使用SPI3读写FM25CL64G出现错误

追梦少年hong · 发表于 2021-4-19 14:49:59

//在主函数中，读取数据一直为0，不知道问题出现在哪，没有头绪
//希望大佬能给点建议，帮忙找找错误，不胜感激
#include"eeprom.h"

void EEPROM_Init_Config(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  SPI_InitTypeDef SPI3_Init;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOG,ENABLE);
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3,ENABLE);

  //配置SPI口
/*Configure SPI3--SCK,MOSI*/
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_5;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOB,&GPIO_InitStructure);
  /*Configure SPI3--MISO*/
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
  GPIO_Init(GPIOB,&GPIO_InitStructure);
  /*Configure NSS of SPI3*/
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
  /*configure EEPROM-CS*/
  GPIO_InitStructure.GPIO_Pin = IO_EEPROM_CS;          //芯片片选管脚
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(PORT_EEPROM_CS, &GPIO_InitStructure);
  /*Configure EEPROM-WP*/
GPIO_InitStructure.GPIO_Pin = IO_EEPROM_WP;       //芯片保护管脚
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(PORT_EEPROM_WP, &GPIO_InitStructure);

  //配置SPI3
  SPI3_Init.SPI_Direction = SPI_Direction_2Lines_FullDuplex;//双向全双工
  SPI3_Init.SPI_Mode = SPI_Mode_Master;
  SPI3_Init.SPI_DataSize = SPI_DataSize_8b;
  SPI3_Init.SPI_CPOL = SPI_CPOL_Low;
  SPI3_Init.SPI_CPHA = SPI_CPHA_1Edge;
  SPI3_Init.SPI_NSS = SPI_NSS_Soft;
  SPI3_Init.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_16;
  SPI3_Init.SPI_CRCPolynomial = 7;
  SPI3_Init.SPI_FirstBit = SPI_FirstBit_MSB;//MSB开始传输
  SPI_Init(SPI3, &SPI3_Init);
  SPI_Cmd(SPI3, ENABLE);//使能SPI3

  EEPROM_CS_H;                                                 //拉高片选
  EEPROM_WP_CLOSE;                                           //拉高保护管脚，关闭写保护
}

void EEPROM_Read(u16 romAddress,u8* ramAddress,u32 dataLength)
{
  u32 i=0;
  SPI_I2S_ClearFlag(SPI3, SPI_I2S_FLAG_TXE);
  SPI_I2S_ClearFlag(SPI3, SPI_I2S_FLAG_RXNE);
  EEPROM_CS_L;                                                 //拉低片选管脚
  SPI_I2S_SendData(SPI3,(u16)EEPROM_COMMAND_READ);             //EEPROM_COMMAND_READ=3
  while(!SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_TXE));

  SPI_I2S_ClearFlag(SPI3, SPI_I2S_FLAG_TXE);
  SPI_I2S_ClearFlag(SPI3, SPI_I2S_FLAG_RXNE);
  SPI_I2S_SendData(SPI3,(0xFF & (romAddress>>8)));
  while(!SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_TXE) || !SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_RXNE));

  SPI_I2S_ClearFlag(SPI3, SPI_I2S_FLAG_TXE);
  SPI_I2S_ClearFlag(SPI3, SPI_I2S_FLAG_RXNE);
  SPI_I2S_SendData(SPI3,(0xFF & romAddress));
  while(!SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_TXE) || !SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_RXNE));

  for(i=0;i<dataLength;i++)
{
   SPI_I2S_ClearFlag(SPI3, SPI_I2S_FLAG_TXE);
   SPI_I2S_ClearFlag(SPI3, SPI_I2S_FLAG_RXNE);
   SPI_I2S_SendData(SPI3,0xFF);
   while(!SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_RXNE) || !SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_TXE));
   ramAddress[i] = (u8)SPI_I2S_ReceiveData(SPI3);
}
  SPI_I2S_ClearFlag(SPI3, SPI_I2S_FLAG_TXE);
  SPI_I2S_ClearFlag(SPI3, SPI_I2S_FLAG_RXNE);

  EEPROM_CS_H;                                                 //拉高片选
}

void EEPROM_Write(u16 romAddress,u8* ramAddress,u32 dataLength)
{
  u32 i=0;
  SPI_I2S_ClearFlag(SPI3, SPI_I2S_FLAG_TXE);
  EEPROM_CS_L;                                                 //拉低片选
  EEPROM_WP_CLOSE;                                           //拉高保护管脚
  SPI_I2S_SendData(SPI3,(u16)EEPROM_COMMAND_WREN);             //EEPROM_COMMAND_WREN=6
  while(!SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_TXE));

  EEPROM_CS_H;                                                 //拉高片选
  EEPROM_CS_L;                                                 //拉低片选
  SPI_I2S_ClearFlag(SPI3, SPI_I2S_FLAG_TXE);
  SPI_I2S_SendData(SPI3,(u16)EEPROM_COMMAND_WRITE);          //EEPROM_COMMAND_WRITE=2
  while(!SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_TXE));

  SPI_I2S_ClearFlag(SPI3, SPI_I2S_FLAG_TXE);
  SPI_I2S_SendData(SPI3,(0xFF & (romAddress>>8)));
  while(!SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_TXE));

  SPI_I2S_ClearFlag(SPI3, SPI_I2S_FLAG_TXE);
  SPI_I2S_SendData(SPI3,(0xFF & romAddress));
  while(!SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_TXE));
  for(i = 0 ; i < dataLength ; i++)
  {
SPI_I2S_ClearFlag(SPI3, SPI_I2S_FLAG_TXE);
SPI_I2S_SendData(SPI3,ramAddress[i]);
while(!SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_TXE));
  }
  SPI_I2S_ClearFlag(SPI3, SPI_I2S_FLAG_TXE);
  EEPROM_CS_H;                                                 //拉高片选
//  EEPROM_WP_OPEN;                                              //拉低保护管脚
}

//主函数
#include<stm32f10x.h>
#include"eeprom.h"

u8 data[10]={1,2,3,4,5,6,7,8,9,10};
u8 temp[10]={0};

int main(void)
{
  EEPROM_Init_Config();

  EEPROM_Write(0x1000,data,10);
  EEPROM_Read(0x1000,temp,10);

  while(1);
}