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Espressif analogbufio implementation

This commit is contained in:
Milind Movasha 2023-02-17 19:19:15 +05:30
parent cd0ff5196a
commit 5635077853
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4 changed files with 327 additions and 0 deletions
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283
ports/espressif/common-hal/analogbufio/BufferedIn.c Normal file
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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* SPDX-FileCopyrightText: Copyright (c) 2023 Milind Movasha
*
* SPDX-License-Identifier: BSD-3-Clause
*
*
* 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.
*/
#include <stdio.h>
#include "common-hal/analogbufio/BufferedIn.h"
#include "shared-bindings/analogbufio/BufferedIn.h"
#include "shared-bindings/microcontroller/Pin.h"
#include "shared/runtime/interrupt_char.h"
#include "py/runtime.h"
#include <string.h>
#include <stdio.h>
#include "sdkconfig.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/semphr.h"
#include "driver/adc.h"
//#define DEBUG_ANALOGBUFIO
#define NUM_SAMPLES_PER_INTERRUPT 256
#define NUM_ADC_CHANNELS 1
#define DMA_BUFFER_SIZE 1024
#define ATTENUATION ADC_ATTEN_DB_0
#define ADC_READ_TIMEOUT_MS 2000
#if defined(CONFIG_IDF_TARGET_ESP32)
#define ADC_RESULT_BYTE 2
#define ADC_CONV_LIMIT_EN 1 //For ESP32, this should always be set to 1
#elif defined(CONFIG_IDF_TARGET_ESP32S2)
#define ADC_RESULT_BYTE 2
#define ADC_CONV_LIMIT_EN 0
#elif defined(CONFIG_IDF_TARGET_ESP32C3) || defined(CONFIG_IDF_TARGET_ESP32H2)
#define ADC_RESULT_BYTE 4
#define ADC_CONV_LIMIT_EN 0
#elif defined(CONFIG_IDF_TARGET_ESP32S3)
#define ADC_RESULT_BYTE 4
#define ADC_CONV_LIMIT_EN 0
#endif
static adc_digi_convert_mode_t convert_mode = ADC_CONV_SINGLE_UNIT_2;
static adc_digi_output_format_t output_format = ADC_DIGI_OUTPUT_FORMAT_TYPE1;
static uint8_t adc_channel = 0;
void common_hal_analogbufio_bufferedin_construct(analogbufio_bufferedin_obj_t *self, const mcu_pin_obj_t *pin, uint32_t sample_rate) {
uint16_t adc1_chan_mask = 0;
uint16_t adc2_chan_mask = 0;
if( self->pin != NULL) {
mp_raise_ValueError(translate("ADC DMA already initialized"));
}
output_format = ADC_DIGI_OUTPUT_FORMAT_TYPE1;
if(pin->adc_index == ADC_UNIT_1) {
convert_mode = ADC_CONV_SINGLE_UNIT_1;
} else {
convert_mode = ADC_CONV_SINGLE_UNIT_2;
}
if (pin->adc_index == NO_ADC || pin->adc_channel == NO_ADC_CHANNEL) {
raise_ValueError_invalid_pin();
}
adc_channel = pin->adc_channel;
/*
* Chip version Conversion Mode Output Format Type
* ESP32 1 TYPE1
* ESP32S2 1,2,BOTH,ALTER TYPE1, TYPE2
* ESP32C3 ALTER TYPE2
* ESP32S3 1,2,BOTH,ALTER TYPE2
* ESP32H3 1,2,BOTH,ALTER TYPE2
*/
#if defined(CONFIG_IDF_TARGET_ESP32)
if(pin->adc_index != ADC_UNIT_1) {
mp_raise_ValueError(translate("ESP32 only supports ADC1 unit"));
}
#endif
#if defined(CONFIG_IDF_TARGET_ESP32S2)
#endif
#if defined(CONFIG_IDF_TARGET_ESP32C3)
//ESP32C3 only supports alter mode
convert_mode = ADC_CONV_ALTER_UNIT;
output_format = ADC_DIGI_OUTPUT_FORMAT_TYPE2;
#endif
#if defined(CONFIG_IDF_TARGET_ESP32S3)
#endif
#if defined(CONFIG_IDF_TARGET_ESP32H2)
#endif
self->pin = pin;
common_hal_mcu_pin_claim(pin);
if(pin->adc_index == ADC_UNIT_1) {
adc1_chan_mask = 1 << pin->adc_channel;
} else {
adc2_chan_mask = 1 << pin->adc_channel;
}
adc_digi_init_config_t adc_dma_config = {
.max_store_buf_size = DMA_BUFFER_SIZE,
.conv_num_each_intr = NUM_SAMPLES_PER_INTERRUPT,
.adc1_chan_mask = adc1_chan_mask,
.adc2_chan_mask = adc2_chan_mask,
};
#if defined(DEBUG_ANALOGBUFIO)
mp_printf(&mp_plat_print,"pin:%d, ADC channel:%d, ADC index:%d, adc1_chan_mask:0x%x, adc2_chan_mask:0x%x\n",pin->number,pin->adc_channel,pin->adc_index,adc1_chan_mask,adc2_chan_mask);
#endif //DEBUG_ANALOGBUFIO
esp_err_t err = adc_digi_initialize(&adc_dma_config);
if(ESP_OK != err) {
common_hal_analogbufio_bufferedin_deinit(self);
mp_raise_ValueError_varg(translate("Unable to initialize ADC DMA controller, ErrorCode:%d"),err);
}
adc_digi_configuration_t dig_cfg = {
.conv_limit_en = ADC_CONV_LIMIT_EN,
.conv_limit_num = 250,
.pattern_num = NUM_ADC_CHANNELS,
.sample_freq_hz = sample_rate,
.conv_mode = convert_mode,
.format = output_format,
};
#if defined(DEBUG_ANALOGBUFIO)
mp_printf(&mp_plat_print,"conversion_mode:%d, format:%d, conv_limit_en:%d, sample_rate:%d\n",convert_mode,output_format,ADC_CONV_LIMIT_EN,sample_rate);
#endif //DEBUG_ANALOGBUFIO
adc_digi_pattern_config_t adc_pattern[NUM_ADC_CHANNELS] = {0};
adc_pattern[0].atten = ATTENUATION;
adc_pattern[0].channel = pin->adc_channel;
if(pin->adc_index == ADC_UNIT_1) {
adc_pattern[0].unit = 0;
} else {
adc_pattern[0].unit = 1;
}
adc_pattern[0].bit_width = SOC_ADC_DIGI_MAX_BITWIDTH;
dig_cfg.adc_pattern = adc_pattern;
#if defined(DEBUG_ANALOGBUFIO)
mp_printf(&mp_plat_print,"adc_pattern[0].channel:%d, adc_pattern[0].unit:%d, adc_pattern[0].atten:%d\n",adc_pattern[0].channel,adc_pattern[0].unit,adc_pattern[0].atten);
#endif //DEBUG_ANALOGBUFIO
err = adc_digi_controller_configure(&dig_cfg);
if(ESP_OK != err) {
common_hal_analogbufio_bufferedin_deinit(self);
mp_raise_ValueError_varg(translate("Unable to configure ADC DMA controller, ErrorCode:%d"),err);
}
err = adc_digi_start();
if(ESP_OK != err) {
common_hal_analogbufio_bufferedin_deinit(self);
mp_raise_ValueError_varg(translate("Unable to start ADC DMA controller, ErrorCode:%d"),err);
}
}
bool common_hal_analogbufio_bufferedin_deinited(analogbufio_bufferedin_obj_t *self) {
return self->pin == NULL;
}
void common_hal_analogbufio_bufferedin_deinit(analogbufio_bufferedin_obj_t *self) {
if (common_hal_analogbufio_bufferedin_deinited(self)) {
return;
}
adc_digi_stop();
adc_digi_deinitialize();
// Release ADC Pin
reset_pin_number(self->pin->number);
self->pin = NULL;
}
static bool check_valid_data(const adc_digi_output_data_t *data)
{
unsigned int unit = data->type2.unit;
if(output_format == ADC_DIGI_OUTPUT_FORMAT_TYPE2) {
if (data->type2.channel >= SOC_ADC_CHANNEL_NUM(unit)) return false;
if (adc_channel != data->type2.channel) return false;
} else {
if( convert_mode == ADC_CONV_SINGLE_UNIT_1 ) {
unit = 0;
} else {
unit = 1;
}
if (data->type1.channel >= SOC_ADC_CHANNEL_NUM(unit)) return false;
if (adc_channel != data->type1.channel) return false;
}
if (unit > 2) return false;
return true;
}
uint32_t common_hal_analogbufio_bufferedin_readinto(analogbufio_bufferedin_obj_t *self, uint8_t *buffer, uint32_t len, uint8_t bytes_per_sample) {
uint8_t result[NUM_SAMPLES_PER_INTERRUPT] __attribute__ ((aligned (4))) = {0};
uint32_t captured_samples = 0;
uint32_t captured_bytes = 0;
esp_err_t ret;
uint32_t ret_num = 0;
#if defined(DEBUG_ANALOGBUFIO)
mp_printf(&mp_plat_print,"Required bytes: %d\n",len);
#endif //DEBUG_ANALOGBUFIO
while(captured_bytes < len) {
ret_num = 0;
ret = adc_digi_read_bytes(result, NUM_SAMPLES_PER_INTERRUPT, &ret_num, ADC_READ_TIMEOUT_MS);
if (ret == ESP_OK) {
for(uint32_t i=0; i<ret_num; i+=ADC_RESULT_BYTE) {
if(check_valid_data((adc_digi_output_data_t *) (void *)&result[i])) {
if(captured_bytes < len) {
if(ADC_RESULT_BYTE == 2) {
if(output_format == ADC_DIGI_OUTPUT_FORMAT_TYPE1) {
*(uint16_t *)(void *)&buffer[captured_bytes] = ((adc_digi_output_data_t *) (void *)&result[i])->type1.data;
} else {
*(uint16_t *)(void *)&buffer[captured_bytes] = ((adc_digi_output_data_t *) (void *)&result[i])->type2.data;
}
} else {
if(output_format == ADC_DIGI_OUTPUT_FORMAT_TYPE1) {
*(uint32_t *)(void *)&buffer[captured_bytes] = ((adc_digi_output_data_t *) (void *)&result[i])->type1.data;
} else {
*(uint32_t *)(void *)&buffer[captured_bytes] = ((adc_digi_output_data_t *) (void *)&result[i])->type2.data;
}
}
captured_bytes += ADC_RESULT_BYTE;
captured_samples++;
} else {
return captured_samples;
}
} else {
#if defined(DEBUG_ANALOGBUFIO)
if(ADC_RESULT_BYTE == 2) {
mp_printf(&mp_plat_print,"Invalid sample received: 0x%0x\n",*(uint16_t *)(void *)&result[i]);
} else {
mp_printf(&mp_plat_print,"Invalid sample received: 0x%0x\n",*(uint32_t *)(void *)&result[i]);
}
#endif //DEBUG_ANALOGBUFIO
return captured_samples;
}
}
} else if (ret == ESP_ERR_TIMEOUT) {
#if defined(DEBUG_ANALOGBUFIO)
mp_printf(&mp_plat_print,"ADC Timeout\n");
#endif //DEBUG_ANALOGBUFIO
return captured_samples;
} else {
#if defined(DEBUG_ANALOGBUFIO)
mp_printf(&mp_plat_print,"adc_digi_read_bytes failed error code:%d\n",ret);
#endif //DEBUG_ANALOGBUFIO
return captured_samples;
}
}
#if defined(DEBUG_ANALOGBUFIO)
mp_printf(&mp_plat_print,"Captured bytes: %d\n",captured_bytes);
#endif //DEBUG_ANALOGBUFIO
return captured_samples;
}

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ports/espressif/common-hal/analogbufio/BufferedIn.h Normal file
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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* SPDX-FileCopyrightText: Copyright (c) 2023 Milind Movasha
*
* SPDX-License-Identifier: BSD-3-Clause
*
* 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_ESP32_COMMON_HAL_ANALOGBUFIO_BUFFEREDIN_H
#define MICROPY_INCLUDED_ESP32_COMMON_HAL_ANALOGBUFIO_BUFFEREDIN_H
#include "common-hal/microcontroller/Pin.h"
#include "py/obj.h"
// This is the analogbufio object
typedef struct {
mp_obj_base_t base;
const mcu_pin_obj_t *pin;
uint8_t chan;
} analogbufio_bufferedin_obj_t;
#endif // MICROPY_INCLUDED_ESP32_COMMON_HAL_ANALOGBUFIO_BUFFEREDIN_H

1
ports/espressif/common-hal/analogbufio/__init__.c Normal file
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// No analogbufio module functions.

1
ports/espressif/mpconfigport.mk
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@ -13,6 +13,7 @@ CIRCUITPY_FULL_BUILD ?= 1
# These modules are implemented in ports/<port>/common-hal:
CIRCUITPY_ALARM ?= 1
CIRCUITPY_AUDIOBUSIO ?= 1
CIRCUITPY_ANALOGBUFIO ?= 1
CIRCUITPY_AUDIOBUSIO_I2SOUT ?= 1
CIRCUITPY_AUDIOBUSIO_PDMIN ?= 0
CIRCUITPY_AUDIOCORE ?= 1