Lpc2000

Hi All

Just a quick question about SPI.

Today I tried to use it for the first time but had no luck. Possibly 
someone has a tip.

Here's what I am doing:
1. Set SPI ports for SPI operation
     *(unsigned long*)*0xe002C000 |= 0x00000050 // PINSEL0
2. Setup SPI speed
     *(unsigned long*)*0xe002000C = 0x00000020  // SPCCR
3. Setup SPI to master mode
     *(unsigned long*)*0xe0020000 |= 0x00000020  // SPCCR 
4. Send a test byte    
     *(unsigned long*)*0xe0020008 = 0x00000055  // SPDR

After the last command the status register has the bit 0x80 (SPIF) 
set to 1, indicating that the transfer has completed (before it was 
at 0), but I see no data sent (neither signals on the clock line nor 
the data line nor the SSEL line). In fact they all seem to be in a 
high impedence state since I measure zero voltage (or 3V3 with a 
pull up resistor).

Therefore I conclude that I have problems setting the SPI ports to 
the correct mode but PINSEL0 seems to be correct (which I have 
verified several times to be sure).

So what is the trick involved to get it working?

Thanks in advance

regards

Mark Butcher

www.mjbc.ch