def read_values(self):
"""
читаем данные с контроллера
"""
if self.state == OFF:
return
try:
values = i2c.read(settings.I2C_READ_BYTES_COUNT)
except IOError:
self.set_state(OFF)
return
else:
self.set_state(ON)
if values[:2] != [97, 116]:
return
return [
# время актуальности
int(time()),
# батарея
values[2] * 256 + values[3],
# температура
values[4] * 256 + values[5],
# фото
values[6] * 256 + values[7]
]
def publish(self):
data = i2c.read(2)
topic = 'pressure/'+self.name
data = int.from_bytes(data,byteorder='big', signed=True)
print(str(topic)+ " : " +str(data) + " : " + self.hostname)
infot = publish.single(topic, data, qos=2, hostname = self.hostname)
return infot
def ADS1115_GetVal():
i2c.open(ADS1115_ADDRESS)
i2c.write([0x00])
(MSB, LSB) = i2c.read(2)
i2c.close()
Vel = (MSB << 8) + LSB
if (Vel > 32767):
Vel = 0
return Vel
def readBmp180Id(addr=DEVICE): #Slave Device adress i2c.open(addr) # Register Address REG_ID=0xD0 #Set address at 0xD0 register i2c.write( [REG_ID] ) ( chip_id, chip_version ) = i2c.read(2) i2c.close() return (chip_id, chip_version)
def ReadBlock(self, address, key, value):
"""Reads a block from olimex mod-io.
Args:
key: interger, an address where to read data from.
length: integer, how much data to read.
"""
try:
i2c.open(address)
i2c.write(key)
value = i2c.read(value)
i2c.close()
return value
except IOError:
raise DeviceNotFoundException("Could not communicate with device")
def ReadADC(Address, channel, ref):
config = 0b1000000111000011
config |= (channel << 12)
config |= (ref << 9)
lectura = 0
aux = 0x80
configH = (config >> 8)
configL = config & 0x00FF
i2c.init("/dev/i2c-0")
i2c.open(Address) #Open ADC I2C
i2c.write([0x01, configH, configL]) #Write to Adddress 1 (config register)
i2c.close()
while (lectura != aux):
i2c.open(Address)
high = i2c.read(2)
i2c.close()
lectura = high[0] & aux
i2c.open(Address)
i2c.write([0x00])
i2c.close()
i2c.open(Address)
read = i2c.read(2)
i2c.close()
value = (read[0] << 8) + read[1]
return value
def ReadBlock(self, address, key, value):
"""Reads a block from olimex mod-io.
Args:
key: interger, an address where to read data from.
length: integer, how much data to read.
"""
try:
i2c.open(address)
i2c.write(key)
value = i2c.read(value)
i2c.close()
return value
except IOError:
raise DeviceNotFoundException("Could not communicate with device")
def readBmp180(addr=DEVICE):
#Slave Device adress
i2c.open(addr)
# Register Addresses
REG_CALIB = 0xAA
REG_MEAS = 0xF4
REG_MSB = 0xF6
REG_LSB = 0xF7
# Control Register Address
CRV_TEMP = 0x2E
CRV_PRES = 0x34
# Oversample setting
OVERSAMPLE = 0 # 0 - 3
# Read calibration data
# Read calibration data from EEPROM
i2c.write([REG_CALIB])
cal = i2c.read(22)
# Convert byte data to word values
AC1 = getShort(cal, 0)
AC2 = getShort(cal, 2)
AC3 = getShort(cal, 4)
AC4 = getUshort(cal, 6)
AC5 = getUshort(cal, 8)
AC6 = getUshort(cal, 10)
B1 = getShort(cal, 12)
B2 = getShort(cal, 14)
MB = getShort(cal, 16)
MC = getShort(cal, 18)
MD = getShort(cal, 20)
print("AC1:",AC1)
print("AC2:",AC2)
print("AC3:",AC3)
print("AC4:",AC4)
print("AC5:",AC5)
print("AC6:",AC6)
print("B1:",B1)
print("B2:",B2)
print("MB:",MB)
print("MC:",MC)
print("MD",MD)
# Read temperature
i2c.write( [REG_MEAS, CRV_TEMP] )
time.sleep(0.015)
i2c.write([0xF6])
( msb, lsb ) = i2c.read( 2 )
UT = (msb << 8) + lsb
print("msb,lsb",msb,lsb)
print("UT",UT)
# Read pressure
i2c.write([REG_MEAS, CRV_PRES + (OVERSAMPLE << 6)])
time.sleep(0.14)
i2c.write([REG_MSB])
(msb, lsb, xsb) = i2c.read(3)
i2c.close()
print("msb,lsb,xsb",msb,lsb,xsb)
UP = ((msb << 16) + (lsb << 8) + xsb) >> (8 - OVERSAMPLE)
print("UP",UP)
# Refine temperature
X1 = ((UT - AC6) * AC5) >> 15
X2 = (MC << 11) / (X1 + MD)
B5 = X1 + X2
temperature = ( B5 + 8 ) >> 4
# Refine pressure
B6 = B5 - 4000
B62 = B6 * B6 >> 12
X1 = (B2 * B62) >> 11
X2 = AC2 * B6 >> 11
X3 = X1 + X2
B3 = (((AC1 * 4 + X3) << OVERSAMPLE) + 2) >> 2
X1 = AC3 * B6 >> 13
X2 = (B1 * B62) >> 16
X3 = ((X1 + X2) + 2) >> 2
B4 = (AC4 * (X3 + 32768)) >> 15
B7 = (UP - B3) * (50000 >> OVERSAMPLE)
P = (B7 * 2) / B4
X1 = ( P >> 8 ) * ( P >> 8 )
X1 = ( X1 * 3038 ) >> 16
X2 = ( -7357 * P ) >> 16
pressure = P + ( (X1 + X2 + 3791) >> 4 )
return ( temperature / 10.0, pressure/ 100.0 )
def read_byte_data(self, adr):
i2c.open(self.address)
i2c.write([adr])
res = i2c.read(1)[0]
i2c.close()
return res
i2c.write([0x00])
print "Dump eeprom:"
print "="*24
print " ",
for i in xrange(16):
print " %x" % i,
print "\t",
for i in xrange(16):
print "%x" % i,
print ""
"""Print data"""
for i in xrange(128):
page = i2c.read(16)
print "%03x:" % (i*0x10),
for j in xrange(0, 16):
print "%02x" % page[j],
"""Print characters"""
print "\t",
for j in xrange(16):
if page[j] <= 126 and page[j] >= 32:
print chr(page[j]),
else:
print '.',
print ""
i2c.close()
# Control Register Address CRV_TEMP = 0x2E CRV_PRES = 0x34 # Oversample setting OVERSAMPLE = 0 # 0 - 3 # Read calibration data # Read calibration data from EEPROM <<<<<<< HEAD i2c.open(addr) #Slave Device adress time.sleep(0.05) i2c.write([REG_CALIB]) cal = i2c.read(22) time.sleep(0.05) #cal = bus.read_i2c_block_data(addr, REG_CALIB, 22) ======= i2c.write([REG_CALIB]) cal = i2c.read(22) >>>>>>> 2066dfbee270812bf435b6e815ff896003e6ccf1 # Convert byte data to word values AC1 = getShort(cal, 0) AC2 = getShort(cal, 2) AC3 = getShort(cal, 4) AC4 = getUshort(cal, 6) AC5 = getUshort(cal, 8) AC6 = getUshort(cal, 10)
i2c.open(eeprom_address)
"""Set address pointer to the first"""
i2c.write([0x00])
print "Dump eeprom:"
print "=" * 24
print " ",
for i in xrange(16):
print " %x" % i,
print "\t",
for i in xrange(16):
print "%x" % i,
print ""
"""Print data"""
for i in xrange(128):
page = i2c.read(16)
print "%03x:" % (i * 0x10),
for j in xrange(0, 16):
print "%02x" % page[j],
"""Print characters"""
print "\t",
for j in xrange(16):
if page[j] <= 126 and page[j] >= 32:
print chr(page[j]),
else:
print '.',
print ""
i2c.close()
#!/usr/bin/env python
from pyA20 import i2c
i2c.init("/dev/i2c-0") #Initialize module to use /dev/i2c-0
res = i2c.open(0x20) #The slave device address is 0x2A
i2c.write([0x21]) #Set address at 0x21 ADCL register
value = i2c.read(1) #Read 1 byte
valueL=[hex(x) for x in value]
i2c.write([0x20]) #Set address at 0x20 ADCH register
value = i2c.read(1) #Read 1
valueH=[int(x) for x in value]
total=int(valueL[0],16)+(valueH[0]<<8)
voltage=(total+3.737611)/76.250833
percentage=round((100*(voltage-10.4))/2.2)
percentage=100 if percentage>100 else percentage
percentage=0 if percentage<0 else percentage
print str(percentage)
i2c.close() #End communication with slave device