Hi,

Has anyone tried interfacing to the MCP3221 ADC via I2C ?

I have the PicKit1 and the MCP3221 Pictail board that puts a direct connection between the RC0, RC1 and SCA SCL. I wanted to test out PicBasic I2C routines linking the 16F630 to the MCP3221.

Problem is that I do not seem to be getting any reading from the ADC. Can anyone suggest where I have gone wrong:
Code:
include "modedefs.bas"

' PIC Defines
' -----------

@ __config _INTRC_OSC_NOCLKOUT & _WDT_ON & _PWRTE_ON & _MCLRE_OFF & _BODEN & _CP_OFF & _CPD_OFF 

' PIC16F630 
' PIN NAME USE/CONNECTION
' 1  Vdd  +5VDC
' 2  RA.5 NC
' 3  RA.4 NC
' 4  RA.3 NC
' 5  RC.5 NC
' 6  RC.4 NC
' 7  RC.3 NC
' 8  RC.2 NC
' 9  RC.1 SCL
' 10 RC.0 SCA
' 11 RA.2 NC
' 12 RA.1 LED1 K, LED2 A
' 13 RA.0 LED1 A, LED2 K
' 14 Vss GND

Define OSCCAL_1K 1 	' Set OSCCAL for 1K
DEFINE OSC 4		' 4 MHz OSC


CMCON       =     7        ' PortA = digital I/O
VRCON       =     0        ' Voltage reference disabled
TRISA       =     %00000000' PortA.0-4 = outputs
TRISC       =     %00000001' PortC.1-5 = outputs PORTC.0 = input

SDA var PORTC.0
SCL var PORTC.1

B0      var     byte
B1      var     byte
B2      var     byte
cont con %10011011
loop:
   
    I2CREAD SDA,SCL,cont,[B1,B2]        'Read 2 locations in a row
if B1 > 2 then
	HIGH PORTA.1
	LOW PORTA.2
ELSE
	LOW PORTA.1
	HIGH PORTA.2
Endif

PAUSE 500
        Goto loop  ' Go back to loop and blink LED forever
        End

'goto loop
Thanks,

Rod