main.cpp

/*
 * This file is part of the SECCID distribution (https://github.com/ckahlo/seccid).
 * Copyright (c) 2023 - 2025 Christian Kahlo.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, version 3.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * DLR Exp.007
 * GlobalPlatform Secure Element CCID connector
 *
 */

#include "Arduino.h" // required for millis()
#include "ccid.h"
#include "seccid.h"

SECCID_USBD_CCID ccid0;

tusb_desc_device_qualifier_t desc_qualifier = { 10, TUSB_DESC_DEVICE_QUALIFIER, 0x0200, 0, 0, 0, 64, 1, 0 };
uint8_t const* tud_descriptor_device_qualifier_cb() { // Adafruit lacks device qualifier descriptor
	return (uint8_t*) &desc_qualifier;
}
//uint8_t const* tud_descriptor_other_speed_configuration_cb(uint8_t index){}

char usb_serial[8 + 4 + 2 + 2 + 16 + 1] = "000000002040"; // 4 RFU 0, RP2040

extern "C" void setup() {
	uint8_t chipVer = rp2040_chip_version(), romVer = rp2040_rom_version();
	usb_serial[12] = 0x30 + (chipVer >> 4);
	usb_serial[13] = 0x30 + (chipVer&0x0F);
	usb_serial[14] = 0x30 + (romVer >> 4);
	usb_serial[15] = 0x30 + (romVer&0x0F);
	pico_get_unique_board_id_string(&usb_serial[16], sizeof(usb_serial) - 16);

	TinyUSBDevice.setManufacturerDescriptor("DLR/CK");
	TinyUSBDevice.setProductDescriptor("Exp.007 SECCID");
	TinyUSBDevice.setSerialDescriptor(usb_serial);
	TinyUSBDevice.setID(USB_VID, USB_PID);
	TinyUSBDevice.setDeviceVersion(USB_DEV);

	ccid0.set_apdu_callback(process);
	ccid0.begin();

	bool usbConnected = (*(uint32_t*) (0x50110000 + 0x50)) & (1 << 16);
	while (usbConnected && !Serial && millis() < 1000) {
	}

	if(Serial) {
		Serial.println("DLR/CK Exp.007 SECCID booted.\n");
		Serial.flush();
	}
}

void tud_ccid_rx_cb(uint8_t itf) {
	if(itf == 0) {
		ccid0.process();
	}
}

extern "C" void loop() {
	if (Serial && Serial.available()) {
		String s = Serial.readString();
		Serial.printf("> %s\n", s.c_str());
	}

}