/* * SPDX-FileCopyrightText: 2025 M5Stack Technology CO LTD * * SPDX-License-Identifier: MIT */ /* Example using M5UnitUnified for ST25R3916 NFC-A Emulation mode */ #include #include #include #include #include #include // ************************************************************* // Choose ONE define symbol to match the unit you are using // NOTE: Emulation is supported ONLY on UnitNFC (ST25R3916) and CapCC1101NFC (ST25R3916). // UnitRFID2 (WS1850S) and M5Dial Builtin (WS1850S) do NOT support emulation. // ************************************************************* #if !defined(USING_UNIT_NFC) && !defined(USING_CAP_CC1101) // For UnitNFC (ST25R3916, I2C) // #define USING_UNIT_NFC // For CapCC1101NFC (ST25R3916, SPI) // #define USING_CAP_CC1101 #endif #if defined(USING_UNIT_RFID2) || defined(USING_M5DIAL_BUILTIN_WS1850S) #error Emulation is NOT supported on UnitRFID2 / M5Dial Builtin (WS1850S). Use UnitNFC or CapCC1101NFC. #endif using namespace m5::nfc; using namespace m5::nfc::a; using namespace m5::nfc::a::mifare; using namespace m5::nfc::a::mifare::classic; namespace { auto& lcd = M5.Display; m5::unit::UnitUnified Units; #if defined(USING_UNIT_NFC) #pragma message "Choose UnitNFC" m5::unit::UnitNFC unit{}; // I2C #elif defined(USING_CAP_CC1101) #pragma message "Choose CapCC1101NFC" m5::unit::CapCC1101NFC unit{}; // CapCC1101 (SPI) #else #error Choose unit please! #endif m5::nfc::EmulationLayerA emu_a{unit}; // constexpr Key keyA = DEFAULT_KEY; // Default as 0xFFFFFFFFFFFF // constexpr Key keyB = DEFAULT_KEY; // Default as 0xFFFFFFFFFFFF PICC picc{}; #define EMU_MIFARE_ULTRALIGHT // #define EMU_NTAG213 #if defined(EMU_MIFARE_ULTRALIGHT) constexpr Type type{Type::MIFARE_Ultralight}; constexpr uint8_t uid[] = {0x04, 0x34, 0x56, 0x78, 0x9A, 0xBC, 0xDE}; uint8_t picc_memory[] = { 0x00, 0x00, 0x00, 0x00, // 0x00, 0x00, 0x00, 0x00, // 0x00, 0xA3, 0x00, 0x00, // 0xE1, 0x10, 0x06, 0x00, // 0x03, 0x25, 0x91, 0x01, // 0x0D, 0x55, 0x04, 0x6D, // 0x35, 0x73, 0x74, 0x61, // 0x63, 0x6B, 0x2E, 0x63, // 0x6F, 0x6D, 0x2F, 0x51, // 0x01, 0x10, 0x54, 0x02, // 0x65, 0x6E, 0x48, 0x65, // 0x6C, 0x6C, 0x6F, 0x20, // 0x4D, 0x35, 0x53, 0x74, // 0x61, 0x63, 0x6B, 0xFE, // 0x44, 0x45, 0x46, 0x00, // 0x44, 0x45, 0x46, 0x00, // }; #elif defined(EMU_NTAG213) constexpr Type type{Type::NTAG_213}; constexpr uint8_t uid[] = {0x99, 0x88, 0x77, 0x66, 0x55, 0x44, 0x33}; uint8_t picc_memory[] = { 0x00, 0x00, 0x00, 0x00, // 0x00, 0x00, 0x00, 0x00, // 0x00, 0x48, 0x00, 0x00, // 0xE1, 0x10, 0x12, 0x00, // 0x01, 0x03, 0xA0, 0x0C, // 0x34, 0x03, 0x58, 0x91, // 0x01, 0x0D, 0x55, 0x04, // 0x6D, 0x35, 0x73, 0x74, // 0x61, 0x63, 0x6B, 0x2E, // 0x63, 0x6F, 0x6D, 0x2F, // 0x11, 0x01, 0x11, 0x54, // 0x02, 0x7A, 0x68, 0xE4, // 0xBD, 0xA0, 0xE5, 0xA5, // 0xBD, 0x20, 0x4D, 0x35, // 0x53, 0x74, 0x61, 0x63, // 0x6B, 0x11, 0x01, 0x10, // 0x54, 0x02, 0x65, 0x6E, // 0x48, 0x65, 0x6C, 0x6C, // 0x6F, 0x20, 0x4D, 0x35, // 0x53, 0x74, 0x61, 0x63, // 0x6B, 0x51, 0x01, 0x1A, // 0x54, 0x02, 0x6A, 0x61, // 0xE3, 0x81, 0x93, 0xE3, // 0x82, 0x93, 0xE3, 0x81, // 0xAB, 0xE3, 0x81, 0xA1, // 0xE3, 0x81, 0xAF, 0x20, // 0x4D, 0x35, 0x53, 0x74, // 0x61, 0x63, 0x6B, 0xFE, // 0x00, 0x00, 0x00, 0x00, // 0x00, 0x00, 0x00, 0x00, // 0x00, 0x00, 0x00, 0x00, // 0x00, 0x00, 0x00, 0x00, // 0x00, 0x00, 0x00, 0x00, // 0x00, 0x00, 0x00, 0x00, // 0x00, 0x00, 0x00, 0x00, // 0x00, 0x00, 0x00, 0x00, // 0x00, 0x00, 0x00, 0x00, // 0x00, 0x00, 0x00, 0x00, // 0x00, 0x00, 0x00, 0x00, // 0x00, 0x00, 0x00, 0x00, // 0x00, 0x00, 0x00, 0xBD, // 0x02, 0x00, 0x00, 0xFF, // 0x00, 0x00, 0x00, 0x00, // 0x00, 0x00, 0x00, 0x00, // 0x00, 0x00, 0x00, 0x00, // }; #else #error "Choose the target to emulate" #endif uint8_t bcc8(const uint8_t* p, const uint8_t len, const uint8_t init = 0) { uint8_t v = init; for (uint_fast8_t i = 0; i < len; ++i) { v ^= p[i]; } return v; } // Correctly embed the Ultralight and NTAG UIDs into memory void embed_uid(uint8_t mem[9], const uint8_t uid[7]) { memcpy(mem, uid, 3); mem[3] = bcc8(uid, 3, 0x88 /* CT */); memcpy(mem + 4, uid + 3, 4); mem[8] = bcc8(uid + 3, 4); } constexpr uint16_t color_table[] = { // None, Off, Idle, Ready, Active, Halt }; TFT_BLACK, TFT_RED, TFT_BLUE, TFT_YELLOW, TFT_GREEN, TFT_MAGENTA}; constexpr const char* state_table[] = {"-", "O", "I", "R", "A", "H"}; } // namespace void setup() { M5.begin(); M5.setTouchButtonHeightByRatio(100); // The screen shall be in landscape mode if (lcd.height() > lcd.width()) { lcd.setRotation(1); } // Emulation settings auto cfg = unit.config(); cfg.emulation = true; cfg.mode = NFC::A; unit.config(cfg); #if defined(USING_UNIT_NFC) auto board = M5.getBoard(); bool unit_ready{}; // NessoN1: port_b (GROVE) uses SoftwareI2C (M5HAL Bus) which causes I2C register // polling latency too high for ST25R3916 RF timing requirements. // Use QWIIC (port_a) with Wire instead. (Requires QWIIC-GROVE conversion cable) if (board == m5::board_t::board_M5NanoC6) { M5_LOGI("Using M5.Ex_I2C"); unit_ready = Units.add(unit, M5.Ex_I2C) && Units.begin(); } else { auto pin_num_sda = M5.getPin(m5::pin_name_t::port_a_sda); auto pin_num_scl = M5.getPin(m5::pin_name_t::port_a_scl); M5_LOGI("getPin: SDA:%u SCL:%u", pin_num_sda, pin_num_scl); Wire.end(); Wire.begin(pin_num_sda, pin_num_scl, 400 * 1000U); unit_ready = Units.add(unit, Wire) && Units.begin(); } if (!unit_ready) { M5_LOGE("Failed to begin"); lcd.fillScreen(TFT_RED); while (true) { m5::utility::delay(10000); } } #elif defined(USING_CAP_CC1101) if (!SPI.bus()) { auto spi_sclk = M5.getPin(m5::pin_name_t::sd_spi_sclk); auto spi_mosi = M5.getPin(m5::pin_name_t::sd_spi_mosi); auto spi_miso = M5.getPin(m5::pin_name_t::sd_spi_miso); M5_LOGI("getPin: %d,%d,%d", spi_sclk, spi_mosi, spi_miso); SPI.begin(spi_sclk, spi_miso, spi_mosi /* SS is shared SD, CC1101, ST25R3916 */); } SPISettings settings = {10000000, MSBFIRST, SPI_MODE1}; if (!Units.add(unit, SPI, settings) || !Units.begin()) { M5_LOGE("Failed to begin"); lcd.fillScreen(TFT_RED); while (true) { m5::utility::delay(10000); } } #endif M5_LOGI("M5UnitUnified initialized"); M5_LOGI("%s", Units.debugInfo().c_str()); lcd.setFont(&fonts::Font2); // lcd.startWrite(); lcd.fillScreen(TFT_RED); if (picc.emulate(type, uid, sizeof(uid))) { embed_uid(picc_memory, uid); if (emu_a.begin(picc, picc_memory, sizeof(picc_memory))) { lcd.fillScreen(TFT_DARKGREEN); lcd.setCursor(0, 16); const auto& e_picc = emu_a.emulatePICC(); M5.Log.printf("Emulation:%s %s ATQA:%04X SAK:%u\n", e_picc.typeAsString().c_str(), e_picc.uidAsString().c_str(), e_picc.atqa, e_picc.sak); lcd.printf("%s\n%s\nATQA:%04X SAK:%u", e_picc.typeAsString().c_str(), e_picc.uidAsString().c_str(), e_picc.atqa, e_picc.sak); } } lcd.fillRect(0, 0, 32, 16, color_table[0]); lcd.drawString(state_table[0], 0, 0); lcd.endWrite(); } void loop() { M5.update(); Units.update(); emu_a.update(); // Need call in loop static EmulationLayerA::State latest{}; auto state = emu_a.state(); if (latest != state) { latest = state; lcd.startWrite(); lcd.fillRect(0, 0, 32, 16, color_table[m5::stl::to_underlying(state)]); lcd.drawString(state_table[m5::stl::to_underlying(state)], 0, 0); lcd.endWrite(); } }