I am getting the following error when using the identifier DDRB
:
identifier "DDRB" is undefined
But, when I click “go to definition”, the IDE does shows that it can find them. The code also compiles without any problem. I was using VScode first and setting intellisense to "tag parser" did work, but it also got rid of the error checking. So, I switched over to Visual Studio, but the issue remains. In both cases I included the AVR library.
I have googled quite a bit and found some solutions, but most were outdated or did not work. What can I do to resolve this issue?
"minimal reproducible example:"
#include <avr\io.h>
int main() {
DDRB |= (1 << DD3);
}
I can reproduce same issue in VS2017, and this one can be resolved by adding the #define __AVR_ATmega32U4__
above the #include <avr\io.h>
like this:
#define __AVR_ATmega32U4__
#include <iostream>
#include <avr/io.h>
int main()
{
DDRB |= (1 << DD3);
}
After adding the macro definition, VS Intellisense option can recognize them well and the issue goes away. More details refer to Kissiel's reply . Thanks to him!
If you don't want to paste this definition into almost every file:
f1
C/C++; Edit configurations (UI)
C/C++; Edit configurations (UI)
Defines
section eg __AVR_ATmega32U4__
It worked for me in vs code.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.