AD5452.cpp

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// Copyright (c) 2024 anabrid GmbH
// Contact: https://www.anabrid.com/licensing/
// SPDX-License-Identifier: MIT OR GPL-2.0-or-later
 
#include "AD5452.h"
 
const SPISettings functions::AD5452::DEFAULT_SPI_SETTINGS{4'000'000, MSBFIRST, SPI_MODE1};
 
functions::AD5452::AD5452(bus::addr_t address, uint8_t alt_function_idx)
    : DataFunction(address, alt_function_idx, DEFAULT_SPI_SETTINGS) {}
 
functions::AD5452::AD5452(bus::addr_t base_addr, uint8_t func_addr_shift, uint8_t alt_function_idx)
    : AD5452(bus::increase_function_idx(base_addr, func_addr_shift), alt_function_idx) {}
 
uint16_t functions::AD5452::float_to_raw(float scale) {
  if (scale <= MIN_FACTOR)
    return RAW_MIN;
  if (scale >= MAX_FACTOR)
    return RAW_MAX;
 
  return static_cast<uint16_t>(roundf(map(scale, MIN_FACTOR, MAX_FACTOR, RAW_MIN, RAW_MAX)));
}
 
float functions::AD5452::raw_to_float(uint16_t raw) {
  return map(static_cast<float>(raw), RAW_MIN, RAW_MAX, MIN_FACTOR, MAX_FACTOR);
}
 
void functions::AD5452::set_scale(uint16_t scale_raw) {
  begin_communication();
  // AD5452 expects at least 13ns delay between chip select and data
  delayNanoseconds(15);
  bus::spi.transfer16(scale_raw << 2);
  end_communication();
}
 
void functions::AD5452::set_scale(float scale) { return set_scale(float_to_raw(scale)); }