mega 2560.

// - - - - -// DmxSerial - A hardware supported interface to DMX.// DmxSerialRecv.ino: Sample DMX application for retrieving 3 DMX values:// address 1 (red) -> PWM Port 9// address 2 (green) -> PWM Port 6// address 3 (blue) -> PWM Port 5// // Copyright (c) 2011-2015 by Matthias Hertel, http://www.mathertel.de// This work is licensed under a BSD style license. See http://www.mathertel.de/License.aspx// // Documentation and samples are available at http://www.mathertel.de/Arduino// 25.07.2011 creation of the DmxSerial library.// 10.09.2011 fully control the serial hardware register// without using the Arduino Serial (HardwareSerial) class to avoid ISR implementation conflicts.// 01.12.2011 include file and extension changed to work with the Arduino 1.0 environment// 28.12.2011 changed to channels 1..3 (RGB) for compatibility with the DmxSerialSend sample.// 10.05.2012 added some lines to loop to show how to fall back to a default color when no data was received since some time.// - - - - -


include 
// Constants for demo program
const int RedPin =    9;  // PWM output pin for Red Light.const int GreenPin =  6;  // PWM output pin for Green Light.const int BluePin =   5;  // PWM output pin for Blue Light.
define RedDefaultLevel   100#define GreenDefaultLevel 200#define BlueDefaultLevel  255
void setup () {  DMXSerial.init(DMXReceiver);  Serial.begin(57600);  Serial.println("dmx text rx");    // set some default values  DMXSerial.write(1, 80);  DMXSerial.write(2, 0);  DMXSerial.write(3, 0);    // enable pwm outputs  pinMode(RedPin,   OUTPUT); // sets the digital pin as output  pinMode(GreenPin, OUTPUT);  pinMode(BluePin,  OUTPUT);}
void loop() {  // Calculate how long no data backet was received  unsigned long lastPacket = DMXSerial.noDataSince();    if (lastPacket < 5000) {    // read recent DMX values and set pwm levels     analogWrite(RedPin,   DMXSerial.read(1));    analogWrite(GreenPin, DMXSerial.read(2));    analogWrite(BluePin,  DMXSerial.read(3));
  } else {    // Show pure red color, when no data was received since 5 seconds or more.    analogWrite(RedPin,   RedDefaultLevel);    analogWrite(GreenPin, GreenDefaultLevel);    analogWrite(BluePin,  BlueDefaultLevel);  } // if}
// End.
and I edited the avr file as so
// For using the serial port 1 on a Arduino MEGA 2560 board, enable the following DMX_USE_PORT1 definition.#define DMX_USE_PORT1

On Thursday, January 13, 2022, 12:29:45 AM PST, Matthias Hertel ***@***.***> wrote:  
I just checked by the following steps:
(read documentation in https://github.com/mathertel/DmxSerial)

Open the example DmxSerialRecv.ino with Arduino IDE.
Change processor to “Arduino Mega or Mega 2560”
add Serial.begin(57600); in setup()
add Serial.println("DMXBOX_TestLED");in setup()

.
Open the file DMXSerial_avr.h in the libraries / DMXSerial / src folder.
uncomment line # 33 to activate the definition #define DMX_USE_PORT1

.
Verify the Sketch – it must compile without the errors above.

Please verify that this works for you as well.
—
Reply to this email directly, view it on GitHub, or unsubscribe.
Triage notifications on the go with GitHub Mobile for iOS or Android.
You are receiving this because you authored the thread.Message ID: @.***>

The #define USART0_RX_vect _VECTOR(25) is still used by the DMXSerial library so the uncomment of #define PORT1 in the file C:\homeassistant\esphome projects\homeenerymonitor-heatpump\EmonESP-master\EmonESP-master\src\libraries\DMXSerial\src\DMXSerial_avr.h is not in effect. Please check this file. The #define USART1_RX_vect _VECTOR(36) must be used to assign USARTn_RX_vect

define USARTn_RX_vect USART1_RX_vect

im confused, the define port1 is COMMENTED out.. so its not in effect. I can delete it. But I dont understand what you want me to do. On Thursday, January 13, 2022, 09:40:25 AM PST, Matthias Hertel @.***> wrote:

define USARTn_RX_vect USART1_RX_vect

Line #33 must look like this:

// For using the serial port 1 on a Arduino MEGA 2560 board, enable the following DMX_USE_PORT1 definition.
#define DMX_USE_PORT1

I did that, and I get the same error as before. jason On Thursday, January 13, 2022, 11:43:26 AM PST, Matthias Hertel @.***> wrote:

Line #33 must look like this: // For using the serial port 1 on a Arduino MEGA 2560 board, enable the following DMX_USE_PORT1 definition.

define DMX_USE_PORT1

found the right file to uncomment the PORT1 directive....

mathertel / DMXSerial

ports 2 and 3 on mega #59

include

define RedDefaultLevel 100#define GreenDefaultLevel 200#define BlueDefaultLevel 255

define USARTn_RX_vect USART1_RX_vect

define USARTn_RX_vect USART1_RX_vect

define DMX_USE_PORT1