reset for internal MCLR

[bilal]

hi

how i can make reset for internal MCLR in flowcode ??

[medelec35]

Hi bilal,
I'm assume you would like to have a reset and program via ICSP?

Make sure you have external MCLR set to enable.
The circuitry I thought made sense is:

MCLR cct.png

(4.95 KiB) Downloaded 4374 times

I found it on this website

Martin

[bilal]

thanks

i don't need external MCLR.

I need internal MCLR. By entering a code , through flowcode program.

[medelec35]

i don't need external MCLR.

Oops sorry, I misread your post.
Its the opposite.
Select Build, project options.
Then select Configure tab.
Make sure you have external MCLR set to disable (or internal depending target device).
Also make sure PLL(unless pll is required) , watchdog and Low voltage programming is also set to disabled (or internal depending on target device).

Then MCLR can be used as an input if target device allows.

Martin

[bilal]

sorry
in external MCLR , if i press switch for reset he will reset.

in internal there is no switch for reset what i will do to make reset?? can you give me the code in flowcode it can make reset for internal MCLR.

thank you very match

[medelec35]

You can use a c code block:

Code: Select all

reset();

So you could connect a switch and pull-up resistor to any i/p port including MCLR as an i/p
Then have a decision icon.
if i/p = 1 then C code block

Code: Select all

reset();

Other wise as far as I'm aware, you can't use a switch to reset if MCLR is configured to internal

[bilal]

thanks very match.

can you give me a file in flowcode for example.

if i but "reset" only or like this "reset_MCLR;" .

[medelec35]

Thinking about it, I'm a bit confused.
Why do you want an internal reset when you can just have the standard external reset?

If using an internal reset and activated by a switch, then unless using an internal weak pull-up, a resistor and a switch are required plus some code.
If using an external reset then only a switch and resistor are required and no additional coding.

If you really want an internal reset then if you post the flowchart I will modify it for you.

Martin

[bilal]

okay i will give example file:

I want to use all pin in the IC pic16f676.

[medelec35]

Try again with your flowchart but re-read this post first.

[bilal]

thanks.

I did not understand the meaning of the i/p in post.
(if i/p = 1 then C code block)

did my example file is correct ?! CONFIGURE AND SWITCH AND LED AND C CODE..??

in pic16f676
switch = RA0
LED = RA3/MCLR/VPP

[kersing]

LED = RA3/MCLR/VPP

This will not work, if you check the data sheet for the chip you will see:

RA3 TTL — Input port with interrupt-on-change.

So RA3 is input only and can not be used to output to a LED.

[medelec35]

did my example file is correct ?! CONFIGURE AND SWITCH AND LED AND C CODE..??

No I pointed to my post because you have a c code block with

Code: Select all

reset;

, but it should be

Code: Select all

reset();

That along with kersing post should help you get your flowchart sorted out.

I did not understand the meaning of the i/p in post.
(if i/p = 1 then C code block)

That just means read an input pin.
Using a decision branch:
If true (=1) then

Code: Select all

reset();

Or you could do if =0 then

Code: Select all

reset();

instead.

[bilal]

thanks, I understood

So RA3 is input only and can not be used to output to a LED.

This is a new problem emerged ...... why!!! Because of that in flowcode program in simulations accept output from RA3 AND LED IS WORK IN SIMULATION!!