我使用從官網(wǎng)下載的例程包中的\EXAM\SPI\SPI_FLASH文件夾內的程序來測試讀取w25Q32JVSIQ中的數(shù)據(jù)（已經(jīng)預先通過燒錄器燒寫進數(shù)據(jù)了）發(fā)現(xiàn)讀取到的數(shù)據(jù)與實際數(shù)據(jù)不符，但是讀取flash的ID又是正確的。

例如，我讀取地址0xDA0，得到的數(shù)據(jù)是：00 00 00 00 18 00 00 00 00 18 00 00 00 00 0C 00 但實際上0xDA0地址的數(shù)據(jù)如下圖。麻煩大家?guī)兔纯词鞘裁丛?

程序如下（刪掉了部分原代碼）：

?*@Note
?SPI接口操作FLASH外設例程：
?Master：SPI1_SCK(PA5)、SPI1_MISO(PA6)、SPI1_MOSI(PA7)。
?本例程演示?SPI?操作?Winbond?W25Qxx?SPIFLASH。
?注：
?pins:
????CS???——?PA2
????DO???——?PA6(SPI1_MISO)
????WP???——?3.3V
????DI???——?PA7(SPI1_MOSI)
????CLK??——?PA5(SPI1_SCK)
????HOLD?——?3.3V

*/

#include?"debug.h"
#include?"string.h"

/*?Winbond?SPIFalsh?ID?*/
#define?W25Q80???????????????????0XEF13
#define?W25Q16???????????????????0XEF14
#define?W25Q32???????????????????0XEF15
#define?W25Q64???????????????????0XEF16
#define?W25Q128??????????????????0XEF17

/*?Winbond?SPIFalsh?Instruction?List?*/
#define?W25X_WriteEnable?????????0x06???//Write?Enable
#define?W25X_WriteDisable????????0x04???//Write?Disable
#define?W25X_ReadStatusReg???????0x05???//Read?Status?Register-1
#define?W25X_WriteStatusReg??????0x01???//Write?Status?Register-1
#define?W25X_ReadData????????????0x03???//Read?Data
#define?W25X_FastReadData????????0x0B???//Fast?Read
#define?W25X_FastReadDual????????0x3B???//Fast?Read?Dual?Output
#define?W25X_PageProgram?????????0x02???//Page?Program
#define?W25X_BlockErase??????????0xD8???//Block?Erase?(64KB)
#define?W25X_SectorErase?????????0x20???//Sector?Erase?(4KB)
#define?W25X_ChipErase???????????0xC7???//Chip?Erase
#define?W25X_PowerDown???????????0xB9???//Power-down
#define?W25X_ReleasePowerDown????0xAB???//Release?Power-down?/?ID
#define?W25X_DeviceID????????????0xAB
#define?W25X_ManufactDeviceID????0x90???//Manufacturer/Device?ID
#define?W25X_JedecDeviceID???????0x9F???//JEDEC?ID

/*?Global?define?*/

/*?Global?Variable?*/
u8???????SPI_FLASH_BUF[4096];
const?u8?TEXT_Buf[]?=?{"CH32F103?SPI?FLASH?W25Qxx"};
#define?SIZE????sizeof(TEXT_Buf)

/*********************************************************************
?*?@fn??????SPI1_ReadWriteByte
?*
?*?@brief???SPI1?read?or?write?one?byte.
?*
?*?@param???TxData?-?write?one?byte?data.
?*
?*?@return??Read?one?byte?data.
?*/
u8?SPI1_ReadWriteByte(u8?TxData)
{
????u8?i?=?0;

????while(SPI_I2S_GetFlagStatus(SPI1,?SPI_I2S_FLAG_TXE)?==?RESET)//檢測TXE是否置位，是，則表示?DR為空，可以寫入數(shù)據(jù)
????{
????????i++;
????????if(i?>?200)
????????????return?0;
????}

????SPI_I2S_SendData(SPI1,?TxData);
????i?=?0;

????while(SPI_I2S_GetFlagStatus(SPI1,?SPI_I2S_FLAG_RXNE)?==?RESET)//檢測RXE是否置位，是，則表示?DR接收到數(shù)據(jù)，即發(fā)送完成
????{
????????i++;
????????if(i?>?200)
????????????return?0;
????}

????return?SPI_I2S_ReceiveData(SPI1);
}

/*********************************************************************
?*?@fn??????SPI_Flash_Init
?*
?*?@brief???Configuring?the?SPI?for?operation?flash.
?*
?*?@return??none
?*/
void?SPI_Flash_Init(void)
{
????GPIO_InitTypeDef?GPIO_InitStructure?=?{0};
????SPI_InitTypeDef??SPI_InitStructure?=?{0};

????RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA?|?RCC_APB2Periph_SPI1,?ENABLE);

????GPIO_InitStructure.GPIO_Pin?=?GPIO_Pin_2;
????GPIO_InitStructure.GPIO_Mode?=?GPIO_Mode_Out_PP;
????GPIO_InitStructure.GPIO_Speed?=?GPIO_Speed_50MHz;
????GPIO_Init(GPIOA,?&GPIO_InitStructure);
????GPIO_SetBits(GPIOA,?GPIO_Pin_2);

????GPIO_InitStructure.GPIO_Pin?=?GPIO_Pin_5;
????GPIO_InitStructure.GPIO_Mode?=?GPIO_Mode_AF_PP;
????GPIO_InitStructure.GPIO_Speed?=?GPIO_Speed_50MHz;
????GPIO_Init(GPIOA,?&GPIO_InitStructure);

????GPIO_InitStructure.GPIO_Pin?=?GPIO_Pin_6;
????GPIO_InitStructure.GPIO_Mode?=?GPIO_Mode_IN_FLOATING;
????GPIO_Init(GPIOA,?&GPIO_InitStructure);

????GPIO_InitStructure.GPIO_Pin?=?GPIO_Pin_7;
????GPIO_InitStructure.GPIO_Mode?=?GPIO_Mode_AF_PP;
????GPIO_InitStructure.GPIO_Speed?=?GPIO_Speed_50MHz;
????GPIO_Init(GPIOA,?&GPIO_InitStructure);

????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);

????SPI_Cmd(SPI1,?ENABLE);
}

/*********************************************************************
?*?@fn??????SPI_Flash_ReadSR
?*
?*?@brief???Read?W25Qxx?status?register.
?*????????——BIT7??6???5???4???3???2???1???0
?*????????——SPR???RV??TB??BP2?BP1?BP0?WEL?BUSY
?*
?*?@return??byte?-?status?register?value.
?*/
u8?SPI_Flash_ReadSR(void)
{
????u8?byte?=?0;

????GPIO_WriteBit(GPIOA,?GPIO_Pin_2,?0);
????SPI1_ReadWriteByte(W25X_ReadStatusReg);
????byte?=?SPI1_ReadWriteByte(0Xff);
????GPIO_WriteBit(GPIOA,?GPIO_Pin_2,?1);

????return?byte;
}


/*********************************************************************
?*?@fn??????SPI_Flash_ReadID
?*
?*?@brief???Read?flash?ID.
?*
?*?@return??Temp?-?FLASH?ID.
?*/
u16?SPI_Flash_ReadID(void)
{
????u16?Temp?=?0;

????GPIO_WriteBit(GPIOA,?GPIO_Pin_2,?0);//cs
????SPI1_ReadWriteByte(W25X_ManufactDeviceID);
????SPI1_ReadWriteByte(0x00);
????SPI1_ReadWriteByte(0x00);
????SPI1_ReadWriteByte(0x00);
????Temp?|=?SPI1_ReadWriteByte(0xFF)?<<?8;
????Temp?|=?SPI1_ReadWriteByte(0xFF);
????printf("IDtemp=%x\n\r",Temp);
????GPIO_WriteBit(GPIOA,?GPIO_Pin_2,?1);

????return?Temp;
}


/*********************************************************************
?*?@fn??????SPI_Flash_Read
?*
?*?@brief???Read?data?from?flash.
?*
?*?@param???pBuffer?-
?*??????????ReadAddr?-Initial?address(24bit).
?*??????????size?-?Data?length.
?*
?*?@return??none
?*/
void?SPI_Flash_Read(u8?*pBuffer,?u32?ReadAddr,?u16?size)
{
????u16?i;

????GPIO_WriteBit(GPIOA,?GPIO_Pin_2,?0);
????SPI1_ReadWriteByte(W25X_ReadData);
????SPI1_ReadWriteByte((u8)((ReadAddr)?>>?16));//發(fā)送24位地址
????SPI1_ReadWriteByte((u8)((ReadAddr)?>>?8));
????SPI1_ReadWriteByte((u8)ReadAddr);
????printf("read=>0x%.6X\n\r",ReadAddr);
????for(i?=?0;?i?<?size;?i++){
????????pBuffer[i]?=?SPI1_ReadWriteByte(0XFF);
???????//?printf("p-%.2x?",pBuffer[i]);
????}

????GPIO_WriteBit(GPIOA,?GPIO_Pin_2,?1);
}


int?main(void)
{
????//u8??datap[SIZE];
????u8??datap[16];
????u16?Flash_Model;
????u8?x;

????Delay_Init();
????USART_Printf_Init(115200);
????printf("SystemClk:%d\r\n",?SystemCoreClock);


????SPI_Flash_Init();

????Flash_Model?=?SPI_Flash_ReadID();
????printf("Flash_Model->\r\n",Flash_Model);


????SPI_Flash_Read(datap,?0xDA0,?16);//從地址0xDA0讀取16個字節(jié)

????for(x=0;?x<16;?x++)
????{
????????printf("%.2X?",datap[x]);
????}
????printf("\r\n");
????while(1);
}

我找到原因了，原來程序、接線、電壓都是沒問題的。因為我是用編程器讀取W25Q32里的數(shù)據(jù)時，直接插在了原來的板子上，所以造成編程器讀到的內容是錯的。把W25Q32從板子上取下來，重新讀取，內容就和程序里面讀取到的內容是一致的了。