What is the time granularity in Pys60?

[ericliquid]

time.time() only give me second.
Is it possible to get millisecond from anywhere?
Thanks a lot

[bergerc]

time.time() only give me second.
Is it possible to get millisecond from anywhere?
Thanks a lot

Hi,

I had the same problem, I used a little C++ code compiled as a Python module to get more precise time. But I don't know how accurate it is; if Python does not return more precise time it *may* not be enough accurate to return valid data (Has anyone more informations?)

Code available in this file : https://air.mosomuso.com/pubhg/pyext...p;style=gitweb

Regards,

[aaaaapo]

time.time() only give me second.
Is it possible to get millisecond from anywhere?

Try time.clock(). It returns seconds since last reboot with some decimals.

help(time.clock) says:

Return the CPU time or real time since the start of the process or since the first call to clock(). This has as much precision as the system records.

I don't know how much precision Symbian system has.

[cyke64]

hello ,

You can find more info here

miso module provide a nice tick count function :

import miso,e32

print miso.tick_count()
e32.ao_sleep(1)
print miso.tick_count()
e32.ao_sleep(1)
print miso.tick_count()

Cyke64

[cyke64]

hello again ,

I have tried this snippet with miso.tick_count() and found that precision is only 1/64 sec on a E61 (3rd edition)

Try it yourself :

import miso,e32

b=miso.tick_count()
e=miso.tick_count()
print e-b
print miso.tick_count()
print miso.tick_count()


print miso.tick_count()
e32.ao_sleep(1)
print miso.tick_count()
e32.ao_sleep(1)
print miso.tick_count()

b1=miso.tick_count()
e32.ao_sleep(1)
e1=miso.tick_count()
e32.ao_sleep(1)
e2=miso.tick_count()


print e1-b1
print e2-e1

Cyke64

[cyke64]

Hi,

I had the same problem, I used a little C++ code compiled as a Python module to get more precise time. But I don't know how accurate it is; if Python does not return more precise time it *may* not be enough accurate to return valid data (Has anyone more informations?)

Code available in this file : https://air.mosomuso.com/pubhg/pyext...p;style=gitweb

Regards,

hello ,

I try your phone_time() function with the same snippet it seems more precise than miso (1/64 sec) !

import gps_location,e32

def format_time(time):
  return int("%2d%2d%6d"%(time[4],time[5],time[6]))

b=format_time(gps_location.phone_time())
e=format_time(gps_location.phone_time())
print e-b
print gps_location.phone_time()[6]
print gps_location.phone_time()[6]


print format_time(gps_location.phone_time())
e32.ao_sleep(1)
print format_time(gps_location.phone_time())
e32.ao_sleep(1)
print format_time(gps_location.phone_time())

b1=format_time(gps_location.phone_time())
e32.ao_sleep(1)
e1=format_time(gps_location.phone_time())
e32.ao_sleep(1)
e2=format_time(gps_location.phone_time())


print e1-b1
print e2-e1

[hyon]

Is this really the only way to get more granularity - to use C++ code?

[aya42]

Is this really the only way to get more granularity - to use C++ code?

What was wrong with aaaaapo's suggestion of using time.clock()? It's as accurate as you can get from the hardware. On my device it seems to provide accuracy to the nearest millisecond.

I use code like this in AyIX:

import time

# Run this once when your program starts
CLOCK_OFFSET = int(round(time.time())) - int(round(time.clock()))

# Call this to return UNIX timestamp to nearest millisecond
def getTime():
    return time.clock() + CLOCK_OFFSET

[hyon]

What was wrong with aaaaapo's suggestion of using time.clock()? It's as accurate as you can get from the hardware. On my device it seems to provide accuracy to the nearest millisecond.

I use code like this in AyIX:

import time

# Run this once when your program starts
CLOCK_OFFSET = int(round(time.time())) - int(round(time.clock()))

# Call this to return UNIX timestamp to nearest millisecond
def getTime():
    return time.clock() + CLOCK_OFFSET

That solved my problem. Thank you!