LPC2378-STK SSP problem

Development Boards MicroMod
1

I am trying to get the SSP to communicate with the LCD. I am using gcc (4.1.1). I found some SSP code found in http://www.standardics.nxp.com/support/ … vision.zip. I have modified the pin mapping of the code to work with the LPC-2378-STK.

When I monitor the MISO0 pin (1.23), I get a constant 2.4 volts on an oscilloscope while sending (or not sending) data using the code below.

void InitLCD(void) 
{
  int i, Dummy;
  FIO1DIR |= BIT26; //Set backlight pin to output

  Backlight(1); //Turn on backlight
 
   /* enable clock to SSP0 for security reason. By default, it's enabled already */
   PCONP |= (1 << 21);
 
 	/* Output port 1.20 SSP0 SCK0, port1.21 SSP0 SSEL0, port1.23 SSP0 MISO0*/
	PINSEL3 |= 3 << 8 | 3 << 10 | 3 << 14;  
  
    /* Set DSS data to 9-bit, Frame format SPI, CPOL = 0, CPHA = 0, and SCR is 15 */
    SSP0CR0 = 8 | 7 << 8;

    /* SSPCPSR clock prescale register, master mode, minimum divisor is 0x02 */
    SSP0CPSR = 0x2;
    
    for ( i = 0; i < FIFOSIZE; i++ )
    {
		Dummy = SSP0DR;		/* clear the RxFIFO */
    }

    //if ( install_irq( SPI0_INT, (void *)SSP0Handler, HIGHEST_PRIORITY ) == FALSE )
    //{
		//return (FALSE);
    //}
    
    /* Device select as master, SSP Enabled */
    SSP0CR1 = 1 << 1;
    /* Set SSPINMS registers to enable interrupts */
    /* enable all error related interrupts */
    //SSP0IMSC = SSPIMSC_RORIM | SSPIMSC_RTIM;
}

void WriteSpiData(unsigned int data)
{
    char Dummy;
    while ( !(SSP0SR & SSPSR_TNF) );
		SSP0DR = (data | 0x0100);
		/* Wait until the Busy bit is cleared */
		while ( !(SSP0SR & SSPSR_BSY) );
}

http://www.standardics.nxp.com/support/ … pc2378.pdf

PCONP is on page 55. PINSEL3 is on page 126. SSP registers (SSP0CR0, SSP0CPSR, SSP0CR1, SSP0SR and SSP0DR) is on page 389-391.

I have performed a sanity check by setting the direction of pin 1.23 to output and toggling the pin on and off. It shows up as a full 3.3 volts change.

What could I be doing wrong? (It seems like I am not setting up the peripheral output correctly but I have checked the code. :frowning: )