tmp36Test

import spidev
import time

spi = spidev.SpiDev()
spi.open(0,0)

def readadc(adcnum):
        if adcnum > 3 or adcnum <0:
                return -1
        r = spi.xfer2([1,8+adcnum << 4,0])
        adcout = ((r[1]&3)<<8)+r[2]
        return adcout

while True:
        tempAdcVal = readadc(0)
        volts = ((tempAdcVal*3.3)/1024.0)
        temp = (volts-0.5)*100
        print ("%4d/1023 => %5.3f V => %2.0f C" %(tempAdcVal,volts,round(temp)))
        time.sleep(1)