[flashrom] Nec/Renesas 78k0s flash programming?

[Riccardo Delpopolo Carciopolo]

Thank you for answering.

Regards

Il giorno ven 3 apr 2015 17:39 Stefan Tauner <
stefan.tauner at alumni.tuwien.ac.at> ha scritto:

> On Mon, 30 Mar 2015 15:56:06 +0000
> Riccardo Delpopolo Carciopolo <rdelpopolo at gmail.com> wrote:
>
> > Hi,
> > I've used flashrom with pickit2 in past.
> > I'm a newbie but I'd like to add support for this MCUs by myself.
> > On Internet exist some parallel programmer but I want to program a 78k0s
> > flash my with the uart protocol.
> > We're can I start from?
> > It requires some vpp pulses to enable the uart programming mode.
>
> I don't think that flashrom is the right tool for the job of writing
> the flash memory of a microcontroller. Usually there are dedicated tools
> for this... but I guess the 78k0s are not really popular? You can of
> course use flashrom or at least its serial.c as a base for your tool.
>
> The protocol seems to be documented in a public application note:
> http://documentation.renesas.com/doc/DocumentServer/U17739EJ3V0AN00.pdf
>
> I am not sure about pulses thing. AFAICT the flash mode is enabled if
> FLMD0 is high when reset is released. I am however unsure if the
> following pulses on the same pin (FLMD0) are to be output by the
> programmer or are a way for the chip to indicate how it needs to be
> accessed... the language in the AN is abysmal. I would apply VCC to
> FLMD0 on reset release with a pull-up resistor and measure if the chip
> outputs anything on the port...
>
> Anyway this is rather off-topic... good luck with your project!
> --
> Kind regards/Mit freundlichen Grüßen, Stefan Tauner
>
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