Reset MCU by itself.

[Sergejs]

Sometimes I need to refresh algorithm from any point to Start. I made pinout logical "1" with resistor 240 Ohm to RST pin. When counter counts to some value, program make RST to zero by this pinout put in logical "0" and MCU starts working from begin. Is this way correct or may it call any problems in future?

[stefan.erni]

Hi Sergejs

What kind of processor do you have?
Many have a command for reset. So you can use a C command.
Or you can use a watch dog that you don't reset anymore. Then your processor will restart.

regards


Stefan

[Sergejs]

Hello, I use Arduino Nano. I don't know any program language. When I turn On WDT it restarts every time, just MCU not started yet WDT make reseting all the time and MCU never start working. I don't know why but it happen on all my projects with any PIC or Atmega.

[p.erasmus]

HI

When I turn On WDT it restarts every time, just MCU not started yet WDT make reseting all the time and MCU never start working.

Well that is the job of the WDT to reset the microcontroller and you need to clear it in Code or swith it off ,if not the mcu will always reset.
then you need to pull the MCLR pin up to VDD if not the mcu will also reset all the time ,

If you pull MCLR up you can add a buton as reset button if you want to reset the mcu as one way the second is using the Reset command

PIC_MCLR.jpg (5.52 KiB) Viewed 4145 times

[stefan.erni]

Hi Peter, Hi Sergejs


There is a command but I dont now how to insert it in Flowcode.

It is okay to use a reset switch or a resistor from a port. But you can also try to improve your program so that no reset is necessary.

regards
Stefan

The easiest way to reset Arduino through programming is to use the built-in reset function resetFunc (), which is available in the Arduino libraries. All you need to do is write the code and call the reset function at address location 0. This code will reset your Arduino board and start executing the program from the first line of code

[p.erasmus]

Hi Guys,

I never used this Reset function on either PIC or AVR however I know the XC8 for PIC has Reset() Macro which can be called.
Calling the reset macro from a C Icon seems to compile fine and is generated in the C code so I would think that it will work

for XC8 it is Reset();

P2.jpg (48.67 KiB) Viewed 4116 times

P1.jpg (25.05 KiB) Viewed 4116 times

Maybe some one can try it