c6bc9c48c9
tested on metro m7 (green prototype version) with max98357a i2s amplifier and the following test code:
```py
import board
import time
import digitalio
from audiobusio import I2SOut
from audiocore import RawSample
from microcontroller import pin
from ulab import numpy as np
n = np.array(np.sin(np.linspace(0, np.pi*2, 218, endpoint=False)) * 200, dtype=np.int16)
print(n)
r = RawSample(n, sample_rate=8000, channel_count=2)
def main():
with digitalio.DigitalInOut(board.LED) as l:
l.switch_to_output(True)
value = False
while True:
with I2SOut(pin.GPIO_06, pin.GPIO_07, pin.GPIO_04) as i:
time.sleep(.01)
l.value = value = not value
i.play(r, loop=True)
print(i.playing)
time.sleep(.5)
i.stop()
print("STOPPED")
print(i.playing)
time.sleep(.5)
i.play(r, loop=True)
print(i.playing)
print("PLAY AGAIN")
time.sleep(.5)
time.sleep(1)
```
Only stereo, 16-bit, raw samples were tested; the sample rate is actually fixed
at 48kHz in the core right now. There is more to do, but the basics work.
# Conflicts:
# ports/mimxrt10xx/Makefile
# ports/mimxrt10xx/mpconfigport.mk
51 lines
2.5 KiB
C
51 lines
2.5 KiB
C
/*
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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) 2016 Scott Shawcroft
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* Copyright (c) 2019 Artur Pacholec
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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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*/
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#pragma once
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#include "periph.h"
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#include "pins.h"
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void reset_all_pins(void);
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void claim_pin(const mcu_pin_obj_t *pin);
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// List of pins that should never be reset.
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extern const mcu_pin_obj_t *mimxrt10xx_reset_forbidden_pins[];
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// Allow the board to reset a pin in a board-specific way. This can be used
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// for LEDs or enable pins to put them in a state beside the default pull-up,
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// or to simply not reset the pin at all.
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// Return true to indicate that the pin was handled in a special way. Returning false will lead to
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// the port-default reset behavior.
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extern bool mimxrt10xx_board_reset_pin_number(const mcu_pin_obj_t *pin);
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// Find the entry in the peripheral list for this pin. If instance is (-1), any instance (bank_idx) may be used. Otherwise, the bank_idx must match the instance.
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// If instance was -1, and the function succeeds, then instance is updated with the new bank_idx.
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// If the pin is NULL then NULL is always returned. But if it was not NULL, and no match was found, then a ValueError is raised.
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const mcu_periph_obj_t *find_pin_function_sz(const mcu_periph_obj_t *list, size_t sz, const mcu_pin_obj_t *pin, int *instance, uint16_t name);
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#define find_pin_function(list, pin, instance, name) (find_pin_function_sz((list), MP_ARRAY_SIZE((list)), (pin), (instance), (name)))
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