Commit Graph

17 Commits

Author SHA1 Message Date
Damien George 1f04a9a1fc esp32/esp32_rmt: Select correct last RMT channel on S2, S3, C3 variants.
For example the ESP32-C3 has 2 TX channels and 2 RX channels in total, and
in this case channel 1 must be the default for bitstream.

Signed-off-by: Damien George <damien@micropython.org>
2022-02-01 16:58:56 +11:00
Damien George 648656dbbd esp32/esp32_rmt: Call rmt_driver_install directly if running on core 1.
Signed-off-by: Damien George <damien@micropython.org>
2022-01-22 00:11:14 +11:00
Damien George a3bbd5332b esp32/machine_bitstream: Reinstate bitstream bit-bang implementation.
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>
2022-01-14 16:40:01 +11:00
Damien George e754c2e84f esp32/esp32_rmt: Install RMT driver on core 1.
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>
2022-01-14 15:41:59 +11:00
Jim Mussared 599b61c086 esp32/machine_bitstream: Replace bit-bang code with RMT-based driver.
This aims to solve glitching issues on long neopixel strips.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
2021-12-22 12:04:13 +11:00
Jonathan Hogg 18e48a71ee esp32/esp32_rmt: Enhance RMT with idle_level and write_pulses modes.
This change allows specification of the idle level and TX carrier output
level (through changed initialisation API), and more flexible specification
of pulses for write_pulses.

This is a breaking change for the esp32.RMT constructor API.  Previous code
of this form:

    esp32.RMT(..., carrier_duty_percent=D, carrier_freq=F)

will now raise an exception and should be changed to:

    esp32.RMT(..., tx_carrier=(F, D, 1))
2021-07-01 13:39:39 +10:00
Jonathan Hogg 30422ca7c2 esp32/esp32_rmt: Fix RMT looping in newer IDF versions.
When looping, now disable the TX interrupt after calling rmt_write_items()
function to handle change in IDF behaviour (since v4.1).  Also check length
of pulses to ensure it fits hardware limit.

Fixes issue #7403.
2021-06-25 12:05:12 +10:00
mishafarms 8ff3520f67 esp32/esp32_rmt: Clear config struct before filling it out.
Or unset entries will have garbage in them.

Signed-off-by: mishafarms <github@mishafarms.us>
2021-05-06 15:53:56 +10:00
Damien George 9c2231f47a esp32/esp32_rmt: Don't do unnecessary check for unsigned less than zero.
Signed-off-by: Damien George <damien@micropython.org>
2021-02-15 16:37:52 +11:00
Jonathan Hogg 7dbef5377c esp32/esp32_rmt: Properly fix looping behaviour of RMT.
A previous commit 3a9d948032 can cause
lock-ups of the RMT driver, so this commit reverses that, adds a loop_en
flag, and explicitly controls the TX interrupt in write_pulses().  This
provides correct looping, non-blocking writes and sensible behaviour for
wait_done().

See also #6167.
2020-07-21 00:57:14 +10:00
Jonathan Hogg 3a9d948032 esp32/esp32_rmt: Call rmt_driver_install before rmt_config.
Otherwise the RMT will repeat pulses when using loop(True).  This repeating
is due to a bug in the IDF which will be fixed in an upcoming release, but
for now the accepted workaround is to swap these calls, which should still
work in the fixed version of the IDF.

Fixes issue #6167.
2020-06-19 22:11:14 +10:00
Jon Rob 1678f41744 esp32/esp32_rmt: Extend RMT to support carrier feature.
The ESP32 RMT peripheral has hardware support for a carrier frequency, and
this commit exposes it to Python with the keyword arguments carrier_freq
and carrier_duty_percent in the constructor.  Example usage:

    r = esp32.RMT(0, pin=Pin(2), clock_div=80, carrier_freq=38000, carrier_duty_percent=50)
2020-06-17 00:03:33 +10:00
Thorsten von Eicken 1ae7e0e561 esp32: Consolidate check_esp_err functions and add IDF error string.
This commit consolidates a number of check_esp_err functions that check
whether an ESP-IDF return code is OK and raises an exception if not.  The
exception raised is an OSError with the error code as the first argument
(negative if it's ESP-IDF specific) and the ESP-IDF error string as the
second argument.

This commit also fixes esp32.Partition.set_boot to use check_esp_err, and
uses that function for a unit test.
2020-04-23 10:59:07 +10:00
Jim Mussared def76fe4d9 all: Use MP_ERROR_TEXT for all error messages. 2020-04-05 15:02:06 +10:00
Damien George 1a3e386c67 all: Remove spaces inside and around parenthesis.
Using new options enabled in the uncrustify configuration.
2020-03-28 23:36:44 +11:00
Damien George 69661f3343 all: Reformat C and Python source code with tools/codeformat.py.
This is run with uncrustify 0.70.1, and black 19.10b0.
2020-02-28 10:33:03 +11:00
Matt Trentini 0e0e6132fd esp32/esp32_rmt: Add initial support for RMT peripheral.
This is an ESP32-specific peripheral so lives in the esp32 module.
2019-12-20 12:24:51 +11:00