Lpc2000

--- In lpc2000@yahoogroups.com, "johnsonnenberg99"
<johnsonnenberg99@y...> wrote:
> 
> I just can't get the SPI port on the 2132 to work (master mode).  
> Any help would be MUCH appreciated!
> I've setup the pin connect block per the manual, enable the SPI port 
> in the PCONP register, programmed the SPI registers, and then try to 
> send a byte.  It appears to send in software, and the SPIF bit get 
> set, but nothing comes out the MOSI pin or the SCK pin (both stuck 
> low).  I don't think I have a short on the PCB.
> 
> Here's the main sections of code 
> 
> 
> //********************************************
> //********************************************
> void OpenMasterSPI0(void)
> {
>   PCONP_bit.PCSPI0 = 1;               // enable the SPI hardware
>   PINSEL0 = PINSEL0 & 0xFFFF00FF;     // set the pin-select 
> regisgters to enable the SPI pins
>   PINSEL0 = PINSEL0 | 0x00001500;     // Enable SPI pins, but do not 
> use the Slave Select Pin.  It is GPIO.
>   // set the pins to SPI
>   SPCCR0 = 128;                       // clk for the SPI clock.  
>   SPCR0 = 0x20 ;                      // master mode, active high 
> clock, no IRQ
> }
> 
> 
> //*****************************************************
> // Write a byte to the SPI, and also read one in. 
> //*****************************************************
> char WriteReadSPI0(char b)
> {
>   int i=0;
>   SPDR0 = b;                // this write starts the spi transmission
>   i=0;
>   while( i == 0 )
>         i = (SPSR0 & 0xff);   // wait till we are done. 
>   return SPDR0;
> }
> 
> Thanks in advance for any ideas.

Hi,
 you must use the SSEL0 input an apply a high to this pin to enable
the SPI0 controller.

ANdreas