Thread: [Flashforth-devel] PIC18F87J50

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Hi Michael,

Any thoughts/hints on setting up FF3.8 on the PIC18F87J50 ?
Similar to the PIC18F87J11 but with USB.
FF_USB_18F87J50.LIB ?

Pete

On 07/23/2013 12:15 AM, Pete Zawasky wrote:
> Hi Michael,
>
> Any thoughts/hints on setting up FF3.8 on the PIC18F87J50 ?
> Similar to the PIC18F87J11 but with USB.
> FF_USB_18F87J50.LIB ?
>
> Pete
Hi Pete,
As you know the J series does not have any eeprom so it does not work 
with FF 3.8.

I have a FF3.x  proto for the J series somewhere that could be 
integrated into FF 3.8 and the USB lib
recompiled for the 87J50.

BR Mike

Yes, I thought we covered this (without the USB) almost 2 years ago 
regarding the PIC18F87J11 but I can't find any info here.
I only see  the p18f87j11.cfg file in FF3.8 .
I never tried it as I don't have any PIC18F87J11 chips here, only the 
PIC18F87J50.

Maybe I'm thinking of the PIC33FJ128 in FF4.8 .

Let know if you find anything on the FF that would work on chips with no 
eeprom.

Pete

*****************************************************************************************

Hi Pete,
As you know the J series does not have any eeprom so it does not work
with FF 3.8.

I have a FF3.x  proto for the J series somewhere that could be
integrated into FF 3.8 and the USB lib
recompiled for the 87J50.

BR Mike

Hi Mikael,

Upon further review and research through the data sheets, I think the J 
chips (especially the PICF87J50) are not a good match for us and FF.  
The limited FLASH writes are a show stopper.

The last board I did contained the PIC18F4550 for USB reasons.  I think 
I will just revisit that design but try to use the newer PIC18F45K50.

Pete

Hi,

On 07/25/2013 08:28 PM, Pete Zawasky wrote:
> Hi Mikael,
>
> Upon further review and research through the data sheets, I think the J
> chips (especially the PICF87J50) are not a good match for us and FF.
> The limited FLASH writes are a show stopper.
You are right about that. I had forgotten that the J series has a quite 
small
flash write endurance.
>
> The last board I did contained the PIC18F4550 for USB reasons.  I think
> I will just revisit that design but try to use the newer PIC18F45K50.
Check to which adresses the USB dual port memory is mapped.
Is it the same is in the PIC18F14K series or the 18F2455 series ?

Mike

Thread: [Flashforth-devel] PIC18F87J50

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