class PT100(Sensor):
def __init__(self):
self.val = None
self.tempList = []
self.spi = SPI(0, 0)
self.spi.msh = 1000000
GPIO.setup(CS_PIN, GPIO.OUT)
GPIO.output(CS_PIN, GPIO.HIGH)
self.inter = Interpolate(x, y)
def spi_read(self):
GPIO.output(CS_PIN, GPIO.LOW)
self.spi.xfer([REG_CONF, CNF_ONESHOT])
GPIO.output(CS_PIN, GPIO.HIGH)
time.sleep(0.1)
GPIO.output(CS_PIN, GPIO.LOW)
self.spi.xfer([REG_LSB])
lsb = self.spi.readbytes(1)
GPIO.output(CS_PIN, GPIO.HIGH)
GPIO.output(CS_PIN, GPIO.LOW)
self.spi.xfer([REG_MSB])
msb = self.spi.readbytes(1)
GPIO.output(CS_PIN, GPIO.HIGH)
err = (False, True)[lsb[0] & 1]
adc = (msb[0] << 8 | lsb[0]) >> 1
return (err, adc)
def update(self):
value = 0
err = False
for i in range(10):
err, adc = self.spi_read()
if err:
break
value = value + adc
if err:
#self.val=None
return
value = value / 10.
res = (value / 2**15 * 400)
self.tempList.append(self.inter(res))
if len(self.tempList) > 5:
del self.tempList[0]
tSum = 0
for t in self.tempList:
tSum = tSum + t
self.val = tSum / len(self.tempList)
#import Adafruit_BBIO.SPI as SPI from Adafruit_BBIO.SPI import SPI spi = SPI(0, 0) print(spi.xfer([0x01, 0x00])) print(spi.xfer([0x02, 0xFF]))
CNF_ONESHOT = 0b10100011
CNF_IDLE = 0b00000011
if __name__ == '__main__':
spi = SPI(0, 0)
spi.msh=1000000
GPIO.setup(CS_PIN,GPIO.OUT)
GPIO.output(CS_PIN,GPIO.HIGH)
inter=Interpolate(x,y)
while True:
GPIO.output(CS_PIN,GPIO.LOW)
spi.xfer([REG_CONF,CNF_ONESHOT])
GPIO.output(CS_PIN,GPIO.HIGH)
time.sleep(0.1)
GPIO.output(CS_PIN,GPIO.LOW)
spi.xfer([0x02])
lsb=spi.readbytes(1)
GPIO.output(CS_PIN,GPIO.HIGH)
GPIO.output(CS_PIN,GPIO.LOW)
spi.xfer([0x01])
msb=spi.readbytes(1)
GPIO.output(CS_PIN,GPIO.HIGH)
GPIO.output(CS_PIN,GPIO.LOW)
from Adafruit_BBIO.SPI import SPI
import struct
import time
spi = SPI(0,0)
spi.mode = 1
spi.msh = 300000
spi.xfer([0b00011000, 0x02])
def decode_sent_command(ser_cmd):
cmd_bits = (ser_cmd & (((1<<6) - 1)<<10))>>10
data_bits = ser_cmd & ((1<<10)-1)
return bin(cmd_bits)[2:], data_bits
def send_cmd(cmd,data):
ser_cmd = (cmd << 10) | (data & ((1<<10)-1))
w0 = ser_cmd >> 8
w1 = ser_cmd & ((1<<8)-1)
return [w0, w1]
# write to RDAC
spi.xfer(list(struct.unpack('BB', struct.pack('>H', 1 << 10 | 0))))
# read RDAC
spi.xfer(list(struct.unpack('BB', struct.pack('>H', 0b10 << 10 | 0))))
# read Control register
spi.xfer(list(struct.unpack('BB', struct.pack('>H', 0b111 << 10 | 0))))
spi.readbytes(2)
from Adafruit_BBIO.SPI import SPI import Adafruit_BBIO.GPIO as GPIO spi = SPI(1,0) #Send something print(spi.xfer([0x41])) #print(spi.xfer2([32, 11, 110, 22, 220])) #print(spi.xfer2([0x41])) #print(spi.xfer([32, 11, 110, 22, 220])) spi.close() #Only need to execute one of the following lines: #spi = SPI(bus, device) #/dev/spidev<bus>.<device> #spi = SPI(0,0) #/dev/spidev1.0 #spi = SPI(0,1) #/dev/spidev1.1 #spi = SPI(1,0) #/dev/spidev2.0 #spi = SPI(1,1) #/dev/spidev2.1
