Lpc2000

Hello Roy,

Is there a pull-up on the SCL line? I can't find it in the schematic 
drawing but probably I missed it.

As far as I know both lines need a pull-up because SDA and SCL lines are 
'open-drain' outputs.

Best Regards,
Aalt

-- 
==============================
Aalt Lokhorst
Schut Geometrische Meettechniek bv
Duinkerkenstraat 21
9723 BN Groningen
P.O. Box 5225
9700 GE Groningen
The Netherlands
Tel: +31-50-5877877
Fax: +31-50-5877899
E-mail: Lokhorst@...
==============================

neptunus1000 wrote:
> 
> Hello,
> 
> I use an olimex evaboard (LPC2129) and crossStudio.
> I would like to use the I2C interface but it won't work.
> ARM should be the master. First I tried to code it on my own with the
> datasheet. Then I found some example code on the group.
> 
> The methode InitI2C() is working fine. Only the methode
> SendSlaveAdress(unsigned char Addr_S) is working not well. At "while
> (I2STAT != 0x08); // Wait for start to be completed" my code stops
> and is waiting for de SI bit to set. This is never happening. I don't
> understand why it is already stopping here.
> 
> I have nothing connected to the I2C bus, I mean that there is only
> the EEPROM. Which is standard on the evaboard. I'm using 0xA0 address
> for writing and 0xA1 for reading. But it can only by a matter if the
> code can past this line of code "while(I2STAT != 0x08);"
> 
> For who have an interest this is the link the de pcb plan.
>  
> http://microcontrollershop.com/Images/lpc-e2124-sch.gif?
> osCsid=3e8281154ae1883323bdf695bf87d276