Hi all - 
I'm attempting to monitor the state of the digital pins on my UNO board.
I'm using AS7 and have purchased the license for Visual Studio. I've managed to get the break points to work as expected, but reading the state of the digital pins has not worked out. When I insert a breakpoint and click 'Actions', and then insert {@ReportDigital} in the 'Log a message to Output Window' box, I get this message when I try to compile:

Compiling debug version of 'Direct_Port_1' for 'Arduino/Genuino Uno'
Direct_Port_1.ino:In function `loop
Direct_Port_1.ino:printPortsDigital()
collect2.exe*:error: ld returned 1 exit status
Error creating .elf

I don't know if I'm implementing the digital pin monitoring incorrectly, or if there is some other problem. Any thoughts are greatly appreciated.

As a side note, I tried reading the analog pins using the same method, and had all sorts of compilation errors.

Thanks for any thoughts - Mike 

UPDATE:
For whatever reason, the issue seems to have resolved itself. I tried @ReportDigital again, and it failed to compile as before. Then I tried @ReportAnalog and @ReportFreeMemory, and they failed to compile. I then tried @ReportI2C, and it did compile. I went back to try @ReportDigital again, and it compiled and worked. I have no idea what happened or why, but all is well.

Hi MinM,

I'm experiencing the same thing. Sometimes some of the settings work but often they don't. 

At one time the I2C setting compiled, the next time only Analogs compiles but Analogs and/or Digitals fail with the collect2* error. 

Code that worked properly breaks and won't repair itself by turning reporting off; turning it back on never seems to work. Starting a fresh sketch with one of the reporting options ON seems (?) to work but modifying an older one, not so much. Restarting VS and reloading the sketch also has no influence.

Hi Arjuino,

I plan to look at this this weekend. However you can read anything you want via the breakpoints {digitalRead(13)} so the graphical report isn't that important. You can also use the debugger to toggle them {digitalWrite(13, HIGH)}. You can call any Arduino methods or your own, from the debugger.

You can also use the plot command but it's about to be improved massively. Right now you can do this:-

{@plot.MyChartTest1.Pin13.Red digitalRead(13)}{@plot.MyChartTest2.Pin11.Green digitalRead(11)}
or
{@plot.Pin13 digitalRead(13)}
or
{@plot.MyPins.Pin13 digitalRead(13)}

You can delete the xml files from the __vm folder to clear any previous settings.

Hi Mike, the explained atmel boards are okay but if you go with atmel cpp instead of Arduino your code won't easily port to esp8266 and other Arduino compatible boards.

Great! Thanks, that means it is a compiler cache issue and explains why it appears random.

Will fix.

I hope the latest release fixes this issue with the debugger compiler cache.

Thanks for the reports.