AnalogFastIn
This commit is contained in:
Lee Atkinson
parent
f69939c49c
commit
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@ -1 +1,169 @@
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/* AnalogFastIn.c */
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/*
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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) 2021 Scott Shawcroft for Adafruit Industries
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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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#include "common-hal/analogio/AnalogFastIn.h"
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#include "shared-bindings/analogio/AnalogFastIn.h"
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#include "shared-bindings/microcontroller/Pin.h"
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#include "py/runtime.h"
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#include "supervisor/shared/translate/translate.h"
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#include "src/rp2_common/hardware_adc/include/hardware/adc.h"
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#include "src/rp2_common/hardware_dma/include/hardware/dma.h"
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// /sdk/src/rp2_common/hardware_dma/include/hardware/dma.h
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// ports/raspberrypi/
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#include "sdk/src/common/pico_stdlib/include/pico/stdlib.h"
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#define ADC_FIRST_PIN_NUMBER 26
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#define ADC_PIN_COUNT 4
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// Channel 0 is GPIO26
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#define CAPTURE_CHANNEL 0
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#define CAPTURE_DEPTH 1000
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uint8_t capture_buf[CAPTURE_DEPTH];
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// ADC unit8 or int8 ??? ---> unint16
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//
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// uint16_t common_hal_analogio_analogin_get_value(analogio_analogin_obj_t *self) {
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// adc_select_input(self->pin->number - ADC_FIRST_PIN_NUMBER);
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// uint16_t value = adc_read();
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//
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// // Stretch 12-bit ADC reading to 16-bit range
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// return (value << 4) | (value >> 8);
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// }
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/*
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typedef struct {
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mp_obj_base_t base;
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uint8_t number;
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} mcu_pin_obj_t;
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*/
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// self->pin = pin;
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// self->buffer = buffer;
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// self->len = len;
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// //self->bits_per_sample = bytes_per_sample * 8;
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// self->samples_signed = samples_signed;
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// self->sample_rate = sample_rate;
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void common_hal_analogio_analogfastin_construct(analogio_analogfastin_obj_t *self, const mcu_pin_obj_t *pin, uint8_t *buffer, uint32_t len, uint8_t bytes_per_sample, bool samples_signed, uint32_t sample_rate) {
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// Set pin and channel
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self->pin = pin;
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self->chan = pin->number - ADC_FIRST_PIN_NUMBER;
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// Checks on chan value here
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// Set buffer and length
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self->buffer = buffer;
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self->len = len;
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// checks on length here
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// uint8_t bytes_per_sample
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// Set sample rate
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// self->bits_per_sample = bytes_per_sample * 8;
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self->sample_rate = sample_rate;
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// Standard IO Init
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stdio_init_all();
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// Init GPIO for analogue use: hi-Z, no pulls, disable digital input buffer.
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adc_init();
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adc_gpio_init(pin->number);
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adc_select_input(self->chan); // chan = pin - 26 ??
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// adc_select_input(self->pin->number - ADC_FIRST_PIN_NUMBER);
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adc_fifo_setup(
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true, // Write each completed conversion to the sample FIFO
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true, // Enable DMA data request (DREQ)
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1, // DREQ (and IRQ) asserted when at least 1 sample present
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false, // We won't see the ERR bit because of 8 bit reads; disable. // ??
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true // Shift each sample to 8 bits when pushing to FIFO // ??
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);
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// Divisor of 0 -> full speed. Free-running capture with the divider is
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// equivalent to pressing the ADC_CS_START_ONCE button once per `div + 1`
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// cycles (div not necessarily an integer). Each conversion takes 96
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// cycles, so in general you want a divider of 0 (hold down the button
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// continuously) or > 95 (take samples less frequently than 96 cycle
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// intervals). This is all timed by the 48 MHz ADC clock.
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// sample rate determines divisor, not zero.
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adc_set_clkdiv(0);
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// sleep_ms(1000);
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// Set up the DMA to start transferring data as soon as it appears in FIFO
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uint dma_chan = dma_claim_unused_channel(true);
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self->dma_chan = dma_chan;
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dma_channel_config cfg = dma_channel_get_default_config(dma_chan);
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// Reading from constant address, writing to incrementing byte addresses
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channel_config_set_transfer_data_size(&cfg, DMA_SIZE_8);
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channel_config_set_read_increment(&cfg, false);
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channel_config_set_write_increment(&cfg, true);
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// Pace transfers based on availability of ADC samples
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channel_config_set_dreq(&cfg, DREQ_ADC);
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dma_channel_configure(dma_chan, &cfg,
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capture_buf, // dst
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&adc_hw->fifo, // src
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self->len, // CAPTURE_DEPTH, // transfer count
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true // start immediately
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);
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}
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bool common_hal_analogio_analogfastin_deinited(analogio_analogfastin_obj_t *self) {
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return self->pin == NULL;
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}
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void common_hal_analogio_analogfastin_deinit(analogio_analogfastin_obj_t *self) {
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if (common_hal_analogio_analogfastin_deinited(self)) {
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return;
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}
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reset_pin_number(self->pin->number);
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self->pin = NULL;
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}
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// ================================================================
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// capture()
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// make this a bool so that later we can perform integrity checking
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// ================================================================
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bool common_hal_analogio_analogfastin_capture(analogio_analogfastin_obj_t *self) {
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// uint16_t value = adc_read();
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// Stretch 12-bit ADC reading to 16-bit range
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// return (value << 4) | (value >> 8);
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adc_run(true);
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// Once DMA finishes, stop any new conversions from starting, and clean up
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// the FIFO in case the ADC was still mid-conversion.
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dma_channel_wait_for_finish_blocking(self->dma_chan);
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// printf("Capture finished\n");
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adc_run(false);
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adc_fifo_drain();
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return true;
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}
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@ -1 +1,71 @@
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/* AnalogFastIn.h */
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/*
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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) 2021 Scott Shawcroft for Adafruit Industries
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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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#ifndef MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_ANALOGIO_ANALOGFASTIN_H
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#define MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_ANALOGIO_ANALOGFASTIN_H
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#include "common-hal/microcontroller/Pin.h"
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#include "py/obj.h"
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// We can extend the struct without impact to existing code
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typedef struct {
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mp_obj_base_t base;
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const mcu_pin_obj_t *pin;
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uint8_t *buffer;
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uint32_t len;
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uint8_t bytes_per_sample;
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bool samples_signed;
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uint32_t sample_rate;
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uint8_t chan;
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uint dma_chan;
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// data_size = DMA_SIZE_8; // - default DMA_SIZE_8
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// data_size = DMA_SIZE_16; // - default DMA_SIZE_16
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// Either 12 bits in 16 or 12 over 2 bytes or truncate 12 to 8 in 8
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// Either B or H, default array.array("h", [0]*length) "h"==short (16 bits signed)
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} analogio_analogfastin_obj_t;
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// void common_hal_analogio_analogfastin_construct(analogio_analogfastin_obj_t *self, const mcu_pin_obj_t *pin, uint8_t *buffer, uint32_t len, uint8_t bytes_per_sample, bool samples_signed, uint32_t sample_rate)
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/*
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void common_hal_analogio_analogfastin_construct(analogio_analogfastin_obj_t *self,
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const mcu_pin_obj_t *pin,
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uint8_t *buffer,
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uint32_t len,
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uint8_t bytes_per_sample,
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bool samples_signed,
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uint32_t sample_rate) {
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self->pin = pin;
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self->buffer = buffer;
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self->len = len;
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//self->bits_per_sample = bytes_per_sample * 8;
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self->samples_signed = samples_signed;
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self->sample_rate = sample_rate;
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}
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*/
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void analogfastin_init(void);
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#endif // MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_ANALOGIO_ANALOGFASTIN_H
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@ -390,6 +390,7 @@ SRC_COMMON_HAL_ALL = \
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alarm/time/TimeAlarm.c \
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alarm/touch/TouchAlarm.c \
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analogio/AnalogIn.c \
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analogio/AnalogFastIn.c \
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analogio/AnalogOut.c \
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analogio/__init__.c \
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audiobusio/I2SOut.c \
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@ -1 +1,162 @@
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/* AnalogFastIn.c */
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/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* SPDX-FileCopyrightText: Copyright (c) 2013, 2014 Damien P. George
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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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#include <string.h>
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#include "shared/runtime/context_manager_helpers.h"
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#include "py/binary.h"
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#include "py/mphal.h"
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#include "py/nlr.h"
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#include "py/objproperty.h"
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#include "py/runtime.h"
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#include "shared-bindings/microcontroller/Pin.h"
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#include "shared-bindings/analogio/AnalogFastIn.h"
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#include "shared-bindings/util.h"
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// pin, buffer, rate
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STATIC mp_obj_t analogio_analogfastin_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
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enum { ARG_pin, ARG_buffer, ARG_sample_rate };
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_pin, MP_ARG_REQUIRED | MP_ARG_OBJ },
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{ MP_QSTR_buffer, MP_ARG_OBJ | MP_ARG_REQUIRED },
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{ MP_QSTR_sample_rate, MP_ARG_INT | MP_ARG_KW_ONLY, {.u_int = 8000} },
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};
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mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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// Validate Pin
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const mcu_pin_obj_t *pin = validate_obj_is_free_pin(args[ARG_pin].u_obj);
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// Buffer Pointer defined and allocated by user
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mp_buffer_info_t bufinfo;
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mp_get_buffer_raise(args[ARG_buffer].u_obj, &bufinfo, MP_BUFFER_READ);
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// signed or unsigned, byte per sample
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bool signed_samples = bufinfo.typecode == 'b' || bufinfo.typecode == 'h';
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uint8_t bytes_per_sample = 1;
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// Bytes Per Sample
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if (bufinfo.typecode == 'h' || bufinfo.typecode == 'H') {
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bytes_per_sample = 2;
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} else if (bufinfo.typecode != 'b' && bufinfo.typecode != 'B' && bufinfo.typecode != BYTEARRAY_TYPECODE) {
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mp_raise_ValueError(translate("sample_source buffer must be a bytearray or array of type 'h', 'H', 'b' or 'B'"));
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}
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// Validate sample rate here
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uint32_t sample_rate = args[ARG_sample_rate].u_int;
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// Create local object
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analogio_analogfastin_obj_t *self = m_new_obj(analogio_analogfastin_obj_t);
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self->base.type = &analogio_analogfastin_type;
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// Call local intereface in ports/common-hal/analogio
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common_hal_analogio_analogfastin_construct(self,
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pin,
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((uint8_t *)bufinfo.buf),
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bufinfo.len,
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bytes_per_sample,
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signed_samples,
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sample_rate
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);
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return MP_OBJ_FROM_PTR(self);
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}
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//| def deinit(self) -> None:
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//| """Turn off the AnalogFastIn and release the pin for other use."""
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//| ...
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//|
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STATIC mp_obj_t analogio_analogfastin_deinit(mp_obj_t self_in) {
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analogio_analogfastin_obj_t *self = MP_OBJ_TO_PTR(self_in);
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common_hal_analogio_analogfastin_deinit(self);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(analogio_analogfastin_deinit_obj, analogio_analogfastin_deinit);
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STATIC void check_for_deinit(analogio_analogfastin_obj_t *self) {
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if (common_hal_analogio_analogfastin_deinited(self)) {
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raise_deinited_error();
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}
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}
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//| def __enter__(self) -> AnalogFastIn:
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//| """No-op used by Context Managers."""
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//| ...
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//|
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// Provided by context manager helper.
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//| def __exit__(self) -> None:
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//| """Automatically deinitializes the hardware when exiting a context. See
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//| :ref:`lifetime-and-contextmanagers` for more info."""
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//| ...
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//|
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STATIC mp_obj_t analogio_analogfastin___exit__(size_t n_args, const mp_obj_t *args) {
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(void)n_args;
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common_hal_analogio_analogfastin_deinit(args[0]);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(analogio_analogfastin___exit___obj, 4, 4, analogio_analogfastin___exit__);
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//| value: int
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//| """The value on the analog pin between 0 and 65535 inclusive (16-bit). (read-only)
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//|
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//| Even if the underlying analog to digital converter (ADC) is lower
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//| resolution, the value is 16-bit."""
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//|
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STATIC mp_obj_t analogio_analogfastin_obj_capture(mp_obj_t self_in) {
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analogio_analogfastin_obj_t *self = MP_OBJ_TO_PTR(self_in);
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check_for_deinit(self);
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return MP_OBJ_NEW_SMALL_INT(common_hal_analogio_analogfastin_capture(self));
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}
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MP_DEFINE_CONST_FUN_OBJ_1(analogio_analogfastin_capture_obj, analogio_analogfastin_obj_capture);
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// MP_PROPERTY_GETTER(analogio_analogfastin_value_obj,
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// (mp_obj_t)&analogio_analogfastin_get_value_obj);
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//| reference_voltage: float
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//| """The maximum voltage measurable (also known as the reference voltage) as a
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//| `float` in Volts. Note the ADC value may not scale to the actual voltage linearly
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//| at ends of the analog range."""
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//|
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STATIC const mp_rom_map_elem_t analogio_analogfastin_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&analogio_analogfastin_deinit_obj) },
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{ MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
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{ MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&analogio_analogfastin___exit___obj) },
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{ MP_ROM_QSTR(MP_QSTR_capture), MP_ROM_PTR(&analogio_analogfastin_capture_obj)},
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};
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STATIC MP_DEFINE_CONST_DICT(analogio_analogfastin_locals_dict, analogio_analogfastin_locals_dict_table);
|
||||
|
||||
const mp_obj_type_t analogio_analogfastin_type = {
|
||||
{ &mp_type_type },
|
||||
.name = MP_QSTR_AnalogFastIn,
|
||||
.make_new = analogio_analogfastin_make_new,
|
||||
.locals_dict = (mp_obj_t)&analogio_analogfastin_locals_dict,
|
||||
};
|
||||
|
|
|
|||
|
|
@ -1 +1,39 @@
|
|||
/* AnalogFastIn.h */
|
||||
/*
|
||||
* This file is part of the Micro Python project, http://micropython.org/
|
||||
*
|
||||
* The MIT License (MIT)
|
||||
*
|
||||
* SPDX-FileCopyrightText: Copyright (c) 2013, 2014 Damien P. George
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_ANALOGIO_ANALOGFASTIN_H
|
||||
#define MICROPY_INCLUDED_SHARED_BINDINGS_ANALOGIO_ANALOGFASTIN_H
|
||||
|
||||
#include "common-hal/microcontroller/Pin.h"
|
||||
#include "common-hal/analogio/AnalogFastIn.h"
|
||||
|
||||
extern const mp_obj_type_t analogio_analogfastin_type;
|
||||
|
||||
void common_hal_analogio_analogfastin_construct(analogio_analogfastin_obj_t *self, const mcu_pin_obj_t *pin, uint8_t *buffer, uint32_t len, uint8_t bytes_per_sample, bool samples_signed, uint32_t sample_rate);
|
||||
void common_hal_analogio_analogfastin_deinit(analogio_analogfastin_obj_t *self);
|
||||
bool common_hal_analogio_analogfastin_deinited(analogio_analogfastin_obj_t *self);
|
||||
bool common_hal_analogio_analogfastin_capture(analogio_analogfastin_obj_t *self);
|
||||
#endif // __MICROPY_INCLUDED_SHARED_BINDINGS_ANALOGIO_ANALOGFASTIN_H__
|
||||
|
|
|
|||
|
|
@ -32,6 +32,7 @@
|
|||
#include "shared-bindings/microcontroller/Pin.h"
|
||||
#include "shared-bindings/analogio/__init__.h"
|
||||
#include "shared-bindings/analogio/AnalogIn.h"
|
||||
#include "shared-bindings/analogio/AnalogFastIn.h"
|
||||
#include "shared-bindings/analogio/AnalogOut.h"
|
||||
|
||||
//| """Analog hardware support
|
||||
|
|
@ -70,6 +71,7 @@
|
|||
STATIC const mp_rom_map_elem_t analogio_module_globals_table[] = {
|
||||
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_analogio) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_AnalogIn), MP_ROM_PTR(&analogio_analogin_type) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_AnalogFastIn), MP_ROM_PTR(&analogio_analogfastin_type) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_AnalogOut), MP_ROM_PTR(&analogio_analogout_type) },
|
||||
};
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue