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creating virtual timer on MicroPython v1.25.0 on esp32 s3 fails #17203

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NilsBe opened this issue Apr 28, 2025 · 2 comments
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creating virtual timer on MicroPython v1.25.0 on esp32 s3 fails #17203

NilsBe opened this issue Apr 28, 2025 · 2 comments
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@NilsBe
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NilsBe commented Apr 28, 2025

Port, board and/or hardware

esp32 s3

MicroPython version

MicroPython v1.25.0 on 2025-04-15; Generic ESP32S3 module with ESP32S3

Reproduction

import machine
t = machine.Timer(-1)

Expected behaviour

no error on MicroPython v1.24.1 on 2024-11-29; Generic ESP32S3 module with ESP32S3

Observed behaviour

Traceback (most recent call last):
File "", line 1, in
ValueError: invalid Timer number

Additional Information

No, I've provided everything above.

Code of Conduct

Yes, I agree
@NilsBe NilsBe added the bug label Apr 28, 2025
@robert-hh
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As far as I can tell from going back the versions, there was not Softtimer support in V1.24.1 for ESP32. The supported times is and was a hard timer. Only the argument value check was improved in V1.25 to only accept values between 0 and <number_of_timers - 1>. For the ESP32S3 its 0-3.
With 1.24.1 and below, a timer number of -1 would result in using timer 3.
See the definitions from the esp-idf below:

~/Downloads/esp-idf/components/soc/esp32/include/soc/soc_caps.h:
  316: #define SOC_TIMER_GROUP_TOTAL_TIMERS      (4)
~/Downloads/esp-idf/components/soc/esp32c2/include/soc/soc_caps.h:
  266: #define SOC_TIMER_GROUP_TOTAL_TIMERS      (1U)
~/Downloads/esp-idf/components/soc/esp32c3/include/soc/soc_caps.h:
  352: #define SOC_TIMER_GROUP_TOTAL_TIMERS      (2)
~/Downloads/esp-idf/components/soc/esp32c6/include/soc/soc_caps.h:
  429: #define SOC_TIMER_GROUP_TOTAL_TIMERS      (2)
~/Downloads/esp-idf/components/soc/esp32h2/include/soc/soc_caps.h:
  424: #define SOC_TIMER_GROUP_TOTAL_TIMERS      (2)
~/Downloads/esp-idf/components/soc/esp32p4/include/soc/soc_caps.h:
  458: #define SOC_TIMER_GROUP_TOTAL_TIMERS      4
~/Downloads/esp-idf/components/soc/esp32s2/include/soc/soc_caps.h:
  323: #define SOC_TIMER_GROUP_TOTAL_TIMERS      (4)
~/Downloads/esp-idf/components/soc/esp32s3/include/soc/soc_caps.h:
  359: #define SOC_TIMER_GROUP_TOTAL_TIMERS      (4)

@NilsBe
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NilsBe commented Apr 28, 2025

I always thought I would use a virtual timer with -1. :-)
Thanks for your answer.
I am now trying to figure out where I could have learned that there is no virtual timer on esp32 s3 (or is it on all esp32?)

Kind regards

@NilsBe NilsBe closed this as completed Apr 28, 2025
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