Matrix user forums

You're welcome, I'm glad the values worked for you as it was only theory. I think I understand, 5 is the ratio between the input voltage and the adc voltage, after the divider. Yes, that is correct. As the voltage going into the top of the R1 is five times higher than the voltage going into the ADC,...

Hello I have moved your post from Programming Tips & Tricks as that section is for sharing tips and not starting with a question. I have calculated R1 to be 33K & R2 to be 8K2 This is handy as they are common preferred values. Then if the voltage goes above 15V,the ADC of the PIC will be protected. ...

Hello. The errors are caused by your microcontroller running out of space. for example 0: (1347) can't find 0x11 words (0x11 withtotal) for psect "text19" in class "CODE" (largest unused contiguous range 0x10) This means that 17 program commands or constant values are required for the microcontrolle...

That's great.
At least you are sorted now.
Thanks for letting us know.

Hi the RTC simulation fix was pushed yesterday. You will need to use Help , Check for updates , then reload flowchart after update has been completed. The flowchart I posted was just a guide on how the time and date can be formatted to look correct. The flowchart also calculates the day of the week ...

Hi.
I believe device ID 0x2080 belongs to PIC16F887.
Is that the microcontroller you are using since that's what's being detected?
The reason I ask is, it looks like you have selected PIC16F877 within Build, Project options.

I have made some modifications for you.
Unfortutunaly there is a bug that has stopes the RTC from updating with PC time.
That has now been fixed and should be pushed out tomorrow.

Hi.
In FC9 I created a display that shows time, & date on an LCD.
You can easily adapt it for a VFD.
The post is here.

Hi. Flowcode v5 has not been supported for some time now. If you would like to either post your v5 flowcharts on here or PM them if you want them to remain private. We can convert them to v9 for you. One thing to be aware of. The compilers used are different, so the memory used up could be a bit mor...

Not a problem.
At least you are up and running and know the Uno is programming OK.
Thanks for letting us know.

Hello You will get a reduction in size, but it probably won't be as much as advertised. Microchip have two options for the XC8 compiler which is not a cheap product. There is a workstation licence There is also a monthly subscription, but it looks like none are available. If not done so before, you ...

Hello. To control the onboard LED, you have the wrong pin selected. This should help Controling onboard LED.png After changing the properties from D7 to B5, the onboard LED flashes every 3 seconds for me on my Uno To answer your questions. Do I have to modify the compile options boxes from default. ...

Hello. The LED won't flash because the pin will be high for 3 seconds, then go low, but it will then instantly go high. It will look like the LED is permanently on. You will need to add another delay below the TurnOff() You should be able to add .fcfx files. If that still does not work, can you post...

Thanks Martin.
As the comms is via UART anyway via the built-in UART to USB, it makes sense to use the UART.
If the UART is missing incoming data, then there is a UART with a circular buffer example

Hi Brandon. Any questions relating to v9 issues should be posted on Flowcode forums Have you run a full database update? There are two ways. When you first run flowcode and have the options of New Project & Open project. Select Library Updates . It will automatically have Full database selected. If ...

Hi Bob, Sounds like you are making good progress. perked version 2 up with a 1 Meg resistor as ref i can get down to 100k ohm with accurate results compared to a fluke but no good for low value ie 180 ohm but this accuracy comes back with the original 267 ref resistor What about my suggestion of f y...

Hi Bob. With the earlier versions, the type of the variable used for PullupResistor is UInit. That means the maximum value is 65535, so you can not have any resistance value greater than 65k. For higher values, you can either use a ULong or Float. It also means the fractional part of the number is i...

Hi Bob. yes, you are spot on. If you want to test resistors in the meg range, then the reference resistor needs to be in the meg range and the .ReferenceResistor has to be set for the same value. I would suggest you need three ranges of ref resistances. Mid 100's ohm Mid 100k's ohm and perhaps mid m...

Hi Bob, the value of the reference resistor can be any value you like. It's only 1.5M because that's what I believe is best for testing resistors in the M range. The lower the resistance will be away from the reference resistor, in theory, the less accurate the results will be. You can change it bac...

Hi Bob. I have got an update for you to try. The hardware should work in the region of MΩ and the open-circuit should work better. It will take ADC input impedance/leakage into account for higher accuracy if you wish change the .PullUpResistorUsed = 1 to .PullUpResistorUsed = 0 within ADC user macro...

Hi Regarding ADC,
Can you see if the attached file works better?
The same as above post, but this time the file belongs:
C:\ProgramData\MatrixTSL\FlowcodeV8\CAL\PIC

Edit: Removed file as not working.

Hi Bruno. Just regarding UART interrupt Browse to this location using file explorer, it's hidden by default so just paste the link into your address bar. C:\ProgramData\MatrixTSL\FlowcodeV8\FCD\PIC Replace the existing file with the attached file. If Flowcode was running when you replaced the file, ...

Do you have a ref resistor going from the ADC pin to VDD and a test resistor going from ADC pin to GND?

In that case, within main.
can you change:
If R = 0 to If R < 0.1

Hi Bob.
If the display does not show not connected, what does the display show as the value being?
When you get the reading, you can then change the in main to if R < (ValueShown + 0.1)
Perhaps the maths is making the value slightly larger, e.g. 0.0001, which then means R is not 0.