67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2012 Karl Palsson <karlp@ŧweak.net.au>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libopencm3/stm32/desig.h>
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void desig_get_unique_id_as_string(char *string, unsigned int string_len)
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{
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int i, len;
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uint32_t uid_buf[3];
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uint8_t *uid = (uint8_t *)uid_buf;
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const char chars[] = "0123456789ABCDEF";
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desig_get_unique_id(uid_buf);
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/* Each byte produces two characters */
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len = (2 * sizeof(uid_buf) < string_len) ?
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2 * sizeof(uid_buf) : string_len - 1;
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for (i = 0; i < len; i += 2) {
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string[i] = chars[(uid[i / 2] >> 4) & 0x0F];
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string[i + 1] = chars[(uid[i / 2] >> 0) & 0x0F];
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}
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string[len] = '\0';
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}
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void desig_get_unique_id_as_dfu(char *string) {
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uint32_t uid_buf[3];
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uint8_t *uid = (uint8_t *)uid_buf;
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desig_get_unique_id(uid_buf);
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uint8_t serial[6];
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serial[0] = uid[11];
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serial[1] = uid[10] + uid[2];
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serial[2] = uid[9];
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serial[3] = uid[8] + uid[0];
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serial[4] = uid[7];
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serial[5] = uid[6];
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uint8_t *ser = &serial[0];
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uint8_t *end = &serial[6];
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const char hex_digit[] = "0123456789ABCDEF";
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for (; ser < end; ser++) {
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*string++ = hex_digit[(*ser >> 4) & 0x0f];
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*string++ = hex_digit[(*ser >> 0) & 0x0f];
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}
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*string = '\0';
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}
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