2e101a8e44
extmod/modonewire: Improve write timings for better reliability.
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When using long cables for sensors on onewire e.g. ds18b20, the current
default timings are too optimistic, leading to bus failures and CRC errors.
Stable results are achieved with the timings given by
https://www.analog.com/en/technical-articles/1wire-communication-through-software.html
2023-12-15 17:08:09 +11:00
06df3b2925
extmod/modonewire: Adopt Maxim recommended read timings.
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The timing of the onewire module was way too fast when reading. This
commit adopts read timings as recommended in Maxim application note 126:
6 us (pulse) / 9 us (sample) / 55 us (bit slot). See also:
https://www.analog.com/en/technical-articles/1wire-communication-through-software.html
Signed-off-by: Damien George <damien@micropython.org>
2023-12-15 17:04:33 +11:00
efe23aca71
all: Remove third argument to MP_REGISTER_MODULE.
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It's no longer needed because this macro is now processed after
preprocessing the source code via cpp (in the qstr extraction stage), which
means unused MP_REGISTER_MODULE's are filtered out by the preprocessor.
Signed-off-by: Damien George <damien@micropython.org>
2022-06-02 16:31:37 +10:00
bb794f05b7
extmod: Make port-included extmod modules use MP_REGISTER_MODULES.
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_onewire, socket, and network were previously added by the port rather
than objmodule.c.
Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
2022-05-18 20:49:12 +10:00
d41f6dde56
extmod/modonewire: Make _onewire module configurable via macro option.
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Signed-off-by: Damien George <damien@micropython.org>
2021-09-02 13:11:23 +10:00
ec0503bd0c
extmod/modonewire: Use pin_od_high/pin_od_low instead of pin_write.
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The pin is configured in open-drain mode so these od_high/od_low methods
should be used.
Signed-off-by: Damien George <damien@micropython.org>
2021-01-29 23:57:10 +11:00
69661f3343
all: Reformat C and Python source code with tools/codeformat.py.
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This is run with uncrustify 0.70.1, and black 19.10b0.
2020-02-28 10:33:03 +11:00
4904663748
extmod/modonewire: Fix reset timings to match 1-wire specs.
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Fixes issue #4116 .
2018-10-17 15:52:07 +11:00
f2140f9446
extmod/mod{lwip,onewire,webrepl}: Convert to mp_rom_map_elem_t.
2017-07-29 18:24:16 +03:00
eeaab1897b
extmmod/modonewire: Rename public module to mp_module_onewire.
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This follows naming scheme of other modules in extmod.
2017-06-22 16:17:46 +10:00
6cc4da4cb8
extmod: Move modonewire.c from esp8266 to extmod directory.
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It's now generic enough to be used by any port.
2017-06-22 16:06:00 +10:00
Elias Wimmer
Patrick Van Oosterwijck
Damien George
Jim Mussared
Damien George
Paul Sokolovsky