61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
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/*
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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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uint16_t desig_get_flash_size(void)
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{
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return DESIG_FLASH_SIZE;
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}
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void desig_get_unique_id(uint32_t result[])
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{
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/* Could also just return a pointer to the start? read it as they wish?
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*/
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uint16_t bits15_0 = DESIG_UID_15_0;
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uint32_t bits31_16 = DESIG_UID_31_16;
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uint32_t bits63_32 = DESIG_UID_63_32;
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uint32_t bits95_64 = DESIG_UID_95_64;
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result[0] = bits95_64;
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result[1] = bits63_32;
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result[2] = bits31_16 << 16 | bits15_0;
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}
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void desig_get_unique_id_as_string(char *string,
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unsigned int string_len)
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{
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int i, len;
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uint8_t device_id[12];
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static const char chars[] = "0123456789ABCDEF";
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desig_get_unique_id((uint32_t *)device_id);
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/* Each byte produces two characters */
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len = (2 * sizeof(device_id) < string_len) ?
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2 * sizeof(device_id) : string_len - 1;
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for (i = 0; i < len; i += 2) {
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string[i] = chars[(device_id[i / 2] >> 0) & 0x0F];
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string[i + 1] = chars[(device_id[i / 2] >> 4) & 0x0F];
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}
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string[len] = '\0';
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}
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