Re: [Sdcc-user] How to interface Ricoh RS5C372A RTC with 8051 using i2C

[dave j. <s.d...@gm...>]

Jean-Paul wrote:
>
> Hello Dave,

Hi Jean-Paul,

> A stupid question: did you check your hardware and confirm that the two I2C
> physical lines have got pullup resistors?

Yes, both i2c lines have got pull-up resistors.

> The outputs of I2C devices are open collectors (rather open drains nowadays).
>
> The first question in fact: is there some I2C device that actually works in
> your hardware?

No, there's only one i2c device e.g. rtc on my hardware :-(

> Jean-Paul

Regards,
Dave.