64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
#pragma once
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#include <Arduino.h>
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#include <esp_idf_version.h>
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#include "Config.h"
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#include "Core.h"
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#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 5, 0)
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#define OPTICAL_USE_RMT_DMA 1
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#include <driver/rmt_rx.h>
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#else
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#define OPTICAL_USE_RMT_DMA 0
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#include <driver/gpio.h>
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#endif
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class PulseReceiver {
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public:
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bool begin();
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bool start(uint32_t expectedHz);
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void stop();
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void resetStream();
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size_t readPeriods(PulsePeriod *periods, size_t capacity, TickType_t waitTicks = 0);
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bool overflowed();
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uint32_t takeDroppedItems();
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uint32_t tickHz() const;
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uint16_t receiveChunkSymbols() const { return receiveChunkSymbols_; }
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bool highRateBackend() const {
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#if OPTICAL_USE_RMT_DMA && CONFIG_IDF_TARGET_ESP32S3
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return true;
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#else
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return false;
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#endif
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}
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private:
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struct Edge { uint32_t tick; uint8_t rising; };
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bool consumeEdge(const Edge &edge, PulsePeriod &period);
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#if OPTICAL_USE_RMT_DMA
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static constexpr size_t BLOCK_SYMBOLS = RMT_MAX_RECEIVE_SYMBOLS;
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struct SymbolBlock { uint16_t count; rmt_symbol_word_t symbols[BLOCK_SYMBOLS]; };
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static bool IRAM_ATTR onRmt(rmt_channel_handle_t, const rmt_rx_done_event_data_t *, void *);
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bool nextRmtEdge(Edge &edge, TickType_t waitTicks);
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rmt_channel_handle_t channel_ = nullptr;
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rmt_symbol_word_t receiveBuffer_[RMT_MAX_RECEIVE_SYMBOLS];
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uint16_t receiveChunkSymbols_ = 0;
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SymbolBlock isrBlock_ = {};
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SymbolBlock block_ = {};
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uint16_t blockIndex_ = 0;
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uint8_t phase_ = 0;
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bool haveLevel_ = false;
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bool level_ = false;
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uint32_t rmtTick_ = 0;
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#else
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static void IRAM_ATTR onGpio(void *ctx);
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uint32_t cpuTickHz_ = 0;
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#endif
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QueueHandle_t queue_ = nullptr;
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volatile bool overflow_ = false;
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volatile uint32_t droppedItems_ = 0;
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bool running_ = false;
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bool haveRise_ = false, haveFall_ = false, haveRawTick_ = false;
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uint32_t lastRawTick_ = 0;
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uint64_t tickEpoch_ = 0, rise_ = 0, fall_ = 0;
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};
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