question about the pin to pin connections on a SPI interface

[wdmagic]

ok that was way over my head, first it sounded like you have my PIC sending commands out, however this is a thermostat chip sending data to my PIC, there is no control that i have seen it just streams data out over and over from what i can tell. So I think im supposed to use a shiftin? as that was the only word i recognized all the rest of what you said lost me. I can build the circuit just as they have it in the picture, thankfully they have a resolution high enought for me to read the pinouts, but i could use some help on the code for that particular circuit, with the only change being that the chip I am using is a 18f4550. I did find a article that said the SDO should go to SDI and vice versa, but other than that Im lost.

[mackrackit]

'Alias pins - MAX6675 temp sensor
MXSCLK  VAR     PORTA.0   'Clock
MXCS    VAR     PORTA.1    'Chip Select
MXSO    VAR     PORTA.2   'Serial out
TRISA =%00000000
DEFINE SHIFT_PAUSEUS 100
ADCON1 = 15		' All I/O pins digital
CMCON = 7
TRISD =%00000000 
 'Allocate MAX6875 Variables
MXTemp  VAR     WORD    'raw data from 6675/type K sensor
TempC   VAR     WORD 'BYTE[16]    'converted to degrees C
TempF   VAR 	WORD

READ_TEMP:
MXCS = 0  'Chip select low
shiftin MXSO, MXSCLK, 0, [MXTemp\16]   'read the data to MXTemp
MXCS = 1    'Chip select high
TempC = MXtemp >> 5   'right shift the data 5 places to get degrees C (Read the Data sheet)
TempF = ABS(TempC) */ 461
TempF = TempF + 32