nandflash调试出错，到底是硬件问题还是软件问题？

hufans · 发表于 2018-1-29 14:27:15

器件型号：k9f1208 64M x 8 Bit NAND Flash
初始化代码：

初始化完毕后，

不论是读ID：
  /* Send Command to the command area */
  *(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = 0x90;
  *(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = 0x00;

/*!< Sequence to read ID from NAND flash */
data = *(__IO uint32_t *)(Bank_NAND_ADDR | DATA_AREA);

还是读状态：
/* Step 1: Write the 0x70h command */
*(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = NAND_CMD_STATUS;
/* Step 2: get out the data in the bus-line and then check the status */
data = *(__IO uint8_t *)(Bank_NAND_ADDR);

返回的值都是FF，谁能帮忙解决一下，困扰了好几天了。