C8051F120 Silabs Microcontroller SPI Problem??

Hi all,

I am interfacing C8051F120 Silabs microcontroller for one of my application.
Description of the Application:

Data Acquisition and Controlling.16 bit ADC and DAC are connected to C8051F120 uC Via SPI.I need to acquire data from the Battery using ADC and Control the Battery(Charge/Discharge) using DAC.

I am not seeing Clock out on SCK pin.(I have checked using Oscilloscope).

Here is my Code.(The code is for ADC)

<pre>#include <c8051F120.h>
#include <stdio.h>

#define ADC_CH0 0x87
#define ADC_CH1 0xC7
#define ADC_CH2 0x97
#define ADC_CH3 0xD7
#define ADC_CH4 0xA7
#define ADC_CH5 0xE7
#define ADC_CH6 0xB7
#define ADC_CH7 0xF7

sbit CS_ADC1=P0^5;
sbit BUSY1=P3^0;


#ifndef BYTE
#define BYTE unsigned char
#endif

#ifndef UINT
#define UINT unsigned int
#endif


void Reset_Sources_Init (void);
void OSCILLATOR_Init (void);
void PORT_Init (void);
//void UART0_Init (void);
void SPI0_Init (void);
void Init_Device (void);

// The following functions save and restore SFRPAGE:
void SPI_Write (UINT address, BYTE value);
BYTE SPI_Read (UINT address);
void adc_convert (UINT);

unsigned char adcresult=0;
unsigned char adc_lowbyte=0,adc_highbyte=0;


void Reset_Sources_Init()

{
WDTCN = 0xDE;
WDTCN = 0xAD;
}

void Oscillator_Init()
{
int i = 0;
SFRPAGE = CONFIG_PAGE;
OSCXCN = 0x67;
for (i = 0; i < 3000; i++); // Wait 1ms for initialization
while ((OSCXCN & 0x80) == 0);
CLKSEL = 0x01;
OSCICN = 0x00;

}

void Port_IO_Init()
{
SFRPAGE = CONFIG_PAGE;
XBR0 = 0x07;
XBR1 = 0x14;
XBR2 = 0xC4;

P0MDOUT = 0x35;
P1MDOUT = 0x71;
P2MDOUT = 0x73;
P3MDOUT = 0x0F;
SFRPAGE = CONFIG_PAGE;
P5MDOUT = 0xFF;
P6MDOUT = 0xFF;
P7MDOUT = 0xFF;
}

void SPI0_Init()
{
SFRPAGE = SPI0_PAGE;
SPI0CFG = 0x40;
SPI0CN = 0x0D;
SPI0CKR = 0xDC;
}

void Init_Device (void)
{
Reset_Sources_Init ();
OSCILLATOR_Init ();
Port_IO_Init ();
SPI0_Init ();
}

void ADC_Write (UINT channel)
{
BYTE save_sfrpage = SFRPAGE;
SFRPAGE = SPI0_PAGE;

// Writing a byte to the EEPROM is a five-step operation.

// Step1: Set the Write Enable Latch to 1
CS_ADC1 = 0; // Step1.1: Activate Slave Select
SPI0DAT = channel; // Step1.2: Select channel
while (!SPIF); // Step1.3: Wait for end of transfer
SPIF = 0; // Step1.4: Clear the SPI intr. flag
CS_ADC1 = 1; // Step1.5: Deactivate Slave Select
//Delay_us (1); // Step1.6: Wait for at least
// T_NSS_DISABLE_MIN
SFRPAGE = save_sfrpage;
}

BYTE ADC_Read ()
{
BYTE value;
BYTE save_sfrpage = SFRPAGE;
SFRPAGE = SPI0_PAGE;

// Reading a byte from the ADC is a three-step operation.
// Read the value returned
CS_ADC1 = 0;
SPI0DAT = 0; // Dummy write to output serial clock
while (!SPIF); // Wait for the value to be read
SPIF = 0;
CS_ADC1 = 1; // Deactivate Slave Select
//Delay_us (1);
value = SPI0DAT; // Store EEPROM value in local var.

SFRPAGE = save_sfrpage;
return value;
}

void adc_convert (UINT adc_Ch)
{
ADC_Write(adc_Ch);
while(BUSY1==1);
if(BUSY1==0)
{
adc_highbyte=ADC_Read ();
adc_lowbyte=ADC_Read ();
}
}

void main(void)
{
Init_Device();
SFRPAGE = SPI0_PAGE;
while(1)
{
adc_convert (ADC_CH0 );
}
}</pre>

I am not able analyze the problem.Can somebody suggest me to solve my problem.

Thanks and Regards,

Y.Viswanath.