Hi I have this problem …
in my encoder.h file, excerpt below I have defined an extern volatile variable for use in an ISR. The ISR is defined in a file called encoder.cpp
extern volatile uint16_t A_Counter; // Initialise this to 10253 / (360 / 261) - the position of due west - 261 for the dome when the scope is at 270.
extern long Azimuth;
in main.cpp, I want to initialise the variable, so I wrote this:
#include "encoder.h"
A_Counter = 7433; // note the variable is declared in the header file as extern. Its initial value is assigned here
when I compile the source i get this error:
Executing task: C:\Users\Paul\.platformio\penv\Scripts\pio.exe run <
Processing ATmega4809_pyupdi_upload (platform: atmelmegaavr; board: ATmega4809; framework: arduino)
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/atmelmegaavr/ATmega4809.html
PLATFORM: Atmel megaAVR (1.4.0) > ATmega4809
HARDWARE: ATMEGA4809 16MHz, 6KB RAM, 48KB Flash
PACKAGES:
- framework-arduino-megaavr-megacorex 1.0.7
- toolchain-atmelavr 2.70300.201015 (7.3.0)
LDF: Library Dependency Finder -> http://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 10 compatible libraries
Scanning dependencies...
Dependency Graph
|-- <src>
Building in release mode
Compiling .pio\build\ATmega4809_pyupdi_upload\src\main.cpp.o
src\main.cpp:9:3: error: 'A_Counter' does not name a type
A_Counter =7433; // note the variable is declared in the header file as extern. It is defined here
^~~~~~~~~
*** [.pio\build\ATmega4809_pyupdi_upload\src\main.cpp.o] Error 1
================================================================================================== [FAILED] Took 0.84 seconds ==================================================================================================
The terminal process "C:\Users\Paul\.platformio\penv\Scripts\pio.exe 'run'" terminated with exit code: 1.
seems a bit basic assigning values to variables…thanks for any thoughts on this.
Paul