def main():
device = atlas_i2c() # creates the I2C port object, specify the address or bus if necessary
print(">> Atlas Scientific sample code")
print(">> Any commands entered are passed to the board via I2C except:")
print(">> Address,xx changes the I2C address the Raspberry Pi communicates with.")
print(">> Poll,xx.x command continuously polls the board every xx.x seconds")
print(" where xx.x is longer than the %0.2f second timeout." % atlas_i2c.long_timeout)
print(" Pressing ctrl-c will stop the polling")
# main loop
while True:
input = raw_input("Enter command: ")
# address command lets you change which address the Raspberry Pi will poll
if(input.upper().startswith("ADDRESS")):
addr = int(string.split(input, ',')[1])
device.set_i2c_address(addr)
print("I2C address set to " + str(addr))
# contiuous polling command automatically polls the board
elif(input.upper().startswith("POLL")):
delaytime = float(string.split(input, ',')[1])
# check for polling time being too short, change it to the minimum timeout if too short
if(delaytime < atlas_i2c.long_timeout):
print("Polling time is shorter than timeout, setting polling time to %0.2f" % atlas_i2c.long_timeout)
delaytime = atlas_i2c.long_timeout
# get the information of the board you're polling
info = string.split(device.query("I"), ",")[1]
print("Polling %s sensor every %0.2f seconds, press ctrl-c to stop polling" % (info, delaytime))
try:
while True:
print(device.query("R"))
time.sleep(delaytime - atlas_i2c.long_timeout)
except KeyboardInterrupt: # catches the ctrl-c command, which breaks the loop above
print("Continuous polling stopped")
# if not a special keyword, pass commands straight to board
else:
try:
print(device.query(input))
except IOError:
print("Query failed")
def __init__(self):
self.device = atlas_i2c(101)
