使用STM8L
芯片、W25Q16Flash,先将要存储的扇区1数据读出放入备用扇区0,将数据修改后,再讲修改的数据和备用扇区0的数据,存回扇区1,但是存储的过程中,要么数据存不进去,要么存入的数据有问题,请各位帮忙看下是什么问题?
- void Write_Admin_Passord(uc *p,uc passordNum)
- {
- ui i,n;
- uc flashBuffer[256];
-
- W25q16_Erasure(0);
-
- for(n = 0;n < 16;n++)
- {
- W25Q16_Read(4096+n*256,flashBuffer,256);
-
- W25Q16_Write(n*256,flashBuffer,256);
- }
- W25q16_Erasure(1);
- W25Q16_Read(4096,flashBuffer,256);
-
- for(i = 0;i < passordNum;i++)
- flashBuffer[i] = p[i];
-
- W25Q16_Write(4096,flashBuffer,256);
-
- for(n = 1;n < 16;n++)
- {
- W25Q16_Read(n*256,flashBuffer,256);
-
- W25Q16_Write(4096+n*256,flashBuffer,256);
- }
- }
复制代码- void W25Q16_Write(ul address,uc *data,ui j)
- {
- ui i;
- while(W25_Read_Busy());
- W25_Write_Enable();
-
- W25_CS_ENABLE();
-
- W25_SPI_Write(0x02);
- W25_SPI_Write(address>>16);
- W25_SPI_Write(address>>8);
- W25_SPI_Write(address);
-
- for(i = 0;i < j;i++)
- {
- W25_SPI_Write(*(data+i));
- }
-
- W25_CS_DISABLE();
- }
- /*===============================================================
- *功能说明:W25 读数据
- *传入参数:地址、数据、个数
- *返回参数:无
- =================================================================*/
- void W25Q16_Read(ul address,uc *data,ui j)
- {
- ui i;
-
- while(W25_Read_Busy());
-
- W25_Write_Enable();
- W25_CS_ENABLE();
-
- W25_SPI_Write(0x03);
- W25_SPI_Write(address>>16);
- W25_SPI_Write(address>>8);
- W25_SPI_Write(address);
-
- for(i = 0;i < j;i++)
- {
- *(data+i) = W25_SPI_Read();
- }
-
- W25_CS_DISABLE();
- }
- void W25q16_Erasure(ul Dst_Addr)
- {
- Dst_Addr *= 4096;
-
- W25_Write_Enable();
-
- while(W25_Read_Busy());
-
- W25_CS_ENABLE();
-
- W25_SPI_Write(0x20);
-
- W25_SPI_Write((uc)((Dst_Addr)>>16));
- W25_SPI_Write((uc)((Dst_Addr)>>8));
- W25_SPI_Write((uc)Dst_Addr);
-
- W25_CS_DISABLE();
-
- while(W25_Read_Busy());
- }
- ui SPI_Flash_ReadID(void)
- {
- ui Temp = 0;
- W25_Write_Enable();
- W25_CS_ENABLE();
-
- W25_SPI_Write(0x90);//发送读取ID命令
-
- W25_SPI_Write(0x00);
- W25_SPI_Write(0x00);
- W25_SPI_Write(0x00);
-
- Temp |= W25_SPI_Read()<<8;
- Temp |= W25_SPI_Read();
-
- W25_CS_DISABLE();
-
- return Temp;
- }
复制代码
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