Proteus Arduino Leonardo Timer and Wire Library

[vbcoder]

Hello,
I made a project testing timer1 with Leonardo and it works fine. I added wire library to send data to I2C DAC and timer1 starts to not fire although on real hardware it does using same code. I can't tell if it is the crack as Labcenter confirmed it works on their end (I am unlicensed user so naturally could not argue this  )

I have attached the project. All help is appreciated. Thanks

[pickit2]

I think the error is user made. There is no error in the way PDS is patched. the patch has no relationship to parts used.
The parts are used in sample projects and work as expected.

Your project in not a complete package, not a packed pdsprj.
so any error would be lost. if anyone else complies it they may fix the problem.

Note: I would say it's most likely the reason it's not working is the separate code
you posted is not linked to to the project - it is not a VSM studio file.

[vbcoder]

Thanks Pickit,
Actually the Arduino code is correct proof and worked on real hardware. I got your point but eventually Arduino compiler is the same on VSM studio or Arduino IDE as both refers to same compiler.

[Wizpic]

I find when I used the MCP3424 in proteus it does not work or read any of the values to get it to work I had to alter the code but then found the values where all over the place, but the original code worked in real life, sometimes I find that proteus slows down depending on how big a project is, I had the same issue with when I was trying the modbus worked in real life but could never get it to work in proteus for some unknwon reason. So proteus is good for some projects but not others

[Top]

Connect the I2C Protocol Analyzer to IO2 and IO3 and it works.

[vbcoder]

Thanks Top.
I already tried that but it doesn't complete transmission like hanging. Would you tell me what have you done other than I2C connection?

[Top]

Rename SDA to IO2 and SCL to IO3.
Right-click U3 and select Edit Source File.
In New Firmware Project dialog click OK.
Copy source code into the main.ino window.
Start simulation, click Virtual Terminal and press *.

[vbcoder]

Thanks Top again.

I am the person who wrote the firmware. I made the steps you showed me and unfortunately it hangs at either
START
2
OR
START
25

I attached the project after adding the code inside and compiled it with no issues. I really can't figure out what may cause that issue

[Top]

You may have noticed that if you use the internal Arduino compiler, i.e. Arduino AVR (Proteus), then your project works fine but if you use the external Arduino compiler then your project hangs.

The reason for this is that the implementation of the TimerOne library in Proteus re-enables interrupts before calling your interrupt handler. If interrupts are not enabled when you call Wire.endTransmission() then the code can hang waiting for the twi_state flag to update.

To fix this, either re-enable interrupts at the start of your ISR, or, set a flag in your ISR and do the work in your main loop.

[vbcoder]

Thanks a lot Top!

That was exactly the problem. Glad I had you to get it for me 

I attached the code after fixing it by enabling the interrupts() and it now works!