mt6701_spi.h

Go to the documentation of this file.

#pragma once
 
#include "esphome/components/mt6701/mt6701.h"
#include "esphome/components/spi/spi.h"
 
namespace esphome::mt6701_spi {
 
bool decode_frame(const uint8_t frame[3], uint16_t &count, uint8_t &status);
 
// Noise passes the 6-bit CRC 1 time in 64, so setup wants several good frames
static constexpr uint8_t PROBE_FRAMES = 10;
static constexpr uint8_t PROBE_MIN_VALID = 3;
 
enum class ProbeResult : uint8_t {
  PROBE_RESULT_NO_ENCODER,
  PROBE_RESULT_ALL_ZERO,  // a stuck-low data line, or an encoder at rest
  PROBE_RESULT_OK,
};
ProbeResult probe_result(uint8_t valid_frames, bool any_nonzero);
 
class MT6701SPIComponent final : public mt6701::MT6701Component,
                                 public spi::SPIDevice<spi::BIT_ORDER_MSB_FIRST, spi::CLOCK_POLARITY_LOW,
                                                       spi::CLOCK_PHASE_TRAILING, spi::DATA_RATE_1MHZ> {
 public:
  void setup() override;
  void dump_config() override;
 
  uint8_t get_status() const { return this->status_; }
 
 protected:
  bool read_count(uint16_t &count) override;
 
  uint8_t status_{0};
};
 
}  // namespace esphome::mt6701_spi