Lpc2000

Hi Sridhar,

a discription about the power control is in the user manual under the
chapter system control block. But as default the SPI controller is
always enabled after reset.

What value has the PINSEL0 register after you logical ored it with
0x00005500 to select the SPI0 pins?

Andreas




--- In lpc2000@yahoogroups.com, Sridhar gadda <sridhargadda@y...> wrote:
> Hello Andreas, 
>  
>                               In my initial_serial function, I just
initialized UART1 Pins. and you are talking about powercontrol for
SPI0 controller enabled ???????  could you explain where can I get
more information about power control enabled........in user manual of
SPI chapter...it is no where mentioned. 
>  
>   Thanks in advance, 
>  
>  Sridhar 
> 
> haack0815 <lpc_arm@s...> wrote:
> 
> Hi Sridhar,
> 
> you are writing any values to the PINSEL0 register in the
> initial_serial function?
> Is the powercontrol for the SPI0 controller enabled ?
> 
> In your init_spi_read function you missed a semicolon.
> But your code in this function will not work anyway.
> You must do a dummy write (generate 8 clock pulses) to the SOSPDR
> before you can read the received value.
> (1. dummy write SPDR, 2. wait until send complete , 3. read SPDR)
> 
> 
> Andreas Haack
> 
> --- In lpc2000@yahoogroups.com, Sridhar gadda <sridhargadda@y...> wrote:
> > Hello Friends, 
> >  
> >                           I defined an SPI interface, µc as master
and 
> > only one salve, I cannot see clock generating at SCK0...I tested with 
> > Oscilloscope....Please you check the code ..and where am I doing
error 
> > ???
> >  
> > void init_spi(void)
> > {  
> >    S0SPCCR = 0x08;  /* SPI clock */ 
> >    S0SPCR =  0x60;  /* µc as master, LSB as first bit,  CPOL = 0,
CPHA 
> > = 0 */ 
> >    IOSET1 = 0x00010000;  /* Blink LED */
> > }  
> >  int init_spi_write(void)
> >  {
> >  S0SPDR = 0x01;        /* Write Data Address to SPI */
> >  while ((S0SPSR & 0x80) == 0); /* Wait Until SPIE bit is set */
> >  IOSET1 = 0x00100000;   /* Blink the LED */ 
> >  return (S0SPSR);    /* When SPIE is Set, read the Status register*/
> >  }                    
> >  int init_spi_read(void)
> >  {
> >    unsigned int dummy;        
> >    dummy = S0SPDR /* Read the value from SPI */
> >    while ((S0SPSR & 0x80) == 0); /* wait until SPIE bit is set */
> >    IOSET1 = 0x00200000;  /* Blink the LED */
> >    return (S0SPSR);    /* When SPIE bit is set read Status Register */
> >  }
> > int main (void)
> > {
> >   initial_serial();    /* Initialize the Serial Interface with UART */
> >   PINSEL0 |= 0x00005500;     /* SCK0, MISO, MOSI for SPI0 enabled & 
> > SSEL*/
> >   IODIR0 = 0x00003C00;   /* P.10.. P.13 defined as outputs */
> >   IOSET0 = 0x00001400;    /* p.10, p.12 high & P.11, p13 are low to 
> > select CS*/
> >   IODIR1 = 0x00FF0000;  /* Define P1.16 to P1.23 as outside */
> >   IOCLR1 = 0x00000000;       /* Turn off LEDs, you can check your
flash 
> > is working or not */   
> >   init_spi();               /* Initialize the SPI Interface */ 
> >    init_spi_write();  /* Write the data to SPI */
> >    init_spi_read();  /* Read data from SPI data register */
> >    
> > }
> >  
> > I made High on SSLE ...P0.7 to 3.3v........Still I dont see any clock 
> > generating st SCK0 nor any signal at MOSI or MISO.......
> >  
> > I am waiting for your replies, 
> >  
> > Thanks in Advance, 
> >  
> > Sridhar
> > 
> > __________________________________________________
> > Do You Yahoo!?
> > Tired of spam?  Yahoo! Mail has the best spam protection around 
> > http://mail.yahoo.com 
> > 
> > [Non-text portions of this message have been removed]
> 
> 
> 
> 
> Yahoo! Groups SponsorADVERTISEMENT
> 
> 
> ---------------------------------
> Yahoo! Groups Links
> 
>    To visit your group on the web, go to:
> http://groups.yahoo.com/group/lpc2000/
>   
>    To unsubscribe from this group, send an email to:
> lpc2000-unsubscribe@yahoogroups.com
>   
>    Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. 
> 
> 
> 		
> ---------------------------------
> Do you Yahoo!?
>  Yahoo! Mail - 250MB free storage. Do more. Manage less.
> 
> [Non-text portions of this message have been removed]