stm32GPIO模拟时序读写nandflash(K9F1G08U0B)问题

axlinux · 发表于 2014-2-14 13:08:02

我使用的STM32F103VBT6这款芯片,K9F1G08U0B和 STM32F103VBT6连接接口有如下对应关系:

ALE——PA1

WE——PA2

WP——PA3

R\B——PC0

RE——PC1

CE——PC2

CLE——PC3

8位IO口对应PE0——PE7

下面4个函数，对应的是读取设备的ID，我在main函数里调用函数Nand_Flash_ReadDeviceID();

则会从串口打印出DeviceID = ec f1 0 95 40，这个设备ID号是正确的。问题在下面。

/***************************

写指令函数

***************************/

void Nand_FlashCommandLatch(uint8_t CommandTypes)

{

Data_PortOutputMode();

Flash_CE_Low;

Flash_CLE_Low;

Flash_ALE_Low;

Flash_WE_High;

Flash_CLE_High;

Flash_WE_Low;

Data_Output(CommandTypes);

Flash_WE_High;

Flash_CLE_Low;

Flash_ALE_High;

Flash_CE_High;

}

/****************************

设置地址函数

****************************/

void Nand_Flash_Write_Address(uint32_t Address)

{

Data_PortOutputMode();

Flash_CE_Low;

Flash_CLE_Low;

Flash_WE_High;

Flash_ALE_Low;

Flash_ALE_High;

Flash_WE_Low;

Data_Output((Address));

Flash_WE_High;

Flash_ALE_Low;

Flash_ALE_High;

Flash_WE_Low;

Data_Output((Address >> 8) & 0x0f);

Flash_WE_High;

Flash_ALE_Low;

Flash_ALE_High;

Flash_WE_Low;

Data_Output((Address >> 12) & 0xFF);

Flash_WE_High;

Flash_ALE_Low;

Flash_ALE_High;

Flash_WE_Low;

Data_Output((Address >> 20) & 0xFF);

Flash_WE_High;

Flash_ALE_Low;

Flash_CE_High;

}

/*******************************

用来读设备的ID

*******************************/

void Nand_FlashReadData(uint8_t *pBuffer,uint32_t rd_Length)

{

uint32_t i = 0;

Data_PortInputMode();

Flash_CE_Low;

while(rd_Length--)

{

Flash_RE_Low;

*(pBuffer + i) = Data_Input;

Flash_RE_High;

i++;

}

Flash_RE_High;

Flash_CE_High;

}

/*读设备ID函数*/

void Nand_Flash_ReadDeviceID(void)

{

uint8_t array[5];

Nand_FlashCommandLatch(0x90);

Nand_Flash_Write_Address(0x00);

Nand_FlashReadData(array,5);

printf("DeviceID = %x %x %x %x %x\r\n",array[0],array[1],array[2],array[3],array[4]);

}

下面的两个函数分别是向一页中写数据的函数和从一页中读出数据，我是对照K9F1G08U0D数据手册中Page Program Operation的时序和Read Operation的时序写的，虽然我用的是K9F1G08U0B，但我觉得这两个应该时序上差别，我在main函数里面执行红色标记的代码，从串口打印出的数据如下：

Nand_FlashPage_Program is Error

Page 0 data:0xff 0x1e 0xf0 0x0 0x7 0x0 0xe0 0x0 0x7 0x18

而我写入的数据为 uint8_t arr[]="0123456789";

哪位大侠遇到过这样的问题，帮小弟解决一下，到底我的写错在哪里还是我的操作顺序有问题呢？

/****************************

向某一页中写数据

****************************/

bool Nand_FlashPage_Program(uint32_t PageNumber,uint8_t *string)

{

uint8_t regvalue = 0;

uint32_t i=2048,j=0;

uint32_t Address = PageNumber*2048;

uint8_t *pBuffer=string;

Data_PortOutputMode();

Flash_CE_Low;

Flash_ALE_Low;

Flash_RE_High;

Flash_CLE_High;

Flash_WE_Low;

Data_Output(0x80);

Flash_WE_High;

Flash_CLE_Low;

Flash_ALE_High;

Flash_WE_Low;

Data_Output((Address));

Flash_WE_High;

Flash_WE_Low;

Data_Output((Address >> 8) & 0x0F);

Flash_WE_High;

Flash_WE_Low;

Data_Output((Address >> 12) & 0xFF);

Flash_WE_High;

Flash_WE_Low;

Data_Output((Address >> 20) & 0xFF);

Flash_WE_High;

Flash_ALE_Low;

while(i--)

{

Flash_WE_Low;

Data_Output(*(pBuffer + j));

Flash_WE_High;

j++;

}

Flash_WE_Low;

Flash_CLE_High;

Data_Output(0x10);

Flash_WE_High;

Flash_Wait();

Flash_WE_Low;

Data_Output(0x70);

Flash_WE_High;

Flash_CLE_Low;

Data_PortInputMode();

Flash_RE_Low;

regvalue = Data_Input;

Flash_RE_High;

if(!( (1 << 0) & regvalue))

{

return TRUE;

}

else

{

return FALSE;

}

/*********************

从一页中读出数据

*********************/

void Nand_Flash_ReadOnePage(uint32_t sc_address,uint8_t *string)

{

uint32_t Address = 2048*sc_address;

uint32_t i=2048,j=0;

uint8_t dat;

Data_PortOutputMode();

//Flash_CLE_Low;

//Flash_CE_High;

//Flash_WE_High;

Flash_CE_Low;

Flash_ALE_Low;

Flash_RE_High;

Flash_CLE_High;

Flash_WE_Low;

Data_Output(0x00);

Flash_WE_Low;

Flash_WE_High;

Flash_CLE_Low;

Flash_ALE_High;

Flash_WE_Low;

Data_Output(Address);

Flash_WE_High;

Flash_WE_Low;

Data_Output((Address >> 8) & 0x0F);

Flash_WE_High;

Flash_WE_Low;

Data_Output((Address >> 12) & 0xFF);

Flash_WE_High;

Flash_WE_Low;

Data_Output((Address >> 20) & 0xFF);

Flash_WE_High;

Flash_ALE_Low;

Flash_CLE_High;

Flash_WE_Low;

Data_Output(0x30);

Flash_WE_High;

Flash_CLE_Low;

Flash_Wait();

Data_PortInputMode();

while(i--)

{

Flash_RE_Low;

*(string+j) = Data_Input;

Flash_Delay(c_FlashDelayCnt);

Flash_RE_High;

Flash_Delay(c_FlashDelayCnt);

}

int main(void)

{

uint8_t array[2112],i;

bool Is_ok;

Init_RCC();

delay_init(64); //延时函数初始化

NVIC_Configuration(); //设置NVIC中断分组2:2位抢占优先级，2位响应优先级

uart_init(115200);

Nandflash_Init();

Is_ok = Nand_FlashPage_Program(0x00,arr);

if(Is_ok==TRUE)

printf("Nand_FlashPage_Program is Successful\r\n");

else

printf("Nand_FlashPage_Program is Error\r\n");

while(1)

{

Nand_Flash_ReadOnePage(0x00,array);

printf("Page 0 data:");

for(i=0;i<10;i++)

{

printf("0x%x ",array);

}

printf("\r\n");

delay_ms(1000);

}

}

这是我的nandflash初始化函数

void Nandflash_Init()

{

GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOE, ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;

GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_SetBits(GPIOA,GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;

GPIO_Init(GPIOC, &GPIO_InitStructure);

GPIO_SetBits(GPIOC,GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;

GPIO_Init(GPIOC, &GPIO_InitStructure);

GPIOE->CRL = 0x33333333;

Flash_WP_High;

}