daq.h

Go to the documentation of this file.

// Copyright (c) 2024 anabrid GmbH
// Contact: https://www.anabrid.com/licensing/
//
// SPDX-License-Identifier: MIT OR GPL-2.0-or-later
 
#pragma once
 
#include "daq/daq.h"
#include "protocol/handler.h"
 
namespace msg {
namespace handlers {
 
class OneshotDAQHandler : public MessageHandler {
public:
  int handle(JsonObjectConst msg_in, JsonObject &msg_out) override {
    std::array<float, daq::NUM_CHANNELS> data{};
 
    auto do_sample_avg = msg_in["sample_avg"];
    if (do_sample_avg) {
      data = daq::average(daq::sample, do_sample_avg["size_samples"], do_sample_avg["avg_us"]);
    } else {
      data = daq::sample();
    }
 
    if (msg_in.containsKey("channel")) {
      uint8_t channel = msg_in["channel"];
      if (channel < 0 || channel >= daq::NUM_CHANNELS) {
        msg_out["error"] = "Channel has to be a single number.";
        return error(1);
      }
 
      msg_out["data"] = data[channel];
      return error(0);
    } else {
      auto data_json = msg_out.createNestedArray("data");
      copyArray(data.data(), data.size(), data_json);
      return error(0);
    }
  }
};
 
} // namespace handlers
} // namespace msg