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发表于 2015-1-5 14:43:42
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自己提的问题自己回答吧。我现在用的STM32030F4根据手册FLASH地址
下面附”内部FLASH写保护“程序开始试的时候忘了写按键去除写保护，导致报废一个芯片，写保护后芯片就不可烧录了。（我是通过一个开机键，学习米健操作连击10次以上可以解除”写保护“）
部分代码如下
#include "bsp_data.h"
#include "stm32f0xx_flash.h"
/* Private typedef -----------------------------------------------------------*/
typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus;
u8 protect_flag =0 ;
/* Private define ------------------------------------------------------------*/
#ifdef STM32F030
#define FLASH_PAGE_SIZE ((uint16_t)0x2000)
#define FLASH_PAGES_TO_BE_PROTECTED (OB_WRP_Pages0to3 | OB_WRP_Pages4to7 | OB_WRP_Pages8to11 |\
OB_WRP_Pages12to15 | OB_WRP_Pages16to19 | OB_WRP_Pages20to23 |\
OB_WRP_Pages24to27 | OB_WRP_Pages28to31 | OB_WRP_Pages32to35 |\
OB_WRP_Pages36to39 | OB_WRP_Pages40to43 | OB_WRP_Pages44to47 |\
OB_WRP_Pages48to51 | OB_WRP_Pages52to55 | OB_WRP_Pages56to59 |\
OB_WRP_Pages60to63) /*OB_WRP_AllPages*/
#else
#define FLASH_PAGE_SIZE ((uint16_t)0x2000)
#define FLASH_PAGES_TO_BE_PROTECTED (OB_WRP_Pages0to3 | OB_WRP_Pages4to7 | OB_WRP_Pages8to11 |\
OB_WRP_Pages12to15 | OB_WRP_Pages16to19 | OB_WRP_Pages20to23 |\
OB_WRP_Pages24to27 | OB_WRP_Pages28to31 | OB_WRP_Pages32to35 |\
OB_WRP_Pages36to39 | OB_WRP_Pages40to43 | OB_WRP_Pages44to47 |\
OB_WRP_Pages48to51 | OB_WRP_Pages52to55 | OB_WRP_Pages56to59 |\
OB_WRP_Pages60to63) /*OB_WRP_AllPages*/
#endif /* STM32F030 */
#define BANK1_WRITE_START_ADDR ((uint32_t)0x08006000)
#define BANK1_WRITE_END_ADDR ((uint32_t)0x08010000)
/* Uncomment this line to program the Flash pages */
//#define FLASH_PAGE_PROGRAM
/* Uncomment this line to Enable Write Protection */
#define WRITE_PROTECTION_ENABLE
/* Uncomment this line to Disable Write Protection */
//#define WRITE_PROTECTION_DISABLE
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
uint32_t EraseCounter = 0x0, Address = 0x0;
uint16_t Data = 0x1753;
uint32_t WRPR_Value = 0xFFFFFFFF, ProtectedPages = 0x0;
uint32_t NbrOfPage;
__IO FLASH_Status FLASHStatus = FLASH_COMPLETE;
__IO TestStatus MemoryProgramStatus = PASSED;
/*****************main****************/
int main(void)
{
All_Init();
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f0xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f0xx.c file
*/
/* Unlock the Flash Program Erase controller */
FLASH_Unlock();
FLASH_OB_Unlock();
FLASH_ClearFlag(FLASH_FLAG_EOP | FLASH_FLAG_PGERR | FLASH_FLAG_WRPERR);
/* Get pages write protection status */
WRPR_Value = FLASH_OB_GetWRP();
#ifdef WRITE_PROTECTION_DISABLE
/* Get pages already write protected */
ProtectedPages = ~(WRPR_Value | FLASH_PAGES_TO_BE_PROTECTED);
/* Check if desired pages are already write protected */
if((WRPR_Value | (~FLASH_PAGES_TO_BE_PROTECTED)) != 0xFFFFFFFF )
{
/* Erase all the option Bytes */
FLASHStatus = FLASH_OB_Erase();
/* Check if there is write protected pages */
if(ProtectedPages != 0x0)
{
/* Restore write protected pages */
FLASHStatus = FLASH_OB_EnableWRP(ProtectedPages);
}
/* Generate System Reset to load the new option byte values */
FLASH_OB_Launch();
}
#elif defined WRITE_PROTECTION_ENABLE
/* Get current write protected pages and the new pages to be protected */
ProtectedPages = (~WRPR_Value) | FLASH_PAGES_TO_BE_PROTECTED;
/* Check if desired pages are not yet write protected */
if(((~WRPR_Value) & FLASH_PAGES_TO_BE_PROTECTED )!= FLASH_PAGES_TO_BE_PROTECTED)
{
/* Erase all the option Bytes because if a program operation is
performed on a protected page, the Flash memory returns a
protection error */
FLASHStatus = FLASH_OB_Erase();
/* Enable the pages write protection */
FLASHStatus = FLASH_OB_EnableWRP(ProtectedPages);
/* Generate System Reset to load the new option byte values */
FLASH_OB_Launch();
}
#endif /* WRITE_PROTECTION_DISABLE */
#ifdef FLASH_PAGE_PROGRAM
/* Get the number of pages to be erased */
NbrOfPage = (BANK1_WRITE_END_ADDR - BANK1_WRITE_START_ADDR) / FLASH_PAGE_SIZE;
/* The selected pages are not write protected */
if ( (WRPR_Value & FLASH_PAGES_TO_BE_PROTECTED) != 0x00)
{
/* Clear pending flags */
FLASH_ClearFlag(FLASH_FLAG_EOP|FLASH_FLAG_PGERR |FLASH_FLAG_WRPERR);
/* erase the FLASH pages */
for(EraseCounter = 0; (EraseCounter < NbrOfPage) && (FLASHStatus == FLASH_COMPLETE); EraseCounter++)
{
FLASHStatus = FLASH_ErasePage(BANK1_WRITE_START_ADDR + (FLASH_PAGE_SIZE * EraseCounter));
}
/* FLASH Half Word program of data 0x1753 at addresses defined by BANK1_WRITE_START_ADDR and BANK1_WRITE_END_ADDR */
Address = BANK1_WRITE_START_ADDR;
while((Address < BANK1_WRITE_END_ADDR) && (FLASHStatus == FLASH_COMPLETE))
{
FLASHStatus = FLASH_ProgramHalfWord(Address, Data);
Address = Address + 2;
}
/* Check the correctness of written data */
Address = BANK1_WRITE_START_ADDR;
while((Address < BANK1_WRITE_END_ADDR) && (MemoryProgramStatus != FAILED))
{
if((*(__IO uint16_t*) Address) != Data)
{
MemoryProgramStatus = FAILED;
}
Address += 2;
}
}
else
{
/* Error to program the flash : The desired pages are write protected */
MemoryProgramStatus = FAILED;
}
#endif /* FLASH_PAGE_PROGRAM */
while (1)
{
Whole_Process();
if(protect_flag>3)
{
/* Get pages already write protected */
ProtectedPages = ~(WRPR_Value | FLASH_PAGES_TO_BE_PROTECTED);
/* Check if desired pages are already write protected */
if((WRPR_Value | (~FLASH_PAGES_TO_BE_PROTECTED)) != 0xFFFFFFFF )
{
/* Erase all the option Bytes */
FLASHStatus = FLASH_OB_Erase();
/* Check if there is write protected pages */
if(ProtectedPages != 0x0)
{
/* Restore write protected pages */
FLASHStatus = FLASH_OB_EnableWRP(ProtectedPages);
}
/* Generate System Reset to load the new option byte values */
FLASH_OB_Launch();
}
}
}
}
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发表于 2015-1-5 14:43:41
