关于NAND FLASH读芯片ID 全是0XFFFFFFFF！！！

fdsf佛挡杀佛 · 发表于 2022-8-10 23:17:32

按照正点原子的例程修改引脚配置，如图是硬件连接原理图。与例程唯一不同的是NCE3引脚和NWAIT引脚，我将案例中这两个引脚（NCE3：PG9 NWAIT

D6）都改成实际使用中的引脚（NCE3：PC8 NWAIT

C6），代码下到板子上就识别不到芯片，读出的ID是NAND ID:0xffffffff。找了好久都没找到原因，大家帮忙看看，不胜感激！

配置的代码如下：
在nand.c中
//初始化NAND FLASH
u8 NAND_Init(void)
{
FMC_NAND_PCC_TimingTypeDef ComSpaceTiming,AttSpaceTiming;

NAND_MPU_Config();
NAND_Handler.Instance=FMC_Bank3;
NAND_Handler.Init.NandBank=FMC_NAND_BANK3;                         //NAND挂在BANK3上
NAND_Handler.Init.Waitfeature=FMC_NAND_PCC_WAIT_FEATURE_DISABLE; //关闭等待特性
NAND_Handler.Init.MemoryDataWidth=FMC_NAND_PCC_MEM_BUS_WIDTH_8;    //8位数据宽度
NAND_Handler.Init.EccComputation=FMC_NAND_ECC_DISABLE;             //禁止ECC
NAND_Handler.Init.ECCPageSize=FMC_NAND_ECC_PAGE_SIZE_512BYTE;    //ECC页大小为512字节
NAND_Handler.Init.TCLRSetupTime=10;                               //设置TCLR(tCLR=CLE到RE的延时)=(TCLR+TSET+2)*THCLK,THCLK=1/200M=5ns
NAND_Handler.Init.TARSetupTime=10;                               //设置TAR(tAR=ALE到RE的延时)=(TAR+TSET+1)*THCLK,THCLK=1/200M=5n。

ComSpaceTiming.SetupTime=10;       //建立时间
ComSpaceTiming.WaitSetupTime=10; //等待时间
ComSpaceTiming.HoldSetupTime=10; //保持时间
ComSpaceTiming.HiZSetupTime=10;    //高阻态时间

AttSpaceTiming.SetupTime=10;       //建立时间
AttSpaceTiming.WaitSetupTime=10; //等待时间
AttSpaceTiming.HoldSetupTime=10; //保持时间
AttSpaceTiming.HiZSetupTime=10;    //高阻态时间

HAL_NAND_Init(&NAND_Handler,&ComSpaceTiming,&AttSpaceTiming);
NAND_Reset();                      //复位NAND
delay_ms(100);
nand_dev.id=NAND_ReadID();          //读取ID
printf("NAND ID:%#x\r\n",nand_dev.id);
NAND_ModeSet(4);                   //设置为MODE4,高速模式
if(nand_dev.id==MT29F4G08ABADA)//NAND为MT29F4G08ABADA
{
      nand_dev.page_totalsize=2112;
      nand_dev.page_mainsize=2048;
      nand_dev.page_sparesize=64;
      nand_dev.block_pagenum=64;
      nand_dev.plane_blocknum=2048;
      nand_dev.block_totalnum=4096;
}else return 1; //错误，返回
return 0;
}

//NAND FALSH底层驱动,引脚配置，时钟使能
//此函数会被HAL_NAND_Init()调用
void HAL_NAND_MspInit(NAND_HandleTypeDef *hnand)
{
GPIO_InitTypeDef GPIO_Initure;

__HAL_RCC_FMC_CLK_ENABLE();          //使能FMC时钟
__HAL_RCC_GPIOC_CLK_ENABLE();          //使能GPIOG时钟
__HAL_RCC_GPIOD_CLK_ENABLE();          //使能GPIOD时钟
__HAL_RCC_GPIOE_CLK_ENABLE();          //使能GPIOE时钟

//初始化PC6 R/B引脚
  /* GPIO_InitStruct */
  GPIO_Initure.Pin = GPIO_PIN_6;
  GPIO_Initure.Mode = GPIO_MODE_INPUT;
  GPIO_Initure.Pull = GPIO_PULLUP;
  GPIO_Initure.Speed = GPIO_SPEED_FREQ_VERY_HIGH;

  HAL_GPIO_Init(GPIOC, &GPIO_Initure);

//初始化PC8 NCE3引脚
  GPIO_Initure.Pin = GPIO_PIN_8;
  GPIO_Initure.Mode = GPIO_MODE_AF_PP;
  GPIO_Initure.Pull = GPIO_NOPULL;
  GPIO_Initure.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_Initure.Alternate = GPIO_AF12_FMC;

  HAL_GPIO_Init(GPIOC, &GPIO_Initure);

  /* GPIO_InitStruct */
  GPIO_Initure.Pin = GPIO_PIN_11|GPIO_PIN_12;
  GPIO_Initure.Mode = GPIO_MODE_AF_PP;
  GPIO_Initure.Pull = GPIO_NOPULL;
  GPIO_Initure.Speed = GPIO_SPEED_FREQ_VERY_HIGH;

  HAL_GPIO_Init(GPIOD, &GPIO_Initure);

  /* GPIO_InitStruct */
  GPIO_Initure.Pin = GPIO_PIN_14|GPIO_PIN_15|GPIO_PIN_0|GPIO_PIN_1
                        |GPIO_PIN_4|GPIO_PIN_5;
  GPIO_Initure.Mode = GPIO_MODE_AF_PP;
  GPIO_Initure.Pull = GPIO_NOPULL;
  GPIO_Initure.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_Initure.Alternate = GPIO_AF12_FMC;

  HAL_GPIO_Init(GPIOD, &GPIO_Initure);

//初始化PE7,8,9,10
  GPIO_Initure.Pin = GPIO_PIN_7|GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10;
  GPIO_Initure.Mode = GPIO_MODE_AF_PP;
  GPIO_Initure.Pull = GPIO_NOPULL;
  GPIO_Initure.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_Initure.Alternate = GPIO_AF12_FMC;

  HAL_GPIO_Init(GPIOE, &GPIO_Initure);
}
在nand.h中也修改了#define NAND_RB                HAL_GPIO_ReadPin(GPIOC,GPIO_PIN_6)//NAND Flash的闲/忙引脚