STM32 SPI读写数据打印不出来
大神帮忙看看为啥只能读ID串口打印,其余擦除，在某个地址写数据，然后读数据都打印不出来。串口打印没问题！求帮忙指导！新手上路#include "stm32f10x.h"
#include "pbdata.h"
//要写入到W25Q16的字符串数组
const u8 TEXT_Buffer[]={"Explorer STM32F4 SPI TEST"};
#define SIZE sizeof(TEXT_Buffer)
int main(void)
{
u16 id=0;
u8 datatemp;
u32 FLASH_SIZE;
FLASH_SIZE=8*1024*1024; //FLASH 大小为8M字节
USART1_Configuration(9600);
NVIC_Configuration();
SPI_Configuration();
// id=SPI_Flash_ReadID();
// printf("%X \r\n",id);
SPI_Flash_Write_Page((u8*)TEXT_Buffer,FLASH_SIZE-100,SIZE);
delay_ms(100);
SPI_Flash_Read(datatemp,FLASH_SIZE-100,SIZE); //从倒数第100个地址处开始,读出SIZE个字节
printf("%s\r\n",datatemp);
while(1)
{
}
}
#include "pbdata.h"
u16 SPI_FLASH_TYPE=W25Q64;//默认就是25Q64
void SPI_Configuration(void)
{
SPI_InitTypeDefSPI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable SPI1 and GPIO clocks */
/*!< SPI_FLASH_SPI_CS_GPIO, SPI_FLASH_SPI_MOSI_GPIO,
SPI_FLASH_SPI_MISO_GPIO, SPI_FLASH_SPI_DETECT_GPIO
and SPI_FLASH_SPI_SCK_GPIO Periph clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOD, ENABLE);
/*!< SPI_FLASH_SPI Periph clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
/*!< Configure SPI_FLASH_SPI pins: SCK */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/*!< Configure SPI_FLASH_SPI pins: MISO */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/*!< Configure SPI_FLASH_SPI pins: MOSI */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/*!< Configure SPI_FLASH_SPI_CS_PIN pin: SPI_FLASH Card CS pin */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* SPI1 configuration */
// W25X16: data input on the DIO pin is sampled on the rising edge of the CLK.
// Data on the DO and DIO pins are clocked out on the falling edge of CLK.
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI1, &SPI_InitStructure);
/* Enable SPI1*/
SPI_FLASH_H;
SPI_Cmd(SPI1, ENABLE);
}
u8 SPI_SendByte(u8 byte)
{
while(SPI_I2S_GetFlagStatus(SPI1,SPI_I2S_FLAG_TXE)==RESET);
SPI_I2S_SendData(SPI1,byte);
while(SPI_I2S_GetFlagStatus(SPI1,SPI_I2S_FLAG_RXNE)==RESET);
return SPI_I2S_ReceiveData(SPI1);
}
//读取SPI_FLASH的状态寄存器
//BIT76 5 4 3 2 1 0
//SPR RVTB BP2 BP1 BP0 WEL BUSY
//SPR:默认0,状态寄存器保护位,配合WP使用
//TB,BP2,BP1,BP0:FLASH区域写保护设置
//WEL:写使能锁定
//BUSY:忙标记位(1,忙;0,空闲)
//默认:0x00
u8 SPI_Flash_ReadSR(void)
{
u8 byte=0;
SPI_FLASH_L; //使能器件
SPI_SendByte(W25X_ReadStatusReg); //发送读取状态寄存器命令
byte=SPI_SendByte(0Xff); //读取一个字节
SPI_FLASH_H; //取消片选
return byte;
}
//写SPI_FLASH状态寄存器
//只有SPR,TB,BP2,BP1,BP0(bit 7,5,4,3,2)可以写!!!
void SPI_FLASH_Write_SR(u8 sr)
{
SPI_FLASH_L; //使能器件
SPI_SendByte(W25X_WriteStatusReg); //发送写取状态寄存器命令
SPI_SendByte(sr); //写入一个字节
SPI_FLASH_H; //取消片选
}
//SPI_FLASH写使能
//将WEL置位
void SPI_FLASH_Write_Enable(void)
{
SPI_FLASH_L; //使能器件
SPI_SendByte(W25X_WriteEnable); //发送写使能
SPI_FLASH_H; //取消片选
}
//SPI_FLASH写禁止
//将WEL清零
void SPI_FLASH_Write_Disable(void)
{
SPI_FLASH_L; //使能器件
SPI_SendByte(W25X_WriteDisable); //发送写禁止指令
SPI_FLASH_H; //取消片选
}
//读取芯片ID W25X16的ID:0XEF14
u16 SPI_Flash_ReadID(void)
{
u16 Temp = 0;
SPI_FLASH_L;
SPI_SendByte(0x90);//发送读取ID命令
SPI_SendByte(0x00);
SPI_SendByte(0x00);
SPI_SendByte(0x00);
Temp|=SPI_SendByte(0xFF)<<8;
Temp|=SPI_SendByte(0xFF);
SPI_FLASH_H;
return Temp;
}
//读取SPI FLASH
//在指定地址开始读取指定长度的数据
//pBuffer:数据存储区
//ReadAddr:开始读取的地址(24bit)
//NumByteToRead:要读取的字节数(最大65535)
void SPI_Flash_Read(u8* pBuffer,u32 ReadAddr,u16 NumByteToRead)
{
u16 i;
SPI_FLASH_L; //使能器件
SPI_SendByte(W25X_ReadData); //发送读取命令
SPI_SendByte((u8)((ReadAddr)>>16));//发送24bit地址
SPI_SendByte((u8)((ReadAddr)>>8));
SPI_SendByte((u8)ReadAddr);
for(i=0;i<NumByteToRead;i++)
{
pBuffer=SPI_SendByte(0XFF); //循环读数
}
SPI_FLASH_H; //取消片选
}
//SPI在一页(0~65535)内写入少于256个字节的数据
//在指定地址开始写入最大256字节的数据
//pBuffer:数据存储区
//WriteAddr:开始写入的地址(24bit)
//NumByteToWrite:要写入的字节数(最大256),该数不应该超过该页的剩余字节数!!!
void SPI_Flash_Write_Page(u8* pBuffer,u32 WriteAddr,u16 NumByteToWrite)
{
u16 i;
SPI_FLASH_Write_Enable(); //SET WEL
SPI_FLASH_L; //使能器件
SPI_SendByte(W25X_PageProgram); //发送写页命令
SPI_SendByte((u8)((WriteAddr)>>16)); //发送24bit地址
SPI_SendByte((u8)((WriteAddr)>>8));
SPI_SendByte((u8)WriteAddr);
for(i=0;i<NumByteToWrite;i++)
SPI_SendByte(pBuffer);//循环写数
SPI_FLASH_H; //取消片选
SPI_Flash_Wait_Busy(); //等待写入结束
}
//无检验写SPI FLASH
//必须确保所写的地址范围内的数据全部为0XFF,否则在非0XFF处写入的数据将失败!
//具有自动换页功能
//在指定地址开始写入指定长度的数据,但是要确保地址不越界!
//pBuffer:数据存储区
//WriteAddr:开始写入的地址(24bit)
//NumByteToWrite:要写入的字节数(最大65535)
//CHECK OK
void SPI_Flash_Write_NoCheck(u8* pBuffer,u32 WriteAddr,u16 NumByteToWrite)
{
u16 pageremain;
pageremain=256-WriteAddr%256; //单页剩余的字节数
if(NumByteToWrite<=pageremain)pageremain=NumByteToWrite;//不大于256个字节
while(1)
{
SPI_Flash_Write_Page(pBuffer,WriteAddr,pageremain);
if(NumByteToWrite==pageremain)break;//写入结束了
else //NumByteToWrite>pageremain
{
pBuffer+=pageremain;
WriteAddr+=pageremain;
NumByteToWrite-=pageremain; //减去已经写入了的字节数
if(NumByteToWrite>256)pageremain=256; //一次可以写入256个字节
else pageremain=NumByteToWrite; //不够256个字节了
}
}
;
}
//写SPI FLASH
//在指定地址开始写入指定长度的数据
//该函数带擦除操作!
//pBuffer:数据存储区
//WriteAddr:开始写入的地址(24bit)
//NumByteToWrite:要写入的字节数(最大65535)
u8 SPI_FLASH_BUF;
void SPI_Flash_Write(u8* pBuffer,u32 WriteAddr,u16 NumByteToWrite)
{
u32 secpos;
u16 secoff;
u16 secremain;
u16 i;
secpos=WriteAddr/4096;//扇区地址 0~511 for w25x16
secoff=WriteAddr%4096;//在扇区内的偏移
secremain=4096-secoff;//扇区剩余空间大小
if(NumByteToWrite<=secremain)secremain=NumByteToWrite;//不大于4096个字节
while(1)
{
SPI_Flash_Read(SPI_FLASH_BUF,secpos*4096,4096);//读出整个扇区的内容
for(i=0;i<secremain;i++)//校验数据
{
if(SPI_FLASH_BUF!=0XFF)break;//需要擦除
}
if(i<secremain)//需要擦除
{
SPI_Flash_Erase_Sector(secpos);//擦除这个扇区
for(i=0;i<secremain;i++) //复制
{
SPI_FLASH_BUF=pBuffer;
}
SPI_Flash_Write_NoCheck(SPI_FLASH_BUF,secpos*4096,4096);//写入整个扇区
}else SPI_Flash_Write_NoCheck(pBuffer,WriteAddr,secremain);//写已经擦除了的,直接写入扇区剩余区间.
if(NumByteToWrite==secremain)break;//写入结束了
else//写入未结束
{
secpos++;//扇区地址增1
secoff=0;//偏移位置为0
pBuffer+=secremain;//指针偏移
WriteAddr+=secremain;//写地址偏移
NumByteToWrite-=secremain; //字节数递减
if(NumByteToWrite>4096)secremain=4096; //下一个扇区还是写不完
else secremain=NumByteToWrite; //下一个扇区可以写完了
}
};
}
//擦除整个芯片
//整片擦除时间:
//W25X16:25s
//W25X32:40s
//W25X64:40s
//等待时间超长...
void SPI_Flash_Erase_Chip(void)
{
SPI_FLASH_Write_Enable(); //SET WEL
SPI_Flash_Wait_Busy();
SPI_FLASH_L; //使能器件
SPI_SendByte(W25X_ChipErase); //发送片擦除命令
SPI_FLASH_H; //取消片选
SPI_Flash_Wait_Busy(); //等待芯片擦除结束
}
//擦除一个扇区
//Dst_Addr:扇区地址 0~511 for w25x16
//擦除一个山区的最少时间:150ms
void SPI_Flash_Erase_Sector(u32 Dst_Addr)
{
Dst_Addr*=4096;
SPI_FLASH_Write_Enable(); //SET WEL
SPI_Flash_Wait_Busy();
SPI_FLASH_L; //使能器件
SPI_SendByte(W25X_SectorErase); //发送扇区擦除指令
SPI_SendByte((u8)((Dst_Addr)>>16));//发送24bit地址
SPI_SendByte((u8)((Dst_Addr)>>8));
SPI_SendByte((u8)Dst_Addr);
SPI_FLASH_H; //取消片选
SPI_Flash_Wait_Busy(); //等待擦除完成
}
//等待空闲
void SPI_Flash_Wait_Busy(void)
{
while ((SPI_Flash_ReadSR()&0x01)==0x01); // 等待BUSY位清空
}
//进入掉电模式
void SPI_Flash_PowerDown(void)
{
SPI_FLASH_L; //使能器件
SPI_SendByte(W25X_PowerDown); //发送掉电命令
SPI_FLASH_H; //取消片选
delay_us(3); //等待TPD
}
//唤醒
void SPI_Flash_WAKEUP(void)
{
SPI_FLASH_L; //使能器件
SPI_SendByte(W25X_ReleasePowerDown); //send W25X_PowerDown command 0xAB
SPI_FLASH_H; //取消片选
delay_us(3); //等待TRES1
}
#ifndef _W25Q64BV_H
#define _W25Q64BV_H
#include "pbdata.h"
//W25X系列/Q系列芯片列表
//W25Q80 ID0XEF13
//W25Q16 ID0XEF14
//W25Q32 ID0XEF15
//W25Q32 ID0XEF16
#define W25Q800XEF13
#define W25Q160XEF14
#define W25Q320XEF15
#define W25Q640XEF16
extern u16 SPI_FLASH_TYPE;//定义我们使用的flash芯片型号
#define SPI_FLASH_L GPIO_ResetBits(GPIOE,GPIO_Pin_6);
#define SPI_FLASH_H GPIO_SetBits(GPIOE,GPIO_Pin_6);
////////////////////////////////////////////////////////////////////////////
//指令表
#define W25X_WriteEnable 0x06
#define W25X_WriteDisable 0x04
#define W25X_ReadStatusReg0x05
#define W25X_WriteStatusReg0x01
#define W25X_ReadData 0x03
#define W25X_FastReadData 0x0B
#define W25X_FastReadDual 0x3B
#define W25X_PageProgram 0x02
#define W25X_BlockErase 0xD8
#define W25X_SectorErase 0x20
#define W25X_ChipErase 0xC7
#define W25X_PowerDown 0xB9
#define W25X_ReleasePowerDown 0xAB
#define W25X_DeviceID 0xAB
#define W25X_ManufactDeviceID 0x90
#define W25X_JedecDeviceID0x9F
void SPI_Configuration(void);
u8 SPI_SendByte(u8 byte);
u16SPI_Flash_ReadID(void); //读取FLASH ID
u8SPI_Flash_ReadSR(void); //读取状态寄存器
void SPI_FLASH_Write_SR(u8 sr); //写状态寄存器
void SPI_FLASH_Write_Enable(void);//写使能
void SPI_FLASH_Write_Disable(void); //写保护
void SPI_Flash_Write_NoCheck(u8* pBuffer,u32 WriteAddr,u16 NumByteToWrite);
void SPI_Flash_Write_Page(u8* pBuffer,u32 WriteAddr,u16 NumByteToWrite);//写入flash页
void SPI_Flash_Read(u8* pBuffer,u32 ReadAddr,u16 NumByteToRead); //读取flash
void SPI_Flash_Write(u8* pBuffer,u32 WriteAddr,u16 NumByteToWrite);//写入flash
void SPI_Flash_Erase_Chip(void); //整片擦除
void SPI_Flash_Erase_Sector(u32 Dst_Addr);//扇区擦除
void SPI_Flash_Wait_Busy(void); //等待空闲
void SPI_Flash_PowerDown(void); //进入掉电模式
void SPI_Flash_WAKEUP(void); //唤醒
#endif
你确定你读出来的数据就是你写进去的数据？用仿真器跟踪一下看看你读出来的数据有没有问题！！！
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