Add Slice 4 tuner stack with AGENTS-compliant core types and HTTP API.
Introduces Si4684/ADAU1701 drivers, TunerService, FrequencyKHz, SeekDirection, /api/tuner routes without file-scope globals, host tests, and firmware blob tooling (binaries remain gitignored). Co-authored-by: Cursor <cursoragent@cursor.com>
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Cursor
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/**
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* @file Adau1701Driver.cpp
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* @brief Adau1701Driver implementation.
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*
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* DigiRadio firmware — https://github.com/manvalan/DigiRadio
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*
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* Copyright 2026 Michele Bigi
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* SPDX-License-Identifier: Apache-2.0
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*
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* @author Michele Bigi
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* @date 2026-07-06
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*/
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#include "adau1701/Adau1701Driver.hpp"
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#include "SigmaStudioFW.h"
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#include "driver/gpio.h"
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#include "driver/i2c_master.h"
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#include "esp_log.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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extern "C" {
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/** @brief SigmaStudio default program download (generated C, not part of the C++ API). */
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void adau1701_run_default_download(void);
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} // extern "C"
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namespace adau1701 {
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namespace {
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constexpr char kTag[] = "Adau1701";
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constexpr int kI2cPort = 0;
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} // namespace
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Adau1701Driver::Adau1701Driver(Adau1701Pins pins)
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: pins_(pins)
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, booted_(false)
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, i2cBus_(nullptr)
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, i2cDev_(nullptr)
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{
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}
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Adau1701Driver::~Adau1701Driver()
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{
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auto* dev = static_cast<i2c_master_dev_handle_t>(i2cDev_);
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auto* bus = static_cast<i2c_master_bus_handle_t>(i2cBus_);
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if (dev != nullptr) {
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i2c_master_bus_rm_device(dev);
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}
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if (bus != nullptr) {
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i2c_del_master_bus(bus);
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}
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}
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std::expected<void, Adau1701Error> Adau1701Driver::boot()
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{
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if (booted_) {
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return {};
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}
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gpio_config_t resetCfg = {};
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resetCfg.pin_bit_mask = 1ULL << pins_.resetGpio;
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resetCfg.mode = GPIO_MODE_OUTPUT;
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if (gpio_config(&resetCfg) != ESP_OK) {
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return std::unexpected(Adau1701Error::ResetFailed);
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}
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gpio_set_level(static_cast<gpio_num_t>(pins_.resetGpio), 0);
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vTaskDelay(pdMS_TO_TICKS(10));
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gpio_set_level(static_cast<gpio_num_t>(pins_.resetGpio), 1);
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vTaskDelay(pdMS_TO_TICKS(10));
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i2c_master_bus_config_t busCfg = {};
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busCfg.i2c_port = static_cast<i2c_port_num_t>(kI2cPort);
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busCfg.sda_io_num = static_cast<gpio_num_t>(pins_.i2cSda);
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busCfg.scl_io_num = static_cast<gpio_num_t>(pins_.i2cScl);
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busCfg.clk_source = I2C_CLK_SRC_DEFAULT;
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busCfg.glitch_ignore_cnt = 7;
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busCfg.flags.enable_internal_pullup = true;
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i2c_master_bus_handle_t bus = nullptr;
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if (i2c_new_master_bus(&busCfg, &bus) != ESP_OK) {
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ESP_LOGE(kTag, "i2c_new_master_bus failed");
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return std::unexpected(Adau1701Error::I2cInitFailed);
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}
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i2cBus_ = bus;
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i2c_device_config_t devCfg = {};
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devCfg.dev_addr_length = I2C_ADDR_BIT_LEN_7;
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devCfg.device_address = static_cast<uint16_t>(pins_.i2cAddr7);
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devCfg.scl_speed_hz = 100000;
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i2c_master_dev_handle_t dev = nullptr;
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if (i2c_master_bus_add_device(bus, &devCfg, &dev) != ESP_OK) {
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ESP_LOGE(kTag, "i2c_master_bus_add_device failed");
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return std::unexpected(Adau1701Error::I2cInitFailed);
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}
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i2cDev_ = dev;
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sigma_studio_bind_i2c(kI2cPort, static_cast<unsigned char>(pins_.i2cAddr7));
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sigma_studio_set_device(dev);
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adau1701_run_default_download();
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booted_ = true;
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ESP_LOGI(kTag, "SigmaStudio program loaded");
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return {};
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}
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bool Adau1701Driver::isBooted() const noexcept
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{
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return booted_;
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}
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} // namespace adau1701
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/**
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* @file SigmaStudioFW.c
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* @brief SigmaStudio SIGMA_WRITE_REGISTER_BLOCK for ESP-IDF I2C.
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*
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* DigiRadio firmware — https://github.com/manvalan/DigiRadio
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*
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* Copyright 2026 Michele Bigi
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* SPDX-License-Identifier: Apache-2.0
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*
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* @author Michele Bigi
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* @date 2026-07-06
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*/
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#include "SigmaStudioFW.h"
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#include "driver/i2c_master.h"
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#include <string.h>
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static i2c_master_dev_handle_t s_dev = NULL;
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void sigma_studio_bind_i2c(int port, unsigned char addr7)
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{
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(void)port;
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(void)addr7;
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}
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void sigma_studio_set_device(void* i2cDevHandle)
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{
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s_dev = (i2c_master_dev_handle_t)i2cDevHandle;
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}
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void SIGMA_WRITE_REGISTER_BLOCK(unsigned char devAddress,
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unsigned int address,
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unsigned char length,
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ADI_REG_TYPE* pData)
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{
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(void)devAddress;
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if (s_dev == NULL || pData == NULL || length == 0U) {
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return;
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}
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enum { kChunk = 64U };
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unsigned int addr = address;
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unsigned char remaining = length;
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ADI_REG_TYPE* cursor = pData;
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while (remaining > 0U) {
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const unsigned char chunk =
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remaining > kChunk ? kChunk : remaining;
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unsigned char buf[2U + 64U];
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buf[0] = (unsigned char)((addr >> 8) & 0xFFU);
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buf[1] = (unsigned char)(addr & 0xFFU);
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memcpy(buf + 2U, cursor, chunk);
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i2c_master_transmit(s_dev, buf, (size_t)(2U + chunk), 1000);
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addr += chunk;
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cursor += chunk;
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remaining = (unsigned char)(remaining - chunk);
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}
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}
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/**
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* @file adau1701_program.c
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* @brief SigmaStudio default download for DigiRadio ADAU1701.
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*
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* DigiRadio firmware — https://github.com/manvalan/DigiRadio
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*
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* Copyright 2026 Michele Bigi
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* SPDX-License-Identifier: Apache-2.0
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*
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* @author Michele Bigi
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* @date 2026-07-06
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*/
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#include "SigmaStudioFW.h"
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#include "DigiRadio_IC_1.h"
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void adau1701_run_default_download(void)
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{
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default_download_IC_1();
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}
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/**
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* @file component_stub.cpp
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* @brief ADAU1701 driver component placeholder (Slice 5).
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*
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* DigiRadio firmware — https://github.com/manvalan/DigiRadio
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*
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* Copyright 2026 Michele Bigi
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* @author Michele Bigi
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* @date 2026-07-06
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*/
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namespace adau1701::detail {
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/**
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* @brief adau1701ComponentLinked — ensures the driver component links.
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*
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* @dname adau1701ComponentLinked
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* @return n/a (type)
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* @pubstate n/a
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*
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* @author Michele Bigi
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* @date 2026-07-06
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*/
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void adau1701ComponentLinked() noexcept {}
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} // namespace adau1701::detail
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