SPI with Pic24 and ADC

[ernestmyname]

I have been trying to get SPI up between my PIC24 and a MCP3550 ADC. I have tried several different things but i can't figure out why I continually get a zero written in all three of the iWord registers. I have Chip Select at RB2, SDI at RB3, and SCK at RB4. Any suggestions?

Datasheet for ADC:
**broken link removed**

The PIC controller I'm using is the PIC24HJ64gp202

sbit Chip_Select at LATB2_bit;

int main() {
    char Word,Buffer;
    int  iWord1, iWord2, iWord3,i;

    //Unlock_IOLOCK();      //Not sure if I need this
    PPS_Mapping(3, _INPUT, _SDI1);
    PPS_Mapping(4, _OUTPUT, _SCK1OUT);
    //Lock_IOLOCK();        //Not sure if I need this

    TRISB = 0x0008;                //RB3 input for SDI1. RP4 output for SCK1OUT
    Chip_Select = 1;
    delay_ms(250);
     SPI1_Init_Advanced(_SPI_MASTER,_SPI_8_BIT,_SPI_PRESCALE_SEC_8,_SPI_PRESCALE_PRI_64,_SPI_SS_DISABLE,_SPI_DATA_SAMPLE_END,_SPI_CLK_IDLE_HIGH,_SPI_IDLE_2_ACTIVE);

    Chip_Select = 0;
    Chip_Select = 1;
    delay_ms(10);
    
    //Wait for ready_not to equal zero
    while(PORTB.B3 != 0) {
        Chip_Select = 1;
        Chip_Select = 0;
        }

    iWord1 = SPI1_Read(Buffer);
    delay_ms(10);
    iWord2 = SPI1_Read(Buffer);
    delay_ms(10);
    iWord3 = SPI1_Read(Buffer);
    delay_ms(10);

    return 0;
    }

Any help or guidance would be greatly appreciated. I can't figure out what I'm leaving out. I have been stuck on this for several days. Thanks in advance!

 

[FvM]

What's your compiler?

 

[poorchava]

I might be wrong, but aren't portb PBx pins set to be analog by default?

 

[ernestmyname]

Wow - I can't believe I left that out - Compiler is MikroC. I am going to look into the analog configuration now.

[edit] I just hooked it all up to an oscilliscope and learned that the 3550 is not giving me anything on the SDO port. I am welcome to suggestions but will post up if I figure out what is holding it out. I also added the line

    AD1PCFGL = 0xFF;

to ensure that all were configured for digital. I can see that the chip is getting SCK from the uController but the controller is getting a data line that is the same as if it were tied to ground/