On Monday 28 April 2003 09:40 am, Guillermo Rodriguez Garcia wrote:
> Hi all,
>
> I'm trying to implement a SPI to I2C protocol converter in
> a 16F877 PIC. The PIC will be a SPI slave and a I2C master,
> receiving "commands" over SPI and talking to I2C slave
> devices over I2C.
>
>
> ARM CPU                 PIC 16F877                   ???
> SPI master <-----> SPI slave | I2C master <-----> I2C slaves
>
>
> I want to implement SPI in the PIC in hardware (MSSP module)
> and will have a software-based I2C implementation. The main
> problem seems to be accomodating the different speeds at
> which SPI and I2C may operate in the PIC side.

What problems are you having? Both SPI and I2C have their own clock
lines, and in your case you generate the I2C clock yourself. So there
shouldn't be any problems there. You can go as slow as you want.

--
Ned Konz
http://bike-nomad.com
GPG key ID: BEEA7EFE

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