Lpc2000

Hi everbody!

I am trying to solve some problems regarding with the
SPI  in LPC2214 controller from philips. 
The code snippet is below:

#define SPIF (1<<7)
#define SPI0_SEL        0x00000000
#define SPI0_MSTR       0x00000020
#define DATA 0xC1

void main(void)
{
    S0SPCR = 0x00;
    PINSEL0 &= 0xFFFF00FF;
    PINSEL0 |= 0x00005500;
    IO0DIR = SPI0_SEL;
    IO0SET = SPI0_SEL;
    S0SPCCR = 0x08; // also used 0x20
    S0SPCR = SPI0_MSTR;

	while(1)
	{ 
        S0SPDR = DATA;
        while(!(S0SPSR & SPIF)){}
	}
}

This is not working!

I also faced with the same problem with SPI-1 channel.
In philips website there is a document about lpc2214
bugs, actually related about register and
configuration problems. Inside this document there is
no explanaton about this issue. I am wondering that is
philips producing defective or faulty chips?

I am tired since I tried many times to solve this and
I have 10 lpc2214 chips and tried with 4 chips, still
not working!!!

Help please?

regards...

mukadder

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ssel pin on SPI works as enable to the SPI hardware!! I don't know 
why it is that way. You need to connect ssel to 3.3V and forget 
about this pin and everything will work after

Gus

--- In lpc2000@yahoogroups.com, Mukadder CEYHAN <mukadder_c@...> 
wrote:

>
> Hi everbody!
> 
> I am trying to solve some problems regarding with the
> SPI  in LPC2214 controller from philips. 
> The code snippet is below:
> 
> #define SPIF (1<<7)
> #define SPI0_SEL        0x00000000
> #define SPI0_MSTR       0x00000020
> #define DATA 0xC1
> 
> void main(void)
> {
>     S0SPCR = 0x00;
>     PINSEL0 &= 0xFFFF00FF;
>     PINSEL0 |= 0x00005500;
>     IO0DIR = SPI0_SEL;
>     IO0SET = SPI0_SEL;
>     S0SPCCR = 0x08; // also used 0x20
>     S0SPCR = SPI0_MSTR;
> 
> 	while(1)
> 	{ 
>         S0SPDR = DATA;
>         while(!(S0SPSR & SPIF)){}
> 	}
> }
> 
> This is not working!
> 
> I also faced with the same problem with SPI-1 channel.
> In philips website there is a document about lpc2214
> bugs, actually related about register and
> configuration problems. Inside this document there is
> no explanaton about this issue. I am wondering that is
> philips producing defective or faulty chips?
> 
> I am tired since I tried many times to solve this and
> I have 10 lpc2214 chips and tried with 4 chips, still
> not working!!!
> 
> Help please?
> 
> regards...
> 
> mukadder
> 
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around 
> http://mail.yahoo.com
>

Hi Gus,

thanks for your help, it working well!!!
I do not know why philips made such a bug???
it is not written in all documents!

this is a failure of philips!

bye...

--- Gus <gus_is_working@...> wrote:

> ssel pin on SPI works as enable to the SPI
> hardware!! I don't know 
> why it is that way. You need to connect ssel to 3.3V
> and forget 
> about this pin and everything will work after
> 
> Gus
> 
> --- In lpc2000@yahoogroups.com, Mukadder CEYHAN
> <mukadder_c@...> 
> wrote:
> >
> > Hi everbody!
> > 
> > I am trying to solve some problems regarding with
> the
> > SPI  in LPC2214 controller from philips. 
> > The code snippet is below:
> > 
> > #define SPIF (1<<7)
> > #define SPI0_SEL        0x00000000
> > #define SPI0_MSTR       0x00000020
> > #define DATA 0xC1
> > 
> > void main(void)
> > {
> >     S0SPCR = 0x00;
> >     PINSEL0 &= 0xFFFF00FF;
> >     PINSEL0 |= 0x00005500;
> >     IO0DIR = SPI0_SEL;
> >     IO0SET = SPI0_SEL;
> >     S0SPCCR = 0x08; // also used 0x20
> >     S0SPCR = SPI0_MSTR;
> > 
> > 	while(1)
> > 	{ 
> >         S0SPDR = DATA;
> >         while(!(S0SPSR & SPIF)){}
> > 	}
> > }
> > 
> > This is not working!
> > 
> > I also faced with the same problem with SPI-1
> channel.
> > In philips website there is a document about
> lpc2214
> > bugs, actually related about register and
> > configuration problems. Inside this document there
> is
> > no explanaton about this issue. I am wondering
> that is
> > philips producing defective or faulty chips?
> > 
> > I am tired since I tried many times to solve this
> and
> > I have 10 lpc2214 chips and tried with 4 chips,
> still
> > not working!!!
> > 
> > Help please?
> > 
> > regards...
> > 
> > mukadder
> > 
> > __________________________________________________
> > Do You Yahoo!?
> > Tired of spam?  Yahoo! Mail has the best spam
> protection around 
> > http://mail.yahoo.com
> >
> 
> 
> 
> 
> 
> 


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The code does work, if you keep the define SPI0_SEL  as I posted it, 
it is equivalent to setting spi_sel0 high. I captured all the 
waveforms with a scope for documentation.

Herbert Larbie

#define SPI0_SEL          0x00000080

At 13:09 09/05/2006, you wrote:

>Hi everbody!
>
>I am trying to solve some problems regarding with the
>SPI  in LPC2214 controller from philips.
>The code snippet is below:
>
>#define SPIF (1<<7)
>#define SPI0_SEL          0x00000080 not  0x00000000
>#define SPI0_MSTR       0x00000020
>#define DATA 0xC1
>
>void main(void)
>{
>     S0SPCR = 0x00;
>     PINSEL0 &= 0xFFFF00FF;
>     PINSEL0 |= 0x00005500;
>     IO0DIR = SPI0_SEL;
>     IO0SET = SPI0_SEL;
>     S0SPCCR = 0x08; // also used 0x20
>     S0SPCR = SPI0_MSTR;
>
>       while(1)
>       {
>         S0SPDR = DATA;
>         while(!(S0SPSR & SPIF)){}
>       }
>}
>
>This is not working!
>
>I also faced with the same problem with SPI-1 channel.
>In philips website there is a document about lpc2214
>bugs, actually related about register and
>configuration problems. Inside this document there is
>no explanaton about this issue. I am wondering that is
>philips producing defective or faulty chips?
>
>I am tired since I tried many times to solve this and
>I have 10 lpc2214 chips and tried with 4 chips, still
>not working!!!
>
>Help please?
>
>regards...
>
>mukadder
>
>__________________________________________________
>Do You Yahoo!?
>Tired of spam?  Yahoo! Mail has the best spam protection around
><http://mail.yahoo.com>http://mail.yahoo.com
>
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--- In lpc2000@yahoogroups.com, Mukadder CEYHAN <mukadder_c@...> wrote:
>
> 
> Hi Gus,
> 
> thanks for your help, it working well!!!
> I do not know why philips made such a bug???
> it is not written in all documents!
> 
> this is a failure of philips!
> 
> bye...

I don't think so...  If SSEL is low it selects the SPI as a slave;
clearly documented.  To prevent the SPI from being selected as a
slave, the signal must be high and held there - a pullup resistor is
appropriate.

Further, SSEL is an input and inputs can never be allowed to float.  I
agree that there could be a note in the datasheet but I have never
seen a 'perfect' datasheet.  But I do think that Philips is doing much
better than most with their technical writing.

Richard