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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/FLASH/Write_Protection/main.c @ 89:fc21fb5b171b default tip

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Make error message more useful
author Daniel O'Connor <darius@dons.net.au>
date Fri, 13 Mar 2015 11:39:59 +1030
parents c59513fd84fb
children
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1 /**
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2 ******************************************************************************
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3 * @file FLASH/Write_Protection/main.c
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4 * @author MCD Application Team
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5 * @version V3.5.0
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6 * @date 08-April-2011
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7 * @brief Main program body
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8 ******************************************************************************
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9 * @attention
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10 *
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11 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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12 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
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13 * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
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14 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
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15 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
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16 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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17 *
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18 * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
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19 ******************************************************************************
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20 */
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21
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22 /* Includes ------------------------------------------------------------------*/
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23 #include "stm32f10x.h"
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24
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25 /** @addtogroup STM32F10x_StdPeriph_Examples
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26 * @{
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27 */
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28
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29 /** @addtogroup FLASH_Write_Protection
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30 * @{
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31 */
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32
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33 /* Private typedef -----------------------------------------------------------*/
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34 typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus;
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35
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36 /* Private define ------------------------------------------------------------*/
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37 /* Define the STM32F10x FLASH Page Size depending on the used device */
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38 #if defined (STM32F10X_HD) || defined (STM32F10X_HD_VL) || (STM32F10X_CL) || defined (STM32F10X_XL)
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39 #define FLASH_PAGE_SIZE ((uint16_t)0x800)
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40 #define FLASH_PAGES_TO_BE_PROTECTED (FLASH_WRProt_Pages12to13 | FLASH_WRProt_Pages14to15)
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41 #else
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42 #define FLASH_PAGE_SIZE ((uint16_t)0x400)
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43 #define FLASH_PAGES_TO_BE_PROTECTED (FLASH_WRProt_Pages24to27 | FLASH_WRProt_Pages28to31)
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44 #endif
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45
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46 #define BANK1_WRITE_START_ADDR ((uint32_t)0x08006000)
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47 #define BANK1_WRITE_END_ADDR ((uint32_t)0x08008000)
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48
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49 /* Uncomment this line to program the Falsh pages */
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50 //#define FLASH_PAGE_PROGRAM
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51 /* Uncomment this line to Enable Write Protection */
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52 //#define WRITE_PROTECTION_ENABLE
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53 /* Uncomment this line to Disable Write Protection */
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54 #define WRITE_PROTECTION_DISABLE
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55
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56 /* Private macro -------------------------------------------------------------*/
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57 /* Private variables ---------------------------------------------------------*/
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58 uint32_t EraseCounter = 0x0, Address = 0x0;
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59 uint16_t Data = 0x1753;
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60 uint32_t WRPR_Value = 0xFFFFFFFF, ProtectedPages = 0x0;
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61 uint32_t NbrOfPage;
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62 volatile FLASH_Status FLASHStatus = FLASH_COMPLETE;
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63 volatile TestStatus MemoryProgramStatus = PASSED;
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64
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65 /* Private function prototypes -----------------------------------------------*/
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66 /* Private functions ---------------------------------------------------------*/
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67
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68 /**
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69 * @brief Main program
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70 * @param None
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71 * @retval None
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72 */
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73 int main(void)
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74 {
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75 /*!< At this stage the microcontroller clock setting is already configured,
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76 this is done through SystemInit() function which is called from startup
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77 file (startup_stm32f10x_xx.s) before to branch to application main.
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78 To reconfigure the default setting of SystemInit() function, refer to
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79 system_stm32f10x.c file
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80 */
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81
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82 /* Unlock the Flash Program Erase controller */
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83 FLASH_Unlock();
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84
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85 /* Get pages write protection status */
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86 WRPR_Value = FLASH_GetWriteProtectionOptionByte();
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87
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88 #ifdef WRITE_PROTECTION_DISABLE
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89
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90 /* Get pages already write protected */
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91 ProtectedPages = ~(WRPR_Value | FLASH_PAGES_TO_BE_PROTECTED);
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92
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93 /* Check if desired pages are already write protected */
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94 if((WRPR_Value | (~FLASH_PAGES_TO_BE_PROTECTED)) != 0xFFFFFFFF )
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95 {
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96 /* Erase all the option Bytes */
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97 FLASHStatus = FLASH_EraseOptionBytes();
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98
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99 /* Check if there is write protected pages */
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100 if(ProtectedPages != 0x0)
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101 {
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102 /* Restore write protected pages */
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103 FLASHStatus = FLASH_EnableWriteProtection(ProtectedPages);
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104 }
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105 /* Generate System Reset to load the new option byte values */
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106 NVIC_SystemReset();
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107 }
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108
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109 #elif defined WRITE_PROTECTION_ENABLE
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110
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111 /* Get current write protected pages and the new pages to be protected */
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112 ProtectedPages = (~WRPR_Value) | FLASH_PAGES_TO_BE_PROTECTED;
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113
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114 /* Check if desired pages are not yet write protected */
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115 if(((~WRPR_Value) & FLASH_PAGES_TO_BE_PROTECTED )!= FLASH_PAGES_TO_BE_PROTECTED)
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116 {
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117
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118 /* Erase all the option Bytes because if a program operation is
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119 performed on a protected page, the Flash memory returns a
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120 protection error */
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121 FLASHStatus = FLASH_EraseOptionBytes();
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122
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123 /* Enable the pages write protection */
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124 FLASHStatus = FLASH_EnableWriteProtection(ProtectedPages);
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125
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126 /* Generate System Reset to load the new option byte values */
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127 NVIC_SystemReset();
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128 }
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129
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130 #endif
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131
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132 #ifdef FLASH_PAGE_PROGRAM
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133 /* Get the number of pages to be erased */
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134 NbrOfPage = (BANK1_WRITE_END_ADDR - BANK1_WRITE_START_ADDR) / FLASH_PAGE_SIZE;
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135
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136 /* The selected pages are not write protected */
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137 if ( (WRPR_Value & FLASH_PAGES_TO_BE_PROTECTED) != 0x00)
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138 {
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139 /* Clear All pending flags */
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140 FLASH_ClearFlag(FLASH_FLAG_BSY | FLASH_FLAG_EOP|FLASH_FLAG_PGERR |FLASH_FLAG_WRPRTERR);
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141
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142 /* erase the FLASH pages */
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143 for(EraseCounter = 0; (EraseCounter < NbrOfPage) && (FLASHStatus == FLASH_COMPLETE); EraseCounter++)
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144 {
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145 FLASHStatus = FLASH_ErasePage(BANK1_WRITE_START_ADDR + (FLASH_PAGE_SIZE * EraseCounter));
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146 }
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147
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148 /* FLASH Half Word program of data 0x1753 at addresses defined by BANK1_WRITE_START_ADDR and BANK1_WRITE_END_ADDR */
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149 Address = BANK1_WRITE_START_ADDR;
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150
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151 while((Address < BANK1_WRITE_END_ADDR) && (FLASHStatus == FLASH_COMPLETE))
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152 {
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153 FLASHStatus = FLASH_ProgramHalfWord(Address, Data);
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154 Address = Address + 2;
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155 }
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156
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157 /* Check the correctness of written data */
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158 Address = BANK1_WRITE_START_ADDR;
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159
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160 while((Address < BANK1_WRITE_END_ADDR) && (MemoryProgramStatus != FAILED))
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161 {
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162 if((*(__IO uint16_t*) Address) != Data)
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163 {
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164 MemoryProgramStatus = FAILED;
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165 }
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166 Address += 2;
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167 }
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168 }
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169 else
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170 {
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171 /* Error to program the flash : The desired pages are write protected */
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172 MemoryProgramStatus = FAILED;
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173 }
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174
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175 #endif
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176
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177 while (1)
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178 {
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179 }
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180 }
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181
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182 #ifdef USE_FULL_ASSERT
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183
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184 /**
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185 * @brief Reports the name of the source file and the source line number
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186 * where the assert_param error has occurred.
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187 * @param file: pointer to the source file name
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188 * @param line: assert_param error line source number
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189 * @retval None
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190 */
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191 void assert_failed(uint8_t* file, uint32_t line)
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192 {
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193 /* User can add his own implementation to report the file name and line number,
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194 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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195
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196 while (1)
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197 {
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198 }
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199 }
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200
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201 #endif
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202
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203 /**
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204 * @}
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205 */
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206
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207 /**
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208 * @}
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209 */
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210
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211 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/