I installed the Digispark bords as shown here using this link http://digistump.com/package_digistump_index.json:

http://digistump.com/wiki/digispark/tutorials/connecting
It’s work fine from the arduino environment, but when I try to compile in Visual Micro I get errors.

My code is the simple blink...:
void setup() {
                           //All pins are capable of Digital output, though P5 is 3 V at HIGH instead of 5 V
                           pinMode(1, OUTPUT); //0 is P0, 1 is P1, 2 is P2, etc. - unlike the analog inputs, for digital outputs the pin number matches.
}
 
void loop() {
                           digitalWrite(1, HIGH); //Turn the pin HIGH (5 V)
                           delay(1000);
                           digitalWrite(1, LOW); //Turn the pin LOW (GND)
                           delay(1000);
}


If I compile for debug I get:
 
Compiling debug version of 'AtTiny' for 'Digispark (Default - 16.5mhz)'
AtTiny.ino:In function 'void setup()
AtTiny.ino:6:70: error: no matching function for call to 'VisualMicroDebug::begin(TinyDebugSerial*, long int)
:void setup() { 
    debugger: The error shown above might be caused by invalid breakpoint syntax?
AtTiny.ino:candidates are
AtTiny.ino:In file included from
VM_DBG.h:begin(HardwareSerial*)
:void begin(HardwareSerial *theSerial)
VM_DBG.h:candidate expects 1 argument, 2 provided
VM_DBG.h:begin(HardwareSerial*, long unsigned int)
:void begin(HardwareSerial *theSerial, unsigned long baud)
VM_DBG.h:no known conversion for argument 1 from 'TinyDebugSerial*' to 'HardwareSerial*
Error compiling project sources
 
If I compile for release i get:
 
Compiling 'AtTiny' for 'Digispark (Default - 16.5mhz)'
Binary sketch size: 650 bytes (used 11% of a 6.012 byte maximum) (0,60 secs)
Uploading to I/O board using 'COM6'
Upload failed. Did you select the correct upload method for this board?
System.NullReferenceException: Object reference not set to an instance of an object.
   at Visual.Micro.MiroAppAPI.debug.AvrdudeUploader.uploadUsingPreferences(String buildPath, String className, Boolean verbose, Boolean ProgrammerUploadUsing, String mcuProgrammerOverrideName)
   at Visual.Micro.MiroAppAPI.SketchEditor.Upload(Boolean verbose)
 
Beside the compilation problems, I don’t know how to select COM port.
 
When compiling and uploading form Arduino, it asks me to connect the AtTiny after compiling:
 
Build options changed, rebuilding all
 
Sketch uses 302 bytes (5%) of program storage space. Maximum is 6,012 bytes.
Global variables use 9 bytes of dynamic memory.
Running Digispark Uploader...
Plug in device now... (will timeout in 60 seconds)

What am I doing wrong?

Hi Tim

As I wrote, I did try that, if I compile for release i get:

Compiling 'AtTiny' for 'Digispark (Default - 16.5mhz)'
Binary sketch size: 650 bytes (used 11% of a 6.012 byte maximum) (0,60 secs)
Uploading to I/O board using 'COM6'
Upload failed. Did you select the correct upload method for this board?
System.NullReferenceException: Object reference not set to an instance of an object.
   at Visual.Micro.MiroAppAPI.debug.AvrdudeUploader.uploadUsingPreferences(String buildPath, String className, Boolean verbose, Boolean ProgrammerUploadUsing, String mcuProgrammerOverrideName)
   at Visual.Micro.MiroAppAPI.SketchEditor.Upload(Boolean verbose)

I can't figure out how to deselect the COM port in Visual Studio.

I even tried copying the .ino file to a new empty folder, but Visual Micro remembers that it should use COM6.

I'm using Visual Studio 2015.

I didn't do anything special, but I can see that Arduino selected "AVRISP mkII" as prgrammer when I selected the board from Digispark.

I tried to do as you suggested and select "AVRISP mkII" as programmer and select"Always upload using programmer".

Now I get this error about MCUPreference not found:

Compiling 'AtTiny' for 'Digispark (Default - 16.5mhz)'
Binary sketch size: 650 bytes (used 11% of a 6.012 byte maximum) (0,14 secs)
 
Uploading to I/O board using 'AVRISP mkII'
Error during upload using programmer
MCUPreference property not found: program.pattern
The uploader returned an error

I did not use "File>Upload using programmer", it just worked.
If I don't use "always upload using programmer" i get this error:

Compiling 'AtTiny' for 'Digispark (Default - 16.5mhz)'
Binary sketch size: 650 bytes (used 11% of a 6.012 byte maximum) (0,37 secs)
 
Uploading to I/O board using 'USB'
Upload failed. Did you select the correct upload method for this board?
System.NullReferenceException: Object reference not set to an instance of an object.
   at Visual.Micro.MiroAppAPI.debug.AvrdudeUploader.uploadUsingPreferences(String buildPath, String className, Boolean verbose, Boolean ProgrammerUploadUsing, String mcuProgrammerOverrideName)
   at Visual.Micro.MiroAppAPI.SketchEditor.Upload(Boolean verbose)

The error with MCUPreference is also described here:
http://www.visualmicro.com/forums/YaBB.pl?num=1416119668
and here:
http://www.visualmicro.com/forums/YaBB.pl?num=1448307248
but nobody found a solution.
It can be reproduced without having the device connected.

The latest release hopefully fixes this issue. Please download from "tools>extensions & updates"

For some reason the digiboard has both a bootloader upload tool defined and a programmer (micronucleus) tool defined. Visual Micro defaulted to using the programmer but the digi definitions are only part complete.

The arduino ide used the bootloader and ignored the programmer setting so visual micro now does the same.

+ The debugger should support the TinySerial however the serial is defined to be transmit only, I expect that is because only one pin can be used? Anyway you will need to ensure all your breakpoints are Trace points that are set to continue execution  (no break) otherwise I doubt the debug will work.

Thanks for the report.