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Hi
I want to display a variable on a topic. Therefore I need to transform my variable from an volatile unsigned long to an std_msgs type (for example UInt64). This gives following error:
no match for 'operator=' (operand types are 'std_msgs::UInt64' and 'volatile long unsigned int')
How can i convert this long to a std_msgs?
Thanks
Your code probably looks like :
std_msgs::UInt64 int_a;
volatile long unsigned int_b;
int_a = int_b;
But if you look at the message definition you'll see that there is a field data, so you have to use it to set the message value :
std_msgs::UInt64 int_a;
volatile long unsigned int int_b;
int_a.data = int_b;
Check the definition of std_msgs::UInt64.
You are trying to write the value to the message, which is of type std_msgs::UInt64 and contains a field data of type uint64.
Thus, correct would be
std_msgs::UInt64 your_msg;
your_msg.data = your_volatile_unsigned_int;
Asked: 2018-12-11 02:41:46 -0500
Seen: 751 times
Last updated: Dec 11 '18
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