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Discussion Groups | Piclist | need help plz

A discussion group for the PICMicro microcontroller. Also called the Microchip PIC, this list is dedicated to the use and abuse of this fine, simple, microcontroller. Close to topic posts are welcome, ie. general electronics.

need help plz - farfor1984 - Feb 22 14:31:00 2006

Is it possible to enter part of the program  as a hex code through a 
keypad to the microcontroller, store it in certain place in the memory 
& then run it ?
if this is possible how  it could be handeled ?
thanks in advance .


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Re: need help plz - rtstofer - Feb 28 20:50:00 2006

--- In piclist@picl..., "farfor1984" <farfor1984@...> wrote:
>
> Is it possible to enter part of the program  as a hex code through a 
> keypad to the microcontroller, store it in certain place in the memory 
> & then run it ?
> if this is possible how  it could be handeled ?
> thanks in advance .
>

Read up on self-programming in the 16F877 datasheet.  Since a
bootloader can be loaded on the chip and the bootloader can receive
and program the device, what you are asking is trivial.

Richard


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Re: need help plz - Chad Russel - Mar 1 22:25:00 2006

Yes, very possible.  How easily depends on which PIC you are using.  
You will need to burn a simple bootloader program first.  The
bootloader program needs to read the keypad, write the Flash, and then
execute the code depending on keys pressed.

Regards,
Chad
	--- farfor1984 <farfor1984@farf...> wrote:

> Is it possible to enter part of the program  as a hex code through a 
> keypad to the microcontroller, store it in certain place in the
> memory 
> & then run it ?
> if this is possible how  it could be handeled ?
> thanks in advance .
>
	My software has no bugs, only undocumented features.


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