Commit Graph

6 Commits

Author SHA1 Message Date
Damien George 5954387858 drivers/onewire/ds18x20.py: Add support for DS1822 sensor.
DS1822P sensors behave just like the DS18B20 except for the following:
- it has a different family code: 0x22
- it has only the GND and DQ pins connected, it uses parasitic power from
  the data line

Contributed by @nebelgrau77.
2019-10-16 14:28:13 +11:00
Damien George a065d78675 drivers/onewire: Move onewire.py, ds18x20.py from esp8266 to drivers.
These drivers can now be used by any port (so long as that port has the
_onewire driver from extmod/modonewire.c).

These drivers replace the existing 1-wire and DS18X20 drivers in the
drivers/onewire directory.  The existing ones were pyboard-specific and
not very efficient nor minimal (although the 1-wire driver was written in
pure Python it only worked at large enough CPU frequency).

This commit brings backwards incompatible API changes to the existing
1-wire drivers.  User code should be converted to use the new drivers, or
check out the old version of the code and keep a local copy (it should
continue to work unchanged).
2017-06-22 16:28:07 +10:00
Paul Sokolovsky 1c9ee49756 drivers: Replace deprecated Pin.high()/low() methods with .__call__(1/0). 2017-05-21 17:44:58 +03:00
syndycat b2611d6be3 drivers/onewire/ds18x20: Fix negative temperature calc for DS18B20. 2017-01-08 19:26:22 +11:00
Damien George a95b06fc6b drivers/onewire: Fix ds18x20.read_temp so it works when no rom given. 2015-07-30 23:10:39 +01:00
Damien George 9be0d599cd drivers: Add onewire driver and ds18x20 temperature sensor driver. 2015-03-03 01:29:52 +00:00