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1 /**
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2 * |----------------------------------------------------------------------
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3 * | Copyright (C) Tilen Majerle, 2014
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4 * |
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5 * | This program is free software: you can redistribute it and/or modify
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6 * | it under the terms of the GNU General Public License as published by
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7 * | the Free Software Foundation, either version 3 of the License, or
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8 * | any later version.
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9 * |
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10 * | This program is distributed in the hope that it will be useful,
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11 * | but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 * | GNU General Public License for more details.
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14 * |
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15 * | You should have received a copy of the GNU General Public License
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16 * | along with this program. If not, see <http://www.gnu.org/licenses/>.
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17 * |----------------------------------------------------------------------
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18 */
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19 #include "tm_stm32f4_otp.h"
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20
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21 HAL_StatusTypeDef TM_OTP_Write(uint8_t block, uint8_t byte, uint8_t data)
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22 {
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23 HAL_StatusTypeDef answer;
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24
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25 /* Check input parameters */
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26 if (
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27 block >= OTP_BLOCKS ||
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28 byte >= OTP_BYTES_IN_BLOCK
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29 ) {
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30 /* Invalid parameters */
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31 return HAL_ERROR;
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32 }
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33
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34 if(*(uint8_t *)(OTP_START_ADDR + block * OTP_BYTES_IN_BLOCK + byte) != 0xFF)
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35 return HAL_ERROR;
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36
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37 /* Unlock FLASH */
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38 HAL_FLASH_Unlock();
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39
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40 answer = HAL_FLASH_Program(FLASH_TYPEPROGRAM_BYTE, (OTP_START_ADDR + block * OTP_BYTES_IN_BLOCK + byte), data);
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41
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42 /* Lock FLASH */
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43 HAL_FLASH_Lock();
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44
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45 return answer;
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46 }
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47
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48
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49 uint8_t TM_OTP_Read(uint8_t block, uint8_t byte) {
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50 uint8_t data;
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51
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52 /* Check input parameters */
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53 if (
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54 block >= OTP_BLOCKS ||
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55 byte >= OTP_BYTES_IN_BLOCK
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56 ) {
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57 /* Invalid parameters */
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58 return HAL_ERROR;
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59 }
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60
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61 /* Get value */
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62 data = *(__IO uint8_t *)(OTP_START_ADDR + block * OTP_BYTES_IN_BLOCK + byte);
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63
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64 /* Return data */
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65 return data;
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66 }
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