flashforth-devel

Re: [Flashforth-devel] K42 problem

[Attila H. <exp...@vn...>]

Hi Mike,

Thanks for your suggestion.
The flash_write_inner_loop modification has solved the problem at 25K42.
In this case, the interrupt was not the reason of the trouble.
I will try FF also with larger K42 controllers.
With the elimination of the interrupt problems, the K42 family could 
become the best alternative of K22.

BR   Attila

Re: [Flashforth-devel] K42 problem

[Mikael N. <mik...@fl...>]

Thanks for the feedback.

I need to rearrange the config file accordingly.

None of my uses of FlashForth has been actually using any extra 
interrupts.
Polling has been fast enough.

So maybe a fully polling version could be made where also the UART RX is 
polled.
At least for code compilation that should be possible to make work with 
end-of-line flow control.

The K83 family has the same core as the K42, and sadly the same 
interrupt problem.

BR Mikael


On 2019-06-24 23:19, Attila Herman wrote:
> Hi Mike,
> 
> Thanks for your suggestion.
> The flash_write_inner_loop modification has solved the problem at 
> 25K42.
> In this case, the interrupt was not the reason of the trouble.
> I will try FF also with larger K42 controllers.
> With the elimination of the interrupt problems, the K42 family could
> become the best alternative of K22.
> 
> BR   Attila
> 
> 
> 
> _______________________________________________
> Flashforth-devel mailing list
> Fla...@li...
> https://lists.sourceforge.net/lists/listinfo/flashforth-devel

-- 
--
Mikael

Re: [Flashforth-devel] K42 problem

[Mikael N. <mik...@fl...>]

Hi all PIC18xx K42/K83 users.
I finally managed to get the interrupts to work.

After some research and good luck it seems I found an undocumented
bug in the processor core of those chips.
By adding a NOP after every POP instruction the interrupts work in 
stable manner.

I am waiting for Microchip support to acknowledge this.
But at least FlashForth works now in a stable manner on those chips.

The vectored interrupts are not yet implemented.

BR Mike

On 2019-06-24 23:19, Attila Herman wrote:
> With the elimination of the interrupt problems, the K42 family could
> become the best alternative of K22.
> 
> BR   Attila

Re: [Flashforth-devel] K42 problem

[Attila H. <exp...@vn...>]

Many thanks Mikael!
I will try it as soon as I have some time.

BR   Attila

2019. 09. 10. 19:39 keltezéssel, Mikael Nordman írta:
> Hi all PIC18xx K42/K83 users.
> I finally managed to get the interrupts to work.
>
> After some research and good luck it seems I found an undocumented
> bug in the processor core of those chips.
> By adding a NOP after every POP instruction the interrupts work in 
> stable manner.
>
> I am waiting for Microchip support to acknowledge this.
> But at least FlashForth works now in a stable manner on those chips.
>
> The vectored interrupts are not yet implemented.
>
> BR Mike
>
> On 2019-06-24 23:19, Attila Herman wrote:
>> With the elimination of the interrupt problems, the K42 family could
>> become the best alternative of K22.
>>
>> BR   Attila
>
>
> _______________________________________________
> Flashforth-devel mailing list
> Fla...@li...
> https://lists.sourceforge.net/lists/listinfo/flashforth-devel