esp-idf/components/esp_adc/adc_continuous_internal.h

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/*
* SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include <stdint.h>
#include <stdbool.h>
#include "sdkconfig.h"
#include "esp_pm.h"
#include "freertos/FreeRTOS.h"
#include "freertos/ringbuf.h"
#include "hal/adc_types.h"
#include "hal/adc_hal.h"
//For DMA
#if SOC_GDMA_SUPPORTED
#include "esp_private/gdma.h"
#elif CONFIG_IDF_TARGET_ESP32S2
#include "hal/spi_types.h"
#include "esp_private/spi_common_internal.h"
#elif CONFIG_IDF_TARGET_ESP32
#include "driver/i2s_types.h"
#endif
#include "esp_adc/adc_filter.h"
#include "esp_adc/adc_monitor.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef enum {
ADC_FSM_INIT,
ADC_FSM_STARTED,
} adc_fsm_t;
typedef enum {
ADC_MONITOR_FSM_INIT,
ADC_MONITOR_FSM_ENABLED,
} adc_monitor_fsm_t;
/*---------------------------------------------------------------
Driver Context
---------------------------------------------------------------*/
typedef struct adc_iir_filter_t adc_iir_filter_t;
typedef struct adc_monitor_t adc_monitor_t;
typedef struct adc_continuous_ctx_t adc_continuous_ctx_t;
/**
* @brief ADC iir filter context
*/
struct adc_iir_filter_t {
adc_digi_iir_filter_t filter_id; // Filter ID
adc_continuous_iir_filter_config_t cfg; //filter configuration
adc_continuous_ctx_t *continuous_ctx; //ADC continuous driver context
};
/**
* @brief ADC digi monitor context
*/
struct adc_monitor_t {
adc_monitor_id_t monitor_id; // monitor unit number
adc_monitor_fsm_t fsm; // monitor status indicator
adc_monitor_config_t config; // monitor configuration
adc_monitor_evt_cbs_t cbs; // monitor thresh callbacks
void *user_data; // user data pointer to use in cb
};
/**
* @brief ADC continuous driver context
*/
struct adc_continuous_ctx_t {
uint8_t *rx_dma_buf; //dma buffer
adc_hal_dma_ctx_t hal; //hal context
#if SOC_GDMA_SUPPORTED
gdma_channel_handle_t rx_dma_channel; //dma rx channel handle
#elif CONFIG_IDF_TARGET_ESP32S2
spi_host_device_t spi_host; //ADC uses this SPI DMA
spi_dma_ctx_t *spi_dma_ctx; //spi_dma context
#elif CONFIG_IDF_TARGET_ESP32
i2s_port_t i2s_host; //ADC uses this I2S DMA
#endif
intr_handle_t dma_intr_hdl; //DMA Interrupt handler
RingbufHandle_t ringbuf_hdl; //RX ringbuffer handler
void* ringbuf_storage; //Ringbuffer storage buffer
void* ringbuf_struct; //Ringbuffer structure buffer
size_t ringbuf_size; //Ringbuffer size
intptr_t rx_eof_desc_addr; //eof descriptor address of RX channel
adc_fsm_t fsm; //ADC continuous mode driver internal states
bool use_adc1; //1: ADC unit1 will be used; 0: ADC unit1 won't be used.
bool use_adc2; //1: ADC unit2 will be used; 0: ADC unit2 won't be used. This determines whether to acquire sar_adc2_mutex lock or not.
adc_atten_t adc1_atten; //Attenuation for ADC1. On this chip each ADC can only support one attenuation.
adc_atten_t adc2_atten; //Attenuation for ADC2. On this chip each ADC can only support one attenuation.
adc_hal_digi_ctrlr_cfg_t hal_digi_ctrlr_cfg; //Hal digital controller configuration
adc_continuous_evt_cbs_t cbs; //Callbacks
void *user_data; //User context
esp_pm_lock_handle_t pm_lock; //For power management
struct {
uint32_t flush_pool: 1; //Flush the internal pool when the pool is full. With this flag, the `on_pool_ovf` event will not happen.
} flags;
#if SOC_ADC_DIG_IIR_FILTER_SUPPORTED
adc_iir_filter_t *iir_filter[SOC_ADC_DIGI_IIR_FILTER_NUM]; //ADC IIR filter context
#endif
#if SOC_ADC_MONITOR_SUPPORTED
adc_monitor_t *adc_monitor[SOC_ADC_DIGI_MONITOR_NUM]; // adc monitor context
#endif
};
#ifdef __cplusplus
}
#endif