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Description
Port, board and/or hardware
Raspberry Pi Pico W and Raspberry Pi Pico 2 W
MicroPython version
All versions since v1.24.0 (including latest v1.25.0-preview.172.g5d12df51f)
Reproduction
- Copy code below to Pico and name it "main.py"
- Reset the Pico and allow the code to complete (approx 5 seconds). No repl needed as the code writes a log file to the flash storage
- Connect the Pico to the USB port and inspect the file "local.log" on the Pico
Code used to test:
import machine, os, timeSLEEP_MS = const(2000)def write_log(s: str) -> None: dt = machine.RTC().datetime() log_text = "[RTC={6:02d}:{7:02d}:{8:02d} ticks={0:d}] {1:s}".format(time.ticks_ms(), s, *dt) with open("local.log", "a") as file: file.write(log_text + "\n")def safe_sleep(ms: int) -> int: begin = time.ticks_ms() wake = -1 sleep = ms while sleep > 0: machine.lightsleep(sleep) wake += 1 sleep = ms - time.ticks_diff(time.ticks_ms(), begin) return wakewrite_log(f"Machine = '{os.uname()[4]}'")write_log(f"Version = '{os.uname()[3]}'")time.sleep_ms(SLEEP_MS)write_log(f"After time.sleep_ms({SLEEP_MS})")wakeups = safe_sleep(SLEEP_MS)write_log(f"After safe_sleep({SLEEP_MS}) with {wakeups} early wakeups")Expected behaviour
The real time clock should advance by 2 seconds after running 'machine.lightsleep(2000)' like it was on micropython versions up to and including 1.23.0. Example output from1.23.0:
[RTC=00:00:01 ticks=49] Machine = 'Raspberry Pi Pico W with RP2040'[RTC=00:00:01 ticks=54] Version = 'v1.23.0 on 2024-06-02 (GNU 13.2.0 MinSizeRel)'[RTC=00:00:03 ticks=2058] After time.sleep_ms(2000)[RTC=00:00:05 ticks=4065] After safe_sleep(2000) with 0 early wakeupsObserved behaviour
The real time clock does not advance during machine.lightsleep(2000) as shown in the output below running on1.24.0:
[RTC=00:00:01 ticks=36] Machine = 'Raspberry Pi Pico W with RP2040'[RTC=00:00:01 ticks=41] Version = 'v1.24.0 on 2024-10-25 (GNU 13.2.0 MinSizeRel)'[RTC=00:00:03 ticks=2044] After time.sleep_ms(2000)[RTC=00:00:03 ticks=4049] After safe_sleep(2000) with 31 early wakeupsAdditional Information
While machine.RTC().datetime() does not advance during machine.lightsleep(),time.ticks_ms advances as expected.
The funtion "safe_sleep()" was used to encapsulate calls to machine.lightsleep() because machine.lightsleep() returns after ~64ms. SeeIssue #15622 andIssue #16181
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