x[0] = val & 0xFF
return x
def array_to_int(x):
# convert a four byte array into an integer
val = (x[0]<<24) + (x[1]<<16) + (x[2]<<8) + x[3]
return val
# create an instance of the helper class and create an i2c bus object
i2c_helper = ABEHelpers()
bus = i2c_helper.get_smbus()
# create a new instance of the RTC class
rtc = RTC(bus)
# integer to be written to the RTC memory
writeval = 176247
# convert the integer into an array of bytes
writearray = int_to_array(writeval)
# write the array to the RTC memory
rtc.write_memory(0x08, writearray)
# read four bytes from the RTC memory into an array
read_array = rtc.read_memory(0x08, 4)
# print the individual array values
print (read_array[0], read_array[1], read_array[2], read_array[3])
#!/usr/bin/python from ABE_RTCPi import RTC from ABE_helpers import ABEHelpers import time """ ================================================ ABElectronics RTC Pi real-time clock | RTC clock output demo Version 1.0 Created 19/05/2014 Version 1.1 16/11/2014 updated code and functions to PEP8 format run with: python demo-rtcout.py ================================================ This demo shows how to enable the clock square wave output on the RTC Pi and set the frequency """ i2c_helper = ABEHelpers() bus = i2c_helper.get_smbus() rtc = RTC(bus) # create a new instance of the RTC class # set the frequency of the output square-wave, options are: 1 = 1Hz, 2 = # 4.096KHz, 3 = 8.192KHz, 4 = 32.768KHz rtc.set_frequency(3) rtc.enable_output() # enable the square-wave
x[i] = buf[i]
return x
def array_to_double(val):
# convert an eight byte array into a double
dval, = struct.unpack('d', bytearray(val))
return (dval)
# create an instance of the helper class and create an i2c bus object
i2c_helper = ABEHelpers()
bus = i2c_helper.get_smbus()
# create a new instance of the RTC class
rtc = RTC(bus)
# number to be written to the RTC memory
value = 0.0005
# convert the number into an array of bytes
writearray = double_to_array(value)
# write the array to the RTC memory
rtc.write_memory(0x08, writearray)
# read eight bytes from the RTC memory into an array
read_array = rtc.read_memory(0x08, 8)
# combine the array values into an number and print it
print(array_to_double(read_array))
#!/usr/bin/python3
from ABE_RTCPi import RTC
from ABE_helpers import ABEHelpers
import time
"""
================================================
ABElectronics RTC Pi real-time clock | Set Time Demo
Version 1.0 Created 29/02/2015
Requires python 3 smbus to be installed
run with: python3 demo-rtcsettime.py
================================================
This demo shows how to set the time on the RTC Pi and then read the
current time at 1 second intervals
"""
i2c_helper = ABEHelpers()
bus = i2c_helper.get_smbus()
rtc = RTC(bus) # create a new instance of the RTC class
# set the date using ISO 8601 format - YYYY-MM-DDTHH:MM:SS
rtc.set_date("2013-04-23T12:32:11")
while True:
# read the date from the RTC in ISO 8601 format and print it to the screen
print(rtc.read_date())
time.sleep(1) # wait 1 second
from ABE_RTCPi import RTC
from ABE_helpers import ABEHelpers
import time
"""
================================================
ABElectronics RTC Pi real-time clock | Set Time Demo
Version 1.0 Created 19/05/2014
Version 1.1 16/11/2014 updated code and functions to PEP8 format
run with: python demo-rtcsettime.py
================================================
This demo shows how to set the time on the RTC Pi and then read the
current time at 1 second intervals
"""
i2c_helper = ABEHelpers()
bus = i2c_helper.get_smbus()
rtc = RTC(bus) # create a new instance of the RTC class
# set the date using ISO 8601 format - YYYY-MM-DDTHH:MM:SS
rtc.set_date("2013-04-23T12:32:11")
while True:
# read the date from the RTC in ISO 8601 format and print it to the screen
print rtc.read_date()
time.sleep(1) # wait 1 second
#!/usr/bin/python3 from ABE_RTCPi import RTC from ABE_helpers import ABEHelpers import time """ ================================================ ABElectronics RTC Pi real-time clock | RTC clock output demo Version 1.0 Created 29/02/2015 Requires python 3 smbus to be installed run with: python3 demo-rtcout.py ================================================ This demo shows how to enable the clock square wave output on the RTC Pi and set the frequency """ i2c_helper = ABEHelpers() bus = i2c_helper.get_smbus() rtc = RTC(bus) # create a new instance of the RTC class # set the frequency of the output square-wave, options are: 1 = 1Hz, 2 = # 4.096KHz, 3 = 8.192KHz, 4 = 32.768KHz rtc.set_frequency(3) rtc.enable_output() # enable the square-wave