icmd.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 "icmd.h"
#include "block/iblock.h"
 
#include <entity/meta.h>
#include <utils/is_number.h>
#include <utils/logging.h>
 
const SPISettings functions::ICommandRegisterFunction::DEFAULT_SPI_SETTINGS{
    4'000'000, MSBFIRST, SPI_MODE2 /* chip expects SPI MODE0, but CLK is inverted on the way */};
 
functions::ICommandRegisterFunction::ICommandRegisterFunction(bus::addr_t address)
    : SR74HCT595(address, DEFAULT_SPI_SETTINGS) {}
 
uint8_t functions::ICommandRegisterFunction::chip_cmd_word(uint8_t chip_input_idx, uint8_t chip_output_idx,
                                                           bool connect) {
  return (connect ? 0b1'000'0000 : 0b0'000'0000) | ((chip_output_idx & 0x7) << 4) | (chip_input_idx & 0xF);
}