8000 RP2: Add Audio support for Arduino Nano RP2040. · micropython/micropython@fdeb249 · GitHub
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RP2: Add Audio support for Arduino Nano RP2040.
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‎ports/rp2/boards/ARDUINO_NANO_RP2040_CONNECT/audio/modaudio.c

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‎ports/rp2/boards/ARDUINO_NANO_RP2040_CONNECT/audio/pdm.pio

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; This file is part of the MicroPython project, http://micropython.org/
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;
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; The MIT License (MIT)
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;
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; Copyright (c) 2013-2021 Ibrahim Abdelkader <iabdalkader@openmv.io>
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;
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; Permission is hereby granted, free of charge, to any person obtaining a copy
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; of this software and associated documentation files (the "Software"), to deal
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; in the Software without restriction, including without limitation the rights
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; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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; copies of the Software, and to permit persons to whom the Software is
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; furnished to do so, subject to the following conditions:
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;
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; The above copyright notice and this permission notice shall be included in
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; all copies or substantial portions of the Software.
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;
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; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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; THE SOFTWARE.
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.program pdm_pio
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.side_set 1
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.wrap_target
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push iffull noblock side 1
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in pins, 1 side 0
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.wrap
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% c-sdk {
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#include "hardware/gpio.h"
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static inline void pdm_pio_program_init(PIO pio, uint sm, uint offset, uint clk, uint din, float div) {
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pio_sm_config c = pdm_pio_program_get_default_config(offset);
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sm_config_set_sideset(&c, 1, false, false);
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sm_config_set_in_shift(&c, false, false, 8);
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sm_config_set_in_pins(&c, din);
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sm_config_set_sideset_pins(&c, clk);
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sm_config_set_clkdiv(&c, div);
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pio_sm_set_consecutive_pindirs(pio, sm, din, 1, false);
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pio_sm_set_consecutive_pindirs(pio, sm, clk, 1, true);
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pio_sm_set_pins_with_mask(pio, sm, 0, (1u << clk) );
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pio_gpio_init(pio, clk);
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pio_sm_init(pio, sm, offset, &c);
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pio_sm_set_enabled(pio, sm, true);
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}
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%}

‎ports/rp2/boards/ARDUINO_NANO_RP2040_CONNECT/micropython.cmake

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# Create an INTERFACE library for our C module.
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add_library(nano_modules INTERFACE)
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target_compile_definitions(nano_modules INTERFACE
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MICROPY_PY_AUDIO=1
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USE_LUT
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)
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# Add the current directory as an include directory.
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target_include_directories(nano_modules INTERFACE
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${CMAKE_CURRENT_LIST_DIR}/openpdm
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)
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# Add our source files to the lib
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target_sources(nano_modules INTERFACE
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${CMAKE_CURRENT_LIST_DIR}/audio/modaudio.c
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${CMAKE_CURRENT_LIST_DIR}/openpdm/OpenPDMFilter.c
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)
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# PDM PIO program
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pico_generate_pio_header(nano_modules
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${CMAKE_CURRENT_LIST_DIR}/audio/pdm.pio
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)
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# Link our INTERFACE library to the usermod target.
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target_link_libraries(usermod INTERFACE nano_modules)

‎ports/rp2/boards/ARDUINO_NANO_RP2040_CONNECT/mpconfigboard.cmake

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set(MICROPY_BLUETOOTH_NIMBLE 1)
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set(MICROPY_PY_NETWORK_NINAW10 1)
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set(MICROPY_HW_ENABLE_DOUBLE_TAP 1)
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set(USER_C_MODULES ${MICROPY_BOARD_DIR}/micropython.cmake)
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set(MICROPY_FROZEN_MANIFEST ${MICROPY_BOARD_DIR}/manifest.py)

‎ports/rp2/boards/ARDUINO_NANO_RP2040_CONNECT/mpconfigboard.h

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#define MICROPY_HW_NINA_GPIO0 (2)
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#define MICROPY_HW_NINA_GPIO1 (9)
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#define MICROPY_HW_NINA_ACK (10)
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// AUDIO config.
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#define MICROPY_HW_PDM_PIO (pio1)
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#define MICROPY_HW_PDM_SM (0)
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#define MICROPY_HW_PDM_DMA (1)
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#define MICROPY_HW_PDM_DMA_IRQ (DMA_IRQ_1)
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#define MICROPY_HW_PDM_CLK_PIN (23)
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#define MICROPY_HW_PDM_DIN_PIN (22)
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#define MICROPY_BOARD_ROOT_POINTERS struct _audio_data_t *audio_data;

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