I am using Atmel Studio with the Pro version of VM.  I have written a lot of code with Atmel Studio but this is the first time I have attempted anything Arduino.  At the top of my .ino file I have added a standard header which contains a declaration of a function I wish to use.  In setup() I attempt to call this function, but get the above error.  Any suggestions gratefully received!

/*
* PWMLampController.ino
*
* Created: 4/20/2018 12:52:21 PM
* Author: Marc
*/ 


     #include "HWinit.h"
     



void setup()
{
       /* add setup code here, setup code runs once when the processor starts */
       HWinit(eHWinitStartup);

}

void loop()
{

       /* add main program code here, this code starts again each time it ends */

}

Error...
Warning            HWinit(eHWinitStartup)                  
Warning            In function void setup()            
Error            17:22: error: 'HWinit' was not declared in this scope      

Just did a "Rebuild Solution" and the error pops up.  HWinit.h contains all the register settings that I require and a declaration of HWinit():
void hwINIT(hwinit_t initType);

This code is more or less duplicated from a previous project

Arduino board is an Atmega2560

Sorry, can't seem to see how to attach a file

Can't imagine how I did not see this before, sorry

7zip opens Rar files, but here is a zip

Oh yes, silly me.  My default coding style is to start with caps but apparently Arduino is the other way around.  I still get an error, but subtley different:

Compiling debug version of 'PWMLampController' for 'Arduino/Genuino Mega w/ ATmega2560 (Mega 2560)'

Error linking for board Arduino/Genuino Mega w/ ATmega2560 (Mega 2560)
 
ccpCmymh.ltrans0.ltrans.o*: In function main
ccpCmymh.ltrans0.o*: (.text.startup+0x232): undefined reference to HWinit(hwinit_t)
Debug build failed for project 'PWMLampController'
 
collect2.exe*: error: ld returned 1 exit status

I might try VS2017 when I am less busy

Just for a change I included a different header and called a function from it in setup() - same result.  I also tried calling HWinit() in loop() - again an error.  If I comment out the #include for HWinit.h then it correctly complains that it can't see eHWinitStartup - so it must be reading the file. I am at a loss!

Sorry for the delay. You previous attached project builds okay for me so maybe some previous renaming of code files has left the temp build folder in a bad state. Click "Build>Clean Solution" to ensure a clean build.

tip

Keep in mind that removing code from the solution but leaving the files in the project folder will not remove them from builds. The arduino ide would also still attempt to compile these files so visual micro honors this rule (for any code in the project folder.) Un-expected duplicate code can cause the issue you have posted.

Thanks for the update. .c files should be okay as long as they are included and written with c constraints in mind.

Compilation speed is improved if you check "vmicro>compiler>high speed build" because threads are used.

USB upload can be slower than programmer such as JTAG and if you have hardware debug facility then gdb is the way to do.

The different arduino tool chain versions can differ in speed quite a lot.

The serial debug is designed for boards that do not support gdb or that need to be debugged over bluetooth or rf  etc.