The current `esp32.RMT` class uses a legacy API from ESP-IDF 4.x. The
ESP-IDF 5.x offers a new API, which is overall better, and easier to
implement the RX side in the future. This commit updates the module and
the documentation, preserving the current MicroPython RMT API as much as
possible.
The bitstream RMT implementation was updated as well, since ESP-IDF does
not allow firmware to reference legacy and new APIs at the same time (it
resets right after boot with an error message, even if neither module is
imported).
The documentation is updated accordingly.
Signed-off-by: Elvis Pfutzenreuter <elvis.pfutzenreuter@gmail.com>
Add a new `esp32.PCNT` class that provides complete, low-level support to
the ESP32 PCNT pulse counting hardware units.
This can be used as a building block to implement the higher-level
`machine.Counter` and `machine.Encoder` classes.
This is enabled by default on all OG, S2, S3, C6 boards, but not on C3 (as
the PCNT peripheral is not supported).
Original implementation by: Jonathan Hogg <me@jonathanhogg.com>
Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
Signed-off-by: Angus Gratton <angus@redyak.com.au>
On ESP32 S2/S3 variants, GPIO0 through GPIO21 are valid RTC pins. This
commit defines the valid RTC_VALID_EXT_PINS for the S2/S3 variants,
otherwise, it keeps functionality the same.
The bit-bang implementation was replaced with the RMT implementation in
599b61c086. This commit brings back that
bit-bang code, and allows it to be selected via the new static method:
esp32.RMT.bitstream_channel(None)
The bit-bang implementation may be useful if the RMT needs to be used for
something else, or if bit-banging is more stable in certain applications.
Signed-off-by: Damien George <damien@micropython.org>
MicroPython currently runs on core 0 of the esp32. Calling
rmt_driver_install will mean that the RMT interrupt handler is also
serviced on core 0. This can lead to glitches in the RMT output if
WiFi is enabled (for esp32.RMT and machine.bitstream).
This patch calls rmt_driver_install on core 1, ensuring that the RMT
interrupt handler is serviced on core 1. This prevents glitches.
Fixes issue #8161.
Signed-off-by: Damien George <damien@micropython.org>
This commit implements basic NVS support for the esp32. It follows the
pattern of the esp32.Partition class and exposes an NVS object per NVS
namespace. The initial support provided is only for signed 32-bit integers
and binary blobs. It's easy (albeit a bit tedious) to add support for
more types.
See discussions in: #4436, #4707, #6780
