stm32f103zet6读取nandflash有误

只看该作者 · 2014-10-21 14:58

本帖最后由小猫薄薄于 2014-10-21 14:58 编辑

nandflash的型号是 HY27UF081G2A, 128MB

命令参数如下图

这个芯片的页大小是2k的，修改了固件库中fsmc那部分的代码
写函数如下

uint32_t NAND_WriteBigPage(uint8_t *pBuffer,NAND_ADDRESS Address,uint32_t NumPageToWrite){
      uint32_t index = 0x00, numpagewritten = 0x00, addressstatus = NAND_VALID_ADDRESS;
      uint32_t  status = NAND_READY, size = 0x00;

      while((addressstatus == NAND_VALID_ADDRESS) && (status == NAND_READY) && (NumPageToWrite != 0)){
            *(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = NAND_CMD_WRITE0;

            *(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = 0x00;
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = 0X00;
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = ADDR_1st_CYCLE(ROW_ADDRESS);
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = ADDR_2nd_CYCLE(ROW_ADDRESS);

            size = NAND_PAGE_SIZE + (NAND_PAGE_SIZE * numpagewritten); /*Í³¼ÆÐ´ÈëµÄ¸öÊý*/

            for(;index < size;index++){
                     *(__IO uint8_t *)(Bank_NAND_ADDR | DATA_AREA) = pBuffer[index];
            }


            *(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = NAND_CMD_WRITE_TRUE1;
            status = NAND_GetStatus();//µÃµ½flashµÄµ±Ç°×´Ì¬

            if(status == NAND_READY){
                     numpagewritten++;
                     NumPageToWrite--;

                     addressstatus = NAND_AddressIncrement(&Address);
            }
      }
      return (status | addressstatus);
}

读flash的函数如下
uint32_t NAND_ReadBigPage(uint8_t *pBuffer,NAND_ADDRESS Address,uint32_t NumPageToWrite){
      uint32_t index = 0x00, numpagewritten = 0x00, addressstatus = NAND_VALID_ADDRESS;
      uint32_t  status = NAND_READY, size = 0x00;

      while((addressstatus == NAND_VALID_ADDRESS) && (NumPageToWrite != 0)){
            *(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = NAND_CMD_AREA_A;

            *(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = 0x00;
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = 0X00;
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = ADDR_1st_CYCLE(ROW_ADDRESS);
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = ADDR_2nd_CYCLE(ROW_ADDRESS);

            *(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = NAND_CMD_AREA_TRUE1;

            while(GPIO_ReadInputDataBit(GPIOG, GPIO_Pin_6) == 0 ){};
            size = NAND_PAGE_SIZE + (NAND_PAGE_SIZE * numpagewritten); /*Í³¼Æ¶Á³öµÄ¸öÊý*/

            for(;index < size;index++){
                     pBuffer[index] = *(__IO uint8_t *)(Bank_NAND_ADDR | DATA_AREA);
            }

                     numpagewritten++;
                     NumPageToWrite--;

                     addressstatus = NAND_AddressIncrement(&Address);
      }
      status = NAND_GetStatus();
      return (status | addressstatus);
}

主函数中将一组连续的数列101.102.103.104，........ 写入到第0页中，然后读出来校验，串口显示的结果却是一个固定值。结果如下图

单步调试的时候在单步到写的时候地址0x70000000中的内容如下图