Commit Graph

4 Commits

Author SHA1 Message Date
Damien George
683df1c8d5 drivers/onewire: Enable pull-up when init'ing the 1-wire pin.
A previous version of the 1-wire driver (which was recently replaced by the
current one) had this behaviour and it allows to create a 1-wire bus
without any external pull-up resistors.
2017-06-26 17:48:05 +10:00
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
Dave Hylands
3c84197f17 drivers/onewire: Enable pull up on data pin.
The driver seems to be be enabling the pullup resistor in most places, but
not this one. Making this one little change allows onewire devices to be
used with no external pullup resistor.
2017-01-03 17:19:22 +11:00
Damien George
9be0d599cd drivers: Add onewire driver and ds18x20 temperature sensor driver. 2015-03-03 01:29:52 +00:00