Matrix user forums

Hello everyone, I need to knock up a quick RPM indicator to help calibrate a tacho gauge on a diesel engine, derived from the alternator. I have a Arduino UNO R3 and an LCD available, as well as a photo transistor and UV LED emittor. All I want is to put one white mark on the crank for detection. No...

Benj wrote:Aha,

Timer interrupts are currently known to have problems in simulation.

Does this apply to FC generally or just the chip mentioned

Matt

Yes but will it be able to flash an LED once a second????

Hi Chris,

de google translate à nouveau


Voici quelques liens

https://www.matrixtsl.com/mmforums/vie ... f=5&t=4400

https://www.matrixtsl.com/wiki/index.ph ... _Functions

Matt

Hi

Can you post your chart

Thanks

Hi Viki2000, Thank you so much for the work you have done and also your willingness to share your findings/results. I take great pleasure when you post here and always read through your posts and like how you overcome the problems you encounter. I don't know if Matrix give you any credit for your wo...

Hi Chris, De Google translate Je ne suis pas en train de faire mon PC pour le moment. Jetez un oeil sur les fonctions de chaîne, je suis sûr qu'il y a quelque chose comme "stringtoASC" ou "stringtoCHR" que vous pourriez utiliser. Vous devrez le combiner avec une boucle pour incrémenter l'emplacement...

Hi Chris

John Crow did a good article on VISI

http://www.matrixtsl.com/mmforums/viewt ... isi#p62187

Matt

Hello everyone,

Found the following - thought I'd share


https://www.edn.com/design/systems-desi ... in-EEPROMs

Matt

Hi Chris, There is no plan at the moment but it's something we could potentially look into. For now using a UART component you should be able to communicate with a 4D Diablo display fairly easily. Also as I mentioned the VISI interface should work and has a component available. Using the 4D stuff (...

[quote=] Hi Chris, There is no plan at the moment but it's something we could potentially look into. For now using a UART component you should be able to communicate with a 4D Diablo display fairly easily. Also as I mentioned the VISI interface should work and has a component available.[/quote] Usin...

Hello Everyone, Just a couple of questions for a narrowboat based project with shore hook-up and on-board battery banks. 1. I need to implement an 'Hour Meter' when an engine is running. What method on the uC side could I best use to accomplish this especially as EEPROMs have a finite read write cap...

20. Help which is actual helpful

Like I said , look into different PICS with interrupts. A PIC can be put to sleep and woken up on a key press and or aninterrupt. Continually polling a switch to see if it has been pressed is madness when running on a battery.

Matt

Hi Bill, Don't rush!! You have a lot to do before you finalise your work enough to go into production. Get the normal version then upgrade to the Pro only when you're ready. Don't forget you need to consider CE marking. I don't think the 12F you specified is necessarily the right choice. Have a look...

Hi,

Within the Calculation dialogue box - "Can not" should be "Cannot" as used in this context (honest)

Matt

Hi Billoo, I did mean the specifics of your project not your life LOL I notice you are sourcing the supply to the LEDs, generally speaking sinking is preferred. Have you checked the PICs datasdheet for driving currents. Have you done some research on buffers or transistors etc and pull up /pull done...

Hi Billoo,

Welcome to the forum!

Can you post a little more info of what you're doing , length of timings etc we probably will be able to help a lot more than what's been posted already.

Thanks
Matt

Hi I was just wondering why I am unable to access a single 7Seg Display without having to purchase a Display Lic. but I AM able to access a quad 7 Seg display. I think a multiplexed quad display MIGHT come under the Display License but surely not a single 7 Seg jobby Does anyone else have the same i...

Hi Martin, Yes I see , ok so if I need to go 3 or more bytes you just do multiples of the Byte value so for the third byte you'd multiply by um (scratching at brain) 2^16 (I think) and if you wanted 4bytes you'd do 2^24 etc Further to your suggested post you have a holding variable that when constru...

Hi Gang As per subject -Something I've not done before So, what is the procedure to formulate multibyte data and then transmit it over, say, a serial port then then additionally when receiving data the same thing in reverse (obviously using AND or OR) but nailing the new Byte and Bit position to get...

Hi Leigh,

So I'm guessing timer interrupt to pole the hardware receive register would be the preferred way to go then? Or would an Interrupt on Pin Change Interrupt would be an alternative?

Thanks
Matt

Serial. Easiest to use and most controllers implement it in hardware. I2C would require slave mode which is not commonly available in hardware and is harder to handle. CAN would be another option... Hi Kersing I'm juggling with other stuff which will be hanging off I2C (temperature sensors and addr...

Thanks Martin

Hi Leigh, Further to all the work you and viki2000 have done here, can I take from it that the I2C routines in FC are stable to use as long as they are based on hardware? And therefore can be used across all owned chip pack devises where applicable? Secondly, did you ever sort out an interrupt based...