Lpc2000

--- In lpc2000@yahoogroups.com, "johnsonnenberg99"
<johnsonnenberg99@y...> wrote:
> 
> You are both right.  One MUST enable the Slave Select pin for the 
> SPI to work as a Master.  This is how the 210x processors work, but 
> it was supposed to be changed in the 2132.  Per the 2132 manual, 
> page 157: "One the LPC2132 (unlike earlier versions), the SSEL0 pin 
> can be used for different functions with the SPI0 is is in Maser 
> Mode."  WRONG!
> Thank you all for your help. I've enjoyed lurking in the background 
> on this group. 
> John Sonnenberg
> 
> --- In lpc2000@yahoogroups.com, "haack0815" <lpc_arm@s...> wrote:
> > 
> > --- 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

Sorry for the wrong info, but the older UM of the 2132/38 has an error
and tell that you must pull high the SSEL0 pin and the new UM tells
that you can use this pin as gpio.

Andreas