stm32L152 使用内部内部flash做EEPROM 出FLASH_ERROR_WRP问题及

最近做个modbus网关，用到的MCU是stm32L152，这个项目是和别人合作，我做顶层的算法和从机协议，从机读回来的数据要存到外部flash中，而外部flash的索引地址要保存到内部的eeprom中，底层驱动合作方已经写好了，直接拿来使用。测试代码如下：

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FLASH_Status writeEEPROMByte(uint32_t address,uint8_t data) {

FLASH_Status status = FLASH_COMPLETE;

address = address + EEPROM_START_ADDR;

DATA_EEPROM_Unlock(); //Unprotect the EEPROM to allow writing

????

????while(FLASH_GetStatus()!=FLASH_COMPLETE);

???? ?

status = DATA_EEPROM_ProgramByte(address,data);

DATA_EEPROM_Lock(); // Reprotect the EEPROM

return status;

}

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uint8_t readEEPROMByte(uint32_t address) {

uint8_t tmp = 0;

address = address + EEPROM_START_ADDR;

tmp = *(__IO uint32_t*)address;

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return tmp;

}

/*********************************************************************************

* Function Name : initAddrParameter

* Output : none

* Return : None

**********************************************************************************/

void initAddrParameter(void)

{

????????if(GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_0) == 1)

//????if(readEEPROMByte(0x24) == 0x55)

????{

????

????????writeEEPROMByte(0x24,0x55); ????????????????????

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????????initParameter();

????????W25QXX_Erase_Sector(0);

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????}else

????{

????????//?áêy?Yμ??·

????????write_Addr.wBlock_Addr = readEEPROMByte(0x00);????????????????????// 0-255

????????write_Addr.wSector_Addr = readEEPROMByte(0x04);

????????write_Addr.wPage_Addr = readEEPROMByte(0x08);

????????write_Addr.wOffset_Addr = readEEPROMByte(0x0c);

????????write_Addr.wOver_take = readEEPROMByte(0x10);

????????

????????read_Addr.rBlock_Addr = readEEPROMByte(0x14);

????????read_Addr.rSector_Addr = readEEPROMByte(0x18);

????????read_Addr.rPage_Addr = readEEPROMByte(0x1c);????

????????read_Addr.rOffset_Addr = readEEPROMByte(0x20);????????

????}

//????????initParameter();

//????????W25QXX_Erase_Sector(0);

//????

}

void saveAddrParameter(void)

{

FLASH_Status status = FLASH_COMPLETE;

????????u8 tempaddr = 0;

????????__disable_irq() ;

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????

//????

????writeEEPROMByte(0x00,write_Addr.wBlock_Addr); ????????????????????// 0-255

????writeEEPROMByte(0x04,write_Addr.wSector_Addr); ????????????????????

????writeEEPROMByte(0x08,write_Addr.wPage_Addr); ????????????????????

????writeEEPROMByte(0x0c,write_Addr.wOffset_Addr); ????????????????

????writeEEPROMByte(0x10,write_Addr.wOver_take); ????????????????????

????

????tempaddr = read_Addr.rBlock_Addr;

????status= writeEEPROMByte(0x14,2);

????tempaddr = read_Addr.rSector_Addr;

????status=????writeEEPROMByte(0x18,9);

????tempaddr = read_Addr.rPage_Addr;

????status=????writeEEPROMByte(0x1c,6);

????tempaddr = read_Addr.rOffset_Addr;

????status=????writeEEPROMByte(0x20,1);

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????__enable_irq() ;

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}

读写测试OK

当把该程序加主程序中，从机读取完数据要保存时调用saveAddrParameter（）函数出现 FLASH_ERROR_WRP 错误

调用改函数后 在往 flash 中写数据 就会发生错误。

经过一晚上的反复调试终于确定了错误。

在readDataFromFlash()中 调用了readWriteConpare这个参数

然后就出现了错误。

细心的朋友 ，我想已经发现了错误。

上层函数调用的时候传递进来的参数是NULL ，也就是说 PeerAddr是空

而我在这个函数中给空赋值，导致出错，也就是出现ASH_ERROR_WR 的病根，本身读写程序并没有错误。

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给朋友们提个醒，传递指针的时候要格外小心，看清楚，找个错误很是费时间啊！！