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comparison libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/FLASH/Write_Protection/main.c @ 0:c59513fd84fb

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Initial commit of STM32 test code.
author Daniel O'Connor <darius@dons.net.au>
date Mon, 03 Oct 2011 21:19:15 +1030
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1 /**
2 ******************************************************************************
3 * @file FLASH/Write_Protection/main.c
4 * @author MCD Application Team
5 * @version V3.5.0
6 * @date 08-April-2011
7 * @brief Main program body
8 ******************************************************************************
9 * @attention
10 *
11 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
12 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
13 * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
14 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
15 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
16 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
17 *
18 * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
19 ******************************************************************************
20 */
21
22 /* Includes ------------------------------------------------------------------*/
23 #include "stm32f10x.h"
24
25 /** @addtogroup STM32F10x_StdPeriph_Examples
26 * @{
27 */
28
29 /** @addtogroup FLASH_Write_Protection
30 * @{
31 */
32
33 /* Private typedef -----------------------------------------------------------*/
34 typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus;
35
36 /* Private define ------------------------------------------------------------*/
37 /* Define the STM32F10x FLASH Page Size depending on the used device */
38 #if defined (STM32F10X_HD) || defined (STM32F10X_HD_VL) || (STM32F10X_CL) || defined (STM32F10X_XL)
39 #define FLASH_PAGE_SIZE ((uint16_t)0x800)
40 #define FLASH_PAGES_TO_BE_PROTECTED (FLASH_WRProt_Pages12to13 | FLASH_WRProt_Pages14to15)
41 #else
42 #define FLASH_PAGE_SIZE ((uint16_t)0x400)
43 #define FLASH_PAGES_TO_BE_PROTECTED (FLASH_WRProt_Pages24to27 | FLASH_WRProt_Pages28to31)
44 #endif
45
46 #define BANK1_WRITE_START_ADDR ((uint32_t)0x08006000)
47 #define BANK1_WRITE_END_ADDR ((uint32_t)0x08008000)
48
49 /* Uncomment this line to program the Falsh pages */
50 //#define FLASH_PAGE_PROGRAM
51 /* Uncomment this line to Enable Write Protection */
52 //#define WRITE_PROTECTION_ENABLE
53 /* Uncomment this line to Disable Write Protection */
54 #define WRITE_PROTECTION_DISABLE
55
56 /* Private macro -------------------------------------------------------------*/
57 /* Private variables ---------------------------------------------------------*/
58 uint32_t EraseCounter = 0x0, Address = 0x0;
59 uint16_t Data = 0x1753;
60 uint32_t WRPR_Value = 0xFFFFFFFF, ProtectedPages = 0x0;
61 uint32_t NbrOfPage;
62 volatile FLASH_Status FLASHStatus = FLASH_COMPLETE;
63 volatile TestStatus MemoryProgramStatus = PASSED;
64
65 /* Private function prototypes -----------------------------------------------*/
66 /* Private functions ---------------------------------------------------------*/
67
68 /**
69 * @brief Main program
70 * @param None
71 * @retval None
72 */
73 int main(void)
74 {
75 /*!< At this stage the microcontroller clock setting is already configured,
76 this is done through SystemInit() function which is called from startup
77 file (startup_stm32f10x_xx.s) before to branch to application main.
78 To reconfigure the default setting of SystemInit() function, refer to
79 system_stm32f10x.c file
80 */
81
82 /* Unlock the Flash Program Erase controller */
83 FLASH_Unlock();
84
85 /* Get pages write protection status */
86 WRPR_Value = FLASH_GetWriteProtectionOptionByte();
87
88 #ifdef WRITE_PROTECTION_DISABLE
89
90 /* Get pages already write protected */
91 ProtectedPages = ~(WRPR_Value | FLASH_PAGES_TO_BE_PROTECTED);
92
93 /* Check if desired pages are already write protected */
94 if((WRPR_Value | (~FLASH_PAGES_TO_BE_PROTECTED)) != 0xFFFFFFFF )
95 {
96 /* Erase all the option Bytes */
97 FLASHStatus = FLASH_EraseOptionBytes();
98
99 /* Check if there is write protected pages */
100 if(ProtectedPages != 0x0)
101 {
102 /* Restore write protected pages */
103 FLASHStatus = FLASH_EnableWriteProtection(ProtectedPages);
104 }
105 /* Generate System Reset to load the new option byte values */
106 NVIC_SystemReset();
107 }
108
109 #elif defined WRITE_PROTECTION_ENABLE
110
111 /* Get current write protected pages and the new pages to be protected */
112 ProtectedPages = (~WRPR_Value) | FLASH_PAGES_TO_BE_PROTECTED;
113
114 /* Check if desired pages are not yet write protected */
115 if(((~WRPR_Value) & FLASH_PAGES_TO_BE_PROTECTED )!= FLASH_PAGES_TO_BE_PROTECTED)
116 {
117
118 /* Erase all the option Bytes because if a program operation is
119 performed on a protected page, the Flash memory returns a
120 protection error */
121 FLASHStatus = FLASH_EraseOptionBytes();
122
123 /* Enable the pages write protection */
124 FLASHStatus = FLASH_EnableWriteProtection(ProtectedPages);
125
126 /* Generate System Reset to load the new option byte values */
127 NVIC_SystemReset();
128 }
129
130 #endif
131
132 #ifdef FLASH_PAGE_PROGRAM
133 /* Get the number of pages to be erased */
134 NbrOfPage = (BANK1_WRITE_END_ADDR - BANK1_WRITE_START_ADDR) / FLASH_PAGE_SIZE;
135
136 /* The selected pages are not write protected */
137 if ( (WRPR_Value & FLASH_PAGES_TO_BE_PROTECTED) != 0x00)
138 {
139 /* Clear All pending flags */
140 FLASH_ClearFlag(FLASH_FLAG_BSY | FLASH_FLAG_EOP|FLASH_FLAG_PGERR |FLASH_FLAG_WRPRTERR);
141
142 /* erase the FLASH pages */
143 for(EraseCounter = 0; (EraseCounter < NbrOfPage) && (FLASHStatus == FLASH_COMPLETE); EraseCounter++)
144 {
145 FLASHStatus = FLASH_ErasePage(BANK1_WRITE_START_ADDR + (FLASH_PAGE_SIZE * EraseCounter));
146 }
147
148 /* FLASH Half Word program of data 0x1753 at addresses defined by BANK1_WRITE_START_ADDR and BANK1_WRITE_END_ADDR */
149 Address = BANK1_WRITE_START_ADDR;
150
151 while((Address < BANK1_WRITE_END_ADDR) && (FLASHStatus == FLASH_COMPLETE))
152 {
153 FLASHStatus = FLASH_ProgramHalfWord(Address, Data);
154 Address = Address + 2;
155 }
156
157 /* Check the correctness of written data */
158 Address = BANK1_WRITE_START_ADDR;
159
160 while((Address < BANK1_WRITE_END_ADDR) && (MemoryProgramStatus != FAILED))
161 {
162 if((*(__IO uint16_t*) Address) != Data)
163 {
164 MemoryProgramStatus = FAILED;
165 }
166 Address += 2;
167 }
168 }
169 else
170 {
171 /* Error to program the flash : The desired pages are write protected */
172 MemoryProgramStatus = FAILED;
173 }
174
175 #endif
176
177 while (1)
178 {
179 }
180 }
181
182 #ifdef USE_FULL_ASSERT
183
184 /**
185 * @brief Reports the name of the source file and the source line number
186 * where the assert_param error has occurred.
187 * @param file: pointer to the source file name
188 * @param line: assert_param error line source number
189 * @retval None
190 */
191 void assert_failed(uint8_t* file, uint32_t line)
192 {
193 /* User can add his own implementation to report the file name and line number,
194 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
195
196 while (1)
197 {
198 }
199 }
200
201 #endif
202
203 /**
204 * @}
205 */
206
207 /**
208 * @}
209 */
210
211 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/