Função operacional do Flash interno STM32

  Os artigos da série de atualização remota IAP são os seguintes:

  1. Descrição do mecanismo de atualização remota IAP

  2. Implementação de código de salto entre Bootload e App

  3. Funções operacionais do Flash interno STM32
 

Interface de função do flash interno operacional STM32

#include "inFlash.h"
#include "stm32f10x_flash.h"

/*!
 *  功  能: 不检查的写入内部Flash
 *  param1: 起始地址
 *  param2: 要写入的数据指针
 *  param3: 要写入的数据的个数  
 *  return: 无返回值
 */
void InFlashWriteNoCheck(uint32_t writeAddr, uint16_t *pBuffer, uint16_t numToWrite)   
{
    
     			 		 
	uint16_t i;
	
	for(i=0; i<numToWrite; i++)
	{
    
    
		FLASH_ProgramHalfWord(writeAddr, pBuffer[i]);  //在指定的地址写入半字
	    writeAddr += 2;  //地址增加2.
	}  
} 

/*!
 *  功  能: 从指定地址开始写入指定长度的数据
 *  param1: 起始地址(此地址必须为2的倍数!!)
 *  param2: 要写入的数据指针
 *  param3: 半字(16位)数 (就是要写入的16位数据的个数.) 
 *  return: 成功返回 0
 *          失败返回 -1
 */
int InFlashWrite(uint32_t writeAddr, uint8_t *pBuffer, uint16_t numToWrite)	
{
    
    
    uint16_t i, temp = 0;

	  // 先判断地址是否合法
	  if(writeAddr<INFLASH_START_ADDR || (writeAddr>=(INFLASH_START_ADDR + INFLASH_TOTAL_SIZE * 1024)))
	  {
    
    
		    return -1;  
	  }
	
	  FLASH_Unlock();	 // 解锁
    FLASH_SetLatency(FLASH_Latency_2);  // 因为系统时钟为72M所以要设置两个时钟周期的延时
    
    FLASH_ClearFlag(FLASH_FLAG_BSY | FLASH_FLAG_PGERR | FLASH_FLAG_WRPRTERR | FLASH_FLAG_EOP);
    
    // 写入页之前要擦除整页,并判断是否擦除成功
    while(FLASH_ErasePage(writeAddr) != FLASH_COMPLETE);
    
    // 写入数据，小端存储，数据的高字节保存在高地址
    if(numToWrite == 1)
    {
    
    
        temp |= pBuffer[0];
        while(FLASH_ProgramHalfWord(writeAddr, temp) != FLASH_COMPLETE);      //判断是否写入成功 
    }
    else
    {
    
    
        for(i=0; i<numToWrite; i++)  // 按照半字写入
        {
    
    
            temp = (pBuffer[2*i+1]<<8) | pBuffer[2*i];            //2个字节整合为1个半字
            while(FLASH_ProgramHalfWord(writeAddr, temp) != FLASH_COMPLETE);      //判断是否写入成功 
            writeAddr += 2;     // 地址要加2，因为每次写入的是2个字节(1个半字)
        }
    }
    
	  FLASH_Lock();  // 上锁
    
    return 0;
}

/*!
 *  功  能: 读取指定地址的半字(16位数据)
 *  param1: 读地址(此地址必须为2的倍数!!)
 *  return: 读取到的数据
 */
uint16_t InFlashReadHalfWord(uint32_t faddr)
{
    
    
	  return *(uint16_t*)faddr; 
}

/*!
 *  功  能: 从指定地址开始读出指定长度的数据
 *  param1: 起始地址(此地址必须为2的倍数!!)
 *  param2: 要保存的缓冲区的地址
 *  param3: 要读取的半字(16位)数 (就是要读取的16位数据的个数.) 
 *  return: 无返回值
 */
void InFlashRead(uint32_t readAddr, uint16_t *pBuffer, uint16_t numToRead)   	
{
    
    
	  uint16_t i;
	
	  for(i = 0; i < numToRead; i++)
	  {
    
    
		    pBuffer[i] = InFlashReadHalfWord(readAddr);  //读取2个字节.
		    readAddr += 2;  //偏移2个字节.	
	  }
}

/*!
 *  功  能: 测试函数,往内部Flash写入一个字节的数据
 *  param1: 起始地址
 *  param2: 要写入的数据
 *  return: 成功返回0
 */
int InFlashWriteChar(uint32_t writeAddr, uint8_t writeData)   	
{
    
    
	  return InFlashWrite(writeAddr, &writeData, 1);  //写入一个字 
}