error: size of array 'data' is too large by using UNO

[JuFengWu]

Hello:

I use Arduino UNO and it used Atmega328, so it has 32KB ram size.

When I compile the example program, it shows

Arduino: 1.8.12 (Linux), Board: "Arduino Uno"

In file included from /home/leowu/Arduino/libraries/ros2arduino/src/uxr/client/core/type/xrce_types.h:1:0, from /home/leowu/Arduino/libraries/ros2arduino/src/ros2/xrcedds/micro_xrce_dds/lib/include/uxr/client/core/session/session.h:25, from /home/leowu/Arduino/libraries/ros2arduino/src/uxr/client/core/session/session.h:1, from /home/leowu/Arduino/libraries/ros2arduino/src/ros2/xrcedds/micro_xrce_dds/lib/include/uxr/client/client.h:24, from /home/leowu/Arduino/libraries/ros2arduino/src/uxr/client/client.h:1, from /home/leowu/Arduino/libraries/ros2arduino/src/ros2/xrcedds/micro_xrce_dds/micro_xrce_dds.h:18, from /home/leowu/Arduino/libraries/ros2arduino/src/ros2/xrcedds/xrcedds.hpp:12, from /home/leowu/Arduino/libraries/ros2arduino/src/ros2/publisher.hpp:12, from /home/leowu/Arduino/libraries/ros2arduino/src/ros2/ros2.hpp:12, from /home/leowu/Arduino/libraries/ros2arduino/src/ros2arduino.h:15, from /home/leowu/hosekilu_source_code/arduino/test_ardunio_ros2/test_ardunio_ros2.ino:1: /home/leowu/Arduino/libraries/ros2arduino/src/ros2/xrcedds/micro_xrce_dds/lib/include/uxr/client/core/type/xrce_types.h:819:55: error: size of array 'data' is too large PackedSamples data[UXR_PACKED_SAMPLES_SEQUENCE_MAX];

In file included from /home/leowu/Arduino/libraries/ros2arduino/src/ros2/publisher.hpp:12:0, from /home/leowu/Arduino/libraries/ros2arduino/src/ros2/ros2.hpp:12, from /home/leowu/Arduino/libraries/ros2arduino/src/ros2arduino.h:15, from /home/leowu/hosekilu_source_code/arduino/test_ardunio_ros2/test_ardunio_ros2.ino:1: /home/leowu/Arduino/libraries/ros2arduino/src/ros2/xrcedds/xrcedds.hpp:103:66: warning: large integer implicitly truncated to unsigned type [-Woverflow] void init(uint8_t rtps_product,unsigned int client_key=0xAABBCCDD);

In file included from /home/leowu/Arduino/libraries/ros2arduino/src/ros2arduino.h:15:0, from /home/leowu/hosekilu_source_code/arduino/test_ardunio_ros2/test_ardunio_ros2.ino:1: /home/leowu/Arduino/libraries/ros2arduino/src/ros2/ros2.hpp:27:85: warning: large integer implicitly truncated to unsigned type [-Woverflow] Node(const char* node_name = "ros2_xrcedds_participant",unsigned int client_key=0xAABBCCDD);

/home/leowu/Arduino/libraries/ros2arduino/src/ros2/ros2.hpp:32:94: warning: large integer implicitly truncated to unsigned type [-Woverflow] void recreate(const char* node_name = "ros2_xrcedds_participant",unsigned int client_key=0xAABBCCDD);

/home/leowu/hosekilu_source_code/arduino/test_ardunio_ros2/test_ardunio_ros2.ino: In constructor 'StringPub::StringPub()': /home/leowu/hosekilu_source_code/arduino/test_ardunio_ros2/test_ardunio_ros2.ino:19:32: warning: large integer implicitly truncated to unsigned type [-Woverflow] : Node("ros2arduino_pub_node")

/home/leowu/hosekilu_source_code/arduino/test_ardunio_ros2/test_ardunio_ros2.ino: In constructor 'LedSub::LedSub()': /home/leowu/hosekilu_source_code/arduino/test_ardunio_ros2/test_ardunio_ros2.ino:37:32: warning: large integer implicitly truncated to unsigned type [-Woverflow] : Node("ros2arduino_sub_node")

exit status 1 Error compiling for board Arduino Uno.

It seems the problem is UXR_PACKED_SAMPLES_SEQUENCE_MAX size too big.

Is this a issue? or I should make the ram size bigger?

[OpusK]

Hi, @JuFengWu

ros2arduino does not support UNO/Mega. Please refer to README for more detail.

[JuFengWu]

Thank you! I found UNO has 32kb RAM, but some memory is used for boot loader.