codex init

OpticalChannelTester/Receiver.h

@@ -0,0 +1,57 @@
+#pragma once
+#include <Arduino.h>
+#include <esp_idf_version.h>
+#include "Core.h"
+
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 5, 0)
+#define OPTICAL_USE_RMT_DMA 1
+#include <driver/rmt_rx.h>
+#else
+#define OPTICAL_USE_RMT_DMA 0
+#include <driver/gpio.h>
+#endif
+
+class PulseReceiver {
+ public:
+  bool begin();
+  bool start(uint32_t expectedHz);
+  void stop();
+  void resetStream();
+  bool poll(PulsePeriod &period);
+  bool overflowed();
+  uint32_t tickHz() const;
+  bool highRateBackend() const {
+#if OPTICAL_USE_RMT_DMA && CONFIG_IDF_TARGET_ESP32S3
+    return true;
+#else
+    return false;
+#endif
+  }
+ private:
+  struct Edge { uint32_t tick; uint8_t rising; };
+  bool consumeEdge(const Edge &edge, PulsePeriod &period);
+
+#if OPTICAL_USE_RMT_DMA
+  static constexpr size_t BLOCK_SYMBOLS = 64;
+  struct SymbolBlock { uint16_t count; rmt_symbol_word_t symbols[BLOCK_SYMBOLS]; };
+  static bool IRAM_ATTR onRmt(rmt_channel_handle_t, const rmt_rx_done_event_data_t *, void *);
+  bool nextRmtEdge(Edge &edge);
+  rmt_channel_handle_t channel_ = nullptr;
+  rmt_symbol_word_t dmaBuffer_[512];
+  SymbolBlock block_ = {};
+  uint16_t blockIndex_ = 0;
+  uint8_t phase_ = 0;
+  bool haveLevel_ = false;
+  bool level_ = false;
+  uint32_t rmtTick_ = 0;
+#else
+  static void IRAM_ATTR onGpio(void *ctx);
+  uint32_t cpuTickHz_ = 0;
+#endif
+  QueueHandle_t queue_ = nullptr;
+  volatile bool overflow_ = false;
+  bool running_ = false;
+  bool haveRise_ = false, haveFall_ = false, haveRawTick_ = false;
+  uint32_t lastRawTick_ = 0;
+  uint64_t tickEpoch_ = 0, rise_ = 0, fall_ = 0;
+};