65 lines
2.2 KiB
C++
65 lines
2.2 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 <driver/gpio.h>
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#include "Config.h"
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#include "Core.h"
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#if CONFIG_IDF_TARGET_ESP32S3 && ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 5, 0)
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#define OPTICAL_USE_MCPWM_CAPTURE 1
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#include <driver/mcpwm_cap.h>
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#else
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#define OPTICAL_USE_MCPWM_CAPTURE 0
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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, float expectedDutyPct);
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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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uint32_t takeDroppedItems();
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uint32_t tickHz() const;
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uint32_t pulseTickHz() const { return tickHz(); }
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uint32_t plannedTickHz(uint32_t expectedHz, float expectedDutyPct) const;
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uint32_t plannedPulseTickHz(uint32_t expectedHz, float expectedDutyPct) const {
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return plannedTickHz(expectedHz, expectedDutyPct);
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}
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uint16_t receiveChunkSymbols() const { return 1; }
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bool highRateBackend() const { return OPTICAL_USE_MCPWM_CAPTURE; }
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private:
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struct Edge { uint32_t tick; uint8_t rising; };
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struct TimedEdge { uint64_t tick; bool rising; };
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bool consumeEdge(const Edge &edge, PulsePeriod &period);
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bool nextOrderedEdge(Edge &edge, TickType_t waitTicks);
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TimedEdge extendEdge(const Edge &edge);
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#if OPTICAL_USE_MCPWM_CAPTURE
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static bool IRAM_ATTR onCapture(mcpwm_cap_channel_handle_t,
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const mcpwm_capture_event_data_t *, void *);
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mcpwm_cap_timer_handle_t captureTimer_ = nullptr;
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mcpwm_cap_channel_handle_t risingChannel_ = nullptr;
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mcpwm_cap_channel_handle_t fallingChannel_ = nullptr;
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uint32_t captureResolutionHz_ = 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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Edge reorderEdge_ = {};
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bool haveReorderEdge_ = false;
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volatile uint32_t droppedItems_ = 0;
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volatile bool running_ = false;
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uint32_t expectedHz_ = 0;
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float expectedDutyPct_ = 50.0f;
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bool polarityKnown_ = false, activeStartRising_ = false;
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TimedEdge syncEdges_[3] = {};
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uint8_t syncEdgeCount_ = 0;
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bool waitingForActiveEnd_ = true;
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uint64_t activeStart_ = 0, activeEnd_ = 0;
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bool haveRawTick_ = false;
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uint32_t lastRawTick_ = 0;
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uint64_t tickEpoch_ = 0;
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};
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