/* * This file is part of the libopencm3 project. * * Copyright (C) 2012 Karl Palsson * * This library is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This library 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this library. If not, see . */ #include uint16_t desig_get_flash_size(void) { return DESIG_FLASH_SIZE; } void desig_get_unique_id(uint32_t *result) { *result++ = DESIG_UNIQUE_ID2; *result++ = DESIG_UNIQUE_ID1; *result = DESIG_UNIQUE_ID0; } void desig_get_unique_id_as_string(char *string, unsigned int string_len) { int i, len; uint32_t dev_id_buf[3]; uint8_t *device_id = (uint8_t *)dev_id_buf; const char chars[] = "0123456789ABCDEF"; desig_get_unique_id(dev_id_buf); /* Each byte produces two characters */ len = (2 * sizeof(dev_id_buf) < string_len) ? 2 * sizeof(dev_id_buf) : string_len - 1; for (i = 0; i < len; i += 2) { string[i] = chars[(device_id[i / 2] >> 4) & 0x0F]; string[i + 1] = chars[(device_id[i / 2] >> 0) & 0x0F]; } string[len] = '\0'; } /** * Generate a serial number from the unique id registers as the DFU bootloader. * This document: http://www.usb.org/developers/docs/devclass_docs/usbmassbulk_10.pdf * says that the serial number has to be at least 12 digits long and that * the last 12 digits need to be unique. It also stipulates that the valid * character set is that of upper-case hexadecimal digits. * The onboard DFU bootloader produces a 12-digit serial based on the * 96-bit unique ID. Show the serial with ```dfu-util -l``` while the * MCU is in DFU mode. * @see https://my.st.com/52d187b7 for the algorithim used. * @param string pointer to store serial in, must be at least 13 bytes */ void desig_get_unique_id_as_dfu(char *string) { uint8_t *id = (uint8_t *)DESIG_UNIQUE_ID_BASE; uint8_t serial[6]; serial[0] = id[11]; serial[1] = id[10] + id[2]; serial[2] = id[9]; serial[3] = id[8] + id[0]; serial[4] = id[7]; serial[5] = id[6]; uint8_t *ser = &serial[0]; uint8_t *end = &serial[6]; const char hex_digit[] = "0123456789ABCDEF"; for (; ser < end; ser++) { *string++ = hex_digit[(*ser >> 4) & 0x0f]; *string++ = hex_digit[(*ser >> 0) & 0x0f]; } *string = '\0'; }