Itellisense errors but build succeeds

PlatformIO IDE
1

I need some help so my project is on a atmega32u4 im utilising the avr/sleep library intellisense gives me these errors (the same is true for the PN532 stuff) the thing i dont understand is it builds and runs exactly as expected.

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A snippet of my code is here:

#include <avr/interrupt.h>
  #include <avr/sleep.h>

  // This is the code that runs when the interrupt button is pressed and interrupts are enabled.
  void wakeUpNow() {}

  // Lets go to sleep.
  void sleepNow() {
    sleep_enable(); // Enables the sleep mode.
    attachInterrupt(0,wakeUpNow, HIGH);
    set_sleep_mode(SLEEP_MODE_PWR_DOWN); // Sleep mode is set here.

Platformio.ini contains

[env:sparkfun_promicro8]
platform = atmelavr
board = sparkfun_promicro8
framework = arduino
lib_deps = 
	wire
	featherfly/SoftwareSerial@^1.0
	dfrobot/DFRobotDFPlayerMini@^1.0.5
	miguelbalboa/MFRC522@^1.4.8
	ivanseidel/LinkedList@0.0.0-alpha+sha.dac3874d28
	https://github.com/clarketronics/PN532.git
	rocketscream/Low-Power@^1.6
monitor_port = COM12
monitor_speed = 115200

Please help!

2

Ctrl+Shift+P → Rebuild IntelliSense.

3

So that works for about 3minutes then it pops back up.

4

Well did you add a new library within those 3 minutes or change the project? Do you have other VSCode extensions installed besides C/C++ by Microsoft, PlatformIO, Python and Jupyter?

5

No, i waited the time. i actually walked away and came back.

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6

The C++ Intellisense extension by austin is known to be make problems with PlatformIO, reported multiple times in this forum. The Microsoft one is all you need.

7

Ok, so ive removed that. Restarted vscode and rebuilt intellisense. The errors are still there.

8

Does the project still build? Delete the .pio and .vscode folder if in doubt and re-build the firmware and rebuild the intellisense.

9

ahhhh, looking through the c_cpp_properties.json noticed its deleted the reference i added to where the avr library’s are. I’ve added it back and it works now but why would it have deleted it in the first place?

10

The c_cpp_properties.json is a automatically generated file. It will be regenerated on every IntelliSense rebuild, which may be triggered as a post-action on a build, platformio.ini modification or an explicit rebuild command. You should not be editing this file. At best, you should use build_flags with -I <path to include folder> to add an include path, this will propagate into the c_cpp_properties.json after a rebuild.

What libraries are missing in the include path and where are they on your computer?

11

ok so i added this to the platformio.ini

build_flags = 
	-I "C:/Users/Rhys/.platformio/packages/toolchain-atmelavr/avr/include/avr"

Rebuilt intelisense and still got the warnings.