Commit Graph

6 Commits

Author SHA1 Message Date
Trammell hudson 96a2cc5e13 esp8266/machine_pwm: Enable real open drain output on pin driven by PWM.
The PWM module now detects if the pin is open drain and if so switches it
to hardware open drain before starting the PWM.

The code that was explicitly turning off the open drain output during PWM
is also removed.

Together these changes allow driving external transistor high-current
switches with PWM.

Signed-off-by: Trammell hudson <hudson@trmm.net>
2022-11-15 12:51:32 +11:00
Damien George af64c2ddbd extmod/machine_pwm: Factor out machine.PWM bindings to common code.
This commit refactors machine.PWM and creates extmod/machine_pwm.c.  The
esp8266, esp32 and rp2 ports all use this and provide implementations of
the required PWM functionality.  This helps to reduce code duplication and
keep the same Python API across ports.

This commit does not make any functional changes.

Signed-off-by: Damien George <damien@micropython.org>
2021-09-04 16:31:17 +10:00
Damien George 8f20cdc353 all: Rename absolute time-based functions to include "epoch".
For time-based functions that work with absolute time there is the need for
an Epoch, to set the zero-point at which the absolute time starts counting.
Such functions include time.time() and filesystem stat return values.  And
different ports may use a different Epoch.

To make it clearer what functions use the Epoch (whatever it may be), and
make the ports more consistent with their use of the Epoch, this commit
renames all Epoch related functions to include the word "epoch" in their
name (and remove references to "2000").

Along with this rename, the following things have changed:

- mp_hal_time_ns() is now specified to return the number of nanoseconds
  since the Epoch, rather than since 1970 (but since this is an internal
  function it doesn't change anything for the user).

- littlefs timestamps on the esp8266 have been fixed (they were previously
  off by 30 years in nanoseconds).

Otherwise, there is no functional change made by this commit.

Signed-off-by: Damien George <damien@micropython.org>
2020-09-18 17:20:34 +10:00
Damien George e12de1fd9d esp8266: Clean up Pin intr handler by moving all code to machine_pin.c.
The macro MP_FASTCODE is used to explicitly place required functions in
iRAM, instead of needing a separate .c file.
2020-05-08 23:40:22 +10:00
Damien George 625609a737 esp8266/machine_adc: Rename pyb_adc_* to machine_adc_*. 2019-09-04 16:17:10 +10:00
Damien George 01dd7804b8 ports: Make new ports/ sub-directory and move all ports there.
This is to keep the top-level directory clean, to make it clear what is
core and what is a port, and to allow the repository to grow with new ports
in a sustainable way.
2017-09-06 13:40:51 +10:00