参考了不少前辈的例程,实践了一下。
测试效果如图所示:
主要更改3个源码文件,2个SPI Flash访问驱动,1个main函数,全部列在此处。
Hardware/spiflash.c
/*****************************************
*@Note
Winbond W25Qxx SPIFLASH
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"
#include "spiflash.h"
/* Global define */
/* Global Variable */
u8 SPI_FLASH_BUF[4096];
/*******************************************************************************
* Function Name : SPI1_ReadWriteByte
* Description : SPI1 read or write one byte.
* Input : 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)
{
i++;
if (i > 200)
return 0;
}
SPI_I2S_SendData(SPI1, TxData);
i = 0;
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET)
{
i++;
if (i > 200)
return 0;
}
return SPI_I2S_ReceiveData(SPI1);
}
/*******************************************************************************
* Function Name : SPI_Flash_Init
* Description : Configuring the SPI for operation flash.
* Input : None
* Return : None
*******************************************************************************/
void SPI_Flash_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
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);
}
/*******************************************************************************
* Function Name : SPI_Flash_ReadSR
* Description : Read W25Qxx status register.
* ——BIT7 6 5 4 3 2 1 0
* ——SPR RV TB BP2 BP1 BP0 WEL BUSY
* Input : None
* 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;
}
/*******************************************************************************
* Function Name : SPI_FLASH_Write_SR
* Description : Write W25Qxx status register.
* Input : sr:status register value.
* Return : None
*******************************************************************************/
void SPI_FLASH_Write_SR(u8 sr)
{
GPIO_WriteBit(GPIOA, GPIO_Pin_2, 0);
SPI1_ReadWriteByte(W25X_WriteStatusReg);
SPI1_ReadWriteByte(sr);
GPIO_WriteBit(GPIOA, GPIO_Pin_2, 1);
}
/*******************************************************************************
* Function Name : SPI_Flash_Wait_Busy
* Description : Wait flash free.
* Input : None
* Return : None
*******************************************************************************/
void SPI_Flash_Wait_Busy(void)
{
while ((SPI_Flash_ReadSR() & 0x01) == 0x01)
;
}
/*******************************************************************************
* Function Name : SPI_FLASH_Write_Enable
* Description : Enable flash write.
* Input : None
* Return : None
*******************************************************************************/
void SPI_FLASH_Write_Enable(void)
{
GPIO_WriteBit(GPIOA, GPIO_Pin_2, 0);
SPI1_ReadWriteByte(W25X_WriteEnable);
GPIO_WriteBit(GPIOA, GPIO_Pin_2, 1);
}
/*******************************************************************************
* Function Name : SPI_FLASH_Write_Disable
* Description : Disable flash write.
* Input : None
* Return : None
*******************************************************************************/
void SPI_FLASH_Write_Disable(void)
{
GPIO_WriteBit(GPIOA, GPIO_Pin_2, 0);
SPI1_ReadWriteByte(W25X_WriteDisable);
GPIO_WriteBit(GPIOA, GPIO_Pin_2, 1);
}
/*******************************************************************************
* Function Name : SPI_Flash_ReadID
* Description : Read flash ID.
* Input : None
* Return : Temp: FLASH ID.
*******************************************************************************/
u16 SPI_Flash_ReadID(void)
{
u16 Temp = 0;
GPIO_WriteBit(GPIOA, GPIO_Pin_2, 0);
SPI1_ReadWriteByte(W25X_ManufactDeviceID);
SPI1_ReadWriteByte(0x00);
SPI1_ReadWriteByte(0x00);
SPI1_ReadWriteByte(0x00);
Temp |= SPI1_ReadWriteByte(0xFF) << 8;
Temp |= SPI1_ReadWriteByte(0xFF);
GPIO_WriteBit(GPIOA, GPIO_Pin_2, 1);
return Temp;
}
/*******************************************************************************
* Function Name : SPI_Flash_Erase_Sector
* Description : Erase one sector(4Kbyte).
* Input : Dst_Addr: 0 —— 2047
* Return : None
*******************************************************************************/
void SPI_Flash_Erase_Sector(u32 Dst_Addr)
{
Dst_Addr *= 4096;
SPI_FLASH_Write_Enable();
SPI_Flash_Wait_Busy();
GPIO_WriteBit(GPIOA, GPIO_Pin_2, 0);
SPI1_ReadWriteByte(W25X_SectorErase);
SPI1_ReadWriteByte((u8) ((Dst_Addr) >> 16));
SPI1_ReadWriteByte((u8) ((Dst_Addr) >> 8));
SPI1_ReadWriteByte((u8) Dst_Addr);
GPIO_WriteBit(GPIOA, GPIO_Pin_2, 1);
SPI_Flash_Wait_Busy();
}
/*******************************************************************************
* Function Name : SPI_Flash_Read
* Description : Read data from flash.
* Input : 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));
SPI1_ReadWriteByte((u8) ((ReadAddr) >> 8));
SPI1_ReadWriteByte((u8) ReadAddr);
for (i = 0; i < size; i++)
{
pBuffer[i] = SPI1_ReadWriteByte(0XFF);
}
GPIO_WriteBit(GPIOA, GPIO_Pin_2, 1);
}
/*******************************************************************************
* Function Name : SPI_Flash_Write_Page
* Description : Write data by one page.
* Input : pBuffer:
* WriteAddr:Initial address(24bit).
* size:Data length.
* Return : None
*******************************************************************************/
void SPI_Flash_Write_Page(u8* pBuffer, u32 WriteAddr, u16 size)
{
u16 i;
SPI_FLASH_Write_Enable();
GPIO_WriteBit(GPIOA, GPIO_Pin_2, 0);
SPI1_ReadWriteByte(W25X_PageProgram);
SPI1_ReadWriteByte((u8) ((WriteAddr) >> 16));
SPI1_ReadWriteByte((u8) ((WriteAddr) >> 8));
SPI1_ReadWriteByte((u8) WriteAddr);
for (i = 0; i < size; i++)
{
SPI1_ReadWriteByte(pBuffer[i]);
}
GPIO_WriteBit(GPIOA, GPIO_Pin_2, 1);
SPI_Flash_Wait_Busy();
}
/*******************************************************************************
* Function Name : SPI_Flash_Write_NoCheck
* Description : Write data to flash.(need Erase)
* All data in address rang is 0xFF.
* Input : pBuffer:
* WriteAddr: Initial address(24bit).
* size: Data length.
* Return : None
*******************************************************************************/
void SPI_Flash_Write_NoCheck(u8* pBuffer, u32 WriteAddr, u16 size)
{
u16 pageremain;
pageremain = 256 - WriteAddr % 256;
if (size <= pageremain)
pageremain = size;
while (1)
{
SPI_Flash_Write_Page(pBuffer, WriteAddr, pageremain);
if (size == pageremain)
{
break;
}
else
{
pBuffer += pageremain;
WriteAddr += pageremain;
size -= pageremain;
if (size > 256)
pageremain = 256;
else
pageremain = size;
}
}
}
/*******************************************************************************
* Function Name : SPI_Flash_Write
* Description : Write data to flash.(no need Erase)
* Input : pBuffer:
* WriteAddr: Initial address(24bit).
* size: Data length.
* Return : None
*******************************************************************************/
void SPI_Flash_Write(u8* pBuffer, u32 WriteAddr, u16 size)
{
u32 secpos;
u16 secoff;
u16 secremain;
u16 i;
secpos = WriteAddr / 4096;
secoff = WriteAddr % 4096;
secremain = 4096 - secoff;
if (size <= secremain)
secremain = size;
while (1)
{
SPI_Flash_Read(SPI_FLASH_BUF, secpos * 4096, 4096);
for (i = 0; i < secremain; i++)
{
if (SPI_FLASH_BUF[secoff + i] != 0XFF)
break;
}
if (i < secremain)
{
SPI_Flash_Erase_Sector(secpos);
for (i = 0; i < secremain; i++)
{
SPI_FLASH_BUF[i + secoff] = pBuffer[i];
}
SPI_Flash_Write_NoCheck(SPI_FLASH_BUF, secpos * 4096, 4096);
}
else
{
SPI_Flash_Write_NoCheck(pBuffer, WriteAddr, secremain);
}
if (size == secremain)
{
break;
}
else
{
secpos++;
secoff = 0;
pBuffer += secremain;
WriteAddr += secremain;
size -= secremain;
if (size > 4096)
{
secremain = 4096;
}
else
{
secremain = size;
}
}
}
}
/*******************************************************************************
* Function Name : SPI_Flash_Erase_Chip
* Description : Erase all FLASH pages.
* Input : None
* Return : None
*******************************************************************************/
void SPI_Flash_Erase_Chip(void)
{
SPI_FLASH_Write_Enable();
SPI_Flash_Wait_Busy();
GPIO_WriteBit(GPIOA, GPIO_Pin_2, 0);
SPI1_ReadWriteByte(W25X_ChipErase);
GPIO_WriteBit(GPIOA, GPIO_Pin_2, 1);
SPI_Flash_Wait_Busy();
}
/*******************************************************************************
* Function Name : SPI_Flash_PowerDown
* Description : Enter power down mode.
* Input : None
* Return : None
*******************************************************************************/
void SPI_Flash_PowerDown(void)
{
GPIO_WriteBit(GPIOA, GPIO_Pin_2, 0);
SPI1_ReadWriteByte(W25X_PowerDown);
GPIO_WriteBit(GPIOA, GPIO_Pin_2, 1);
Delay_Us(3);
}
/*******************************************************************************
* Function Name : SPI_Flash_WAKEUP
* Description : Power down wake up.
* Input : None
* Return : None
*******************************************************************************/
void SPI_Flash_WAKEUP(void)
{
GPIO_WriteBit(GPIOA, GPIO_Pin_2, 0);
SPI1_ReadWriteByte(W25X_ReleasePowerDown);
GPIO_WriteBit(GPIOA, GPIO_Pin_2, 1);
Delay_Us(3);
}
Hardware/spiflash.h
#ifndef __SPIFLASH_H
#define __SPIFLASH_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
#define W25X_WriteDisable 0x04
#define W25X_ReadStatusReg 0x05
#define W25X_WriteStatusReg 0x01
#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_JedecDeviceID 0x9F
u8 SPI1_ReadWriteByte(u8 TxData);
void SPI_Flash_Init(void);
u8 SPI_Flash_ReadSR(void);
void SPI_FLASH_Write_SR(u8 sr);
void SPI_Flash_Wait_Busy(void);
void SPI_FLASH_Write_Enable(void);
void SPI_FLASH_Write_Disable(void);
u16 SPI_Flash_ReadID(void);
void SPI_Flash_Erase_Sector(u32 Dst_Addr);
void SPI_Flash_Read(u8* pBuffer,u32 ReadAddr,u16 size);
void SPI_Flash_Write_Page(u8* pBuffer,u32 WriteAddr,u16 size);
void SPI_Flash_Write_NoCheck(u8* pBuffer,u32 WriteAddr,u16 size);
void SPI_Flash_Write(u8* pBuffer,u32 WriteAddr,u16 size);
void SPI_Flash_Erase_Chip(void);
void SPI_Flash_PowerDown(void);
void SPI_Flash_WAKEUP(void);
#endif
main.c/********************************** (C) COPYRIGHT *******************************
* File Name : main.c
* Author : WCH
* Version : V1.0.0
* Date : 2020/04/30
* Description : Main program body.
*******************************************************************************/
/*
*@Note
W25Q16串行 Flash存储器 Raw数据读写测试例程。
*/
#pragma message("short-cut R11 before programming")
#include <string.h>
#include "debug.h"
#include "../Hardware/spiflash.h"
/* Global typedef */
/* Global define */
/* Global Variable */
const u8 TEXT_Buf[] =
{ "CH32F103C8T6 SPI FLASH W25Qxx Read/Write raw data buffer content" };
#define SIZE sizeof(TEXT_Buf)
/*******************************************************************************
* Function Name : main
* Description : Main program.
* Input : None
* Return : None
*******************************************************************************/
int main(void)
{
u8 datap[SIZE] =
{ };
u16 Flash_Model = 0;
Delay_Init();
USART_Printf_Init(115200);
printf("SystemClk: %d\r\n", SystemCoreClock);
SPI_Flash_Init();
Flash_Model = SPI_Flash_ReadID();
printf("Flash_Model:%x\r\n", Flash_Model);
switch (Flash_Model)
{
case W25Q80:
printf("W25Q80 OK!\r\n");
break;
case W25Q16:
printf("W25Q16 OK!\r\n");
break;
case W25Q32:
printf("W25Q32 OK!\r\n");
break;
case W25Q64:
printf("W25Q64 OK!\r\n");
break;
case W25Q128:
printf("W25Q128 OK!\r\n");
break;
default:
printf("Failed!\r\n");
break;
}
printf("Start Erase W25Qxx ...\r\n");
SPI_Flash_Erase_Sector(0);
printf("W25Qxx Erase Finished!\r\n");
Delay_Ms(500);
printf("Start Read W25Qxx ...\r\n");
SPI_Flash_Read(datap, 0x0, SIZE);
printf("%s\r\n", datap);
Delay_Ms(500);
printf("Start Write W25Qxx ...\r\n");
SPI_Flash_Write((u8*) TEXT_Buf, 0, SIZE);
printf("W25Qxx Write Finished!\r\n");
Delay_Ms(500);
printf("Start Read W25Qxx ...\r\n");
SPI_Flash_Read(datap, 0x0, SIZE);
printf("%s\r\n", datap);
while (1)
{
Delay_Ms(1000);
printf("Start Read W25Qxx ...\r\n");
SPI_Flash_Read(datap, 0x0, SIZE);
printf("%s\r\n", datap);
}
return 0;
}
完整代码打包在此:
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