Lpc2000

Hi Sridhar,

in master mode SCK , MOSI are outputs and MISO is an input.
SCK is generated by the uC, the frequenc are set by using the SxSPCCR
register.

Andreas Haack--- In lpc2000@yahoogroups.com, Sridhar gadda
<sridhargadda@y...> wrote:
> Hi, 
>  
>             So,  SCK0 signal we should generate through software
control or µc generates on its own when you set register S0CPCCR ??? 
( when µC as master )
>  
>  Regards 
> 
> haack0815 <lpc_arm@s...> wrote:
> 
> Hi Sridhar,
> 
> if the SPI is configured as master the SSEL pin is an input and must
> be held high (pullup)to opperate.
> You must chose another I/O pin for the chip select signal of the slave
> device.
> 
> Andreas Haack
> --- In lpc2000@yahoogroups.com, Sridhar gadda <sridhargadda@y...> wrote:
> > Does that mean I should give 3.3v at pin SSEL ? 
> > could you explian your sencntence "you have make pull up a 3.3V for
> > SPI interface to act as a master, and to choose other pin GPIO for
> SSEL!!! " .........why sould I choose other GPIO as SSLE ???
> >  
> > regards 
> >  
> > Sridhar
> > 
> > 
> > dasbento@a... wrote:
> > 
> > Hello,
> > when you configured as SSEL, you have make pull up a 3.3V for
> > SPI interface to act as a master, and to choose other pin GPIO for
> SSEL!!!
> > 
> > Domingos
> > 
> > 
> > 
> > 
> > Citando Sridhar gadda :
> > 
> > > 
> > > Hi, 
> > > when you configured SPI interface , Master as µc. In manual its
> > > r> eturn that "LPCconfigured as SPI master MUST select SSEL
> > functionality on
> > > a> n appropriate pin and have HIGH level on this pin in order to act
> > as a
> > > mast> er" (page 170)
> > > 
> > > if you configure PINSEL0 = 0x00005500 // selects SCK0, MISO,
MOSI and
> > > SSL> E 
> > > 
> > > but how can we generate HIGH on SSLE pin which is P0.7..........As
> > far as
> > > > I know you can only generate HIGH on GPIO pins only if they
> > configured as
> > > O> UTPUT pins. 
> > > 
> > > My question is how to generate high on SSLE when it is not
> > > con> figured as GPIO pin.
> > > 
> > > Any help and suggestions would be appreciated.
> > > 
> > > Thanks in advance.
> > > 
> > > With regards,
> > > 
> > > Sridhar
> > > 
> > > 
> > > 
> > > 
> > >
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